drm/amd/display: Fix pageflip event race condition for DCN.

[tomoyo/tomoyo-test1.git] / drivers / gpu / drm / amd / display / amdgpu_dm / amdgpu_dm.c

/*
 * Copyright 2015 Advanced Micro Devices, Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 *
 * Authors: AMD
 *
 */

/* The caprices of the preprocessor require that this be declared right here */
#define CREATE_TRACE_POINTS

#include "dm_services_types.h"
#include "dc.h"
#include "dc/inc/core_types.h"
#include "dal_asic_id.h"
#include "dmub/inc/dmub_srv.h"
#include "dc/inc/hw/dmcu.h"
#include "dc/inc/hw/abm.h"
#include "dc/dc_dmub_srv.h"

#include "vid.h"
#include "amdgpu.h"
#include "amdgpu_display.h"
#include "amdgpu_ucode.h"
#include "atom.h"
#include "amdgpu_dm.h"
#ifdef CONFIG_DRM_AMD_DC_HDCP
#include "amdgpu_dm_hdcp.h"
#include <drm/drm_hdcp.h>
#endif
#include "amdgpu_pm.h"

#include "amd_shared.h"
#include "amdgpu_dm_irq.h"
#include "dm_helpers.h"
#include "amdgpu_dm_mst_types.h"
#if defined(CONFIG_DEBUG_FS)
#include "amdgpu_dm_debugfs.h"
#endif

#include "ivsrcid/ivsrcid_vislands30.h"

#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/version.h>
#include <linux/types.h>
#include <linux/pm_runtime.h>
#include <linux/pci.h>
#include <linux/firmware.h>
#include <linux/component.h>

#include <drm/drm_atomic.h>
#include <drm/drm_atomic_uapi.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_dp_mst_helper.h>
#include <drm/drm_fb_helper.h>
#include <drm/drm_fourcc.h>
#include <drm/drm_edid.h>
#include <drm/drm_vblank.h>
#include <drm/drm_audio_component.h>
#include <drm/drm_hdcp.h>

#if defined(CONFIG_DRM_AMD_DC_DCN)
#include "ivsrcid/dcn/irqsrcs_dcn_1_0.h"

#include "dcn/dcn_1_0_offset.h"
#include "dcn/dcn_1_0_sh_mask.h"
#include "soc15_hw_ip.h"
#include "vega10_ip_offset.h"

#include "soc15_common.h"
#endif

#include "modules/inc/mod_freesync.h"
#include "modules/power/power_helpers.h"
#include "modules/inc/mod_info_packet.h"

#define FIRMWARE_RENOIR_DMUB "amdgpu/renoir_dmcub.bin"
MODULE_FIRMWARE(FIRMWARE_RENOIR_DMUB);

#define FIRMWARE_RAVEN_DMCU             "amdgpu/raven_dmcu.bin"
MODULE_FIRMWARE(FIRMWARE_RAVEN_DMCU);

/* Number of bytes in PSP header for firmware. */
#define PSP_HEADER_BYTES 0x100

/* Number of bytes in PSP footer for firmware. */
#define PSP_FOOTER_BYTES 0x100

/**
 * DOC: overview
 *
 * The AMDgpu display manager, **amdgpu_dm** (or even simpler,
 * **dm**) sits between DRM and DC. It acts as a liason, converting DRM
 * requests into DC requests, and DC responses into DRM responses.
 *
 * The root control structure is &struct amdgpu_display_manager.
 */

/* basic init/fini API */
static int amdgpu_dm_init(struct amdgpu_device *adev);
static void amdgpu_dm_fini(struct amdgpu_device *adev);

/*
 * initializes drm_device display related structures, based on the information
 * provided by DAL. The drm strcutures are: drm_crtc, drm_connector,
 * drm_encoder, drm_mode_config
 *
 * Returns 0 on success
 */
static int amdgpu_dm_initialize_drm_device(struct amdgpu_device *adev);
/* removes and deallocates the drm structures, created by the above function */
static void amdgpu_dm_destroy_drm_device(struct amdgpu_display_manager *dm);

static void
amdgpu_dm_update_connector_after_detect(struct amdgpu_dm_connector *aconnector);

static int amdgpu_dm_plane_init(struct amdgpu_display_manager *dm,
                                struct drm_plane *plane,
                                unsigned long possible_crtcs,
                                const struct dc_plane_cap *plane_cap);
static int amdgpu_dm_crtc_init(struct amdgpu_display_manager *dm,
                               struct drm_plane *plane,
                               uint32_t link_index);
static int amdgpu_dm_connector_init(struct amdgpu_display_manager *dm,
                                    struct amdgpu_dm_connector *amdgpu_dm_connector,
                                    uint32_t link_index,
                                    struct amdgpu_encoder *amdgpu_encoder);
static int amdgpu_dm_encoder_init(struct drm_device *dev,
                                  struct amdgpu_encoder *aencoder,
                                  uint32_t link_index);

static int amdgpu_dm_connector_get_modes(struct drm_connector *connector);

static int amdgpu_dm_atomic_commit(struct drm_device *dev,
                                   struct drm_atomic_state *state,
                                   bool nonblock);

static void amdgpu_dm_atomic_commit_tail(struct drm_atomic_state *state);

static int amdgpu_dm_atomic_check(struct drm_device *dev,
                                  struct drm_atomic_state *state);

static void handle_cursor_update(struct drm_plane *plane,
                                 struct drm_plane_state *old_plane_state);

static void amdgpu_dm_set_psr_caps(struct dc_link *link);
static bool amdgpu_dm_psr_enable(struct dc_stream_state *stream);
static bool amdgpu_dm_link_setup_psr(struct dc_stream_state *stream);
static bool amdgpu_dm_psr_disable(struct dc_stream_state *stream);


/*
 * dm_vblank_get_counter
 *
 * @brief
 * Get counter for number of vertical blanks
 *
 * @param
 * struct amdgpu_device *adev - [in] desired amdgpu device
 * int disp_idx - [in] which CRTC to get the counter from
 *
 * @return
 * Counter for vertical blanks
 */
static u32 dm_vblank_get_counter(struct amdgpu_device *adev, int crtc)
{
        if (crtc >= adev->mode_info.num_crtc)
                return 0;
        else {
                struct amdgpu_crtc *acrtc = adev->mode_info.crtcs[crtc];
                struct dm_crtc_state *acrtc_state = to_dm_crtc_state(
                                acrtc->base.state);


                if (acrtc_state->stream == NULL) {
                        DRM_ERROR("dc_stream_state is NULL for crtc '%d'!\n",
                                  crtc);
                        return 0;
                }

                return dc_stream_get_vblank_counter(acrtc_state->stream);
        }
}

static int dm_crtc_get_scanoutpos(struct amdgpu_device *adev, int crtc,
                                  u32 *vbl, u32 *position)
{
        uint32_t v_blank_start, v_blank_end, h_position, v_position;

        if ((crtc < 0) || (crtc >= adev->mode_info.num_crtc))
                return -EINVAL;
        else {
                struct amdgpu_crtc *acrtc = adev->mode_info.crtcs[crtc];
                struct dm_crtc_state *acrtc_state = to_dm_crtc_state(
                                                acrtc->base.state);

                if (acrtc_state->stream ==  NULL) {
                        DRM_ERROR("dc_stream_state is NULL for crtc '%d'!\n",
                                  crtc);
                        return 0;
                }

                /*
                 * TODO rework base driver to use values directly.
                 * for now parse it back into reg-format
                 */
                dc_stream_get_scanoutpos(acrtc_state->stream,
                                         &v_blank_start,
                                         &v_blank_end,
                                         &h_position,
                                         &v_position);

                *position = v_position | (h_position << 16);
                *vbl = v_blank_start | (v_blank_end << 16);
        }

        return 0;
}

static bool dm_is_idle(void *handle)
{
        /* XXX todo */
        return true;
}

static int dm_wait_for_idle(void *handle)
{
        /* XXX todo */
        return 0;
}

static bool dm_check_soft_reset(void *handle)
{
        return false;
}

static int dm_soft_reset(void *handle)
{
        /* XXX todo */
        return 0;
}

static struct amdgpu_crtc *
get_crtc_by_otg_inst(struct amdgpu_device *adev,
                     int otg_inst)
{
        struct drm_device *dev = adev->ddev;
        struct drm_crtc *crtc;
        struct amdgpu_crtc *amdgpu_crtc;

        if (otg_inst == -1) {
                WARN_ON(1);
                return adev->mode_info.crtcs[0];
        }

        list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
                amdgpu_crtc = to_amdgpu_crtc(crtc);

                if (amdgpu_crtc->otg_inst == otg_inst)
                        return amdgpu_crtc;
        }

        return NULL;
}

static inline bool amdgpu_dm_vrr_active(struct dm_crtc_state *dm_state)
{
        return dm_state->freesync_config.state == VRR_STATE_ACTIVE_VARIABLE ||
               dm_state->freesync_config.state == VRR_STATE_ACTIVE_FIXED;
}

/**
 * dm_pflip_high_irq() - Handle pageflip interrupt
 * @interrupt_params: ignored
 *
 * Handles the pageflip interrupt by notifying all interested parties
 * that the pageflip has been completed.
 */
static void dm_pflip_high_irq(void *interrupt_params)
{
        struct amdgpu_crtc *amdgpu_crtc;
        struct common_irq_params *irq_params = interrupt_params;
        struct amdgpu_device *adev = irq_params->adev;
        unsigned long flags;
        struct drm_pending_vblank_event *e;
        struct dm_crtc_state *acrtc_state;
        uint32_t vpos, hpos, v_blank_start, v_blank_end;
        bool vrr_active;

        amdgpu_crtc = get_crtc_by_otg_inst(adev, irq_params->irq_src - IRQ_TYPE_PFLIP);

        /* IRQ could occur when in initial stage */
        /* TODO work and BO cleanup */
        if (amdgpu_crtc == NULL) {
                DRM_DEBUG_DRIVER("CRTC is null, returning.\n");
                return;
        }

        spin_lock_irqsave(&adev->ddev->event_lock, flags);

        if (amdgpu_crtc->pflip_status != AMDGPU_FLIP_SUBMITTED){
                DRM_DEBUG_DRIVER("amdgpu_crtc->pflip_status = %d !=AMDGPU_FLIP_SUBMITTED(%d) on crtc:%d[%p] \n",
                                                 amdgpu_crtc->pflip_status,
                                                 AMDGPU_FLIP_SUBMITTED,
                                                 amdgpu_crtc->crtc_id,
                                                 amdgpu_crtc);
                spin_unlock_irqrestore(&adev->ddev->event_lock, flags);
                return;
        }

        /* page flip completed. */
        e = amdgpu_crtc->event;
        amdgpu_crtc->event = NULL;

        if (!e)
                WARN_ON(1);

        acrtc_state = to_dm_crtc_state(amdgpu_crtc->base.state);
        vrr_active = amdgpu_dm_vrr_active(acrtc_state);

        /* Fixed refresh rate, or VRR scanout position outside front-porch? */
        if (!vrr_active ||
            !dc_stream_get_scanoutpos(acrtc_state->stream, &v_blank_start,
                                      &v_blank_end, &hpos, &vpos) ||
            (vpos < v_blank_start)) {
                /* Update to correct count and vblank timestamp if racing with
                 * vblank irq. This also updates to the correct vblank timestamp
                 * even in VRR mode, as scanout is past the front-porch atm.
                 */
                drm_crtc_accurate_vblank_count(&amdgpu_crtc->base);

                /* Wake up userspace by sending the pageflip event with proper
                 * count and timestamp of vblank of flip completion.
                 */
                if (e) {
                        drm_crtc_send_vblank_event(&amdgpu_crtc->base, e);

                        /* Event sent, so done with vblank for this flip */
                        drm_crtc_vblank_put(&amdgpu_crtc->base);
                }
        } else if (e) {
                /* VRR active and inside front-porch: vblank count and
                 * timestamp for pageflip event will only be up to date after
                 * drm_crtc_handle_vblank() has been executed from late vblank
                 * irq handler after start of back-porch (vline 0). We queue the
                 * pageflip event for send-out by drm_crtc_handle_vblank() with
                 * updated timestamp and count, once it runs after us.
                 *
                 * We need to open-code this instead of using the helper
                 * drm_crtc_arm_vblank_event(), as that helper would
                 * call drm_crtc_accurate_vblank_count(), which we must
                 * not call in VRR mode while we are in front-porch!
                 */

                /* sequence will be replaced by real count during send-out. */
                e->sequence = drm_crtc_vblank_count(&amdgpu_crtc->base);
                e->pipe = amdgpu_crtc->crtc_id;

                list_add_tail(&e->base.link, &adev->ddev->vblank_event_list);
                e = NULL;
        }

        /* Keep track of vblank of this flip for flip throttling. We use the
         * cooked hw counter, as that one incremented at start of this vblank
         * of pageflip completion, so last_flip_vblank is the forbidden count
         * for queueing new pageflips if vsync + VRR is enabled.
         */
        amdgpu_crtc->last_flip_vblank = amdgpu_get_vblank_counter_kms(adev->ddev,
                                                        amdgpu_crtc->crtc_id);

        amdgpu_crtc->pflip_status = AMDGPU_FLIP_NONE;
        spin_unlock_irqrestore(&adev->ddev->event_lock, flags);

        DRM_DEBUG_DRIVER("crtc:%d[%p], pflip_stat:AMDGPU_FLIP_NONE, vrr[%d]-fp %d\n",
                         amdgpu_crtc->crtc_id, amdgpu_crtc,
                         vrr_active, (int) !e);
}

static void dm_vupdate_high_irq(void *interrupt_params)
{
        struct common_irq_params *irq_params = interrupt_params;
        struct amdgpu_device *adev = irq_params->adev;
        struct amdgpu_crtc *acrtc;
        struct dm_crtc_state *acrtc_state;
        unsigned long flags;

        acrtc = get_crtc_by_otg_inst(adev, irq_params->irq_src - IRQ_TYPE_VUPDATE);

        if (acrtc) {
                acrtc_state = to_dm_crtc_state(acrtc->base.state);

                DRM_DEBUG_DRIVER("crtc:%d, vupdate-vrr:%d\n", acrtc->crtc_id,
                                 amdgpu_dm_vrr_active(acrtc_state));

                /* Core vblank handling is done here after end of front-porch in
                 * vrr mode, as vblank timestamping will give valid results
                 * while now done after front-porch. This will also deliver
                 * page-flip completion events that have been queued to us
                 * if a pageflip happened inside front-porch.
                 */
                if (amdgpu_dm_vrr_active(acrtc_state)) {
                        drm_crtc_handle_vblank(&acrtc->base);

                        /* BTR processing for pre-DCE12 ASICs */
                        if (acrtc_state->stream &&
                            adev->family < AMDGPU_FAMILY_AI) {
                                spin_lock_irqsave(&adev->ddev->event_lock, flags);
                                mod_freesync_handle_v_update(
                                    adev->dm.freesync_module,
                                    acrtc_state->stream,
                                    &acrtc_state->vrr_params);

                                dc_stream_adjust_vmin_vmax(
                                    adev->dm.dc,
                                    acrtc_state->stream,
                                    &acrtc_state->vrr_params.adjust);
                                spin_unlock_irqrestore(&adev->ddev->event_lock, flags);
                        }
                }
        }
}

/**
 * dm_crtc_high_irq() - Handles CRTC interrupt
 * @interrupt_params: ignored
 *
 * Handles the CRTC/VSYNC interrupt by notfying DRM's VBLANK
 * event handler.
 */
static void dm_crtc_high_irq(void *interrupt_params)
{
        struct common_irq_params *irq_params = interrupt_params;
        struct amdgpu_device *adev = irq_params->adev;
        struct amdgpu_crtc *acrtc;
        struct dm_crtc_state *acrtc_state;
        unsigned long flags;

        acrtc = get_crtc_by_otg_inst(adev, irq_params->irq_src - IRQ_TYPE_VBLANK);

        if (acrtc) {
                acrtc_state = to_dm_crtc_state(acrtc->base.state);

                DRM_DEBUG_DRIVER("crtc:%d, vupdate-vrr:%d\n", acrtc->crtc_id,
                                 amdgpu_dm_vrr_active(acrtc_state));

                /* Core vblank handling at start of front-porch is only possible
                 * in non-vrr mode, as only there vblank timestamping will give
                 * valid results while done in front-porch. Otherwise defer it
                 * to dm_vupdate_high_irq after end of front-porch.
                 */
                if (!amdgpu_dm_vrr_active(acrtc_state))
                        drm_crtc_handle_vblank(&acrtc->base);

                /* Following stuff must happen at start of vblank, for crc
                 * computation and below-the-range btr support in vrr mode.
                 */
                amdgpu_dm_crtc_handle_crc_irq(&acrtc->base);

                if (acrtc_state->stream && adev->family >= AMDGPU_FAMILY_AI &&
                    acrtc_state->vrr_params.supported &&
                    acrtc_state->freesync_config.state == VRR_STATE_ACTIVE_VARIABLE) {
                        spin_lock_irqsave(&adev->ddev->event_lock, flags);
                        mod_freesync_handle_v_update(
                                adev->dm.freesync_module,
                                acrtc_state->stream,
                                &acrtc_state->vrr_params);

                        dc_stream_adjust_vmin_vmax(
                                adev->dm.dc,
                                acrtc_state->stream,
                                &acrtc_state->vrr_params.adjust);
                        spin_unlock_irqrestore(&adev->ddev->event_lock, flags);
                }
        }
}

#if defined(CONFIG_DRM_AMD_DC_DCN)
/**
 * dm_dcn_crtc_high_irq() - Handles VStartup interrupt for DCN generation ASICs
 * @interrupt params - interrupt parameters
 *
 * Notify DRM's vblank event handler at VSTARTUP
 *
 * Unlike DCE hardware, we trigger the handler at VSTARTUP. at which:
 * * We are close enough to VUPDATE - the point of no return for hw
 * * We are in the fixed portion of variable front porch when vrr is enabled
 * * We are before VUPDATE, where double-buffered vrr registers are swapped
 *
 * It is therefore the correct place to signal vblank, send user flip events,
 * and update VRR.
 */
static void dm_dcn_crtc_high_irq(void *interrupt_params)
{
        struct common_irq_params *irq_params = interrupt_params;
        struct amdgpu_device *adev = irq_params->adev;
        struct amdgpu_crtc *acrtc;
        struct dm_crtc_state *acrtc_state;
        unsigned long flags;

        acrtc = get_crtc_by_otg_inst(adev, irq_params->irq_src - IRQ_TYPE_VBLANK);

        if (!acrtc)
                return;

        acrtc_state = to_dm_crtc_state(acrtc->base.state);

        DRM_DEBUG_DRIVER("crtc:%d, vupdate-vrr:%d, planes:%d\n", acrtc->crtc_id,
                         amdgpu_dm_vrr_active(acrtc_state),
                         acrtc_state->active_planes);

        amdgpu_dm_crtc_handle_crc_irq(&acrtc->base);
        drm_crtc_handle_vblank(&acrtc->base);

        spin_lock_irqsave(&adev->ddev->event_lock, flags);

        if (acrtc_state->vrr_params.supported &&
            acrtc_state->freesync_config.state == VRR_STATE_ACTIVE_VARIABLE) {
                mod_freesync_handle_v_update(
                adev->dm.freesync_module,
                acrtc_state->stream,
                &acrtc_state->vrr_params);

                dc_stream_adjust_vmin_vmax(
                        adev->dm.dc,
                        acrtc_state->stream,
                        &acrtc_state->vrr_params.adjust);
        }

        /*
         * If there aren't any active_planes then DCH HUBP may be clock-gated.
         * In that case, pageflip completion interrupts won't fire and pageflip
         * completion events won't get delivered. Prevent this by sending
         * pending pageflip events from here if a flip is still pending.
         *
         * If any planes are enabled, use dm_pflip_high_irq() instead, to
         * avoid race conditions between flip programming and completion,
         * which could cause too early flip completion events.
         */
        if (acrtc->pflip_status == AMDGPU_FLIP_SUBMITTED &&
            acrtc_state->active_planes == 0) {
                if (acrtc->event) {
                        drm_crtc_send_vblank_event(&acrtc->base, acrtc->event);
                        acrtc->event = NULL;
                        drm_crtc_vblank_put(&acrtc->base);
                }
                acrtc->pflip_status = AMDGPU_FLIP_NONE;
        }

        spin_unlock_irqrestore(&adev->ddev->event_lock, flags);
}
#endif

static int dm_set_clockgating_state(void *handle,
                  enum amd_clockgating_state state)
{
        return 0;
}

static int dm_set_powergating_state(void *handle,
                  enum amd_powergating_state state)
{
        return 0;
}

/* Prototypes of private functions */
static int dm_early_init(void* handle);

/* Allocate memory for FBC compressed data  */
static void amdgpu_dm_fbc_init(struct drm_connector *connector)
{
        struct drm_device *dev = connector->dev;
        struct amdgpu_device *adev = dev->dev_private;
        struct dm_comressor_info *compressor = &adev->dm.compressor;
        struct amdgpu_dm_connector *aconn = to_amdgpu_dm_connector(connector);
        struct drm_display_mode *mode;
        unsigned long max_size = 0;

        if (adev->dm.dc->fbc_compressor == NULL)
                return;

        if (aconn->dc_link->connector_signal != SIGNAL_TYPE_EDP)
                return;

        if (compressor->bo_ptr)
                return;


        list_for_each_entry(mode, &connector->modes, head) {
                if (max_size < mode->htotal * mode->vtotal)
                        max_size = mode->htotal * mode->vtotal;
        }

        if (max_size) {
                int r = amdgpu_bo_create_kernel(adev, max_size * 4, PAGE_SIZE,
                            AMDGPU_GEM_DOMAIN_GTT, &compressor->bo_ptr,
                            &compressor->gpu_addr, &compressor->cpu_addr);

                if (r)
                        DRM_ERROR("DM: Failed to initialize FBC\n");
                else {
                        adev->dm.dc->ctx->fbc_gpu_addr = compressor->gpu_addr;
                        DRM_INFO("DM: FBC alloc %lu\n", max_size*4);
                }

        }

}

static int amdgpu_dm_audio_component_get_eld(struct device *kdev, int port,
                                          int pipe, bool *enabled,
                                          unsigned char *buf, int max_bytes)
{
        struct drm_device *dev = dev_get_drvdata(kdev);
        struct amdgpu_device *adev = dev->dev_private;
        struct drm_connector *connector;
        struct drm_connector_list_iter conn_iter;
        struct amdgpu_dm_connector *aconnector;
        int ret = 0;

        *enabled = false;

        mutex_lock(&adev->dm.audio_lock);

        drm_connector_list_iter_begin(dev, &conn_iter);
        drm_for_each_connector_iter(connector, &conn_iter) {
                aconnector = to_amdgpu_dm_connector(connector);
                if (aconnector->audio_inst != port)
                        continue;

                *enabled = true;
                ret = drm_eld_size(connector->eld);
                memcpy(buf, connector->eld, min(max_bytes, ret));

                break;
        }
        drm_connector_list_iter_end(&conn_iter);

        mutex_unlock(&adev->dm.audio_lock);

        DRM_DEBUG_KMS("Get ELD : idx=%d ret=%d en=%d\n", port, ret, *enabled);

        return ret;
}

static const struct drm_audio_component_ops amdgpu_dm_audio_component_ops = {
        .get_eld = amdgpu_dm_audio_component_get_eld,
};

static int amdgpu_dm_audio_component_bind(struct device *kdev,
                                       struct device *hda_kdev, void *data)
{
        struct drm_device *dev = dev_get_drvdata(kdev);
        struct amdgpu_device *adev = dev->dev_private;
        struct drm_audio_component *acomp = data;

        acomp->ops = &amdgpu_dm_audio_component_ops;
        acomp->dev = kdev;
        adev->dm.audio_component = acomp;

        return 0;
}

static void amdgpu_dm_audio_component_unbind(struct device *kdev,
                                          struct device *hda_kdev, void *data)
{
        struct drm_device *dev = dev_get_drvdata(kdev);
        struct amdgpu_device *adev = dev->dev_private;
        struct drm_audio_component *acomp = data;

        acomp->ops = NULL;
        acomp->dev = NULL;
        adev->dm.audio_component = NULL;
}

static const struct component_ops amdgpu_dm_audio_component_bind_ops = {
        .bind   = amdgpu_dm_audio_component_bind,
        .unbind = amdgpu_dm_audio_component_unbind,
};

static int amdgpu_dm_audio_init(struct amdgpu_device *adev)
{
        int i, ret;

        if (!amdgpu_audio)
                return 0;

        adev->mode_info.audio.enabled = true;

        adev->mode_info.audio.num_pins = adev->dm.dc->res_pool->audio_count;

        for (i = 0; i < adev->mode_info.audio.num_pins; i++) {
                adev->mode_info.audio.pin[i].channels = -1;
                adev->mode_info.audio.pin[i].rate = -1;
                adev->mode_info.audio.pin[i].bits_per_sample = -1;
                adev->mode_info.audio.pin[i].status_bits = 0;
                adev->mode_info.audio.pin[i].category_code = 0;
                adev->mode_info.audio.pin[i].connected = false;
                adev->mode_info.audio.pin[i].id =
                        adev->dm.dc->res_pool->audios[i]->inst;
                adev->mode_info.audio.pin[i].offset = 0;
        }

        ret = component_add(adev->dev, &amdgpu_dm_audio_component_bind_ops);
        if (ret < 0)
                return ret;

        adev->dm.audio_registered = true;

        return 0;
}

static void amdgpu_dm_audio_fini(struct amdgpu_device *adev)
{
        if (!amdgpu_audio)
                return;

        if (!adev->mode_info.audio.enabled)
                return;

        if (adev->dm.audio_registered) {
                component_del(adev->dev, &amdgpu_dm_audio_component_bind_ops);
                adev->dm.audio_registered = false;
        }

        /* TODO: Disable audio? */

        adev->mode_info.audio.enabled = false;
}

void amdgpu_dm_audio_eld_notify(struct amdgpu_device *adev, int pin)
{
        struct drm_audio_component *acomp = adev->dm.audio_component;

        if (acomp && acomp->audio_ops && acomp->audio_ops->pin_eld_notify) {
                DRM_DEBUG_KMS("Notify ELD: %d\n", pin);

                acomp->audio_ops->pin_eld_notify(acomp->audio_ops->audio_ptr,
                                                 pin, -1);
        }
}

static int dm_dmub_hw_init(struct amdgpu_device *adev)
{
        const struct dmcub_firmware_header_v1_0 *hdr;
        struct dmub_srv *dmub_srv = adev->dm.dmub_srv;
        struct dmub_srv_fb_info *fb_info = adev->dm.dmub_fb_info;
        const struct firmware *dmub_fw = adev->dm.dmub_fw;
        struct dmcu *dmcu = adev->dm.dc->res_pool->dmcu;
        struct abm *abm = adev->dm.dc->res_pool->abm;
        struct dmub_srv_hw_params hw_params;
        enum dmub_status status;
        const unsigned char *fw_inst_const, *fw_bss_data;
        uint32_t i, fw_inst_const_size, fw_bss_data_size;
        bool has_hw_support;

        if (!dmub_srv)
                /* DMUB isn't supported on the ASIC. */
                return 0;

        if (!fb_info) {
                DRM_ERROR("No framebuffer info for DMUB service.\n");
                return -EINVAL;
        }

        if (!dmub_fw) {
                /* Firmware required for DMUB support. */
                DRM_ERROR("No firmware provided for DMUB.\n");
                return -EINVAL;
        }

        status = dmub_srv_has_hw_support(dmub_srv, &has_hw_support);
        if (status != DMUB_STATUS_OK) {
                DRM_ERROR("Error checking HW support for DMUB: %d\n", status);
                return -EINVAL;
        }

        if (!has_hw_support) {
                DRM_INFO("DMUB unsupported on ASIC\n");
                return 0;
        }

        hdr = (const struct dmcub_firmware_header_v1_0 *)dmub_fw->data;

        fw_inst_const = dmub_fw->data +
                        le32_to_cpu(hdr->header.ucode_array_offset_bytes) +
                        PSP_HEADER_BYTES;

        fw_bss_data = dmub_fw->data +
                      le32_to_cpu(hdr->header.ucode_array_offset_bytes) +
                      le32_to_cpu(hdr->inst_const_bytes);

        /* Copy firmware and bios info into FB memory. */
        fw_inst_const_size = le32_to_cpu(hdr->inst_const_bytes) -
                             PSP_HEADER_BYTES - PSP_FOOTER_BYTES;

        fw_bss_data_size = le32_to_cpu(hdr->bss_data_bytes);

        memcpy(fb_info->fb[DMUB_WINDOW_0_INST_CONST].cpu_addr, fw_inst_const,
               fw_inst_const_size);
        memcpy(fb_info->fb[DMUB_WINDOW_2_BSS_DATA].cpu_addr, fw_bss_data,
               fw_bss_data_size);
        memcpy(fb_info->fb[DMUB_WINDOW_3_VBIOS].cpu_addr, adev->bios,
               adev->bios_size);

        /* Reset regions that need to be reset. */
        memset(fb_info->fb[DMUB_WINDOW_4_MAILBOX].cpu_addr, 0,
        fb_info->fb[DMUB_WINDOW_4_MAILBOX].size);

        memset(fb_info->fb[DMUB_WINDOW_5_TRACEBUFF].cpu_addr, 0,
               fb_info->fb[DMUB_WINDOW_5_TRACEBUFF].size);

        memset(fb_info->fb[DMUB_WINDOW_6_FW_STATE].cpu_addr, 0,
               fb_info->fb[DMUB_WINDOW_6_FW_STATE].size);

        /* Initialize hardware. */
        memset(&hw_params, 0, sizeof(hw_params));
        hw_params.fb_base = adev->gmc.fb_start;
        hw_params.fb_offset = adev->gmc.aper_base;

        if (dmcu)
                hw_params.psp_version = dmcu->psp_version;

        for (i = 0; i < fb_info->num_fb; ++i)
                hw_params.fb[i] = &fb_info->fb[i];

        status = dmub_srv_hw_init(dmub_srv, &hw_params);
        if (status != DMUB_STATUS_OK) {
                DRM_ERROR("Error initializing DMUB HW: %d\n", status);
                return -EINVAL;
        }

        /* Wait for firmware load to finish. */
        status = dmub_srv_wait_for_auto_load(dmub_srv, 100000);
        if (status != DMUB_STATUS_OK)
                DRM_WARN("Wait for DMUB auto-load failed: %d\n", status);

        /* Init DMCU and ABM if available. */
        if (dmcu && abm) {
                dmcu->funcs->dmcu_init(dmcu);
                abm->dmcu_is_running = dmcu->funcs->is_dmcu_initialized(dmcu);
        }

        adev->dm.dc->ctx->dmub_srv = dc_dmub_srv_create(adev->dm.dc, dmub_srv);
        if (!adev->dm.dc->ctx->dmub_srv) {
                DRM_ERROR("Couldn't allocate DC DMUB server!\n");
                return -ENOMEM;
        }

        DRM_INFO("DMUB hardware initialized: version=0x%08X\n",
                 adev->dm.dmcub_fw_version);

        return 0;
}

static int amdgpu_dm_init(struct amdgpu_device *adev)
{
        struct dc_init_data init_data;
#ifdef CONFIG_DRM_AMD_DC_HDCP
        struct dc_callback_init init_params;
#endif
        int r;

        adev->dm.ddev = adev->ddev;
        adev->dm.adev = adev;

        /* Zero all the fields */
        memset(&init_data, 0, sizeof(init_data));
#ifdef CONFIG_DRM_AMD_DC_HDCP
        memset(&init_params, 0, sizeof(init_params));
#endif

        mutex_init(&adev->dm.dc_lock);
        mutex_init(&adev->dm.audio_lock);

        if(amdgpu_dm_irq_init(adev)) {
                DRM_ERROR("amdgpu: failed to initialize DM IRQ support.\n");
                goto error;
        }

        init_data.asic_id.chip_family = adev->family;

        init_data.asic_id.pci_revision_id = adev->rev_id;
        init_data.asic_id.hw_internal_rev = adev->external_rev_id;

        init_data.asic_id.vram_width = adev->gmc.vram_width;
        /* TODO: initialize init_data.asic_id.vram_type here!!!! */
        init_data.asic_id.atombios_base_address =
                adev->mode_info.atom_context->bios;

        init_data.driver = adev;

        adev->dm.cgs_device = amdgpu_cgs_create_device(adev);

        if (!adev->dm.cgs_device) {
                DRM_ERROR("amdgpu: failed to create cgs device.\n");
                goto error;
        }

        init_data.cgs_device = adev->dm.cgs_device;

        init_data.dce_environment = DCE_ENV_PRODUCTION_DRV;

        switch (adev->asic_type) {
        case CHIP_CARRIZO:
        case CHIP_STONEY:
        case CHIP_RAVEN:
        case CHIP_RENOIR:
                init_data.flags.gpu_vm_support = true;
                break;
        default:
                break;
        }

        if (amdgpu_dc_feature_mask & DC_FBC_MASK)
                init_data.flags.fbc_support = true;

        if (amdgpu_dc_feature_mask & DC_MULTI_MON_PP_MCLK_SWITCH_MASK)
                init_data.flags.multi_mon_pp_mclk_switch = true;

        if (amdgpu_dc_feature_mask & DC_DISABLE_FRACTIONAL_PWM_MASK)
                init_data.flags.disable_fractional_pwm = true;

        init_data.flags.power_down_display_on_boot = true;

        init_data.soc_bounding_box = adev->dm.soc_bounding_box;

        /* Display Core create. */
        adev->dm.dc = dc_create(&init_data);

        if (adev->dm.dc) {
                DRM_INFO("Display Core initialized with v%s!\n", DC_VER);
        } else {
                DRM_INFO("Display Core failed to initialize with v%s!\n", DC_VER);
                goto error;
        }

        r = dm_dmub_hw_init(adev);
        if (r) {
                DRM_ERROR("DMUB interface failed to initialize: status=%d\n", r);
                goto error;
        }

        dc_hardware_init(adev->dm.dc);

        adev->dm.freesync_module = mod_freesync_create(adev->dm.dc);
        if (!adev->dm.freesync_module) {
                DRM_ERROR(
                "amdgpu: failed to initialize freesync_module.\n");
        } else
                DRM_DEBUG_DRIVER("amdgpu: freesync_module init done %p.\n",
                                adev->dm.freesync_module);

        amdgpu_dm_init_color_mod();

#ifdef CONFIG_DRM_AMD_DC_HDCP
        if (adev->asic_type >= CHIP_RAVEN) {
                adev->dm.hdcp_workqueue = hdcp_create_workqueue(&adev->psp, &init_params.cp_psp, adev->dm.dc);

                if (!adev->dm.hdcp_workqueue)
                        DRM_ERROR("amdgpu: failed to initialize hdcp_workqueue.\n");
                else
                        DRM_DEBUG_DRIVER("amdgpu: hdcp_workqueue init done %p.\n", adev->dm.hdcp_workqueue);

                dc_init_callbacks(adev->dm.dc, &init_params);
        }
#endif
        if (amdgpu_dm_initialize_drm_device(adev)) {
                DRM_ERROR(
                "amdgpu: failed to initialize sw for display support.\n");
                goto error;
        }

        /* Update the actual used number of crtc */
        adev->mode_info.num_crtc = adev->dm.display_indexes_num;

        /* TODO: Add_display_info? */

        /* TODO use dynamic cursor width */
        adev->ddev->mode_config.cursor_width = adev->dm.dc->caps.max_cursor_size;
        adev->ddev->mode_config.cursor_height = adev->dm.dc->caps.max_cursor_size;

        if (drm_vblank_init(adev->ddev, adev->dm.display_indexes_num)) {
                DRM_ERROR(
                "amdgpu: failed to initialize sw for display support.\n");
                goto error;
        }

#if defined(CONFIG_DEBUG_FS)
        if (dtn_debugfs_init(adev))
                DRM_ERROR("amdgpu: failed initialize dtn debugfs support.\n");
#endif

        DRM_DEBUG_DRIVER("KMS initialized.\n");

        return 0;
error:
        amdgpu_dm_fini(adev);

        return -EINVAL;
}

static void amdgpu_dm_fini(struct amdgpu_device *adev)
{
        amdgpu_dm_audio_fini(adev);

        amdgpu_dm_destroy_drm_device(&adev->dm);

#ifdef CONFIG_DRM_AMD_DC_HDCP
        if (adev->dm.hdcp_workqueue) {
                hdcp_destroy(adev->dm.hdcp_workqueue);
                adev->dm.hdcp_workqueue = NULL;
        }

        if (adev->dm.dc)
                dc_deinit_callbacks(adev->dm.dc);
#endif
        if (adev->dm.dc->ctx->dmub_srv) {
                dc_dmub_srv_destroy(&adev->dm.dc->ctx->dmub_srv);
                adev->dm.dc->ctx->dmub_srv = NULL;
        }

        if (adev->dm.dmub_bo)
                amdgpu_bo_free_kernel(&adev->dm.dmub_bo,
                                      &adev->dm.dmub_bo_gpu_addr,
                                      &adev->dm.dmub_bo_cpu_addr);

        /* DC Destroy TODO: Replace destroy DAL */
        if (adev->dm.dc)
                dc_destroy(&adev->dm.dc);
        /*
         * TODO: pageflip, vlank interrupt
         *
         * amdgpu_dm_irq_fini(adev);
         */

        if (adev->dm.cgs_device) {
                amdgpu_cgs_destroy_device(adev->dm.cgs_device);
                adev->dm.cgs_device = NULL;
        }
        if (adev->dm.freesync_module) {
                mod_freesync_destroy(adev->dm.freesync_module);
                adev->dm.freesync_module = NULL;
        }

        mutex_destroy(&adev->dm.audio_lock);
        mutex_destroy(&adev->dm.dc_lock);

        return;
}

static int load_dmcu_fw(struct amdgpu_device *adev)
{
        const char *fw_name_dmcu = NULL;
        int r;
        const struct dmcu_firmware_header_v1_0 *hdr;

        switch(adev->asic_type) {
        case CHIP_BONAIRE:
        case CHIP_HAWAII:
        case CHIP_KAVERI:
        case CHIP_KABINI:
        case CHIP_MULLINS:
        case CHIP_TONGA:
        case CHIP_FIJI:
        case CHIP_CARRIZO:
        case CHIP_STONEY:
        case CHIP_POLARIS11:
        case CHIP_POLARIS10:
        case CHIP_POLARIS12:
        case CHIP_VEGAM:
        case CHIP_VEGA10:
        case CHIP_VEGA12:
        case CHIP_VEGA20:
        case CHIP_NAVI10:
        case CHIP_NAVI14:
        case CHIP_NAVI12:
        case CHIP_RENOIR:
                return 0;
        case CHIP_RAVEN:
                if (ASICREV_IS_PICASSO(adev->external_rev_id))
                        fw_name_dmcu = FIRMWARE_RAVEN_DMCU;
                else if (ASICREV_IS_RAVEN2(adev->external_rev_id))
                        fw_name_dmcu = FIRMWARE_RAVEN_DMCU;
                else
                        return 0;
                break;
        default:
                DRM_ERROR("Unsupported ASIC type: 0x%X\n", adev->asic_type);
                return -EINVAL;
        }

        if (adev->firmware.load_type != AMDGPU_FW_LOAD_PSP) {
                DRM_DEBUG_KMS("dm: DMCU firmware not supported on direct or SMU loading\n");
                return 0;
        }

        r = request_firmware_direct(&adev->dm.fw_dmcu, fw_name_dmcu, adev->dev);
        if (r == -ENOENT) {
                /* DMCU firmware is not necessary, so don't raise a fuss if it's missing */
                DRM_DEBUG_KMS("dm: DMCU firmware not found\n");
                adev->dm.fw_dmcu = NULL;
                return 0;
        }
        if (r) {
                dev_err(adev->dev, "amdgpu_dm: Can't load firmware \"%s\"\n",
                        fw_name_dmcu);
                return r;
        }

        r = amdgpu_ucode_validate(adev->dm.fw_dmcu);
        if (r) {
                dev_err(adev->dev, "amdgpu_dm: Can't validate firmware \"%s\"\n",
                        fw_name_dmcu);
                release_firmware(adev->dm.fw_dmcu);
                adev->dm.fw_dmcu = NULL;
                return r;
        }

        hdr = (const struct dmcu_firmware_header_v1_0 *)adev->dm.fw_dmcu->data;
        adev->firmware.ucode[AMDGPU_UCODE_ID_DMCU_ERAM].ucode_id = AMDGPU_UCODE_ID_DMCU_ERAM;
        adev->firmware.ucode[AMDGPU_UCODE_ID_DMCU_ERAM].fw = adev->dm.fw_dmcu;
        adev->firmware.fw_size +=
                ALIGN(le32_to_cpu(hdr->header.ucode_size_bytes) - le32_to_cpu(hdr->intv_size_bytes), PAGE_SIZE);

        adev->firmware.ucode[AMDGPU_UCODE_ID_DMCU_INTV].ucode_id = AMDGPU_UCODE_ID_DMCU_INTV;
        adev->firmware.ucode[AMDGPU_UCODE_ID_DMCU_INTV].fw = adev->dm.fw_dmcu;
        adev->firmware.fw_size +=
                ALIGN(le32_to_cpu(hdr->intv_size_bytes), PAGE_SIZE);

        adev->dm.dmcu_fw_version = le32_to_cpu(hdr->header.ucode_version);

        DRM_DEBUG_KMS("PSP loading DMCU firmware\n");

        return 0;
}

static uint32_t amdgpu_dm_dmub_reg_read(void *ctx, uint32_t address)
{
        struct amdgpu_device *adev = ctx;

        return dm_read_reg(adev->dm.dc->ctx, address);
}

static void amdgpu_dm_dmub_reg_write(void *ctx, uint32_t address,
                                     uint32_t value)
{
        struct amdgpu_device *adev = ctx;

        return dm_write_reg(adev->dm.dc->ctx, address, value);
}

static int dm_dmub_sw_init(struct amdgpu_device *adev)
{
        struct dmub_srv_create_params create_params;
        struct dmub_srv_region_params region_params;
        struct dmub_srv_region_info region_info;
        struct dmub_srv_fb_params fb_params;
        struct dmub_srv_fb_info *fb_info;
        struct dmub_srv *dmub_srv;
        const struct dmcub_firmware_header_v1_0 *hdr;
        const char *fw_name_dmub;
        enum dmub_asic dmub_asic;
        enum dmub_status status;
        int r;

        switch (adev->asic_type) {
        case CHIP_RENOIR:
                dmub_asic = DMUB_ASIC_DCN21;
                fw_name_dmub = FIRMWARE_RENOIR_DMUB;
                break;

        default:
                /* ASIC doesn't support DMUB. */
                return 0;
        }

        r = request_firmware_direct(&adev->dm.dmub_fw, fw_name_dmub, adev->dev);
        if (r) {
                DRM_ERROR("DMUB firmware loading failed: %d\n", r);
                return 0;
        }

        r = amdgpu_ucode_validate(adev->dm.dmub_fw);
        if (r) {
                DRM_ERROR("Couldn't validate DMUB firmware: %d\n", r);
                return 0;
        }

        if (adev->firmware.load_type != AMDGPU_FW_LOAD_PSP) {
                DRM_WARN("Only PSP firmware loading is supported for DMUB\n");
                return 0;
        }

        hdr = (const struct dmcub_firmware_header_v1_0 *)adev->dm.dmub_fw->data;
        adev->firmware.ucode[AMDGPU_UCODE_ID_DMCUB].ucode_id =
                AMDGPU_UCODE_ID_DMCUB;
        adev->firmware.ucode[AMDGPU_UCODE_ID_DMCUB].fw = adev->dm.dmub_fw;
        adev->firmware.fw_size +=
                ALIGN(le32_to_cpu(hdr->inst_const_bytes), PAGE_SIZE);

        adev->dm.dmcub_fw_version = le32_to_cpu(hdr->header.ucode_version);

        DRM_INFO("Loading DMUB firmware via PSP: version=0x%08X\n",
                 adev->dm.dmcub_fw_version);

        adev->dm.dmub_srv = kzalloc(sizeof(*adev->dm.dmub_srv), GFP_KERNEL);
        dmub_srv = adev->dm.dmub_srv;

        if (!dmub_srv) {
                DRM_ERROR("Failed to allocate DMUB service!\n");
                return -ENOMEM;
        }

        memset(&create_params, 0, sizeof(create_params));
        create_params.user_ctx = adev;
        create_params.funcs.reg_read = amdgpu_dm_dmub_reg_read;
        create_params.funcs.reg_write = amdgpu_dm_dmub_reg_write;
        create_params.asic = dmub_asic;

        /* Create the DMUB service. */
        status = dmub_srv_create(dmub_srv, &create_params);
        if (status != DMUB_STATUS_OK) {
                DRM_ERROR("Error creating DMUB service: %d\n", status);
                return -EINVAL;
        }

        /* Calculate the size of all the regions for the DMUB service. */
        memset(&region_params, 0, sizeof(region_params));

        region_params.inst_const_size = le32_to_cpu(hdr->inst_const_bytes) -
                                        PSP_HEADER_BYTES - PSP_FOOTER_BYTES;
        region_params.bss_data_size = le32_to_cpu(hdr->bss_data_bytes);
        region_params.vbios_size = adev->bios_size;
        region_params.fw_bss_data =
                adev->dm.dmub_fw->data +
                le32_to_cpu(hdr->header.ucode_array_offset_bytes) +
                le32_to_cpu(hdr->inst_const_bytes);

        status = dmub_srv_calc_region_info(dmub_srv, &region_params,
                                           &region_info);

        if (status != DMUB_STATUS_OK) {
                DRM_ERROR("Error calculating DMUB region info: %d\n", status);
                return -EINVAL;
        }

        /*
         * Allocate a framebuffer based on the total size of all the regions.
         * TODO: Move this into GART.
         */
        r = amdgpu_bo_create_kernel(adev, region_info.fb_size, PAGE_SIZE,
                                    AMDGPU_GEM_DOMAIN_VRAM, &adev->dm.dmub_bo,
                                    &adev->dm.dmub_bo_gpu_addr,
                                    &adev->dm.dmub_bo_cpu_addr);
        if (r)
                return r;

        /* Rebase the regions on the framebuffer address. */
        memset(&fb_params, 0, sizeof(fb_params));
        fb_params.cpu_addr = adev->dm.dmub_bo_cpu_addr;
        fb_params.gpu_addr = adev->dm.dmub_bo_gpu_addr;
        fb_params.region_info = &region_info;

        adev->dm.dmub_fb_info =
                kzalloc(sizeof(*adev->dm.dmub_fb_info), GFP_KERNEL);
        fb_info = adev->dm.dmub_fb_info;

        if (!fb_info) {
                DRM_ERROR(
                        "Failed to allocate framebuffer info for DMUB service!\n");
                return -ENOMEM;
        }

        status = dmub_srv_calc_fb_info(dmub_srv, &fb_params, fb_info);
        if (status != DMUB_STATUS_OK) {
                DRM_ERROR("Error calculating DMUB FB info: %d\n", status);
                return -EINVAL;
        }

        return 0;
}

static int dm_sw_init(void *handle)
{
        struct amdgpu_device *adev = (struct amdgpu_device *)handle;
        int r;

        r = dm_dmub_sw_init(adev);
        if (r)
                return r;

        return load_dmcu_fw(adev);
}

static int dm_sw_fini(void *handle)
{
        struct amdgpu_device *adev = (struct amdgpu_device *)handle;

        kfree(adev->dm.dmub_fb_info);
        adev->dm.dmub_fb_info = NULL;

        if (adev->dm.dmub_srv) {
                dmub_srv_destroy(adev->dm.dmub_srv);
                adev->dm.dmub_srv = NULL;
        }

        if (adev->dm.dmub_fw) {
                release_firmware(adev->dm.dmub_fw);
                adev->dm.dmub_fw = NULL;
        }

        if(adev->dm.fw_dmcu) {
                release_firmware(adev->dm.fw_dmcu);
                adev->dm.fw_dmcu = NULL;
        }

        return 0;
}

static int detect_mst_link_for_all_connectors(struct drm_device *dev)
{
        struct amdgpu_dm_connector *aconnector;
        struct drm_connector *connector;
        struct drm_connector_list_iter iter;
        int ret = 0;

        drm_connector_list_iter_begin(dev, &iter);
        drm_for_each_connector_iter(connector, &iter) {
                aconnector = to_amdgpu_dm_connector(connector);
                if (aconnector->dc_link->type == dc_connection_mst_branch &&
                    aconnector->mst_mgr.aux) {
                        DRM_DEBUG_DRIVER("DM_MST: starting TM on aconnector: %p [id: %d]\n",
                                         aconnector,
                                         aconnector->base.base.id);

                        ret = drm_dp_mst_topology_mgr_set_mst(&aconnector->mst_mgr, true);
                        if (ret < 0) {
                                DRM_ERROR("DM_MST: Failed to start MST\n");
                                aconnector->dc_link->type =
                                        dc_connection_single;
                                break;
                        }
                }
        }
        drm_connector_list_iter_end(&iter);

        return ret;
}

static int dm_late_init(void *handle)
{
        struct amdgpu_device *adev = (struct amdgpu_device *)handle;

        struct dmcu_iram_parameters params;
        unsigned int linear_lut[16];
        int i;
        struct dmcu *dmcu = adev->dm.dc->res_pool->dmcu;
        bool ret = false;

        for (i = 0; i < 16; i++)
                linear_lut[i] = 0xFFFF * i / 15;

        params.set = 0;
        params.backlight_ramping_start = 0xCCCC;
        params.backlight_ramping_reduction = 0xCCCCCCCC;
        params.backlight_lut_array_size = 16;
        params.backlight_lut_array = linear_lut;

        /* Min backlight level after ABM reduction,  Don't allow below 1%
         * 0xFFFF x 0.01 = 0x28F
         */
        params.min_abm_backlight = 0x28F;

        /* todo will enable for navi10 */
        if (adev->asic_type <= CHIP_RAVEN) {
                ret = dmcu_load_iram(dmcu, params);

                if (!ret)
                        return -EINVAL;
        }

        return detect_mst_link_for_all_connectors(adev->ddev);
}

static void s3_handle_mst(struct drm_device *dev, bool suspend)
{
        struct amdgpu_dm_connector *aconnector;
        struct drm_connector *connector;
        struct drm_connector_list_iter iter;
        struct drm_dp_mst_topology_mgr *mgr;
        int ret;
        bool need_hotplug = false;

        drm_connector_list_iter_begin(dev, &iter);
        drm_for_each_connector_iter(connector, &iter) {
                aconnector = to_amdgpu_dm_connector(connector);
                if (aconnector->dc_link->type != dc_connection_mst_branch ||
                    aconnector->mst_port)
                        continue;

                mgr = &aconnector->mst_mgr;

                if (suspend) {
                        drm_dp_mst_topology_mgr_suspend(mgr);
                } else {
                        ret = drm_dp_mst_topology_mgr_resume(mgr, true);
                        if (ret < 0) {
                                drm_dp_mst_topology_mgr_set_mst(mgr, false);
                                need_hotplug = true;
                        }
                }
        }
        drm_connector_list_iter_end(&iter);

        if (need_hotplug)
                drm_kms_helper_hotplug_event(dev);
}

static int amdgpu_dm_smu_write_watermarks_table(struct amdgpu_device *adev)
{
        struct smu_context *smu = &adev->smu;
        int ret = 0;

        if (!is_support_sw_smu(adev))
                return 0;

        /* This interface is for dGPU Navi1x.Linux dc-pplib interface depends
         * on window driver dc implementation.
         * For Navi1x, clock settings of dcn watermarks are fixed. the settings
         * should be passed to smu during boot up and resume from s3.
         * boot up: dc calculate dcn watermark clock settings within dc_create,
         * dcn20_resource_construct
         * then call pplib functions below to pass the settings to smu:
         * smu_set_watermarks_for_clock_ranges
         * smu_set_watermarks_table
         * navi10_set_watermarks_table
         * smu_write_watermarks_table
         *
         * For Renoir, clock settings of dcn watermark are also fixed values.
         * dc has implemented different flow for window driver:
         * dc_hardware_init / dc_set_power_state
         * dcn10_init_hw
         * notify_wm_ranges
         * set_wm_ranges
         * -- Linux
         * smu_set_watermarks_for_clock_ranges
         * renoir_set_watermarks_table
         * smu_write_watermarks_table
         *
         * For Linux,
         * dc_hardware_init -> amdgpu_dm_init
         * dc_set_power_state --> dm_resume
         *
         * therefore, this function apply to navi10/12/14 but not Renoir
         * *
         */
        switch(adev->asic_type) {
        case CHIP_NAVI10:
        case CHIP_NAVI14:
        case CHIP_NAVI12:
                break;
        default:
                return 0;
        }

        mutex_lock(&smu->mutex);

        /* pass data to smu controller */
        if ((smu->watermarks_bitmap & WATERMARKS_EXIST) &&
                        !(smu->watermarks_bitmap & WATERMARKS_LOADED)) {
                ret = smu_write_watermarks_table(smu);

                if (ret) {
                        mutex_unlock(&smu->mutex);
                        DRM_ERROR("Failed to update WMTABLE!\n");
                        return ret;
                }
                smu->watermarks_bitmap |= WATERMARKS_LOADED;
        }

        mutex_unlock(&smu->mutex);

        return 0;
}

/**
 * dm_hw_init() - Initialize DC device
 * @handle: The base driver device containing the amdgpu_dm device.
 *
 * Initialize the &struct amdgpu_display_manager device. This involves calling
 * the initializers of each DM component, then populating the struct with them.
 *
 * Although the function implies hardware initialization, both hardware and
 * software are initialized here. Splitting them out to their relevant init
 * hooks is a future TODO item.
 *
 * Some notable things that are initialized here:
 *
 * - Display Core, both software and hardware
 * - DC modules that we need (freesync and color management)
 * - DRM software states
 * - Interrupt sources and handlers
 * - Vblank support
 * - Debug FS entries, if enabled
 */
static int dm_hw_init(void *handle)
{
        struct amdgpu_device *adev = (struct amdgpu_device *)handle;
        /* Create DAL display manager */
        amdgpu_dm_init(adev);
        amdgpu_dm_hpd_init(adev);

        return 0;
}

/**
 * dm_hw_fini() - Teardown DC device
 * @handle: The base driver device containing the amdgpu_dm device.
 *
 * Teardown components within &struct amdgpu_display_manager that require
 * cleanup. This involves cleaning up the DRM device, DC, and any modules that
 * were loaded. Also flush IRQ workqueues and disable them.
 */
static int dm_hw_fini(void *handle)
{
        struct amdgpu_device *adev = (struct amdgpu_device *)handle;

        amdgpu_dm_hpd_fini(adev);

        amdgpu_dm_irq_fini(adev);
        amdgpu_dm_fini(adev);
        return 0;
}

static int dm_suspend(void *handle)
{
        struct amdgpu_device *adev = handle;
        struct amdgpu_display_manager *dm = &adev->dm;
        int ret = 0;

        WARN_ON(adev->dm.cached_state);
        adev->dm.cached_state = drm_atomic_helper_suspend(adev->ddev);

        s3_handle_mst(adev->ddev, true);

        amdgpu_dm_irq_suspend(adev);


        dc_set_power_state(dm->dc, DC_ACPI_CM_POWER_STATE_D3);

        return ret;
}

static struct amdgpu_dm_connector *
amdgpu_dm_find_first_crtc_matching_connector(struct drm_atomic_state *state,
                                             struct drm_crtc *crtc)
{
        uint32_t i;
        struct drm_connector_state *new_con_state;
        struct drm_connector *connector;
        struct drm_crtc *crtc_from_state;

        for_each_new_connector_in_state(state, connector, new_con_state, i) {
                crtc_from_state = new_con_state->crtc;

                if (crtc_from_state == crtc)
                        return to_amdgpu_dm_connector(connector);
        }

        return NULL;
}

static void emulated_link_detect(struct dc_link *link)
{
        struct dc_sink_init_data sink_init_data = { 0 };
        struct display_sink_capability sink_caps = { 0 };
        enum dc_edid_status edid_status;
        struct dc_context *dc_ctx = link->ctx;
        struct dc_sink *sink = NULL;
        struct dc_sink *prev_sink = NULL;

        link->type = dc_connection_none;
        prev_sink = link->local_sink;

        if (prev_sink != NULL)
                dc_sink_retain(prev_sink);

        switch (link->connector_signal) {
        case SIGNAL_TYPE_HDMI_TYPE_A: {
                sink_caps.transaction_type = DDC_TRANSACTION_TYPE_I2C;
                sink_caps.signal = SIGNAL_TYPE_HDMI_TYPE_A;
                break;
        }

        case SIGNAL_TYPE_DVI_SINGLE_LINK: {
                sink_caps.transaction_type = DDC_TRANSACTION_TYPE_I2C;
                sink_caps.signal = SIGNAL_TYPE_DVI_SINGLE_LINK;
                break;
        }

        case SIGNAL_TYPE_DVI_DUAL_LINK: {
                sink_caps.transaction_type = DDC_TRANSACTION_TYPE_I2C;
                sink_caps.signal = SIGNAL_TYPE_DVI_DUAL_LINK;
                break;
        }

        case SIGNAL_TYPE_LVDS: {
                sink_caps.transaction_type = DDC_TRANSACTION_TYPE_I2C;
                sink_caps.signal = SIGNAL_TYPE_LVDS;
                break;
        }

        case SIGNAL_TYPE_EDP: {
                sink_caps.transaction_type =
                        DDC_TRANSACTION_TYPE_I2C_OVER_AUX;
                sink_caps.signal = SIGNAL_TYPE_EDP;
                break;
        }

        case SIGNAL_TYPE_DISPLAY_PORT: {
                sink_caps.transaction_type =
                        DDC_TRANSACTION_TYPE_I2C_OVER_AUX;
                sink_caps.signal = SIGNAL_TYPE_VIRTUAL;
                break;
        }

        default:
                DC_ERROR("Invalid connector type! signal:%d\n",
                        link->connector_signal);
                return;
        }

        sink_init_data.link = link;
        sink_init_data.sink_signal = sink_caps.signal;

        sink = dc_sink_create(&sink_init_data);
        if (!sink) {
                DC_ERROR("Failed to create sink!\n");
                return;
        }

        /* dc_sink_create returns a new reference */
        link->local_sink = sink;

        edid_status = dm_helpers_read_local_edid(
                        link->ctx,
                        link,
                        sink);

        if (edid_status != EDID_OK)
                DC_ERROR("Failed to read EDID");

}

static int dm_resume(void *handle)
{
        struct amdgpu_device *adev = handle;
        struct drm_device *ddev = adev->ddev;
        struct amdgpu_display_manager *dm = &adev->dm;
        struct amdgpu_dm_connector *aconnector;
        struct drm_connector *connector;
        struct drm_connector_list_iter iter;
        struct drm_crtc *crtc;
        struct drm_crtc_state *new_crtc_state;
        struct dm_crtc_state *dm_new_crtc_state;
        struct drm_plane *plane;
        struct drm_plane_state *new_plane_state;
        struct dm_plane_state *dm_new_plane_state;
        struct dm_atomic_state *dm_state = to_dm_atomic_state(dm->atomic_obj.state);
        enum dc_connection_type new_connection_type = dc_connection_none;
        int i, r;

        /* Recreate dc_state - DC invalidates it when setting power state to S3. */
        dc_release_state(dm_state->context);
        dm_state->context = dc_create_state(dm->dc);
        /* TODO: Remove dc_state->dccg, use dc->dccg directly. */
        dc_resource_state_construct(dm->dc, dm_state->context);

        /* Before powering on DC we need to re-initialize DMUB. */
        r = dm_dmub_hw_init(adev);
        if (r)
                DRM_ERROR("DMUB interface failed to initialize: status=%d\n", r);

        /* power on hardware */
        dc_set_power_state(dm->dc, DC_ACPI_CM_POWER_STATE_D0);

        /* program HPD filter */
        dc_resume(dm->dc);

        /*
         * early enable HPD Rx IRQ, should be done before set mode as short
         * pulse interrupts are used for MST
         */
        amdgpu_dm_irq_resume_early(adev);

        /* On resume we need to rewrite the MSTM control bits to enable MST*/
        s3_handle_mst(ddev, false);

        /* Do detection*/
        drm_connector_list_iter_begin(ddev, &iter);
        drm_for_each_connector_iter(connector, &iter) {
                aconnector = to_amdgpu_dm_connector(connector);

                /*
                 * this is the case when traversing through already created
                 * MST connectors, should be skipped
                 */
                if (aconnector->mst_port)
                        continue;

                mutex_lock(&aconnector->hpd_lock);
                if (!dc_link_detect_sink(aconnector->dc_link, &new_connection_type))
                        DRM_ERROR("KMS: Failed to detect connector\n");

                if (aconnector->base.force && new_connection_type == dc_connection_none)
                        emulated_link_detect(aconnector->dc_link);
                else
                        dc_link_detect(aconnector->dc_link, DETECT_REASON_HPD);

                if (aconnector->fake_enable && aconnector->dc_link->local_sink)
                        aconnector->fake_enable = false;

                if (aconnector->dc_sink)
                        dc_sink_release(aconnector->dc_sink);
                aconnector->dc_sink = NULL;
                amdgpu_dm_update_connector_after_detect(aconnector);
                mutex_unlock(&aconnector->hpd_lock);
        }
        drm_connector_list_iter_end(&iter);

        /* Force mode set in atomic commit */
        for_each_new_crtc_in_state(dm->cached_state, crtc, new_crtc_state, i)
                new_crtc_state->active_changed = true;

        /*
         * atomic_check is expected to create the dc states. We need to release
         * them here, since they were duplicated as part of the suspend
         * procedure.
         */
        for_each_new_crtc_in_state(dm->cached_state, crtc, new_crtc_state, i) {
                dm_new_crtc_state = to_dm_crtc_state(new_crtc_state);
                if (dm_new_crtc_state->stream) {
                        WARN_ON(kref_read(&dm_new_crtc_state->stream->refcount) > 1);
                        dc_stream_release(dm_new_crtc_state->stream);
                        dm_new_crtc_state->stream = NULL;
                }
        }

        for_each_new_plane_in_state(dm->cached_state, plane, new_plane_state, i) {
                dm_new_plane_state = to_dm_plane_state(new_plane_state);
                if (dm_new_plane_state->dc_state) {
                        WARN_ON(kref_read(&dm_new_plane_state->dc_state->refcount) > 1);
                        dc_plane_state_release(dm_new_plane_state->dc_state);
                        dm_new_plane_state->dc_state = NULL;
                }
        }

        drm_atomic_helper_resume(ddev, dm->cached_state);

        dm->cached_state = NULL;

        amdgpu_dm_irq_resume_late(adev);

        amdgpu_dm_smu_write_watermarks_table(adev);

        return 0;
}

/**
 * DOC: DM Lifecycle
 *
 * DM (and consequently DC) is registered in the amdgpu base driver as a IP
 * block. When CONFIG_DRM_AMD_DC is enabled, the DM device IP block is added to
 * the base driver's device list to be initialized and torn down accordingly.
 *
 * The functions to do so are provided as hooks in &struct amd_ip_funcs.
 */

static const struct amd_ip_funcs amdgpu_dm_funcs = {
        .name = "dm",
        .early_init = dm_early_init,
        .late_init = dm_late_init,
        .sw_init = dm_sw_init,
        .sw_fini = dm_sw_fini,
        .hw_init = dm_hw_init,
        .hw_fini = dm_hw_fini,
        .suspend = dm_suspend,
        .resume = dm_resume,
        .is_idle = dm_is_idle,
        .wait_for_idle = dm_wait_for_idle,
        .check_soft_reset = dm_check_soft_reset,
        .soft_reset = dm_soft_reset,
        .set_clockgating_state = dm_set_clockgating_state,
        .set_powergating_state = dm_set_powergating_state,
};

const struct amdgpu_ip_block_version dm_ip_block =
{
        .type = AMD_IP_BLOCK_TYPE_DCE,
        .major = 1,
        .minor = 0,
        .rev = 0,
        .funcs = &amdgpu_dm_funcs,
};


/**
 * DOC: atomic
 *
 * *WIP*
 */

static const struct drm_mode_config_funcs amdgpu_dm_mode_funcs = {
        .fb_create = amdgpu_display_user_framebuffer_create,
        .output_poll_changed = drm_fb_helper_output_poll_changed,
        .atomic_check = amdgpu_dm_atomic_check,
        .atomic_commit = amdgpu_dm_atomic_commit,
};

static struct drm_mode_config_helper_funcs amdgpu_dm_mode_config_helperfuncs = {
        .atomic_commit_tail = amdgpu_dm_atomic_commit_tail
};

static void
amdgpu_dm_update_connector_after_detect(struct amdgpu_dm_connector *aconnector)
{
        struct drm_connector *connector = &aconnector->base;
        struct drm_device *dev = connector->dev;
        struct dc_sink *sink;

        /* MST handled by drm_mst framework */
        if (aconnector->mst_mgr.mst_state == true)
                return;


        sink = aconnector->dc_link->local_sink;
        if (sink)
                dc_sink_retain(sink);

        /*
         * Edid mgmt connector gets first update only in mode_valid hook and then
         * the connector sink is set to either fake or physical sink depends on link status.
         * Skip if already done during boot.
         */
        if (aconnector->base.force != DRM_FORCE_UNSPECIFIED
                        && aconnector->dc_em_sink) {

                /*
                 * For S3 resume with headless use eml_sink to fake stream
                 * because on resume connector->sink is set to NULL
                 */
                mutex_lock(&dev->mode_config.mutex);

                if (sink) {
                        if (aconnector->dc_sink) {
                                amdgpu_dm_update_freesync_caps(connector, NULL);
                                /*
                                 * retain and release below are used to
                                 * bump up refcount for sink because the link doesn't point
                                 * to it anymore after disconnect, so on next crtc to connector
                                 * reshuffle by UMD we will get into unwanted dc_sink release
                                 */
                                dc_sink_release(aconnector->dc_sink);
                        }
                        aconnector->dc_sink = sink;
                        dc_sink_retain(aconnector->dc_sink);
                        amdgpu_dm_update_freesync_caps(connector,
                                        aconnector->edid);
                } else {
                        amdgpu_dm_update_freesync_caps(connector, NULL);
                        if (!aconnector->dc_sink) {
                                aconnector->dc_sink = aconnector->dc_em_sink;
                                dc_sink_retain(aconnector->dc_sink);
                        }
                }

                mutex_unlock(&dev->mode_config.mutex);

                if (sink)
                        dc_sink_release(sink);
                return;
        }

        /*
         * TODO: temporary guard to look for proper fix
         * if this sink is MST sink, we should not do anything
         */
        if (sink && sink->sink_signal == SIGNAL_TYPE_DISPLAY_PORT_MST) {
                dc_sink_release(sink);
                return;
        }

        if (aconnector->dc_sink == sink) {
                /*
                 * We got a DP short pulse (Link Loss, DP CTS, etc...).
                 * Do nothing!!
                 */
                DRM_DEBUG_DRIVER("DCHPD: connector_id=%d: dc_sink didn't change.\n",
                                aconnector->connector_id);
                if (sink)
                        dc_sink_release(sink);
                return;
        }

        DRM_DEBUG_DRIVER("DCHPD: connector_id=%d: Old sink=%p New sink=%p\n",
                aconnector->connector_id, aconnector->dc_sink, sink);

        mutex_lock(&dev->mode_config.mutex);

        /*
         * 1. Update status of the drm connector
         * 2. Send an event and let userspace tell us what to do
         */
        if (sink) {
                /*
                 * TODO: check if we still need the S3 mode update workaround.
                 * If yes, put it here.
                 */
                if (aconnector->dc_sink)
                        amdgpu_dm_update_freesync_caps(connector, NULL);

                aconnector->dc_sink = sink;
                dc_sink_retain(aconnector->dc_sink);
                if (sink->dc_edid.length == 0) {
                        aconnector->edid = NULL;
                        drm_dp_cec_unset_edid(&aconnector->dm_dp_aux.aux);
                } else {
                        aconnector->edid =
                                (struct edid *) sink->dc_edid.raw_edid;


                        drm_connector_update_edid_property(connector,
                                        aconnector->edid);
                        drm_dp_cec_set_edid(&aconnector->dm_dp_aux.aux,
                                            aconnector->edid);
                }
                amdgpu_dm_update_freesync_caps(connector, aconnector->edid);

        } else {
                drm_dp_cec_unset_edid(&aconnector->dm_dp_aux.aux);
                amdgpu_dm_update_freesync_caps(connector, NULL);
                drm_connector_update_edid_property(connector, NULL);
                aconnector->num_modes = 0;
                dc_sink_release(aconnector->dc_sink);
                aconnector->dc_sink = NULL;
                aconnector->edid = NULL;
#ifdef CONFIG_DRM_AMD_DC_HDCP
                /* Set CP to DESIRED if it was ENABLED, so we can re-enable it again on hotplug */
                if (connector->state->content_protection == DRM_MODE_CONTENT_PROTECTION_ENABLED)
                        connector->state->content_protection = DRM_MODE_CONTENT_PROTECTION_DESIRED;
#endif
        }

        mutex_unlock(&dev->mode_config.mutex);

        if (sink)
                dc_sink_release(sink);
}

static void handle_hpd_irq(void *param)
{
        struct amdgpu_dm_connector *aconnector = (struct amdgpu_dm_connector *)param;
        struct drm_connector *connector = &aconnector->base;
        struct drm_device *dev = connector->dev;
        enum dc_connection_type new_connection_type = dc_connection_none;
#ifdef CONFIG_DRM_AMD_DC_HDCP
        struct amdgpu_device *adev = dev->dev_private;
#endif

        /*
         * In case of failure or MST no need to update connector status or notify the OS
         * since (for MST case) MST does this in its own context.
         */
        mutex_lock(&aconnector->hpd_lock);

#ifdef CONFIG_DRM_AMD_DC_HDCP
        if (adev->dm.hdcp_workqueue)
                hdcp_reset_display(adev->dm.hdcp_workqueue, aconnector->dc_link->link_index);
#endif
        if (aconnector->fake_enable)
                aconnector->fake_enable = false;

        if (!dc_link_detect_sink(aconnector->dc_link, &new_connection_type))
                DRM_ERROR("KMS: Failed to detect connector\n");

        if (aconnector->base.force && new_connection_type == dc_connection_none) {
                emulated_link_detect(aconnector->dc_link);


                drm_modeset_lock_all(dev);
                dm_restore_drm_connector_state(dev, connector);
                drm_modeset_unlock_all(dev);

                if (aconnector->base.force == DRM_FORCE_UNSPECIFIED)
                        drm_kms_helper_hotplug_event(dev);

        } else if (dc_link_detect(aconnector->dc_link, DETECT_REASON_HPD)) {
                amdgpu_dm_update_connector_after_detect(aconnector);


                drm_modeset_lock_all(dev);
                dm_restore_drm_connector_state(dev, connector);
                drm_modeset_unlock_all(dev);

                if (aconnector->base.force == DRM_FORCE_UNSPECIFIED)
                        drm_kms_helper_hotplug_event(dev);
        }
        mutex_unlock(&aconnector->hpd_lock);

}

static void dm_handle_hpd_rx_irq(struct amdgpu_dm_connector *aconnector)
{
        uint8_t esi[DP_PSR_ERROR_STATUS - DP_SINK_COUNT_ESI] = { 0 };
        uint8_t dret;
        bool new_irq_handled = false;
        int dpcd_addr;
        int dpcd_bytes_to_read;

        const int max_process_count = 30;
        int process_count = 0;

        const struct dc_link_status *link_status = dc_link_get_status(aconnector->dc_link);

        if (link_status->dpcd_caps->dpcd_rev.raw < 0x12) {
                dpcd_bytes_to_read = DP_LANE0_1_STATUS - DP_SINK_COUNT;
                /* DPCD 0x200 - 0x201 for downstream IRQ */
                dpcd_addr = DP_SINK_COUNT;
        } else {
                dpcd_bytes_to_read = DP_PSR_ERROR_STATUS - DP_SINK_COUNT_ESI;
                /* DPCD 0x2002 - 0x2005 for downstream IRQ */
                dpcd_addr = DP_SINK_COUNT_ESI;
        }

        dret = drm_dp_dpcd_read(
                &aconnector->dm_dp_aux.aux,
                dpcd_addr,
                esi,
                dpcd_bytes_to_read);

        while (dret == dpcd_bytes_to_read &&
                process_count < max_process_count) {
                uint8_t retry;
                dret = 0;

                process_count++;

                DRM_DEBUG_DRIVER("ESI %02x %02x %02x\n", esi[0], esi[1], esi[2]);
                /* handle HPD short pulse irq */
                if (aconnector->mst_mgr.mst_state)
                        drm_dp_mst_hpd_irq(
                                &aconnector->mst_mgr,
                                esi,
                                &new_irq_handled);

                if (new_irq_handled) {
                        /* ACK at DPCD to notify down stream */
                        const int ack_dpcd_bytes_to_write =
                                dpcd_bytes_to_read - 1;

                        for (retry = 0; retry < 3; retry++) {
                                uint8_t wret;

                                wret = drm_dp_dpcd_write(
                                        &aconnector->dm_dp_aux.aux,
                                        dpcd_addr + 1,
                                        &esi[1],
                                        ack_dpcd_bytes_to_write);
                                if (wret == ack_dpcd_bytes_to_write)
                                        break;
                        }

                        /* check if there is new irq to be handled */
                        dret = drm_dp_dpcd_read(
                                &aconnector->dm_dp_aux.aux,
                                dpcd_addr,
                                esi,
                                dpcd_bytes_to_read);

                        new_irq_handled = false;
                } else {
                        break;
                }
        }

        if (process_count == max_process_count)
                DRM_DEBUG_DRIVER("Loop exceeded max iterations\n");
}

static void handle_hpd_rx_irq(void *param)
{
        struct amdgpu_dm_connector *aconnector = (struct amdgpu_dm_connector *)param;
        struct drm_connector *connector = &aconnector->base;
        struct drm_device *dev = connector->dev;
        struct dc_link *dc_link = aconnector->dc_link;
        bool is_mst_root_connector = aconnector->mst_mgr.mst_state;
        enum dc_connection_type new_connection_type = dc_connection_none;
#ifdef CONFIG_DRM_AMD_DC_HDCP
        union hpd_irq_data hpd_irq_data;
        struct amdgpu_device *adev = dev->dev_private;

        memset(&hpd_irq_data, 0, sizeof(hpd_irq_data));
#endif

        /*
         * TODO:Temporary add mutex to protect hpd interrupt not have a gpio
         * conflict, after implement i2c helper, this mutex should be
         * retired.
         */
        if (dc_link->type != dc_connection_mst_branch)
                mutex_lock(&aconnector->hpd_lock);


#ifdef CONFIG_DRM_AMD_DC_HDCP
        if (dc_link_handle_hpd_rx_irq(dc_link, &hpd_irq_data, NULL) &&
#else
        if (dc_link_handle_hpd_rx_irq(dc_link, NULL, NULL) &&
#endif
                        !is_mst_root_connector) {
                /* Downstream Port status changed. */
                if (!dc_link_detect_sink(dc_link, &new_connection_type))
                        DRM_ERROR("KMS: Failed to detect connector\n");

                if (aconnector->base.force && new_connection_type == dc_connection_none) {
                        emulated_link_detect(dc_link);

                        if (aconnector->fake_enable)
                                aconnector->fake_enable = false;

                        amdgpu_dm_update_connector_after_detect(aconnector);


                        drm_modeset_lock_all(dev);
                        dm_restore_drm_connector_state(dev, connector);
                        drm_modeset_unlock_all(dev);

                        drm_kms_helper_hotplug_event(dev);
                } else if (dc_link_detect(dc_link, DETECT_REASON_HPDRX)) {

                        if (aconnector->fake_enable)
                                aconnector->fake_enable = false;

                        amdgpu_dm_update_connector_after_detect(aconnector);


                        drm_modeset_lock_all(dev);
                        dm_restore_drm_connector_state(dev, connector);
                        drm_modeset_unlock_all(dev);

                        drm_kms_helper_hotplug_event(dev);
                }
        }
#ifdef CONFIG_DRM_AMD_DC_HDCP
            if (hpd_irq_data.bytes.device_service_irq.bits.CP_IRQ) {
                    if (adev->dm.hdcp_workqueue)
                            hdcp_handle_cpirq(adev->dm.hdcp_workqueue,  aconnector->base.index);
            }
#endif
        if ((dc_link->cur_link_settings.lane_count != LANE_COUNT_UNKNOWN) ||
            (dc_link->type == dc_connection_mst_branch))
                dm_handle_hpd_rx_irq(aconnector);

        if (dc_link->type != dc_connection_mst_branch) {
                drm_dp_cec_irq(&aconnector->dm_dp_aux.aux);
                mutex_unlock(&aconnector->hpd_lock);
        }
}

static void register_hpd_handlers(struct amdgpu_device *adev)
{
        struct drm_device *dev = adev->ddev;
        struct drm_connector *connector;
        struct amdgpu_dm_connector *aconnector;
        const struct dc_link *dc_link;
        struct dc_interrupt_params int_params = {0};

        int_params.requested_polarity = INTERRUPT_POLARITY_DEFAULT;
        int_params.current_polarity = INTERRUPT_POLARITY_DEFAULT;

        list_for_each_entry(connector,
                        &dev->mode_config.connector_list, head) {

                aconnector = to_amdgpu_dm_connector(connector);
                dc_link = aconnector->dc_link;

                if (DC_IRQ_SOURCE_INVALID != dc_link->irq_source_hpd) {
                        int_params.int_context = INTERRUPT_LOW_IRQ_CONTEXT;
                        int_params.irq_source = dc_link->irq_source_hpd;

                        amdgpu_dm_irq_register_interrupt(adev, &int_params,
                                        handle_hpd_irq,
                                        (void *) aconnector);
                }

                if (DC_IRQ_SOURCE_INVALID != dc_link->irq_source_hpd_rx) {

                        /* Also register for DP short pulse (hpd_rx). */
                        int_params.int_context = INTERRUPT_LOW_IRQ_CONTEXT;
                        int_params.irq_source = dc_link->irq_source_hpd_rx;

                        amdgpu_dm_irq_register_interrupt(adev, &int_params,
                                        handle_hpd_rx_irq,
                                        (void *) aconnector);
                }
        }
}

/* Register IRQ sources and initialize IRQ callbacks */
static int dce110_register_irq_handlers(struct amdgpu_device *adev)
{
        struct dc *dc = adev->dm.dc;
        struct common_irq_params *c_irq_params;
        struct dc_interrupt_params int_params = {0};
        int r;
        int i;
        unsigned client_id = AMDGPU_IRQ_CLIENTID_LEGACY;

        if (adev->asic_type >= CHIP_VEGA10)
                client_id = SOC15_IH_CLIENTID_DCE;

        int_params.requested_polarity = INTERRUPT_POLARITY_DEFAULT;
        int_params.current_polarity = INTERRUPT_POLARITY_DEFAULT;

        /*
         * Actions of amdgpu_irq_add_id():
         * 1. Register a set() function with base driver.
         *    Base driver will call set() function to enable/disable an
         *    interrupt in DC hardware.
         * 2. Register amdgpu_dm_irq_handler().
         *    Base driver will call amdgpu_dm_irq_handler() for ALL interrupts
         *    coming from DC hardware.
         *    amdgpu_dm_irq_handler() will re-direct the interrupt to DC
         *    for acknowledging and handling. */

        /* Use VBLANK interrupt */
        for (i = VISLANDS30_IV_SRCID_D1_VERTICAL_INTERRUPT0; i <= VISLANDS30_IV_SRCID_D6_VERTICAL_INTERRUPT0; i++) {
                r = amdgpu_irq_add_id(adev, client_id, i, &adev->crtc_irq);
                if (r) {
                        DRM_ERROR("Failed to add crtc irq id!\n");
                        return r;
                }

                int_params.int_context = INTERRUPT_HIGH_IRQ_CONTEXT;
                int_params.irq_source =
                        dc_interrupt_to_irq_source(dc, i, 0);

                c_irq_params = &adev->dm.vblank_params[int_params.irq_source - DC_IRQ_SOURCE_VBLANK1];

                c_irq_params->adev = adev;
                c_irq_params->irq_src = int_params.irq_source;

                amdgpu_dm_irq_register_interrupt(adev, &int_params,
                                dm_crtc_high_irq, c_irq_params);
        }

        /* Use VUPDATE interrupt */
        for (i = VISLANDS30_IV_SRCID_D1_V_UPDATE_INT; i <= VISLANDS30_IV_SRCID_D6_V_UPDATE_INT; i += 2) {
                r = amdgpu_irq_add_id(adev, client_id, i, &adev->vupdate_irq);
                if (r) {
                        DRM_ERROR("Failed to add vupdate irq id!\n");
                        return r;
                }

                int_params.int_context = INTERRUPT_HIGH_IRQ_CONTEXT;
                int_params.irq_source =
                        dc_interrupt_to_irq_source(dc, i, 0);

                c_irq_params = &adev->dm.vupdate_params[int_params.irq_source - DC_IRQ_SOURCE_VUPDATE1];

                c_irq_params->adev = adev;
                c_irq_params->irq_src = int_params.irq_source;

                amdgpu_dm_irq_register_interrupt(adev, &int_params,
                                dm_vupdate_high_irq, c_irq_params);
        }

        /* Use GRPH_PFLIP interrupt */
        for (i = VISLANDS30_IV_SRCID_D1_GRPH_PFLIP;
                        i <= VISLANDS30_IV_SRCID_D6_GRPH_PFLIP; i += 2) {
                r = amdgpu_irq_add_id(adev, client_id, i, &adev->pageflip_irq);
                if (r) {
                        DRM_ERROR("Failed to add page flip irq id!\n");
                        return r;
                }

                int_params.int_context = INTERRUPT_HIGH_IRQ_CONTEXT;
                int_params.irq_source =
                        dc_interrupt_to_irq_source(dc, i, 0);

                c_irq_params = &adev->dm.pflip_params[int_params.irq_source - DC_IRQ_SOURCE_PFLIP_FIRST];

                c_irq_params->adev = adev;
                c_irq_params->irq_src = int_params.irq_source;

                amdgpu_dm_irq_register_interrupt(adev, &int_params,
                                dm_pflip_high_irq, c_irq_params);

        }

        /* HPD */
        r = amdgpu_irq_add_id(adev, client_id,
                        VISLANDS30_IV_SRCID_HOTPLUG_DETECT_A, &adev->hpd_irq);
        if (r) {
                DRM_ERROR("Failed to add hpd irq id!\n");
                return r;
        }

        register_hpd_handlers(adev);

        return 0;
}

#if defined(CONFIG_DRM_AMD_DC_DCN)
/* Register IRQ sources and initialize IRQ callbacks */
static int dcn10_register_irq_handlers(struct amdgpu_device *adev)
{
        struct dc *dc = adev->dm.dc;
        struct common_irq_params *c_irq_params;
        struct dc_interrupt_params int_params = {0};
        int r;
        int i;

        int_params.requested_polarity = INTERRUPT_POLARITY_DEFAULT;
        int_params.current_polarity = INTERRUPT_POLARITY_DEFAULT;

        /*
         * Actions of amdgpu_irq_add_id():
         * 1. Register a set() function with base driver.
         *    Base driver will call set() function to enable/disable an
         *    interrupt in DC hardware.
         * 2. Register amdgpu_dm_irq_handler().
         *    Base driver will call amdgpu_dm_irq_handler() for ALL interrupts
         *    coming from DC hardware.
         *    amdgpu_dm_irq_handler() will re-direct the interrupt to DC
         *    for acknowledging and handling.
         */

        /* Use VSTARTUP interrupt */
        for (i = DCN_1_0__SRCID__DC_D1_OTG_VSTARTUP;
                        i <= DCN_1_0__SRCID__DC_D1_OTG_VSTARTUP + adev->mode_info.num_crtc - 1;
                        i++) {
                r = amdgpu_irq_add_id(adev, SOC15_IH_CLIENTID_DCE, i, &adev->crtc_irq);

                if (r) {
                        DRM_ERROR("Failed to add crtc irq id!\n");
                        return r;
                }

                int_params.int_context = INTERRUPT_HIGH_IRQ_CONTEXT;
                int_params.irq_source =
                        dc_interrupt_to_irq_source(dc, i, 0);

                c_irq_params = &adev->dm.vblank_params[int_params.irq_source - DC_IRQ_SOURCE_VBLANK1];

                c_irq_params->adev = adev;
                c_irq_params->irq_src = int_params.irq_source;

                amdgpu_dm_irq_register_interrupt(adev, &int_params,
                                dm_dcn_crtc_high_irq, c_irq_params);
        }

        /* Use GRPH_PFLIP interrupt */
        for (i = DCN_1_0__SRCID__HUBP0_FLIP_INTERRUPT;
                        i <= DCN_1_0__SRCID__HUBP0_FLIP_INTERRUPT + adev->mode_info.num_crtc - 1;
                        i++) {
                r = amdgpu_irq_add_id(adev, SOC15_IH_CLIENTID_DCE, i, &adev->pageflip_irq);
                if (r) {
                        DRM_ERROR("Failed to add page flip irq id!\n");
                        return r;
                }

                int_params.int_context = INTERRUPT_HIGH_IRQ_CONTEXT;
                int_params.irq_source =
                        dc_interrupt_to_irq_source(dc, i, 0);

                c_irq_params = &adev->dm.pflip_params[int_params.irq_source - DC_IRQ_SOURCE_PFLIP_FIRST];

                c_irq_params->adev = adev;
                c_irq_params->irq_src = int_params.irq_source;

                amdgpu_dm_irq_register_interrupt(adev, &int_params,
                                dm_pflip_high_irq, c_irq_params);

        }

        /* HPD */
        r = amdgpu_irq_add_id(adev, SOC15_IH_CLIENTID_DCE, DCN_1_0__SRCID__DC_HPD1_INT,
                        &adev->hpd_irq);
        if (r) {
                DRM_ERROR("Failed to add hpd irq id!\n");
                return r;
        }

        register_hpd_handlers(adev);

        return 0;
}
#endif

/*
 * Acquires the lock for the atomic state object and returns
 * the new atomic state.
 *
 * This should only be called during atomic check.
 */
static int dm_atomic_get_state(struct drm_atomic_state *state,
                               struct dm_atomic_state **dm_state)
{
        struct drm_device *dev = state->dev;
        struct amdgpu_device *adev = dev->dev_private;
        struct amdgpu_display_manager *dm = &adev->dm;
        struct drm_private_state *priv_state;

        if (*dm_state)
                return 0;

        priv_state = drm_atomic_get_private_obj_state(state, &dm->atomic_obj);
        if (IS_ERR(priv_state))
                return PTR_ERR(priv_state);

        *dm_state = to_dm_atomic_state(priv_state);

        return 0;
}

struct dm_atomic_state *
dm_atomic_get_new_state(struct drm_atomic_state *state)
{
        struct drm_device *dev = state->dev;
        struct amdgpu_device *adev = dev->dev_private;
        struct amdgpu_display_manager *dm = &adev->dm;
        struct drm_private_obj *obj;
        struct drm_private_state *new_obj_state;
        int i;

        for_each_new_private_obj_in_state(state, obj, new_obj_state, i) {
                if (obj->funcs == dm->atomic_obj.funcs)
                        return to_dm_atomic_state(new_obj_state);
        }

        return NULL;
}

struct dm_atomic_state *
dm_atomic_get_old_state(struct drm_atomic_state *state)
{
        struct drm_device *dev = state->dev;
        struct amdgpu_device *adev = dev->dev_private;
        struct amdgpu_display_manager *dm = &adev->dm;
        struct drm_private_obj *obj;
        struct drm_private_state *old_obj_state;
        int i;

        for_each_old_private_obj_in_state(state, obj, old_obj_state, i) {
                if (obj->funcs == dm->atomic_obj.funcs)
                        return to_dm_atomic_state(old_obj_state);
        }

        return NULL;
}

static struct drm_private_state *
dm_atomic_duplicate_state(struct drm_private_obj *obj)
{
        struct dm_atomic_state *old_state, *new_state;

        new_state = kzalloc(sizeof(*new_state), GFP_KERNEL);
        if (!new_state)
                return NULL;

        __drm_atomic_helper_private_obj_duplicate_state(obj, &new_state->base);

        old_state = to_dm_atomic_state(obj->state);

        if (old_state && old_state->context)
                new_state->context = dc_copy_state(old_state->context);

        if (!new_state->context) {
                kfree(new_state);
                return NULL;
        }

        return &new_state->base;
}

static void dm_atomic_destroy_state(struct drm_private_obj *obj,
                                    struct drm_private_state *state)
{
        struct dm_atomic_state *dm_state = to_dm_atomic_state(state);

        if (dm_state && dm_state->context)
                dc_release_state(dm_state->context);

        kfree(dm_state);
}

static struct drm_private_state_funcs dm_atomic_state_funcs = {
        .atomic_duplicate_state = dm_atomic_duplicate_state,
        .atomic_destroy_state = dm_atomic_destroy_state,
};

static int amdgpu_dm_mode_config_init(struct amdgpu_device *adev)
{
        struct dm_atomic_state *state;
        int r;

        adev->mode_info.mode_config_initialized = true;

        adev->ddev->mode_config.funcs = (void *)&amdgpu_dm_mode_funcs;
        adev->ddev->mode_config.helper_private = &amdgpu_dm_mode_config_helperfuncs;

        adev->ddev->mode_config.max_width = 16384;
        adev->ddev->mode_config.max_height = 16384;

        adev->ddev->mode_config.preferred_depth = 24;
        adev->ddev->mode_config.prefer_shadow = 1;
        /* indicates support for immediate flip */
        adev->ddev->mode_config.async_page_flip = true;

        adev->ddev->mode_config.fb_base = adev->gmc.aper_base;

        state = kzalloc(sizeof(*state), GFP_KERNEL);
        if (!state)
                return -ENOMEM;

        state->context = dc_create_state(adev->dm.dc);
        if (!state->context) {
                kfree(state);
                return -ENOMEM;
        }

        dc_resource_state_copy_construct_current(adev->dm.dc, state->context);

        drm_atomic_private_obj_init(adev->ddev,
                                    &adev->dm.atomic_obj,
                                    &state->base,
                                    &dm_atomic_state_funcs);

        r = amdgpu_display_modeset_create_props(adev);
        if (r)
                return r;

        r = amdgpu_dm_audio_init(adev);
        if (r)
                return r;

        return 0;
}

#define AMDGPU_DM_DEFAULT_MIN_BACKLIGHT 12
#define AMDGPU_DM_DEFAULT_MAX_BACKLIGHT 255

#if defined(CONFIG_BACKLIGHT_CLASS_DEVICE) ||\
        defined(CONFIG_BACKLIGHT_CLASS_DEVICE_MODULE)

static void amdgpu_dm_update_backlight_caps(struct amdgpu_display_manager *dm)
{
#if defined(CONFIG_ACPI)
        struct amdgpu_dm_backlight_caps caps;

        if (dm->backlight_caps.caps_valid)
                return;

        amdgpu_acpi_get_backlight_caps(dm->adev, &caps);
        if (caps.caps_valid) {
                dm->backlight_caps.min_input_signal = caps.min_input_signal;
                dm->backlight_caps.max_input_signal = caps.max_input_signal;
                dm->backlight_caps.caps_valid = true;
        } else {
                dm->backlight_caps.min_input_signal =
                                AMDGPU_DM_DEFAULT_MIN_BACKLIGHT;
                dm->backlight_caps.max_input_signal =
                                AMDGPU_DM_DEFAULT_MAX_BACKLIGHT;
        }
#else
        dm->backlight_caps.min_input_signal = AMDGPU_DM_DEFAULT_MIN_BACKLIGHT;
        dm->backlight_caps.max_input_signal = AMDGPU_DM_DEFAULT_MAX_BACKLIGHT;
#endif
}

static int amdgpu_dm_backlight_update_status(struct backlight_device *bd)
{
        struct amdgpu_display_manager *dm = bl_get_data(bd);
        struct amdgpu_dm_backlight_caps caps;
        uint32_t brightness = bd->props.brightness;

        amdgpu_dm_update_backlight_caps(dm);
        caps = dm->backlight_caps;
        /*
         * The brightness input is in the range 0-255
         * It needs to be rescaled to be between the
         * requested min and max input signal
         *
         * It also needs to be scaled up by 0x101 to
         * match the DC interface which has a range of
         * 0 to 0xffff
         */
        brightness =
                brightness
                * 0x101
                * (caps.max_input_signal - caps.min_input_signal)
                / AMDGPU_MAX_BL_LEVEL
                + caps.min_input_signal * 0x101;

        if (dc_link_set_backlight_level(dm->backlight_link,
                        brightness, 0))
                return 0;
        else
                return 1;
}

static int amdgpu_dm_backlight_get_brightness(struct backlight_device *bd)
{
        struct amdgpu_display_manager *dm = bl_get_data(bd);
        int ret = dc_link_get_backlight_level(dm->backlight_link);

        if (ret == DC_ERROR_UNEXPECTED)
                return bd->props.brightness;
        return ret;
}

static const struct backlight_ops amdgpu_dm_backlight_ops = {
        .options = BL_CORE_SUSPENDRESUME,
        .get_brightness = amdgpu_dm_backlight_get_brightness,
        .update_status  = amdgpu_dm_backlight_update_status,
};

static void
amdgpu_dm_register_backlight_device(struct amdgpu_display_manager *dm)
{
        char bl_name[16];
        struct backlight_properties props = { 0 };

        amdgpu_dm_update_backlight_caps(dm);

        props.max_brightness = AMDGPU_MAX_BL_LEVEL;
        props.brightness = AMDGPU_MAX_BL_LEVEL;
        props.type = BACKLIGHT_RAW;

        snprintf(bl_name, sizeof(bl_name), "amdgpu_bl%d",
                        dm->adev->ddev->primary->index);

        dm->backlight_dev = backlight_device_register(bl_name,
                        dm->adev->ddev->dev,
                        dm,
                        &amdgpu_dm_backlight_ops,
                        &props);

        if (IS_ERR(dm->backlight_dev))
                DRM_ERROR("DM: Backlight registration failed!\n");
        else
                DRM_DEBUG_DRIVER("DM: Registered Backlight device: %s\n", bl_name);
}

#endif

static int initialize_plane(struct amdgpu_display_manager *dm,
                            struct amdgpu_mode_info *mode_info, int plane_id,
                            enum drm_plane_type plane_type,
                            const struct dc_plane_cap *plane_cap)
{
        struct drm_plane *plane;
        unsigned long possible_crtcs;
        int ret = 0;

        plane = kzalloc(sizeof(struct drm_plane), GFP_KERNEL);
        if (!plane) {
                DRM_ERROR("KMS: Failed to allocate plane\n");
                return -ENOMEM;
        }
        plane->type = plane_type;

        /*
         * HACK: IGT tests expect that the primary plane for a CRTC
         * can only have one possible CRTC. Only expose support for
         * any CRTC if they're not going to be used as a primary plane
         * for a CRTC - like overlay or underlay planes.
         */
        possible_crtcs = 1 << plane_id;
        if (plane_id >= dm->dc->caps.max_streams)
                possible_crtcs = 0xff;

        ret = amdgpu_dm_plane_init(dm, plane, possible_crtcs, plane_cap);

        if (ret) {
                DRM_ERROR("KMS: Failed to initialize plane\n");
                kfree(plane);
                return ret;
        }

        if (mode_info)
                mode_info->planes[plane_id] = plane;

        return ret;
}


static void register_backlight_device(struct amdgpu_display_manager *dm,
                                      struct dc_link *link)
{
#if defined(CONFIG_BACKLIGHT_CLASS_DEVICE) ||\
        defined(CONFIG_BACKLIGHT_CLASS_DEVICE_MODULE)

        if ((link->connector_signal & (SIGNAL_TYPE_EDP | SIGNAL_TYPE_LVDS)) &&
            link->type != dc_connection_none) {
                /*
                 * Event if registration failed, we should continue with
                 * DM initialization because not having a backlight control
                 * is better then a black screen.
                 */
                amdgpu_dm_register_backlight_device(dm);

                if (dm->backlight_dev)
                        dm->backlight_link = link;
        }
#endif
}


/*
 * In this architecture, the association
 * connector -> encoder -> crtc
 * id not really requried. The crtc and connector will hold the
 * display_index as an abstraction to use with DAL component
 *
 * Returns 0 on success
 */
static int amdgpu_dm_initialize_drm_device(struct amdgpu_device *adev)
{
        struct amdgpu_display_manager *dm = &adev->dm;
        int32_t i;
        struct amdgpu_dm_connector *aconnector = NULL;
        struct amdgpu_encoder *aencoder = NULL;
        struct amdgpu_mode_info *mode_info = &adev->mode_info;
        uint32_t link_cnt;
        int32_t primary_planes;
        enum dc_connection_type new_connection_type = dc_connection_none;
        const struct dc_plane_cap *plane;

        link_cnt = dm->dc->caps.max_links;
        if (amdgpu_dm_mode_config_init(dm->adev)) {
                DRM_ERROR("DM: Failed to initialize mode config\n");
                return -EINVAL;
        }

        /* There is one primary plane per CRTC */
        primary_planes = dm->dc->caps.max_streams;
        ASSERT(primary_planes <= AMDGPU_MAX_PLANES);

        /*
         * Initialize primary planes, implicit planes for legacy IOCTLS.
         * Order is reversed to match iteration order in atomic check.
         */
        for (i = (primary_planes - 1); i >= 0; i--) {
                plane = &dm->dc->caps.planes[i];

                if (initialize_plane(dm, mode_info, i,
                                     DRM_PLANE_TYPE_PRIMARY, plane)) {
                        DRM_ERROR("KMS: Failed to initialize primary plane\n");
                        goto fail;
                }
        }

        /*
         * Initialize overlay planes, index starting after primary planes.
         * These planes have a higher DRM index than the primary planes since
         * they should be considered as having a higher z-order.
         * Order is reversed to match iteration order in atomic check.
         *
         * Only support DCN for now, and only expose one so we don't encourage
         * userspace to use up all the pipes.
         */
        for (i = 0; i < dm->dc->caps.max_planes; ++i) {
                struct dc_plane_cap *plane = &dm->dc->caps.planes[i];

                if (plane->type != DC_PLANE_TYPE_DCN_UNIVERSAL)
                        continue;

                if (!plane->blends_with_above || !plane->blends_with_below)
                        continue;

                if (!plane->pixel_format_support.argb8888)
                        continue;

                if (initialize_plane(dm, NULL, primary_planes + i,
                                     DRM_PLANE_TYPE_OVERLAY, plane)) {
                        DRM_ERROR("KMS: Failed to initialize overlay plane\n");
                        goto fail;
                }

                /* Only create one overlay plane. */
                break;
        }

        for (i = 0; i < dm->dc->caps.max_streams; i++)
                if (amdgpu_dm_crtc_init(dm, mode_info->planes[i], i)) {
                        DRM_ERROR("KMS: Failed to initialize crtc\n");
                        goto fail;
                }

        dm->display_indexes_num = dm->dc->caps.max_streams;

        /* loops over all connectors on the board */
        for (i = 0; i < link_cnt; i++) {
                struct dc_link *link = NULL;

                if (i > AMDGPU_DM_MAX_DISPLAY_INDEX) {
                        DRM_ERROR(
                                "KMS: Cannot support more than %d display indexes\n",
                                        AMDGPU_DM_MAX_DISPLAY_INDEX);
                        continue;
                }

                aconnector = kzalloc(sizeof(*aconnector), GFP_KERNEL);
                if (!aconnector)
                        goto fail;

                aencoder = kzalloc(sizeof(*aencoder), GFP_KERNEL);
                if (!aencoder)
                        goto fail;

                if (amdgpu_dm_encoder_init(dm->ddev, aencoder, i)) {
                        DRM_ERROR("KMS: Failed to initialize encoder\n");
                        goto fail;
                }

                if (amdgpu_dm_connector_init(dm, aconnector, i, aencoder)) {
                        DRM_ERROR("KMS: Failed to initialize connector\n");
                        goto fail;
                }

                link = dc_get_link_at_index(dm->dc, i);

                if (!dc_link_detect_sink(link, &new_connection_type))
                        DRM_ERROR("KMS: Failed to detect connector\n");

                if (aconnector->base.force && new_connection_type == dc_connection_none) {
                        emulated_link_detect(link);
                        amdgpu_dm_update_connector_after_detect(aconnector);

                } else if (dc_link_detect(link, DETECT_REASON_BOOT)) {
                        amdgpu_dm_update_connector_after_detect(aconnector);
                        register_backlight_device(dm, link);
                        if (amdgpu_dc_feature_mask & DC_PSR_MASK)
                                amdgpu_dm_set_psr_caps(link);
                }


        }

        /* Software is initialized. Now we can register interrupt handlers. */
        switch (adev->asic_type) {
        case CHIP_BONAIRE:
        case CHIP_HAWAII:
        case CHIP_KAVERI:
        case CHIP_KABINI:
        case CHIP_MULLINS:
        case CHIP_TONGA:
        case CHIP_FIJI:
        case CHIP_CARRIZO:
        case CHIP_STONEY:
        case CHIP_POLARIS11:
        case CHIP_POLARIS10:
        case CHIP_POLARIS12:
        case CHIP_VEGAM:
        case CHIP_VEGA10:
        case CHIP_VEGA12:
        case CHIP_VEGA20:
                if (dce110_register_irq_handlers(dm->adev)) {
                        DRM_ERROR("DM: Failed to initialize IRQ\n");
                        goto fail;
                }
                break;
#if defined(CONFIG_DRM_AMD_DC_DCN)
        case CHIP_RAVEN:
        case CHIP_NAVI12:
        case CHIP_NAVI10:
        case CHIP_NAVI14:
        case CHIP_RENOIR:
                if (dcn10_register_irq_handlers(dm->adev)) {
                        DRM_ERROR("DM: Failed to initialize IRQ\n");
                        goto fail;
                }
                break;
#endif
        default:
                DRM_ERROR("Unsupported ASIC type: 0x%X\n", adev->asic_type);
                goto fail;
        }

        if (adev->asic_type != CHIP_CARRIZO && adev->asic_type != CHIP_STONEY)
                dm->dc->debug.disable_stutter = amdgpu_pp_feature_mask & PP_STUTTER_MODE ? false : true;

        return 0;
fail:
        kfree(aencoder);
        kfree(aconnector);

        return -EINVAL;
}

static void amdgpu_dm_destroy_drm_device(struct amdgpu_display_manager *dm)
{
        drm_mode_config_cleanup(dm->ddev);
        drm_atomic_private_obj_fini(&dm->atomic_obj);
        return;
}

/******************************************************************************
 * amdgpu_display_funcs functions
 *****************************************************************************/

/*
 * dm_bandwidth_update - program display watermarks
 *
 * @adev: amdgpu_device pointer
 *
 * Calculate and program the display watermarks and line buffer allocation.
 */
static void dm_bandwidth_update(struct amdgpu_device *adev)
{
        /* TODO: implement later */
}

static const struct amdgpu_display_funcs dm_display_funcs = {
        .bandwidth_update = dm_bandwidth_update, /* called unconditionally */
        .vblank_get_counter = dm_vblank_get_counter,/* called unconditionally */
        .backlight_set_level = NULL, /* never called for DC */
        .backlight_get_level = NULL, /* never called for DC */
        .hpd_sense = NULL,/* called unconditionally */
        .hpd_set_polarity = NULL, /* called unconditionally */
        .hpd_get_gpio_reg = NULL, /* VBIOS parsing. DAL does it. */
        .page_flip_get_scanoutpos =
                dm_crtc_get_scanoutpos,/* called unconditionally */
        .add_encoder = NULL, /* VBIOS parsing. DAL does it. */
        .add_connector = NULL, /* VBIOS parsing. DAL does it. */
};

#if defined(CONFIG_DEBUG_KERNEL_DC)

static ssize_t s3_debug_store(struct device *device,
                              struct device_attribute *attr,
                              const char *buf,
                              size_t count)
{
        int ret;
        int s3_state;
        struct drm_device *drm_dev = dev_get_drvdata(device);
        struct amdgpu_device *adev = drm_dev->dev_private;

        ret = kstrtoint(buf, 0, &s3_state);

        if (ret == 0) {
                if (s3_state) {
                        dm_resume(adev);
                        drm_kms_helper_hotplug_event(adev->ddev);
                } else
                        dm_suspend(adev);
        }

        return ret == 0 ? count : 0;
}

DEVICE_ATTR_WO(s3_debug);

#endif

static int dm_early_init(void *handle)
{
        struct amdgpu_device *adev = (struct amdgpu_device *)handle;

        switch (adev->asic_type) {
        case CHIP_BONAIRE:
        case CHIP_HAWAII:
                adev->mode_info.num_crtc = 6;
                adev->mode_info.num_hpd = 6;
                adev->mode_info.num_dig = 6;
                break;
        case CHIP_KAVERI:
                adev->mode_info.num_crtc = 4;
                adev->mode_info.num_hpd = 6;
                adev->mode_info.num_dig = 7;
                break;
        case CHIP_KABINI:
        case CHIP_MULLINS:
                adev->mode_info.num_crtc = 2;
                adev->mode_info.num_hpd = 6;
                adev->mode_info.num_dig = 6;
                break;
        case CHIP_FIJI:
        case CHIP_TONGA:
                adev->mode_info.num_crtc = 6;
                adev->mode_info.num_hpd = 6;
                adev->mode_info.num_dig = 7;
                break;
        case CHIP_CARRIZO:
                adev->mode_info.num_crtc = 3;
                adev->mode_info.num_hpd = 6;
                adev->mode_info.num_dig = 9;
                break;
        case CHIP_STONEY:
                adev->mode_info.num_crtc = 2;
                adev->mode_info.num_hpd = 6;
                adev->mode_info.num_dig = 9;
                break;
        case CHIP_POLARIS11:
        case CHIP_POLARIS12:
                adev->mode_info.num_crtc = 5;
                adev->mode_info.num_hpd = 5;
                adev->mode_info.num_dig = 5;
                break;
        case CHIP_POLARIS10:
        case CHIP_VEGAM:
                adev->mode_info.num_crtc = 6;
                adev->mode_info.num_hpd = 6;
                adev->mode_info.num_dig = 6;
                break;
        case CHIP_VEGA10:
        case CHIP_VEGA12:
        case CHIP_VEGA20:
                adev->mode_info.num_crtc = 6;
                adev->mode_info.num_hpd = 6;
                adev->mode_info.num_dig = 6;
                break;
#if defined(CONFIG_DRM_AMD_DC_DCN)
        case CHIP_RAVEN:
                adev->mode_info.num_crtc = 4;
                adev->mode_info.num_hpd = 4;
                adev->mode_info.num_dig = 4;
                break;
#endif
        case CHIP_NAVI10:
        case CHIP_NAVI12:
                adev->mode_info.num_crtc = 6;
                adev->mode_info.num_hpd = 6;
                adev->mode_info.num_dig = 6;
                break;
        case CHIP_NAVI14:
                adev->mode_info.num_crtc = 5;
                adev->mode_info.num_hpd = 5;
                adev->mode_info.num_dig = 5;
                break;
        case CHIP_RENOIR:
                adev->mode_info.num_crtc = 4;
                adev->mode_info.num_hpd = 4;
                adev->mode_info.num_dig = 4;
                break;
        default:
                DRM_ERROR("Unsupported ASIC type: 0x%X\n", adev->asic_type);
                return -EINVAL;
        }

        amdgpu_dm_set_irq_funcs(adev);

        if (adev->mode_info.funcs == NULL)
                adev->mode_info.funcs = &dm_display_funcs;

        /*
         * Note: Do NOT change adev->audio_endpt_rreg and
         * adev->audio_endpt_wreg because they are initialised in
         * amdgpu_device_init()
         */
#if defined(CONFIG_DEBUG_KERNEL_DC)
        device_create_file(
                adev->ddev->dev,
                &dev_attr_s3_debug);
#endif

        return 0;
}

static bool modeset_required(struct drm_crtc_state *crtc_state,
                             struct dc_stream_state *new_stream,
                             struct dc_stream_state *old_stream)
{
        if (!drm_atomic_crtc_needs_modeset(crtc_state))
                return false;

        if (!crtc_state->enable)
                return false;

        return crtc_state->active;
}

static bool modereset_required(struct drm_crtc_state *crtc_state)
{
        if (!drm_atomic_crtc_needs_modeset(crtc_state))
                return false;

        return !crtc_state->enable || !crtc_state->active;
}

static void amdgpu_dm_encoder_destroy(struct drm_encoder *encoder)
{
        drm_encoder_cleanup(encoder);
        kfree(encoder);
}

static const struct drm_encoder_funcs amdgpu_dm_encoder_funcs = {
        .destroy = amdgpu_dm_encoder_destroy,
};


static int fill_dc_scaling_info(const struct drm_plane_state *state,
                                struct dc_scaling_info *scaling_info)
{
        int scale_w, scale_h;

        memset(scaling_info, 0, sizeof(*scaling_info));

        /* Source is fixed 16.16 but we ignore mantissa for now... */
        scaling_info->src_rect.x = state->src_x >> 16;
        scaling_info->src_rect.y = state->src_y >> 16;

        scaling_info->src_rect.width = state->src_w >> 16;
        if (scaling_info->src_rect.width == 0)
                return -EINVAL;

        scaling_info->src_rect.height = state->src_h >> 16;
        if (scaling_info->src_rect.height == 0)
                return -EINVAL;

        scaling_info->dst_rect.x = state->crtc_x;
        scaling_info->dst_rect.y = state->crtc_y;

        if (state->crtc_w == 0)
                return -EINVAL;

        scaling_info->dst_rect.width = state->crtc_w;

        if (state->crtc_h == 0)
                return -EINVAL;

        scaling_info->dst_rect.height = state->crtc_h;

        /* DRM doesn't specify clipping on destination output. */
        scaling_info->clip_rect = scaling_info->dst_rect;

        /* TODO: Validate scaling per-format with DC plane caps */
        scale_w = scaling_info->dst_rect.width * 1000 /
                  scaling_info->src_rect.width;

        if (scale_w < 250 || scale_w > 16000)
                return -EINVAL;

        scale_h = scaling_info->dst_rect.height * 1000 /
                  scaling_info->src_rect.height;

        if (scale_h < 250 || scale_h > 16000)
                return -EINVAL;

        /*
         * The "scaling_quality" can be ignored for now, quality = 0 has DC
         * assume reasonable defaults based on the format.
         */

        return 0;
}

static int get_fb_info(const struct amdgpu_framebuffer *amdgpu_fb,
                       uint64_t *tiling_flags)
{
        struct amdgpu_bo *rbo = gem_to_amdgpu_bo(amdgpu_fb->base.obj[0]);
        int r = amdgpu_bo_reserve(rbo, false);

        if (unlikely(r)) {
                /* Don't show error message when returning -ERESTARTSYS */
                if (r != -ERESTARTSYS)
                        DRM_ERROR("Unable to reserve buffer: %d\n", r);
                return r;
        }

        if (tiling_flags)
                amdgpu_bo_get_tiling_flags(rbo, tiling_flags);

        amdgpu_bo_unreserve(rbo);

        return r;
}

static inline uint64_t get_dcc_address(uint64_t address, uint64_t tiling_flags)
{
        uint32_t offset = AMDGPU_TILING_GET(tiling_flags, DCC_OFFSET_256B);

        return offset ? (address + offset * 256) : 0;
}

static int
fill_plane_dcc_attributes(struct amdgpu_device *adev,
                          const struct amdgpu_framebuffer *afb,
                          const enum surface_pixel_format format,
                          const enum dc_rotation_angle rotation,
                          const struct plane_size *plane_size,
                          const union dc_tiling_info *tiling_info,
                          const uint64_t info,
                          struct dc_plane_dcc_param *dcc,
                          struct dc_plane_address *address)
{
        struct dc *dc = adev->dm.dc;
        struct dc_dcc_surface_param input;
        struct dc_surface_dcc_cap output;
        uint32_t offset = AMDGPU_TILING_GET(info, DCC_OFFSET_256B);
        uint32_t i64b = AMDGPU_TILING_GET(info, DCC_INDEPENDENT_64B) != 0;
        uint64_t dcc_address;

        memset(&input, 0, sizeof(input));
        memset(&output, 0, sizeof(output));

        if (!offset)
                return 0;

        if (format >= SURFACE_PIXEL_FORMAT_VIDEO_BEGIN)
                return 0;

        if (!dc->cap_funcs.get_dcc_compression_cap)
                return -EINVAL;

        input.format = format;
        input.surface_size.width = plane_size->surface_size.width;
        input.surface_size.height = plane_size->surface_size.height;
        input.swizzle_mode = tiling_info->gfx9.swizzle;

        if (rotation == ROTATION_ANGLE_0 || rotation == ROTATION_ANGLE_180)
                input.scan = SCAN_DIRECTION_HORIZONTAL;
        else if (rotation == ROTATION_ANGLE_90 || rotation == ROTATION_ANGLE_270)
                input.scan = SCAN_DIRECTION_VERTICAL;

        if (!dc->cap_funcs.get_dcc_compression_cap(dc, &input, &output))
                return -EINVAL;

        if (!output.capable)
                return -EINVAL;

        if (i64b == 0 && output.grph.rgb.independent_64b_blks != 0)
                return -EINVAL;

        dcc->enable = 1;
        dcc->meta_pitch =
                AMDGPU_TILING_GET(info, DCC_PITCH_MAX) + 1;
        dcc->independent_64b_blks = i64b;

        dcc_address = get_dcc_address(afb->address, info);
        address->grph.meta_addr.low_part = lower_32_bits(dcc_address);
        address->grph.meta_addr.high_part = upper_32_bits(dcc_address);

        return 0;
}

static int
fill_plane_buffer_attributes(struct amdgpu_device *adev,
                             const struct amdgpu_framebuffer *afb,
                             const enum surface_pixel_format format,
                             const enum dc_rotation_angle rotation,
                             const uint64_t tiling_flags,
                             union dc_tiling_info *tiling_info,
                             struct plane_size *plane_size,
                             struct dc_plane_dcc_param *dcc,
                             struct dc_plane_address *address)
{
        const struct drm_framebuffer *fb = &afb->base;
        int ret;

        memset(tiling_info, 0, sizeof(*tiling_info));
        memset(plane_size, 0, sizeof(*plane_size));
        memset(dcc, 0, sizeof(*dcc));
        memset(address, 0, sizeof(*address));

        if (format < SURFACE_PIXEL_FORMAT_VIDEO_BEGIN) {
                plane_size->surface_size.x = 0;
                plane_size->surface_size.y = 0;
                plane_size->surface_size.width = fb->width;
                plane_size->surface_size.height = fb->height;
                plane_size->surface_pitch =
                        fb->pitches[0] / fb->format->cpp[0];

                address->type = PLN_ADDR_TYPE_GRAPHICS;
                address->grph.addr.low_part = lower_32_bits(afb->address);
                address->grph.addr.high_part = upper_32_bits(afb->address);
        } else if (format < SURFACE_PIXEL_FORMAT_INVALID) {
                uint64_t chroma_addr = afb->address + fb->offsets[1];

                plane_size->surface_size.x = 0;
                plane_size->surface_size.y = 0;
                plane_size->surface_size.width = fb->width;
                plane_size->surface_size.height = fb->height;
                plane_size->surface_pitch =
                        fb->pitches[0] / fb->format->cpp[0];

                plane_size->chroma_size.x = 0;
                plane_size->chroma_size.y = 0;
                /* TODO: set these based on surface format */
                plane_size->chroma_size.width = fb->width / 2;
                plane_size->chroma_size.height = fb->height / 2;

                plane_size->chroma_pitch =
                        fb->pitches[1] / fb->format->cpp[1];

                address->type = PLN_ADDR_TYPE_VIDEO_PROGRESSIVE;
                address->video_progressive.luma_addr.low_part =
                        lower_32_bits(afb->address);
                address->video_progressive.luma_addr.high_part =
                        upper_32_bits(afb->address);
                address->video_progressive.chroma_addr.low_part =
                        lower_32_bits(chroma_addr);
                address->video_progressive.chroma_addr.high_part =
                        upper_32_bits(chroma_addr);
        }

        /* Fill GFX8 params */
        if (AMDGPU_TILING_GET(tiling_flags, ARRAY_MODE) == DC_ARRAY_2D_TILED_THIN1) {
                unsigned int bankw, bankh, mtaspect, tile_split, num_banks;

                bankw = AMDGPU_TILING_GET(tiling_flags, BANK_WIDTH);
                bankh = AMDGPU_TILING_GET(tiling_flags, BANK_HEIGHT);
                mtaspect = AMDGPU_TILING_GET(tiling_flags, MACRO_TILE_ASPECT);
                tile_split = AMDGPU_TILING_GET(tiling_flags, TILE_SPLIT);
                num_banks = AMDGPU_TILING_GET(tiling_flags, NUM_BANKS);

                /* XXX fix me for VI */
                tiling_info->gfx8.num_banks = num_banks;
                tiling_info->gfx8.array_mode =
                                DC_ARRAY_2D_TILED_THIN1;
                tiling_info->gfx8.tile_split = tile_split;
                tiling_info->gfx8.bank_width = bankw;
                tiling_info->gfx8.bank_height = bankh;
                tiling_info->gfx8.tile_aspect = mtaspect;
                tiling_info->gfx8.tile_mode =
                                DC_ADDR_SURF_MICRO_TILING_DISPLAY;
        } else if (AMDGPU_TILING_GET(tiling_flags, ARRAY_MODE)
                        == DC_ARRAY_1D_TILED_THIN1) {
                tiling_info->gfx8.array_mode = DC_ARRAY_1D_TILED_THIN1;
        }

        tiling_info->gfx8.pipe_config =
                        AMDGPU_TILING_GET(tiling_flags, PIPE_CONFIG);

        if (adev->asic_type == CHIP_VEGA10 ||
            adev->asic_type == CHIP_VEGA12 ||
            adev->asic_type == CHIP_VEGA20 ||
            adev->asic_type == CHIP_NAVI10 ||
            adev->asic_type == CHIP_NAVI14 ||
            adev->asic_type == CHIP_NAVI12 ||
            adev->asic_type == CHIP_RENOIR ||
            adev->asic_type == CHIP_RAVEN) {
                /* Fill GFX9 params */
                tiling_info->gfx9.num_pipes =
                        adev->gfx.config.gb_addr_config_fields.num_pipes;
                tiling_info->gfx9.num_banks =
                        adev->gfx.config.gb_addr_config_fields.num_banks;
                tiling_info->gfx9.pipe_interleave =
                        adev->gfx.config.gb_addr_config_fields.pipe_interleave_size;
                tiling_info->gfx9.num_shader_engines =
                        adev->gfx.config.gb_addr_config_fields.num_se;
                tiling_info->gfx9.max_compressed_frags =
                        adev->gfx.config.gb_addr_config_fields.max_compress_frags;
                tiling_info->gfx9.num_rb_per_se =
                        adev->gfx.config.gb_addr_config_fields.num_rb_per_se;
                tiling_info->gfx9.swizzle =
                        AMDGPU_TILING_GET(tiling_flags, SWIZZLE_MODE);
                tiling_info->gfx9.shaderEnable = 1;

                ret = fill_plane_dcc_attributes(adev, afb, format, rotation,
                                                plane_size, tiling_info,
                                                tiling_flags, dcc, address);
                if (ret)
                        return ret;
        }

        return 0;
}

static void
fill_blending_from_plane_state(const struct drm_plane_state *plane_state,
                               bool *per_pixel_alpha, bool *global_alpha,
                               int *global_alpha_value)
{
        *per_pixel_alpha = false;
        *global_alpha = false;
        *global_alpha_value = 0xff;

        if (plane_state->plane->type != DRM_PLANE_TYPE_OVERLAY)
                return;

        if (plane_state->pixel_blend_mode == DRM_MODE_BLEND_PREMULTI) {
                static const uint32_t alpha_formats[] = {
                        DRM_FORMAT_ARGB8888,
                        DRM_FORMAT_RGBA8888,
                        DRM_FORMAT_ABGR8888,
                };
                uint32_t format = plane_state->fb->format->format;
                unsigned int i;

                for (i = 0; i < ARRAY_SIZE(alpha_formats); ++i) {
                        if (format == alpha_formats[i]) {
                                *per_pixel_alpha = true;
                                break;
                        }
                }
        }

        if (plane_state->alpha < 0xffff) {
                *global_alpha = true;
                *global_alpha_value = plane_state->alpha >> 8;
        }
}

static int
fill_plane_color_attributes(const struct drm_plane_state *plane_state,
                            const enum surface_pixel_format format,
                            enum dc_color_space *color_space)
{
        bool full_range;

        *color_space = COLOR_SPACE_SRGB;

        /* DRM color properties only affect non-RGB formats. */
        if (format < SURFACE_PIXEL_FORMAT_VIDEO_BEGIN)
                return 0;

        full_range = (plane_state->color_range == DRM_COLOR_YCBCR_FULL_RANGE);

        switch (plane_state->color_encoding) {
        case DRM_COLOR_YCBCR_BT601:
                if (full_range)
                        *color_space = COLOR_SPACE_YCBCR601;
                else
                        *color_space = COLOR_SPACE_YCBCR601_LIMITED;
                break;

        case DRM_COLOR_YCBCR_BT709:
                if (full_range)
                        *color_space = COLOR_SPACE_YCBCR709;
                else
                        *color_space = COLOR_SPACE_YCBCR709_LIMITED;
                break;

        case DRM_COLOR_YCBCR_BT2020:
                if (full_range)
                        *color_space = COLOR_SPACE_2020_YCBCR;
                else
                        return -EINVAL;
                break;

        default:
                return -EINVAL;
        }

        return 0;
}

static int
fill_dc_plane_info_and_addr(struct amdgpu_device *adev,
                            const struct drm_plane_state *plane_state,
                            const uint64_t tiling_flags,
                            struct dc_plane_info *plane_info,
                            struct dc_plane_address *address)
{
        const struct drm_framebuffer *fb = plane_state->fb;
        const struct amdgpu_framebuffer *afb =
                to_amdgpu_framebuffer(plane_state->fb);
        struct drm_format_name_buf format_name;
        int ret;

        memset(plane_info, 0, sizeof(*plane_info));

        switch (fb->format->format) {
        case DRM_FORMAT_C8:
                plane_info->format =
                        SURFACE_PIXEL_FORMAT_GRPH_PALETA_256_COLORS;
                break;
        case DRM_FORMAT_RGB565:
                plane_info->format = SURFACE_PIXEL_FORMAT_GRPH_RGB565;
                break;
        case DRM_FORMAT_XRGB8888:
        case DRM_FORMAT_ARGB8888:
                plane_info->format = SURFACE_PIXEL_FORMAT_GRPH_ARGB8888;
                break;
        case DRM_FORMAT_XRGB2101010:
        case DRM_FORMAT_ARGB2101010:
                plane_info->format = SURFACE_PIXEL_FORMAT_GRPH_ARGB2101010;
                break;
        case DRM_FORMAT_XBGR2101010:
        case DRM_FORMAT_ABGR2101010:
                plane_info->format = SURFACE_PIXEL_FORMAT_GRPH_ABGR2101010;
                break;
        case DRM_FORMAT_XBGR8888:
        case DRM_FORMAT_ABGR8888:
                plane_info->format = SURFACE_PIXEL_FORMAT_GRPH_ABGR8888;
                break;
        case DRM_FORMAT_NV21:
                plane_info->format = SURFACE_PIXEL_FORMAT_VIDEO_420_YCbCr;
                break;
        case DRM_FORMAT_NV12:
                plane_info->format = SURFACE_PIXEL_FORMAT_VIDEO_420_YCrCb;
                break;
        default:
                DRM_ERROR(
                        "Unsupported screen format %s\n",
                        drm_get_format_name(fb->format->format, &format_name));
                return -EINVAL;
        }

        switch (plane_state->rotation & DRM_MODE_ROTATE_MASK) {
        case DRM_MODE_ROTATE_0:
                plane_info->rotation = ROTATION_ANGLE_0;
                break;
        case DRM_MODE_ROTATE_90:
                plane_info->rotation = ROTATION_ANGLE_90;
                break;
        case DRM_MODE_ROTATE_180:
                plane_info->rotation = ROTATION_ANGLE_180;
                break;
        case DRM_MODE_ROTATE_270:
                plane_info->rotation = ROTATION_ANGLE_270;
                break;
        default:
                plane_info->rotation = ROTATION_ANGLE_0;
                break;
        }

        plane_info->visible = true;
        plane_info->stereo_format = PLANE_STEREO_FORMAT_NONE;

        plane_info->layer_index = 0;

        ret = fill_plane_color_attributes(plane_state, plane_info->format,
                                          &plane_info->color_space);
        if (ret)
                return ret;

        ret = fill_plane_buffer_attributes(adev, afb, plane_info->format,
                                           plane_info->rotation, tiling_flags,
                                           &plane_info->tiling_info,
                                           &plane_info->plane_size,
                                           &plane_info->dcc, address);
        if (ret)
                return ret;

        fill_blending_from_plane_state(
                plane_state, &plane_info->per_pixel_alpha,
                &plane_info->global_alpha, &plane_info->global_alpha_value);

        return 0;
}

static int fill_dc_plane_attributes(struct amdgpu_device *adev,
                                    struct dc_plane_state *dc_plane_state,
                                    struct drm_plane_state *plane_state,
                                    struct drm_crtc_state *crtc_state)
{
        struct dm_crtc_state *dm_crtc_state = to_dm_crtc_state(crtc_state);
        const struct amdgpu_framebuffer *amdgpu_fb =
                to_amdgpu_framebuffer(plane_state->fb);
        struct dc_scaling_info scaling_info;
        struct dc_plane_info plane_info;
        uint64_t tiling_flags;
        int ret;

        ret = fill_dc_scaling_info(plane_state, &scaling_info);
        if (ret)
                return ret;

        dc_plane_state->src_rect = scaling_info.src_rect;
        dc_plane_state->dst_rect = scaling_info.dst_rect;
        dc_plane_state->clip_rect = scaling_info.clip_rect;
        dc_plane_state->scaling_quality = scaling_info.scaling_quality;

        ret = get_fb_info(amdgpu_fb, &tiling_flags);
        if (ret)
                return ret;

        ret = fill_dc_plane_info_and_addr(adev, plane_state, tiling_flags,
                                          &plane_info,
                                          &dc_plane_state->address);
        if (ret)
                return ret;

        dc_plane_state->format = plane_info.format;
        dc_plane_state->color_space = plane_info.color_space;
        dc_plane_state->format = plane_info.format;
        dc_plane_state->plane_size = plane_info.plane_size;
        dc_plane_state->rotation = plane_info.rotation;
        dc_plane_state->horizontal_mirror = plane_info.horizontal_mirror;
        dc_plane_state->stereo_format = plane_info.stereo_format;
        dc_plane_state->tiling_info = plane_info.tiling_info;
        dc_plane_state->visible = plane_info.visible;
        dc_plane_state->per_pixel_alpha = plane_info.per_pixel_alpha;
        dc_plane_state->global_alpha = plane_info.global_alpha;
        dc_plane_state->global_alpha_value = plane_info.global_alpha_value;
        dc_plane_state->dcc = plane_info.dcc;
        dc_plane_state->layer_index = plane_info.layer_index; // Always returns 0

        /*
         * Always set input transfer function, since plane state is refreshed
         * every time.
         */
        ret = amdgpu_dm_update_plane_color_mgmt(dm_crtc_state, dc_plane_state);
        if (ret)
                return ret;

        return 0;
}

static void update_stream_scaling_settings(const struct drm_display_mode *mode,
                                           const struct dm_connector_state *dm_state,
                                           struct dc_stream_state *stream)
{
        enum amdgpu_rmx_type rmx_type;

        struct rect src = { 0 }; /* viewport in composition space*/
        struct rect dst = { 0 }; /* stream addressable area */

        /* no mode. nothing to be done */
        if (!mode)
                return;

        /* Full screen scaling by default */
        src.width = mode->hdisplay;
        src.height = mode->vdisplay;
        dst.width = stream->timing.h_addressable;
        dst.height = stream->timing.v_addressable;

        if (dm_state) {
                rmx_type = dm_state->scaling;
                if (rmx_type == RMX_ASPECT || rmx_type == RMX_OFF) {
                        if (src.width * dst.height <
                                        src.height * dst.width) {
                                /* height needs less upscaling/more downscaling */
                                dst.width = src.width *
                                                dst.height / src.height;
                        } else {
                                /* width needs less upscaling/more downscaling */
                                dst.height = src.height *
                                                dst.width / src.width;
                        }
                } else if (rmx_type == RMX_CENTER) {
                        dst = src;
                }

                dst.x = (stream->timing.h_addressable - dst.width) / 2;
                dst.y = (stream->timing.v_addressable - dst.height) / 2;

                if (dm_state->underscan_enable) {
                        dst.x += dm_state->underscan_hborder / 2;
                        dst.y += dm_state->underscan_vborder / 2;
                        dst.width -= dm_state->underscan_hborder;
                        dst.height -= dm_state->underscan_vborder;
                }
        }

        stream->src = src;
        stream->dst = dst;

        DRM_DEBUG_DRIVER("Destination Rectangle x:%d  y:%d  width:%d  height:%d\n",
                        dst.x, dst.y, dst.width, dst.height);

}

static enum dc_color_depth
convert_color_depth_from_display_info(const struct drm_connector *connector,
                                      const struct drm_connector_state *state,
                                      bool is_y420)
{
        uint8_t bpc;

        if (is_y420) {
                bpc = 8;

                /* Cap display bpc based on HDMI 2.0 HF-VSDB */
                if (connector->display_info.hdmi.y420_dc_modes & DRM_EDID_YCBCR420_DC_48)
                        bpc = 16;
                else if (connector->display_info.hdmi.y420_dc_modes & DRM_EDID_YCBCR420_DC_36)
                        bpc = 12;
                else if (connector->display_info.hdmi.y420_dc_modes & DRM_EDID_YCBCR420_DC_30)
                        bpc = 10;
        } else {
                bpc = (uint8_t)connector->display_info.bpc;
                /* Assume 8 bpc by default if no bpc is specified. */
                bpc = bpc ? bpc : 8;
        }

        if (!state)
                state = connector->state;

        if (state) {
                /*
                 * Cap display bpc based on the user requested value.
                 *
                 * The value for state->max_bpc may not correctly updated
                 * depending on when the connector gets added to the state
                 * or if this was called outside of atomic check, so it
                 * can't be used directly.
                 */
                bpc = min(bpc, state->max_requested_bpc);

                /* Round down to the nearest even number. */
                bpc = bpc - (bpc & 1);
        }

        switch (bpc) {
        case 0:
                /*
                 * Temporary Work around, DRM doesn't parse color depth for
                 * EDID revision before 1.4
                 * TODO: Fix edid parsing
                 */
                return COLOR_DEPTH_888;
        case 6:
                return COLOR_DEPTH_666;
        case 8:
                return COLOR_DEPTH_888;
        case 10:
                return COLOR_DEPTH_101010;
        case 12:
                return COLOR_DEPTH_121212;
        case 14:
                return COLOR_DEPTH_141414;
        case 16:
                return COLOR_DEPTH_161616;
        default:
                return COLOR_DEPTH_UNDEFINED;
        }
}

static enum dc_aspect_ratio
get_aspect_ratio(const struct drm_display_mode *mode_in)
{
        /* 1-1 mapping, since both enums follow the HDMI spec. */
        return (enum dc_aspect_ratio) mode_in->picture_aspect_ratio;
}

static enum dc_color_space
get_output_color_space(const struct dc_crtc_timing *dc_crtc_timing)
{
        enum dc_color_space color_space = COLOR_SPACE_SRGB;

        switch (dc_crtc_timing->pixel_encoding) {
        case PIXEL_ENCODING_YCBCR422:
        case PIXEL_ENCODING_YCBCR444:
        case PIXEL_ENCODING_YCBCR420:
        {
                /*
                 * 27030khz is the separation point between HDTV and SDTV
                 * according to HDMI spec, we use YCbCr709 and YCbCr601
                 * respectively
                 */
                if (dc_crtc_timing->pix_clk_100hz > 270300) {
                        if (dc_crtc_timing->flags.Y_ONLY)
                                color_space =
                                        COLOR_SPACE_YCBCR709_LIMITED;
                        else
                                color_space = COLOR_SPACE_YCBCR709;
                } else {
                        if (dc_crtc_timing->flags.Y_ONLY)
                                color_space =
                                        COLOR_SPACE_YCBCR601_LIMITED;
                        else
                                color_space = COLOR_SPACE_YCBCR601;
                }

        }
        break;
        case PIXEL_ENCODING_RGB:
                color_space = COLOR_SPACE_SRGB;
                break;

        default:
                WARN_ON(1);
                break;
        }

        return color_space;
}

static bool adjust_colour_depth_from_display_info(
        struct dc_crtc_timing *timing_out,
        const struct drm_display_info *info)
{
        enum dc_color_depth depth = timing_out->display_color_depth;
        int normalized_clk;
        do {
                normalized_clk = timing_out->pix_clk_100hz / 10;
                /* YCbCr 4:2:0 requires additional adjustment of 1/2 */
                if (timing_out->pixel_encoding == PIXEL_ENCODING_YCBCR420)
                        normalized_clk /= 2;
                /* Adjusting pix clock following on HDMI spec based on colour depth */
                switch (depth) {
                case COLOR_DEPTH_888:
                        break;
                case COLOR_DEPTH_101010:
                        normalized_clk = (normalized_clk * 30) / 24;
                        break;
                case COLOR_DEPTH_121212:
                        normalized_clk = (normalized_clk * 36) / 24;
                        break;
                case COLOR_DEPTH_161616:
                        normalized_clk = (normalized_clk * 48) / 24;
                        break;
                default:
                        /* The above depths are the only ones valid for HDMI. */
                        return false;
                }
                if (normalized_clk <= info->max_tmds_clock) {
                        timing_out->display_color_depth = depth;
                        return true;
                }
        } while (--depth > COLOR_DEPTH_666);
        return false;
}

static void fill_stream_properties_from_drm_display_mode(
        struct dc_stream_state *stream,
        const struct drm_display_mode *mode_in,
        const struct drm_connector *connector,
        const struct drm_connector_state *connector_state,
        const struct dc_stream_state *old_stream)
{
        struct dc_crtc_timing *timing_out = &stream->timing;
        const struct drm_display_info *info = &connector->display_info;
        struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(connector);
        struct hdmi_vendor_infoframe hv_frame;
        struct hdmi_avi_infoframe avi_frame;

        memset(&hv_frame, 0, sizeof(hv_frame));
        memset(&avi_frame, 0, sizeof(avi_frame));

        timing_out->h_border_left = 0;
        timing_out->h_border_right = 0;
        timing_out->v_border_top = 0;
        timing_out->v_border_bottom = 0;
        /* TODO: un-hardcode */
        if (drm_mode_is_420_only(info, mode_in)
                        && stream->signal == SIGNAL_TYPE_HDMI_TYPE_A)
                timing_out->pixel_encoding = PIXEL_ENCODING_YCBCR420;
        else if (drm_mode_is_420_also(info, mode_in)
                        && aconnector->force_yuv420_output)
                timing_out->pixel_encoding = PIXEL_ENCODING_YCBCR420;
        else if ((connector->display_info.color_formats & DRM_COLOR_FORMAT_YCRCB444)
                        && stream->signal == SIGNAL_TYPE_HDMI_TYPE_A)
                timing_out->pixel_encoding = PIXEL_ENCODING_YCBCR444;
        else
                timing_out->pixel_encoding = PIXEL_ENCODING_RGB;

        timing_out->timing_3d_format = TIMING_3D_FORMAT_NONE;
        timing_out->display_color_depth = convert_color_depth_from_display_info(
                connector, connector_state,
                (timing_out->pixel_encoding == PIXEL_ENCODING_YCBCR420));
        timing_out->scan_type = SCANNING_TYPE_NODATA;
        timing_out->hdmi_vic = 0;

        if(old_stream) {
                timing_out->vic = old_stream->timing.vic;
                timing_out->flags.HSYNC_POSITIVE_POLARITY = old_stream->timing.flags.HSYNC_POSITIVE_POLARITY;
                timing_out->flags.VSYNC_POSITIVE_POLARITY = old_stream->timing.flags.VSYNC_POSITIVE_POLARITY;
        } else {
                timing_out->vic = drm_match_cea_mode(mode_in);
                if (mode_in->flags & DRM_MODE_FLAG_PHSYNC)
                        timing_out->flags.HSYNC_POSITIVE_POLARITY = 1;
                if (mode_in->flags & DRM_MODE_FLAG_PVSYNC)
                        timing_out->flags.VSYNC_POSITIVE_POLARITY = 1;
        }

        if (stream->signal == SIGNAL_TYPE_HDMI_TYPE_A) {
                drm_hdmi_avi_infoframe_from_display_mode(&avi_frame, (struct drm_connector *)connector, mode_in);
                timing_out->vic = avi_frame.video_code;
                drm_hdmi_vendor_infoframe_from_display_mode(&hv_frame, (struct drm_connector *)connector, mode_in);
                timing_out->hdmi_vic = hv_frame.vic;
        }

        timing_out->h_addressable = mode_in->crtc_hdisplay;
        timing_out->h_total = mode_in->crtc_htotal;
        timing_out->h_sync_width =
                mode_in->crtc_hsync_end - mode_in->crtc_hsync_start;
        timing_out->h_front_porch =
                mode_in->crtc_hsync_start - mode_in->crtc_hdisplay;
        timing_out->v_total = mode_in->crtc_vtotal;
        timing_out->v_addressable = mode_in->crtc_vdisplay;
        timing_out->v_front_porch =
                mode_in->crtc_vsync_start - mode_in->crtc_vdisplay;
        timing_out->v_sync_width =
                mode_in->crtc_vsync_end - mode_in->crtc_vsync_start;
        timing_out->pix_clk_100hz = mode_in->crtc_clock * 10;
        timing_out->aspect_ratio = get_aspect_ratio(mode_in);

        stream->output_color_space = get_output_color_space(timing_out);

        stream->out_transfer_func->type = TF_TYPE_PREDEFINED;
        stream->out_transfer_func->tf = TRANSFER_FUNCTION_SRGB;
        if (stream->signal == SIGNAL_TYPE_HDMI_TYPE_A) {
                if (!adjust_colour_depth_from_display_info(timing_out, info) &&
                    drm_mode_is_420_also(info, mode_in) &&
                    timing_out->pixel_encoding != PIXEL_ENCODING_YCBCR420) {
                        timing_out->pixel_encoding = PIXEL_ENCODING_YCBCR420;
                        adjust_colour_depth_from_display_info(timing_out, info);
                }
        }
}

static void fill_audio_info(struct audio_info *audio_info,
                            const struct drm_connector *drm_connector,
                            const struct dc_sink *dc_sink)
{
        int i = 0;
        int cea_revision = 0;
        const struct dc_edid_caps *edid_caps = &dc_sink->edid_caps;

        audio_info->manufacture_id = edid_caps->manufacturer_id;
        audio_info->product_id = edid_caps->product_id;

        cea_revision = drm_connector->display_info.cea_rev;

        strscpy(audio_info->display_name,
                edid_caps->display_name,
                AUDIO_INFO_DISPLAY_NAME_SIZE_IN_CHARS);

        if (cea_revision >= 3) {
                audio_info->mode_count = edid_caps->audio_mode_count;

                for (i = 0; i < audio_info->mode_count; ++i) {
                        audio_info->modes[i].format_code =
                                        (enum audio_format_code)
                                        (edid_caps->audio_modes[i].format_code);
                        audio_info->modes[i].channel_count =
                                        edid_caps->audio_modes[i].channel_count;
                        audio_info->modes[i].sample_rates.all =
                                        edid_caps->audio_modes[i].sample_rate;
                        audio_info->modes[i].sample_size =
                                        edid_caps->audio_modes[i].sample_size;
                }
        }

        audio_info->flags.all = edid_caps->speaker_flags;

        /* TODO: We only check for the progressive mode, check for interlace mode too */
        if (drm_connector->latency_present[0]) {
                audio_info->video_latency = drm_connector->video_latency[0];
                audio_info->audio_latency = drm_connector->audio_latency[0];
        }

        /* TODO: For DP, video and audio latency should be calculated from DPCD caps */

}

static void
copy_crtc_timing_for_drm_display_mode(const struct drm_display_mode *src_mode,
                                      struct drm_display_mode *dst_mode)
{
        dst_mode->crtc_hdisplay = src_mode->crtc_hdisplay;
        dst_mode->crtc_vdisplay = src_mode->crtc_vdisplay;
        dst_mode->crtc_clock = src_mode->crtc_clock;
        dst_mode->crtc_hblank_start = src_mode->crtc_hblank_start;
        dst_mode->crtc_hblank_end = src_mode->crtc_hblank_end;
        dst_mode->crtc_hsync_start =  src_mode->crtc_hsync_start;
        dst_mode->crtc_hsync_end = src_mode->crtc_hsync_end;
        dst_mode->crtc_htotal = src_mode->crtc_htotal;
        dst_mode->crtc_hskew = src_mode->crtc_hskew;
        dst_mode->crtc_vblank_start = src_mode->crtc_vblank_start;
        dst_mode->crtc_vblank_end = src_mode->crtc_vblank_end;
        dst_mode->crtc_vsync_start = src_mode->crtc_vsync_start;
        dst_mode->crtc_vsync_end = src_mode->crtc_vsync_end;
        dst_mode->crtc_vtotal = src_mode->crtc_vtotal;
}

static void
decide_crtc_timing_for_drm_display_mode(struct drm_display_mode *drm_mode,
                                        const struct drm_display_mode *native_mode,
                                        bool scale_enabled)
{
        if (scale_enabled) {
                copy_crtc_timing_for_drm_display_mode(native_mode, drm_mode);
        } else if (native_mode->clock == drm_mode->clock &&
                        native_mode->htotal == drm_mode->htotal &&
                        native_mode->vtotal == drm_mode->vtotal) {
                copy_crtc_timing_for_drm_display_mode(native_mode, drm_mode);
        } else {
                /* no scaling nor amdgpu inserted, no need to patch */
        }
}

static struct dc_sink *
create_fake_sink(struct amdgpu_dm_connector *aconnector)
{
        struct dc_sink_init_data sink_init_data = { 0 };
        struct dc_sink *sink = NULL;
        sink_init_data.link = aconnector->dc_link;
        sink_init_data.sink_signal = aconnector->dc_link->connector_signal;

        sink = dc_sink_create(&sink_init_data);
        if (!sink) {
                DRM_ERROR("Failed to create sink!\n");
                return NULL;
        }
        sink->sink_signal = SIGNAL_TYPE_VIRTUAL;

        return sink;
}

static void set_multisync_trigger_params(
                struct dc_stream_state *stream)
{
        if (stream->triggered_crtc_reset.enabled) {
                stream->triggered_crtc_reset.event = CRTC_EVENT_VSYNC_RISING;
                stream->triggered_crtc_reset.delay = TRIGGER_DELAY_NEXT_LINE;
        }
}

static void set_master_stream(struct dc_stream_state *stream_set[],
                              int stream_count)
{
        int j, highest_rfr = 0, master_stream = 0;

        for (j = 0;  j < stream_count; j++) {
                if (stream_set[j] && stream_set[j]->triggered_crtc_reset.enabled) {
                        int refresh_rate = 0;

                        refresh_rate = (stream_set[j]->timing.pix_clk_100hz*100)/
                                (stream_set[j]->timing.h_total*stream_set[j]->timing.v_total);
                        if (refresh_rate > highest_rfr) {
                                highest_rfr = refresh_rate;
                                master_stream = j;
                        }
                }
        }
        for (j = 0;  j < stream_count; j++) {
                if (stream_set[j])
                        stream_set[j]->triggered_crtc_reset.event_source = stream_set[master_stream];
        }
}

static void dm_enable_per_frame_crtc_master_sync(struct dc_state *context)
{
        int i = 0;

        if (context->stream_count < 2)
                return;
        for (i = 0; i < context->stream_count ; i++) {
                if (!context->streams[i])
                        continue;
                /*
                 * TODO: add a function to read AMD VSDB bits and set
                 * crtc_sync_master.multi_sync_enabled flag
                 * For now it's set to false
                 */
                set_multisync_trigger_params(context->streams[i]);
        }
        set_master_stream(context->streams, context->stream_count);
}

static struct dc_stream_state *
create_stream_for_sink(struct amdgpu_dm_connector *aconnector,
                       const struct drm_display_mode *drm_mode,
                       const struct dm_connector_state *dm_state,
                       const struct dc_stream_state *old_stream)
{
        struct drm_display_mode *preferred_mode = NULL;
        struct drm_connector *drm_connector;
        const struct drm_connector_state *con_state =
                dm_state ? &dm_state->base : NULL;
        struct dc_stream_state *stream = NULL;
        struct drm_display_mode mode = *drm_mode;
        bool native_mode_found = false;
        bool scale = dm_state ? (dm_state->scaling != RMX_OFF) : false;
        int mode_refresh;
        int preferred_refresh = 0;
#if defined(CONFIG_DRM_AMD_DC_DCN)
        struct dsc_dec_dpcd_caps dsc_caps;
#endif
        uint32_t link_bandwidth_kbps;

        struct dc_sink *sink = NULL;
        if (aconnector == NULL) {
                DRM_ERROR("aconnector is NULL!\n");
                return stream;
        }

        drm_connector = &aconnector->base;

        if (!aconnector->dc_sink) {
                sink = create_fake_sink(aconnector);
                if (!sink)
                        return stream;
        } else {
                sink = aconnector->dc_sink;
                dc_sink_retain(sink);
        }

        stream = dc_create_stream_for_sink(sink);

        if (stream == NULL) {
                DRM_ERROR("Failed to create stream for sink!\n");
                goto finish;
        }

        stream->dm_stream_context = aconnector;

        stream->timing.flags.LTE_340MCSC_SCRAMBLE =
                drm_connector->display_info.hdmi.scdc.scrambling.low_rates;

        list_for_each_entry(preferred_mode, &aconnector->base.modes, head) {
                /* Search for preferred mode */
                if (preferred_mode->type & DRM_MODE_TYPE_PREFERRED) {
                        native_mode_found = true;
                        break;
                }
        }
        if (!native_mode_found)
                preferred_mode = list_first_entry_or_null(
                                &aconnector->base.modes,
                                struct drm_display_mode,
                                head);

        mode_refresh = drm_mode_vrefresh(&mode);

        if (preferred_mode == NULL) {
                /*
                 * This may not be an error, the use case is when we have no
                 * usermode calls to reset and set mode upon hotplug. In this
                 * case, we call set mode ourselves to restore the previous mode
                 * and the modelist may not be filled in in time.
                 */
                DRM_DEBUG_DRIVER("No preferred mode found\n");
        } else {
                decide_crtc_timing_for_drm_display_mode(
                                &mode, preferred_mode,
                                dm_state ? (dm_state->scaling != RMX_OFF) : false);
                preferred_refresh = drm_mode_vrefresh(preferred_mode);
        }

        if (!dm_state)
                drm_mode_set_crtcinfo(&mode, 0);

        /*
        * If scaling is enabled and refresh rate didn't change
        * we copy the vic and polarities of the old timings
        */
        if (!scale || mode_refresh != preferred_refresh)
                fill_stream_properties_from_drm_display_mode(stream,
                        &mode, &aconnector->base, con_state, NULL);
        else
                fill_stream_properties_from_drm_display_mode(stream,
                        &mode, &aconnector->base, con_state, old_stream);

        stream->timing.flags.DSC = 0;

        if (aconnector->dc_link && sink->sink_signal == SIGNAL_TYPE_DISPLAY_PORT) {
#if defined(CONFIG_DRM_AMD_DC_DCN)
                dc_dsc_parse_dsc_dpcd(aconnector->dc_link->ctx->dc,
                                      aconnector->dc_link->dpcd_caps.dsc_caps.dsc_basic_caps.raw,
                                      aconnector->dc_link->dpcd_caps.dsc_caps.dsc_ext_caps.raw,
                                      &dsc_caps);
#endif
                link_bandwidth_kbps = dc_link_bandwidth_kbps(aconnector->dc_link,
                                                             dc_link_get_link_cap(aconnector->dc_link));

#if defined(CONFIG_DRM_AMD_DC_DCN)
                if (dsc_caps.is_dsc_supported)
                        if (dc_dsc_compute_config(aconnector->dc_link->ctx->dc->res_pool->dscs[0],
                                                  &dsc_caps,
                                                  aconnector->dc_link->ctx->dc->debug.dsc_min_slice_height_override,
                                                  link_bandwidth_kbps,
                                                  &stream->timing,
                                                  &stream->timing.dsc_cfg))
                                stream->timing.flags.DSC = 1;
#endif
        }

        update_stream_scaling_settings(&mode, dm_state, stream);

        fill_audio_info(
                &stream->audio_info,
                drm_connector,
                sink);

        update_stream_signal(stream, sink);

        if (stream->signal == SIGNAL_TYPE_HDMI_TYPE_A)
                mod_build_hf_vsif_infopacket(stream, &stream->vsp_infopacket, false, false);
        if (stream->link->psr_feature_enabled)  {
                struct dc  *core_dc = stream->link->ctx->dc;

                if (dc_is_dmcu_initialized(core_dc)) {
                        struct dmcu *dmcu = core_dc->res_pool->dmcu;

                        stream->psr_version = dmcu->dmcu_version.psr_version;
                        mod_build_vsc_infopacket(stream,
                                        &stream->vsc_infopacket,
                                        &stream->use_vsc_sdp_for_colorimetry);
                }
        }
finish:
        dc_sink_release(sink);

        return stream;
}

static void amdgpu_dm_crtc_destroy(struct drm_crtc *crtc)
{
        drm_crtc_cleanup(crtc);
        kfree(crtc);
}

static void dm_crtc_destroy_state(struct drm_crtc *crtc,
                                  struct drm_crtc_state *state)
{
        struct dm_crtc_state *cur = to_dm_crtc_state(state);

        /* TODO Destroy dc_stream objects are stream object is flattened */
        if (cur->stream)
                dc_stream_release(cur->stream);


        __drm_atomic_helper_crtc_destroy_state(state);


        kfree(state);
}

static void dm_crtc_reset_state(struct drm_crtc *crtc)
{
        struct dm_crtc_state *state;

        if (crtc->state)
                dm_crtc_destroy_state(crtc, crtc->state);

        state = kzalloc(sizeof(*state), GFP_KERNEL);
        if (WARN_ON(!state))
                return;

        crtc->state = &state->base;
        crtc->state->crtc = crtc;

}

static struct drm_crtc_state *
dm_crtc_duplicate_state(struct drm_crtc *crtc)
{
        struct dm_crtc_state *state, *cur;

        cur = to_dm_crtc_state(crtc->state);

        if (WARN_ON(!crtc->state))
                return NULL;

        state = kzalloc(sizeof(*state), GFP_KERNEL);
        if (!state)
                return NULL;

        __drm_atomic_helper_crtc_duplicate_state(crtc, &state->base);

        if (cur->stream) {
                state->stream = cur->stream;
                dc_stream_retain(state->stream);
        }

        state->active_planes = cur->active_planes;
        state->interrupts_enabled = cur->interrupts_enabled;
        state->vrr_params = cur->vrr_params;
        state->vrr_infopacket = cur->vrr_infopacket;
        state->abm_level = cur->abm_level;
        state->vrr_supported = cur->vrr_supported;
        state->freesync_config = cur->freesync_config;
        state->crc_src = cur->crc_src;
        state->cm_has_degamma = cur->cm_has_degamma;
        state->cm_is_degamma_srgb = cur->cm_is_degamma_srgb;

        /* TODO Duplicate dc_stream after objects are stream object is flattened */

        return &state->base;
}

static inline int dm_set_vupdate_irq(struct drm_crtc *crtc, bool enable)
{
        enum dc_irq_source irq_source;
        struct amdgpu_crtc *acrtc = to_amdgpu_crtc(crtc);
        struct amdgpu_device *adev = crtc->dev->dev_private;
        int rc;

        /* Do not set vupdate for DCN hardware */
        if (adev->family > AMDGPU_FAMILY_AI)
                return 0;

        irq_source = IRQ_TYPE_VUPDATE + acrtc->otg_inst;

        rc = dc_interrupt_set(adev->dm.dc, irq_source, enable) ? 0 : -EBUSY;

        DRM_DEBUG_DRIVER("crtc %d - vupdate irq %sabling: r=%d\n",
                         acrtc->crtc_id, enable ? "en" : "dis", rc);
        return rc;
}

static inline int dm_set_vblank(struct drm_crtc *crtc, bool enable)
{
        enum dc_irq_source irq_source;
        struct amdgpu_crtc *acrtc = to_amdgpu_crtc(crtc);
        struct amdgpu_device *adev = crtc->dev->dev_private;
        struct dm_crtc_state *acrtc_state = to_dm_crtc_state(crtc->state);
        int rc = 0;

        if (enable) {
                /* vblank irq on -> Only need vupdate irq in vrr mode */
                if (amdgpu_dm_vrr_active(acrtc_state))
                        rc = dm_set_vupdate_irq(crtc, true);
        } else {
                /* vblank irq off -> vupdate irq off */
                rc = dm_set_vupdate_irq(crtc, false);
        }

        if (rc)
                return rc;

        irq_source = IRQ_TYPE_VBLANK + acrtc->otg_inst;
        return dc_interrupt_set(adev->dm.dc, irq_source, enable) ? 0 : -EBUSY;
}

static int dm_enable_vblank(struct drm_crtc *crtc)
{
        return dm_set_vblank(crtc, true);
}

static void dm_disable_vblank(struct drm_crtc *crtc)
{
        dm_set_vblank(crtc, false);
}

/* Implemented only the options currently availible for the driver */
static const struct drm_crtc_funcs amdgpu_dm_crtc_funcs = {
        .reset = dm_crtc_reset_state,
        .destroy = amdgpu_dm_crtc_destroy,
        .gamma_set = drm_atomic_helper_legacy_gamma_set,
        .set_config = drm_atomic_helper_set_config,
        .page_flip = drm_atomic_helper_page_flip,
        .atomic_duplicate_state = dm_crtc_duplicate_state,
        .atomic_destroy_state = dm_crtc_destroy_state,
        .set_crc_source = amdgpu_dm_crtc_set_crc_source,
        .verify_crc_source = amdgpu_dm_crtc_verify_crc_source,
        .get_crc_sources = amdgpu_dm_crtc_get_crc_sources,
        .enable_vblank = dm_enable_vblank,
        .disable_vblank = dm_disable_vblank,
};

static enum drm_connector_status
amdgpu_dm_connector_detect(struct drm_connector *connector, bool force)
{
        bool connected;
        struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(connector);

        /*
         * Notes:
         * 1. This interface is NOT called in context of HPD irq.
         * 2. This interface *is called* in context of user-mode ioctl. Which
         * makes it a bad place for *any* MST-related activity.
         */

        if (aconnector->base.force == DRM_FORCE_UNSPECIFIED &&
            !aconnector->fake_enable)
                connected = (aconnector->dc_sink != NULL);
        else
                connected = (aconnector->base.force == DRM_FORCE_ON);

        return (connected ? connector_status_connected :
                        connector_status_disconnected);
}

int amdgpu_dm_connector_atomic_set_property(struct drm_connector *connector,
                                            struct drm_connector_state *connector_state,
                                            struct drm_property *property,
                                            uint64_t val)
{
        struct drm_device *dev = connector->dev;
        struct amdgpu_device *adev = dev->dev_private;
        struct dm_connector_state *dm_old_state =
                to_dm_connector_state(connector->state);
        struct dm_connector_state *dm_new_state =
                to_dm_connector_state(connector_state);

        int ret = -EINVAL;

        if (property == dev->mode_config.scaling_mode_property) {
                enum amdgpu_rmx_type rmx_type;

                switch (val) {
                case DRM_MODE_SCALE_CENTER:
                        rmx_type = RMX_CENTER;
                        break;
                case DRM_MODE_SCALE_ASPECT:
                        rmx_type = RMX_ASPECT;
                        break;
                case DRM_MODE_SCALE_FULLSCREEN:
                        rmx_type = RMX_FULL;
                        break;
                case DRM_MODE_SCALE_NONE:
                default:
                        rmx_type = RMX_OFF;
                        break;
                }

                if (dm_old_state->scaling == rmx_type)
                        return 0;

                dm_new_state->scaling = rmx_type;
                ret = 0;
        } else if (property == adev->mode_info.underscan_hborder_property) {
                dm_new_state->underscan_hborder = val;
                ret = 0;
        } else if (property == adev->mode_info.underscan_vborder_property) {
                dm_new_state->underscan_vborder = val;
                ret = 0;
        } else if (property == adev->mode_info.underscan_property) {
                dm_new_state->underscan_enable = val;
                ret = 0;
        } else if (property == adev->mode_info.abm_level_property) {
                dm_new_state->abm_level = val;
                ret = 0;
        }

        return ret;
}

int amdgpu_dm_connector_atomic_get_property(struct drm_connector *connector,
                                            const struct drm_connector_state *state,
                                            struct drm_property *property,
                                            uint64_t *val)
{
        struct drm_device *dev = connector->dev;
        struct amdgpu_device *adev = dev->dev_private;
        struct dm_connector_state *dm_state =
                to_dm_connector_state(state);
        int ret = -EINVAL;

        if (property == dev->mode_config.scaling_mode_property) {
                switch (dm_state->scaling) {
                case RMX_CENTER:
                        *val = DRM_MODE_SCALE_CENTER;
                        break;
                case RMX_ASPECT:
                        *val = DRM_MODE_SCALE_ASPECT;
                        break;
                case RMX_FULL:
                        *val = DRM_MODE_SCALE_FULLSCREEN;
                        break;
                case RMX_OFF:
                default:
                        *val = DRM_MODE_SCALE_NONE;
                        break;
                }
                ret = 0;
        } else if (property == adev->mode_info.underscan_hborder_property) {
                *val = dm_state->underscan_hborder;
                ret = 0;
        } else if (property == adev->mode_info.underscan_vborder_property) {
                *val = dm_state->underscan_vborder;
                ret = 0;
        } else if (property == adev->mode_info.underscan_property) {
                *val = dm_state->underscan_enable;
                ret = 0;
        } else if (property == adev->mode_info.abm_level_property) {
                *val = dm_state->abm_level;
                ret = 0;
        }

        return ret;
}

static void amdgpu_dm_connector_unregister(struct drm_connector *connector)
{
        struct amdgpu_dm_connector *amdgpu_dm_connector = to_amdgpu_dm_connector(connector);

        drm_dp_aux_unregister(&amdgpu_dm_connector->dm_dp_aux.aux);
}

static void amdgpu_dm_connector_destroy(struct drm_connector *connector)
{
        struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(connector);
        const struct dc_link *link = aconnector->dc_link;
        struct amdgpu_device *adev = connector->dev->dev_private;
        struct amdgpu_display_manager *dm = &adev->dm;

#if defined(CONFIG_BACKLIGHT_CLASS_DEVICE) ||\
        defined(CONFIG_BACKLIGHT_CLASS_DEVICE_MODULE)

        if ((link->connector_signal & (SIGNAL_TYPE_EDP | SIGNAL_TYPE_LVDS)) &&
            link->type != dc_connection_none &&
            dm->backlight_dev) {
                backlight_device_unregister(dm->backlight_dev);
                dm->backlight_dev = NULL;
        }
#endif

        if (aconnector->dc_em_sink)
                dc_sink_release(aconnector->dc_em_sink);
        aconnector->dc_em_sink = NULL;
        if (aconnector->dc_sink)
                dc_sink_release(aconnector->dc_sink);
        aconnector->dc_sink = NULL;

        drm_dp_cec_unregister_connector(&aconnector->dm_dp_aux.aux);
        drm_connector_unregister(connector);
        drm_connector_cleanup(connector);
        if (aconnector->i2c) {
                i2c_del_adapter(&aconnector->i2c->base);
                kfree(aconnector->i2c);
        }

        kfree(connector);
}

void amdgpu_dm_connector_funcs_reset(struct drm_connector *connector)
{
        struct dm_connector_state *state =
                to_dm_connector_state(connector->state);

        if (connector->state)
                __drm_atomic_helper_connector_destroy_state(connector->state);

        kfree(state);

        state = kzalloc(sizeof(*state), GFP_KERNEL);

        if (state) {
                state->scaling = RMX_OFF;
                state->underscan_enable = false;
                state->underscan_hborder = 0;
                state->underscan_vborder = 0;
                state->base.max_requested_bpc = 8;
                state->vcpi_slots = 0;
                state->pbn = 0;
                if (connector->connector_type == DRM_MODE_CONNECTOR_eDP)
                        state->abm_level = amdgpu_dm_abm_level;

                __drm_atomic_helper_connector_reset(connector, &state->base);
        }
}

struct drm_connector_state *
amdgpu_dm_connector_atomic_duplicate_state(struct drm_connector *connector)
{
        struct dm_connector_state *state =
                to_dm_connector_state(connector->state);

        struct dm_connector_state *new_state =
                        kmemdup(state, sizeof(*state), GFP_KERNEL);

        if (!new_state)
                return NULL;

        __drm_atomic_helper_connector_duplicate_state(connector, &new_state->base);

        new_state->freesync_capable = state->freesync_capable;
        new_state->abm_level = state->abm_level;
        new_state->scaling = state->scaling;
        new_state->underscan_enable = state->underscan_enable;
        new_state->underscan_hborder = state->underscan_hborder;
        new_state->underscan_vborder = state->underscan_vborder;
        new_state->vcpi_slots = state->vcpi_slots;
        new_state->pbn = state->pbn;
        return &new_state->base;
}

static const struct drm_connector_funcs amdgpu_dm_connector_funcs = {
        .reset = amdgpu_dm_connector_funcs_reset,
        .detect = amdgpu_dm_connector_detect,
        .fill_modes = drm_helper_probe_single_connector_modes,
        .destroy = amdgpu_dm_connector_destroy,
        .atomic_duplicate_state = amdgpu_dm_connector_atomic_duplicate_state,
        .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
        .atomic_set_property = amdgpu_dm_connector_atomic_set_property,
        .atomic_get_property = amdgpu_dm_connector_atomic_get_property,
        .early_unregister = amdgpu_dm_connector_unregister
};

static int get_modes(struct drm_connector *connector)
{
        return amdgpu_dm_connector_get_modes(connector);
}

static void create_eml_sink(struct amdgpu_dm_connector *aconnector)
{
        struct dc_sink_init_data init_params = {
                        .link = aconnector->dc_link,
                        .sink_signal = SIGNAL_TYPE_VIRTUAL
        };
        struct edid *edid;

        if (!aconnector->base.edid_blob_ptr) {
                DRM_ERROR("No EDID firmware found on connector: %s ,forcing to OFF!\n",
                                aconnector->base.name);

                aconnector->base.force = DRM_FORCE_OFF;
                aconnector->base.override_edid = false;
                return;
        }

        edid = (struct edid *) aconnector->base.edid_blob_ptr->data;

        aconnector->edid = edid;

        aconnector->dc_em_sink = dc_link_add_remote_sink(
                aconnector->dc_link,
                (uint8_t *)edid,
                (edid->extensions + 1) * EDID_LENGTH,
                &init_params);

        if (aconnector->base.force == DRM_FORCE_ON) {
                aconnector->dc_sink = aconnector->dc_link->local_sink ?
                aconnector->dc_link->local_sink :
                aconnector->dc_em_sink;
                dc_sink_retain(aconnector->dc_sink);
        }
}

static void handle_edid_mgmt(struct amdgpu_dm_connector *aconnector)
{
        struct dc_link *link = (struct dc_link *)aconnector->dc_link;

        /*
         * In case of headless boot with force on for DP managed connector
         * Those settings have to be != 0 to get initial modeset
         */
        if (link->connector_signal == SIGNAL_TYPE_DISPLAY_PORT) {
                link->verified_link_cap.lane_count = LANE_COUNT_FOUR;
                link->verified_link_cap.link_rate = LINK_RATE_HIGH2;
        }


        aconnector->base.override_edid = true;
        create_eml_sink(aconnector);
}

enum drm_mode_status amdgpu_dm_connector_mode_valid(struct drm_connector *connector,
                                   struct drm_display_mode *mode)
{
        int result = MODE_ERROR;
        struct dc_sink *dc_sink;
        struct amdgpu_device *adev = connector->dev->dev_private;
        /* TODO: Unhardcode stream count */
        struct dc_stream_state *stream;
        struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(connector);
        enum dc_status dc_result = DC_OK;

        if ((mode->flags & DRM_MODE_FLAG_INTERLACE) ||
                        (mode->flags & DRM_MODE_FLAG_DBLSCAN))
                return result;

        /*
         * Only run this the first time mode_valid is called to initilialize
         * EDID mgmt
         */
        if (aconnector->base.force != DRM_FORCE_UNSPECIFIED &&
                !aconnector->dc_em_sink)
                handle_edid_mgmt(aconnector);

        dc_sink = to_amdgpu_dm_connector(connector)->dc_sink;

        if (dc_sink == NULL) {
                DRM_ERROR("dc_sink is NULL!\n");
                goto fail;
        }

        stream = create_stream_for_sink(aconnector, mode, NULL, NULL);
        if (stream == NULL) {
                DRM_ERROR("Failed to create stream for sink!\n");
                goto fail;
        }

        dc_result = dc_validate_stream(adev->dm.dc, stream);

        if (dc_result == DC_OK)
                result = MODE_OK;
        else
                DRM_DEBUG_KMS("Mode %dx%d (clk %d) failed DC validation with error %d\n",
                              mode->hdisplay,
                              mode->vdisplay,
                              mode->clock,
                              dc_result);

        dc_stream_release(stream);

fail:
        /* TODO: error handling*/
        return result;
}

static int fill_hdr_info_packet(const struct drm_connector_state *state,
                                struct dc_info_packet *out)
{
        struct hdmi_drm_infoframe frame;
        unsigned char buf[30]; /* 26 + 4 */
        ssize_t len;
        int ret, i;

        memset(out, 0, sizeof(*out));

        if (!state->hdr_output_metadata)
                return 0;

        ret = drm_hdmi_infoframe_set_hdr_metadata(&frame, state);
        if (ret)
                return ret;

        len = hdmi_drm_infoframe_pack_only(&frame, buf, sizeof(buf));
        if (len < 0)
                return (int)len;

        /* Static metadata is a fixed 26 bytes + 4 byte header. */
        if (len != 30)
                return -EINVAL;

        /* Prepare the infopacket for DC. */
        switch (state->connector->connector_type) {
        case DRM_MODE_CONNECTOR_HDMIA:
                out->hb0 = 0x87; /* type */
                out->hb1 = 0x01; /* version */
                out->hb2 = 0x1A; /* length */
                out->sb[0] = buf[3]; /* checksum */
                i = 1;
                break;

        case DRM_MODE_CONNECTOR_DisplayPort:
        case DRM_MODE_CONNECTOR_eDP:
                out->hb0 = 0x00; /* sdp id, zero */
                out->hb1 = 0x87; /* type */
                out->hb2 = 0x1D; /* payload len - 1 */
                out->hb3 = (0x13 << 2); /* sdp version */
                out->sb[0] = 0x01; /* version */
                out->sb[1] = 0x1A; /* length */
                i = 2;
                break;

        default:
                return -EINVAL;
        }

        memcpy(&out->sb[i], &buf[4], 26);
        out->valid = true;

        print_hex_dump(KERN_DEBUG, "HDR SB:", DUMP_PREFIX_NONE, 16, 1, out->sb,
                       sizeof(out->sb), false);

        return 0;
}

static bool
is_hdr_metadata_different(const struct drm_connector_state *old_state,
                          const struct drm_connector_state *new_state)
{
        struct drm_property_blob *old_blob = old_state->hdr_output_metadata;
        struct drm_property_blob *new_blob = new_state->hdr_output_metadata;

        if (old_blob != new_blob) {
                if (old_blob && new_blob &&
                    old_blob->length == new_blob->length)
                        return memcmp(old_blob->data, new_blob->data,
                                      old_blob->length);

                return true;
        }

        return false;
}

static int
amdgpu_dm_connector_atomic_check(struct drm_connector *conn,
                                 struct drm_atomic_state *state)
{
        struct drm_connector_state *new_con_state =
                drm_atomic_get_new_connector_state(state, conn);
        struct drm_connector_state *old_con_state =
                drm_atomic_get_old_connector_state(state, conn);
        struct drm_crtc *crtc = new_con_state->crtc;
        struct drm_crtc_state *new_crtc_state;
        int ret;

        if (!crtc)
                return 0;

        if (is_hdr_metadata_different(old_con_state, new_con_state)) {
                struct dc_info_packet hdr_infopacket;

                ret = fill_hdr_info_packet(new_con_state, &hdr_infopacket);
                if (ret)
                        return ret;

                new_crtc_state = drm_atomic_get_crtc_state(state, crtc);
                if (IS_ERR(new_crtc_state))
                        return PTR_ERR(new_crtc_state);

                /*
                 * DC considers the stream backends changed if the
                 * static metadata changes. Forcing the modeset also
                 * gives a simple way for userspace to switch from
                 * 8bpc to 10bpc when setting the metadata to enter
                 * or exit HDR.
                 *
                 * Changing the static metadata after it's been
                 * set is permissible, however. So only force a
                 * modeset if we're entering or exiting HDR.
                 */
                new_crtc_state->mode_changed =
                        !old_con_state->hdr_output_metadata ||
                        !new_con_state->hdr_output_metadata;
        }

        return 0;
}

static const struct drm_connector_helper_funcs
amdgpu_dm_connector_helper_funcs = {
        /*
         * If hotplugging a second bigger display in FB Con mode, bigger resolution
         * modes will be filtered by drm_mode_validate_size(), and those modes
         * are missing after user start lightdm. So we need to renew modes list.
         * in get_modes call back, not just return the modes count
         */
        .get_modes = get_modes,
        .mode_valid = amdgpu_dm_connector_mode_valid,
        .atomic_check = amdgpu_dm_connector_atomic_check,
};

static void dm_crtc_helper_disable(struct drm_crtc *crtc)
{
}

static bool does_crtc_have_active_cursor(struct drm_crtc_state *new_crtc_state)
{
        struct drm_device *dev = new_crtc_state->crtc->dev;
        struct drm_plane *plane;

        drm_for_each_plane_mask(plane, dev, new_crtc_state->plane_mask) {
                if (plane->type == DRM_PLANE_TYPE_CURSOR)
                        return true;
        }

        return false;
}

static int count_crtc_active_planes(struct drm_crtc_state *new_crtc_state)
{
        struct drm_atomic_state *state = new_crtc_state->state;
        struct drm_plane *plane;
        int num_active = 0;

        drm_for_each_plane_mask(plane, state->dev, new_crtc_state->plane_mask) {
                struct drm_plane_state *new_plane_state;

                /* Cursor planes are "fake". */
                if (plane->type == DRM_PLANE_TYPE_CURSOR)
                        continue;

                new_plane_state = drm_atomic_get_new_plane_state(state, plane);

                if (!new_plane_state) {
                        /*
                         * The plane is enable on the CRTC and hasn't changed
                         * state. This means that it previously passed
                         * validation and is therefore enabled.
                         */
                        num_active += 1;
                        continue;
                }

                /* We need a framebuffer to be considered enabled. */
                num_active += (new_plane_state->fb != NULL);
        }

        return num_active;
}

/*
 * Sets whether interrupts should be enabled on a specific CRTC.
 * We require that the stream be enabled and that there exist active
 * DC planes on the stream.
 */
static void
dm_update_crtc_interrupt_state(struct drm_crtc *crtc,
                               struct drm_crtc_state *new_crtc_state)
{
        struct dm_crtc_state *dm_new_crtc_state =
                to_dm_crtc_state(new_crtc_state);

        dm_new_crtc_state->active_planes = 0;
        dm_new_crtc_state->interrupts_enabled = false;

        if (!dm_new_crtc_state->stream)
                return;

        dm_new_crtc_state->active_planes =
                count_crtc_active_planes(new_crtc_state);

        dm_new_crtc_state->interrupts_enabled =
                dm_new_crtc_state->active_planes > 0;
}

static int dm_crtc_helper_atomic_check(struct drm_crtc *crtc,
                                       struct drm_crtc_state *state)
{
        struct amdgpu_device *adev = crtc->dev->dev_private;
        struct dc *dc = adev->dm.dc;
        struct dm_crtc_state *dm_crtc_state = to_dm_crtc_state(state);
        int ret = -EINVAL;

        /*
         * Update interrupt state for the CRTC. This needs to happen whenever
         * the CRTC has changed or whenever any of its planes have changed.
         * Atomic check satisfies both of these requirements since the CRTC
         * is added to the state by DRM during drm_atomic_helper_check_planes.
         */
        dm_update_crtc_interrupt_state(crtc, state);

        if (unlikely(!dm_crtc_state->stream &&
                     modeset_required(state, NULL, dm_crtc_state->stream))) {
                WARN_ON(1);
                return ret;
        }

        /* In some use cases, like reset, no stream is attached */
        if (!dm_crtc_state->stream)
                return 0;

        /*
         * We want at least one hardware plane enabled to use
         * the stream with a cursor enabled.
         */
        if (state->enable && state->active &&
            does_crtc_have_active_cursor(state) &&
            dm_crtc_state->active_planes == 0)
                return -EINVAL;

        if (dc_validate_stream(dc, dm_crtc_state->stream) == DC_OK)
                return 0;

        return ret;
}

static bool dm_crtc_helper_mode_fixup(struct drm_crtc *crtc,
                                      const struct drm_display_mode *mode,
                                      struct drm_display_mode *adjusted_mode)
{
        return true;
}

static const struct drm_crtc_helper_funcs amdgpu_dm_crtc_helper_funcs = {
        .disable = dm_crtc_helper_disable,
        .atomic_check = dm_crtc_helper_atomic_check,
        .mode_fixup = dm_crtc_helper_mode_fixup
};

static void dm_encoder_helper_disable(struct drm_encoder *encoder)
{

}

static int convert_dc_color_depth_into_bpc (enum dc_color_depth display_color_depth)
{
        switch (display_color_depth) {
                case COLOR_DEPTH_666:
                        return 6;
                case COLOR_DEPTH_888:
                        return 8;
                case COLOR_DEPTH_101010:
                        return 10;
                case COLOR_DEPTH_121212:
                        return 12;
                case COLOR_DEPTH_141414:
                        return 14;
                case COLOR_DEPTH_161616:
                        return 16;
                default:
                        break;
                }
        return 0;
}

static int dm_encoder_helper_atomic_check(struct drm_encoder *encoder,
                                          struct drm_crtc_state *crtc_state,
                                          struct drm_connector_state *conn_state)
{
        struct drm_atomic_state *state = crtc_state->state;
        struct drm_connector *connector = conn_state->connector;
        struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(connector);
        struct dm_connector_state *dm_new_connector_state = to_dm_connector_state(conn_state);
        const struct drm_display_mode *adjusted_mode = &crtc_state->adjusted_mode;
        struct drm_dp_mst_topology_mgr *mst_mgr;
        struct drm_dp_mst_port *mst_port;
        enum dc_color_depth color_depth;
        int clock, bpp = 0;
        bool is_y420 = false;

        if (!aconnector->port || !aconnector->dc_sink)
                return 0;

        mst_port = aconnector->port;
        mst_mgr = &aconnector->mst_port->mst_mgr;

        if (!crtc_state->connectors_changed && !crtc_state->mode_changed)
                return 0;

        if (!state->duplicated) {
                is_y420 = drm_mode_is_420_also(&connector->display_info, adjusted_mode) &&
                                aconnector->force_yuv420_output;
                color_depth = convert_color_depth_from_display_info(connector, conn_state,
                                                                    is_y420);
                bpp = convert_dc_color_depth_into_bpc(color_depth) * 3;
                clock = adjusted_mode->clock;
                dm_new_connector_state->pbn = drm_dp_calc_pbn_mode(clock, bpp, false);
        }
        dm_new_connector_state->vcpi_slots = drm_dp_atomic_find_vcpi_slots(state,
                                                                           mst_mgr,
                                                                           mst_port,
                                                                           dm_new_connector_state->pbn,
                                                                           0);
        if (dm_new_connector_state->vcpi_slots < 0) {
                DRM_DEBUG_ATOMIC("failed finding vcpi slots: %d\n", (int)dm_new_connector_state->vcpi_slots);
                return dm_new_connector_state->vcpi_slots;
        }
        return 0;
}

const struct drm_encoder_helper_funcs amdgpu_dm_encoder_helper_funcs = {
        .disable = dm_encoder_helper_disable,
        .atomic_check = dm_encoder_helper_atomic_check
};

#if defined(CONFIG_DRM_AMD_DC_DCN)
static int dm_update_mst_vcpi_slots_for_dsc(struct drm_atomic_state *state,
                                            struct dc_state *dc_state)
{
        struct dc_stream_state *stream = NULL;
        struct drm_connector *connector;
        struct drm_connector_state *new_con_state, *old_con_state;
        struct amdgpu_dm_connector *aconnector;
        struct dm_connector_state *dm_conn_state;
        int i, j, clock, bpp;
        int vcpi, pbn_div, pbn = 0;

        for_each_oldnew_connector_in_state(state, connector, old_con_state, new_con_state, i) {

                aconnector = to_amdgpu_dm_connector(connector);

                if (!aconnector->port)
                        continue;

                if (!new_con_state || !new_con_state->crtc)
                        continue;

                dm_conn_state = to_dm_connector_state(new_con_state);

                for (j = 0; j < dc_state->stream_count; j++) {
                        stream = dc_state->streams[j];
                        if (!stream)
                                continue;

                        if ((struct amdgpu_dm_connector*)stream->dm_stream_context == aconnector)
                                break;

                        stream = NULL;
                }

                if (!stream)
                        continue;

                if (stream->timing.flags.DSC != 1) {
                        drm_dp_mst_atomic_enable_dsc(state,
                                                     aconnector->port,
                                                     dm_conn_state->pbn,
                                                     0,
                                                     false);
                        continue;
                }

                pbn_div = dm_mst_get_pbn_divider(stream->link);
                bpp = stream->timing.dsc_cfg.bits_per_pixel;
                clock = stream->timing.pix_clk_100hz / 10;
                pbn = drm_dp_calc_pbn_mode(clock, bpp, true);
                vcpi = drm_dp_mst_atomic_enable_dsc(state,
                                                    aconnector->port,
                                                    pbn, pbn_div,
                                                    true);
                if (vcpi < 0)
                        return vcpi;

                dm_conn_state->pbn = pbn;
                dm_conn_state->vcpi_slots = vcpi;
        }
        return 0;
}
#endif

static void dm_drm_plane_reset(struct drm_plane *plane)
{
        struct dm_plane_state *amdgpu_state = NULL;

        if (plane->state)
                plane->funcs->atomic_destroy_state(plane, plane->state);

        amdgpu_state = kzalloc(sizeof(*amdgpu_state), GFP_KERNEL);
        WARN_ON(amdgpu_state == NULL);

        if (amdgpu_state)
                __drm_atomic_helper_plane_reset(plane, &amdgpu_state->base);
}

static struct drm_plane_state *
dm_drm_plane_duplicate_state(struct drm_plane *plane)
{
        struct dm_plane_state *dm_plane_state, *old_dm_plane_state;

        old_dm_plane_state = to_dm_plane_state(plane->state);
        dm_plane_state = kzalloc(sizeof(*dm_plane_state), GFP_KERNEL);
        if (!dm_plane_state)
                return NULL;

        __drm_atomic_helper_plane_duplicate_state(plane, &dm_plane_state->base);

        if (old_dm_plane_state->dc_state) {
                dm_plane_state->dc_state = old_dm_plane_state->dc_state;
                dc_plane_state_retain(dm_plane_state->dc_state);
        }

        return &dm_plane_state->base;
}

void dm_drm_plane_destroy_state(struct drm_plane *plane,
                                struct drm_plane_state *state)
{
        struct dm_plane_state *dm_plane_state = to_dm_plane_state(state);

        if (dm_plane_state->dc_state)
                dc_plane_state_release(dm_plane_state->dc_state);

        drm_atomic_helper_plane_destroy_state(plane, state);
}

static const struct drm_plane_funcs dm_plane_funcs = {
        .update_plane   = drm_atomic_helper_update_plane,
        .disable_plane  = drm_atomic_helper_disable_plane,
        .destroy        = drm_primary_helper_destroy,
        .reset = dm_drm_plane_reset,
        .atomic_duplicate_state = dm_drm_plane_duplicate_state,
        .atomic_destroy_state = dm_drm_plane_destroy_state,
};

static int dm_plane_helper_prepare_fb(struct drm_plane *plane,
                                      struct drm_plane_state *new_state)
{
        struct amdgpu_framebuffer *afb;
        struct drm_gem_object *obj;
        struct amdgpu_device *adev;
        struct amdgpu_bo *rbo;
        struct dm_plane_state *dm_plane_state_new, *dm_plane_state_old;
        struct list_head list;
        struct ttm_validate_buffer tv;
        struct ww_acquire_ctx ticket;
        uint64_t tiling_flags;
        uint32_t domain;
        int r;

        dm_plane_state_old = to_dm_plane_state(plane->state);
        dm_plane_state_new = to_dm_plane_state(new_state);

        if (!new_state->fb) {
                DRM_DEBUG_DRIVER("No FB bound\n");
                return 0;
        }

        afb = to_amdgpu_framebuffer(new_state->fb);
        obj = new_state->fb->obj[0];
        rbo = gem_to_amdgpu_bo(obj);
        adev = amdgpu_ttm_adev(rbo->tbo.bdev);
        INIT_LIST_HEAD(&list);

        tv.bo = &rbo->tbo;
        tv.num_shared = 1;
        list_add(&tv.head, &list);

        r = ttm_eu_reserve_buffers(&ticket, &list, false, NULL);
        if (r) {
                dev_err(adev->dev, "fail to reserve bo (%d)\n", r);
                return r;
        }

        if (plane->type != DRM_PLANE_TYPE_CURSOR)
                domain = amdgpu_display_supported_domains(adev, rbo->flags);
        else
                domain = AMDGPU_GEM_DOMAIN_VRAM;

        r = amdgpu_bo_pin(rbo, domain);
        if (unlikely(r != 0)) {
                if (r != -ERESTARTSYS)
                        DRM_ERROR("Failed to pin framebuffer with error %d\n", r);
                ttm_eu_backoff_reservation(&ticket, &list);
                return r;
        }

        r = amdgpu_ttm_alloc_gart(&rbo->tbo);
        if (unlikely(r != 0)) {
                amdgpu_bo_unpin(rbo);
                ttm_eu_backoff_reservation(&ticket, &list);
                DRM_ERROR("%p bind failed\n", rbo);
                return r;
        }

        amdgpu_bo_get_tiling_flags(rbo, &tiling_flags);

        ttm_eu_backoff_reservation(&ticket, &list);

        afb->address = amdgpu_bo_gpu_offset(rbo);

        amdgpu_bo_ref(rbo);

        if (dm_plane_state_new->dc_state &&
                        dm_plane_state_old->dc_state != dm_plane_state_new->dc_state) {
                struct dc_plane_state *plane_state = dm_plane_state_new->dc_state;

                fill_plane_buffer_attributes(
                        adev, afb, plane_state->format, plane_state->rotation,
                        tiling_flags, &plane_state->tiling_info,
                        &plane_state->plane_size, &plane_state->dcc,
                        &plane_state->address);
        }

        return 0;
}

static void dm_plane_helper_cleanup_fb(struct drm_plane *plane,
                                       struct drm_plane_state *old_state)
{
        struct amdgpu_bo *rbo;
        int r;

        if (!old_state->fb)
                return;

        rbo = gem_to_amdgpu_bo(old_state->fb->obj[0]);
        r = amdgpu_bo_reserve(rbo, false);
        if (unlikely(r)) {
                DRM_ERROR("failed to reserve rbo before unpin\n");
                return;
        }

        amdgpu_bo_unpin(rbo);
        amdgpu_bo_unreserve(rbo);
        amdgpu_bo_unref(&rbo);
}

static int dm_plane_atomic_check(struct drm_plane *plane,
                                 struct drm_plane_state *state)
{
        struct amdgpu_device *adev = plane->dev->dev_private;
        struct dc *dc = adev->dm.dc;
        struct dm_plane_state *dm_plane_state;
        struct dc_scaling_info scaling_info;
        int ret;

        dm_plane_state = to_dm_plane_state(state);

        if (!dm_plane_state->dc_state)
                return 0;

        ret = fill_dc_scaling_info(state, &scaling_info);
        if (ret)
                return ret;

        if (dc_validate_plane(dc, dm_plane_state->dc_state) == DC_OK)
                return 0;

        return -EINVAL;
}

static int dm_plane_atomic_async_check(struct drm_plane *plane,
                                       struct drm_plane_state *new_plane_state)
{
        /* Only support async updates on cursor planes. */
        if (plane->type != DRM_PLANE_TYPE_CURSOR)
                return -EINVAL;

        return 0;
}

static void dm_plane_atomic_async_update(struct drm_plane *plane,
                                         struct drm_plane_state *new_state)
{
        struct drm_plane_state *old_state =
                drm_atomic_get_old_plane_state(new_state->state, plane);

        swap(plane->state->fb, new_state->fb);

        plane->state->src_x = new_state->src_x;
        plane->state->src_y = new_state->src_y;
        plane->state->src_w = new_state->src_w;
        plane->state->src_h = new_state->src_h;
        plane->state->crtc_x = new_state->crtc_x;
        plane->state->crtc_y = new_state->crtc_y;
        plane->state->crtc_w = new_state->crtc_w;
        plane->state->crtc_h = new_state->crtc_h;

        handle_cursor_update(plane, old_state);
}

static const struct drm_plane_helper_funcs dm_plane_helper_funcs = {
        .prepare_fb = dm_plane_helper_prepare_fb,
        .cleanup_fb = dm_plane_helper_cleanup_fb,
        .atomic_check = dm_plane_atomic_check,
        .atomic_async_check = dm_plane_atomic_async_check,
        .atomic_async_update = dm_plane_atomic_async_update
};

/*
 * TODO: these are currently initialized to rgb formats only.
 * For future use cases we should either initialize them dynamically based on
 * plane capabilities, or initialize this array to all formats, so internal drm
 * check will succeed, and let DC implement proper check
 */
static const uint32_t rgb_formats[] = {
        DRM_FORMAT_XRGB8888,
        DRM_FORMAT_ARGB8888,
        DRM_FORMAT_RGBA8888,
        DRM_FORMAT_XRGB2101010,
        DRM_FORMAT_XBGR2101010,
        DRM_FORMAT_ARGB2101010,
        DRM_FORMAT_ABGR2101010,
        DRM_FORMAT_XBGR8888,
        DRM_FORMAT_ABGR8888,
        DRM_FORMAT_RGB565,
};

static const uint32_t overlay_formats[] = {
        DRM_FORMAT_XRGB8888,
        DRM_FORMAT_ARGB8888,
        DRM_FORMAT_RGBA8888,
        DRM_FORMAT_XBGR8888,
        DRM_FORMAT_ABGR8888,
        DRM_FORMAT_RGB565
};

static const u32 cursor_formats[] = {
        DRM_FORMAT_ARGB8888
};

static int get_plane_formats(const struct drm_plane *plane,
                             const struct dc_plane_cap *plane_cap,
                             uint32_t *formats, int max_formats)
{
        int i, num_formats = 0;

        /*
         * TODO: Query support for each group of formats directly from
         * DC plane caps. This will require adding more formats to the
         * caps list.
         */

        switch (plane->type) {
        case DRM_PLANE_TYPE_PRIMARY:
                for (i = 0; i < ARRAY_SIZE(rgb_formats); ++i) {
                        if (num_formats >= max_formats)
                                break;

                        formats[num_formats++] = rgb_formats[i];
                }

                if (plane_cap && plane_cap->pixel_format_support.nv12)
                        formats[num_formats++] = DRM_FORMAT_NV12;
                break;

        case DRM_PLANE_TYPE_OVERLAY:
                for (i = 0; i < ARRAY_SIZE(overlay_formats); ++i) {
                        if (num_formats >= max_formats)
                                break;

                        formats[num_formats++] = overlay_formats[i];
                }
                break;

        case DRM_PLANE_TYPE_CURSOR:
                for (i = 0; i < ARRAY_SIZE(cursor_formats); ++i) {
                        if (num_formats >= max_formats)
                                break;

                        formats[num_formats++] = cursor_formats[i];
                }
                break;
        }

        return num_formats;
}

static int amdgpu_dm_plane_init(struct amdgpu_display_manager *dm,
                                struct drm_plane *plane,
                                unsigned long possible_crtcs,
                                const struct dc_plane_cap *plane_cap)
{
        uint32_t formats[32];
        int num_formats;
        int res = -EPERM;

        num_formats = get_plane_formats(plane, plane_cap, formats,
                                        ARRAY_SIZE(formats));

        res = drm_universal_plane_init(dm->adev->ddev, plane, possible_crtcs,
                                       &dm_plane_funcs, formats, num_formats,
                                       NULL, plane->type, NULL);
        if (res)
                return res;

        if (plane->type == DRM_PLANE_TYPE_OVERLAY &&
            plane_cap && plane_cap->per_pixel_alpha) {
                unsigned int blend_caps = BIT(DRM_MODE_BLEND_PIXEL_NONE) |
                                          BIT(DRM_MODE_BLEND_PREMULTI);

                drm_plane_create_alpha_property(plane);
                drm_plane_create_blend_mode_property(plane, blend_caps);
        }

        if (plane->type == DRM_PLANE_TYPE_PRIMARY &&
            plane_cap && plane_cap->pixel_format_support.nv12) {
                /* This only affects YUV formats. */
                drm_plane_create_color_properties(
                        plane,
                        BIT(DRM_COLOR_YCBCR_BT601) |
                        BIT(DRM_COLOR_YCBCR_BT709),
                        BIT(DRM_COLOR_YCBCR_LIMITED_RANGE) |
                        BIT(DRM_COLOR_YCBCR_FULL_RANGE),
                        DRM_COLOR_YCBCR_BT709, DRM_COLOR_YCBCR_LIMITED_RANGE);
        }

        drm_plane_helper_add(plane, &dm_plane_helper_funcs);

        /* Create (reset) the plane state */
        if (plane->funcs->reset)
                plane->funcs->reset(plane);

        return 0;
}

static int amdgpu_dm_crtc_init(struct amdgpu_display_manager *dm,
                               struct drm_plane *plane,
                               uint32_t crtc_index)
{
        struct amdgpu_crtc *acrtc = NULL;
        struct drm_plane *cursor_plane;

        int res = -ENOMEM;

        cursor_plane = kzalloc(sizeof(*cursor_plane), GFP_KERNEL);
        if (!cursor_plane)
                goto fail;

        cursor_plane->type = DRM_PLANE_TYPE_CURSOR;
        res = amdgpu_dm_plane_init(dm, cursor_plane, 0, NULL);

        acrtc = kzalloc(sizeof(struct amdgpu_crtc), GFP_KERNEL);
        if (!acrtc)
                goto fail;

        res = drm_crtc_init_with_planes(
                        dm->ddev,
                        &acrtc->base,
                        plane,
                        cursor_plane,
                        &amdgpu_dm_crtc_funcs, NULL);

        if (res)
                goto fail;

        drm_crtc_helper_add(&acrtc->base, &amdgpu_dm_crtc_helper_funcs);

        /* Create (reset) the plane state */
        if (acrtc->base.funcs->reset)
                acrtc->base.funcs->reset(&acrtc->base);

        acrtc->max_cursor_width = dm->adev->dm.dc->caps.max_cursor_size;
        acrtc->max_cursor_height = dm->adev->dm.dc->caps.max_cursor_size;

        acrtc->crtc_id = crtc_index;
        acrtc->base.enabled = false;
        acrtc->otg_inst = -1;

        dm->adev->mode_info.crtcs[crtc_index] = acrtc;
        drm_crtc_enable_color_mgmt(&acrtc->base, MAX_COLOR_LUT_ENTRIES,
                                   true, MAX_COLOR_LUT_ENTRIES);
        drm_mode_crtc_set_gamma_size(&acrtc->base, MAX_COLOR_LEGACY_LUT_ENTRIES);

        return 0;

fail:
        kfree(acrtc);
        kfree(cursor_plane);
        return res;
}


static int to_drm_connector_type(enum signal_type st)
{
        switch (st) {
        case SIGNAL_TYPE_HDMI_TYPE_A:
                return DRM_MODE_CONNECTOR_HDMIA;
        case SIGNAL_TYPE_EDP:
                return DRM_MODE_CONNECTOR_eDP;
        case SIGNAL_TYPE_LVDS:
                return DRM_MODE_CONNECTOR_LVDS;
        case SIGNAL_TYPE_RGB:
                return DRM_MODE_CONNECTOR_VGA;
        case SIGNAL_TYPE_DISPLAY_PORT:
        case SIGNAL_TYPE_DISPLAY_PORT_MST:
                return DRM_MODE_CONNECTOR_DisplayPort;
        case SIGNAL_TYPE_DVI_DUAL_LINK:
        case SIGNAL_TYPE_DVI_SINGLE_LINK:
                return DRM_MODE_CONNECTOR_DVID;
        case SIGNAL_TYPE_VIRTUAL:
                return DRM_MODE_CONNECTOR_VIRTUAL;

        default:
                return DRM_MODE_CONNECTOR_Unknown;
        }
}

static struct drm_encoder *amdgpu_dm_connector_to_encoder(struct drm_connector *connector)
{
        struct drm_encoder *encoder;

        /* There is only one encoder per connector */
        drm_connector_for_each_possible_encoder(connector, encoder)
                return encoder;

        return NULL;
}

static void amdgpu_dm_get_native_mode(struct drm_connector *connector)
{
        struct drm_encoder *encoder;
        struct amdgpu_encoder *amdgpu_encoder;

        encoder = amdgpu_dm_connector_to_encoder(connector);

        if (encoder == NULL)
                return;

        amdgpu_encoder = to_amdgpu_encoder(encoder);

        amdgpu_encoder->native_mode.clock = 0;

        if (!list_empty(&connector->probed_modes)) {
                struct drm_display_mode *preferred_mode = NULL;

                list_for_each_entry(preferred_mode,
                                    &connector->probed_modes,
                                    head) {
                        if (preferred_mode->type & DRM_MODE_TYPE_PREFERRED)
                                amdgpu_encoder->native_mode = *preferred_mode;

                        break;
                }

        }
}

static struct drm_display_mode *
amdgpu_dm_create_common_mode(struct drm_encoder *encoder,
                             char *name,
                             int hdisplay, int vdisplay)
{
        struct drm_device *dev = encoder->dev;
        struct amdgpu_encoder *amdgpu_encoder = to_amdgpu_encoder(encoder);
        struct drm_display_mode *mode = NULL;
        struct drm_display_mode *native_mode = &amdgpu_encoder->native_mode;

        mode = drm_mode_duplicate(dev, native_mode);

        if (mode == NULL)
                return NULL;

        mode->hdisplay = hdisplay;
        mode->vdisplay = vdisplay;
        mode->type &= ~DRM_MODE_TYPE_PREFERRED;
        strscpy(mode->name, name, DRM_DISPLAY_MODE_LEN);

        return mode;

}

static void amdgpu_dm_connector_add_common_modes(struct drm_encoder *encoder,
                                                 struct drm_connector *connector)
{
        struct amdgpu_encoder *amdgpu_encoder = to_amdgpu_encoder(encoder);
        struct drm_display_mode *mode = NULL;
        struct drm_display_mode *native_mode = &amdgpu_encoder->native_mode;
        struct amdgpu_dm_connector *amdgpu_dm_connector =
                                to_amdgpu_dm_connector(connector);
        int i;
        int n;
        struct mode_size {
                char name[DRM_DISPLAY_MODE_LEN];
                int w;
                int h;
        } common_modes[] = {
                {  "640x480",  640,  480},
                {  "800x600",  800,  600},
                { "1024x768", 1024,  768},
                { "1280x720", 1280,  720},
                { "1280x800", 1280,  800},
                {"1280x1024", 1280, 1024},
                { "1440x900", 1440,  900},
                {"1680x1050", 1680, 1050},
                {"1600x1200", 1600, 1200},
                {"1920x1080", 1920, 1080},
                {"1920x1200", 1920, 1200}
        };

        n = ARRAY_SIZE(common_modes);

        for (i = 0; i < n; i++) {
                struct drm_display_mode *curmode = NULL;
                bool mode_existed = false;

                if (common_modes[i].w > native_mode->hdisplay ||
                    common_modes[i].h > native_mode->vdisplay ||
                   (common_modes[i].w == native_mode->hdisplay &&
                    common_modes[i].h == native_mode->vdisplay))
                        continue;

                list_for_each_entry(curmode, &connector->probed_modes, head) {
                        if (common_modes[i].w == curmode->hdisplay &&
                            common_modes[i].h == curmode->vdisplay) {
                                mode_existed = true;
                                break;
                        }
                }

                if (mode_existed)
                        continue;

                mode = amdgpu_dm_create_common_mode(encoder,
                                common_modes[i].name, common_modes[i].w,
                                common_modes[i].h);
                drm_mode_probed_add(connector, mode);
                amdgpu_dm_connector->num_modes++;
        }
}

static void amdgpu_dm_connector_ddc_get_modes(struct drm_connector *connector,
                                              struct edid *edid)
{
        struct amdgpu_dm_connector *amdgpu_dm_connector =
                        to_amdgpu_dm_connector(connector);

        if (edid) {
                /* empty probed_modes */
                INIT_LIST_HEAD(&connector->probed_modes);
                amdgpu_dm_connector->num_modes =
                                drm_add_edid_modes(connector, edid);

                /* sorting the probed modes before calling function
                 * amdgpu_dm_get_native_mode() since EDID can have
                 * more than one preferred mode. The modes that are
                 * later in the probed mode list could be of higher
                 * and preferred resolution. For example, 3840x2160
                 * resolution in base EDID preferred timing and 4096x2160
                 * preferred resolution in DID extension block later.
                 */
                drm_mode_sort(&connector->probed_modes);
                amdgpu_dm_get_native_mode(connector);
        } else {
                amdgpu_dm_connector->num_modes = 0;
        }
}

static int amdgpu_dm_connector_get_modes(struct drm_connector *connector)
{
        struct amdgpu_dm_connector *amdgpu_dm_connector =
                        to_amdgpu_dm_connector(connector);
        struct drm_encoder *encoder;
        struct edid *edid = amdgpu_dm_connector->edid;

        encoder = amdgpu_dm_connector_to_encoder(connector);

        if (!edid || !drm_edid_is_valid(edid)) {
                amdgpu_dm_connector->num_modes =
                                drm_add_modes_noedid(connector, 640, 480);
        } else {
                amdgpu_dm_connector_ddc_get_modes(connector, edid);
                amdgpu_dm_connector_add_common_modes(encoder, connector);
        }
        amdgpu_dm_fbc_init(connector);

        return amdgpu_dm_connector->num_modes;
}

void amdgpu_dm_connector_init_helper(struct amdgpu_display_manager *dm,
                                     struct amdgpu_dm_connector *aconnector,
                                     int connector_type,
                                     struct dc_link *link,
                                     int link_index)
{
        struct amdgpu_device *adev = dm->ddev->dev_private;

        /*
         * Some of the properties below require access to state, like bpc.
         * Allocate some default initial connector state with our reset helper.
         */
        if (aconnector->base.funcs->reset)
                aconnector->base.funcs->reset(&aconnector->base);

        aconnector->connector_id = link_index;
        aconnector->dc_link = link;
        aconnector->base.interlace_allowed = false;
        aconnector->base.doublescan_allowed = false;
        aconnector->base.stereo_allowed = false;
        aconnector->base.dpms = DRM_MODE_DPMS_OFF;
        aconnector->hpd.hpd = AMDGPU_HPD_NONE; /* not used */
        aconnector->audio_inst = -1;
        mutex_init(&aconnector->hpd_lock);

        /*
         * configure support HPD hot plug connector_>polled default value is 0
         * which means HPD hot plug not supported
         */
        switch (connector_type) {
        case DRM_MODE_CONNECTOR_HDMIA:
                aconnector->base.polled = DRM_CONNECTOR_POLL_HPD;
                aconnector->base.ycbcr_420_allowed =
                        link->link_enc->features.hdmi_ycbcr420_supported ? true : false;
                break;
        case DRM_MODE_CONNECTOR_DisplayPort:
                aconnector->base.polled = DRM_CONNECTOR_POLL_HPD;
                aconnector->base.ycbcr_420_allowed =
                        link->link_enc->features.dp_ycbcr420_supported ? true : false;
                break;
        case DRM_MODE_CONNECTOR_DVID:
                aconnector->base.polled = DRM_CONNECTOR_POLL_HPD;
                break;
        default:
                break;
        }

        drm_object_attach_property(&aconnector->base.base,
                                dm->ddev->mode_config.scaling_mode_property,
                                DRM_MODE_SCALE_NONE);

        drm_object_attach_property(&aconnector->base.base,
                                adev->mode_info.underscan_property,
                                UNDERSCAN_OFF);
        drm_object_attach_property(&aconnector->base.base,
                                adev->mode_info.underscan_hborder_property,
                                0);
        drm_object_attach_property(&aconnector->base.base,
                                adev->mode_info.underscan_vborder_property,
                                0);

        drm_connector_attach_max_bpc_property(&aconnector->base, 8, 16);

        /* This defaults to the max in the range, but we want 8bpc for non-edp. */
        aconnector->base.state->max_bpc = (connector_type == DRM_MODE_CONNECTOR_eDP) ? 16 : 8;
        aconnector->base.state->max_requested_bpc = aconnector->base.state->max_bpc;

        if (connector_type == DRM_MODE_CONNECTOR_eDP &&
            dc_is_dmcu_initialized(adev->dm.dc)) {
                drm_object_attach_property(&aconnector->base.base,
                                adev->mode_info.abm_level_property, 0);
        }

        if (connector_type == DRM_MODE_CONNECTOR_HDMIA ||
            connector_type == DRM_MODE_CONNECTOR_DisplayPort ||
            connector_type == DRM_MODE_CONNECTOR_eDP) {
                drm_object_attach_property(
                        &aconnector->base.base,
                        dm->ddev->mode_config.hdr_output_metadata_property, 0);

                drm_connector_attach_vrr_capable_property(
                        &aconnector->base);
#ifdef CONFIG_DRM_AMD_DC_HDCP
                if (adev->dm.hdcp_workqueue)
                        drm_connector_attach_content_protection_property(&aconnector->base, true);
#endif
        }
}

static int amdgpu_dm_i2c_xfer(struct i2c_adapter *i2c_adap,
                              struct i2c_msg *msgs, int num)
{
        struct amdgpu_i2c_adapter *i2c = i2c_get_adapdata(i2c_adap);
        struct ddc_service *ddc_service = i2c->ddc_service;
        struct i2c_command cmd;
        int i;
        int result = -EIO;

        cmd.payloads = kcalloc(num, sizeof(struct i2c_payload), GFP_KERNEL);

        if (!cmd.payloads)
                return result;

        cmd.number_of_payloads = num;
        cmd.engine = I2C_COMMAND_ENGINE_DEFAULT;
        cmd.speed = 100;

        for (i = 0; i < num; i++) {
                cmd.payloads[i].write = !(msgs[i].flags & I2C_M_RD);
                cmd.payloads[i].address = msgs[i].addr;
                cmd.payloads[i].length = msgs[i].len;
                cmd.payloads[i].data = msgs[i].buf;
        }

        if (dc_submit_i2c(
                        ddc_service->ctx->dc,
                        ddc_service->ddc_pin->hw_info.ddc_channel,
                        &cmd))
                result = num;

        kfree(cmd.payloads);
        return result;
}

static u32 amdgpu_dm_i2c_func(struct i2c_adapter *adap)
{
        return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
}

static const struct i2c_algorithm amdgpu_dm_i2c_algo = {
        .master_xfer = amdgpu_dm_i2c_xfer,
        .functionality = amdgpu_dm_i2c_func,
};

static struct amdgpu_i2c_adapter *
create_i2c(struct ddc_service *ddc_service,
           int link_index,
           int *res)
{
        struct amdgpu_device *adev = ddc_service->ctx->driver_context;
        struct amdgpu_i2c_adapter *i2c;

        i2c = kzalloc(sizeof(struct amdgpu_i2c_adapter), GFP_KERNEL);
        if (!i2c)
                return NULL;
        i2c->base.owner = THIS_MODULE;
        i2c->base.class = I2C_CLASS_DDC;
        i2c->base.dev.parent = &adev->pdev->dev;
        i2c->base.algo = &amdgpu_dm_i2c_algo;
        snprintf(i2c->base.name, sizeof(i2c->base.name), "AMDGPU DM i2c hw bus %d", link_index);
        i2c_set_adapdata(&i2c->base, i2c);
        i2c->ddc_service = ddc_service;
        i2c->ddc_service->ddc_pin->hw_info.ddc_channel = link_index;

        return i2c;
}


/*
 * Note: this function assumes that dc_link_detect() was called for the
 * dc_link which will be represented by this aconnector.
 */
static int amdgpu_dm_connector_init(struct amdgpu_display_manager *dm,
                                    struct amdgpu_dm_connector *aconnector,
                                    uint32_t link_index,
                                    struct amdgpu_encoder *aencoder)
{
        int res = 0;
        int connector_type;
        struct dc *dc = dm->dc;
        struct dc_link *link = dc_get_link_at_index(dc, link_index);
        struct amdgpu_i2c_adapter *i2c;

        link->priv = aconnector;

        DRM_DEBUG_DRIVER("%s()\n", __func__);

        i2c = create_i2c(link->ddc, link->link_index, &res);
        if (!i2c) {
                DRM_ERROR("Failed to create i2c adapter data\n");
                return -ENOMEM;
        }

        aconnector->i2c = i2c;
        res = i2c_add_adapter(&i2c->base);

        if (res) {
                DRM_ERROR("Failed to register hw i2c %d\n", link->link_index);
                goto out_free;
        }

        connector_type = to_drm_connector_type(link->connector_signal);

        res = drm_connector_init_with_ddc(
                        dm->ddev,
                        &aconnector->base,
                        &amdgpu_dm_connector_funcs,
                        connector_type,
                        &i2c->base);

        if (res) {
                DRM_ERROR("connector_init failed\n");
                aconnector->connector_id = -1;
                goto out_free;
        }

        drm_connector_helper_add(
                        &aconnector->base,
                        &amdgpu_dm_connector_helper_funcs);

        amdgpu_dm_connector_init_helper(
                dm,
                aconnector,
                connector_type,
                link,
                link_index);

        drm_connector_attach_encoder(
                &aconnector->base, &aencoder->base);

        drm_connector_register(&aconnector->base);
#if defined(CONFIG_DEBUG_FS)
        connector_debugfs_init(aconnector);
        aconnector->debugfs_dpcd_address = 0;
        aconnector->debugfs_dpcd_size = 0;
#endif

        if (connector_type == DRM_MODE_CONNECTOR_DisplayPort
                || connector_type == DRM_MODE_CONNECTOR_eDP)
                amdgpu_dm_initialize_dp_connector(dm, aconnector);

out_free:
        if (res) {
                kfree(i2c);
                aconnector->i2c = NULL;
        }
        return res;
}

int amdgpu_dm_get_encoder_crtc_mask(struct amdgpu_device *adev)
{
        switch (adev->mode_info.num_crtc) {
        case 1:
                return 0x1;
        case 2:
                return 0x3;
        case 3:
                return 0x7;
        case 4:
                return 0xf;
        case 5:
                return 0x1f;
        case 6:
        default:
                return 0x3f;
        }
}

static int amdgpu_dm_encoder_init(struct drm_device *dev,
                                  struct amdgpu_encoder *aencoder,
                                  uint32_t link_index)
{
        struct amdgpu_device *adev = dev->dev_private;

        int res = drm_encoder_init(dev,
                                   &aencoder->base,
                                   &amdgpu_dm_encoder_funcs,
                                   DRM_MODE_ENCODER_TMDS,
                                   NULL);

        aencoder->base.possible_crtcs = amdgpu_dm_get_encoder_crtc_mask(adev);

        if (!res)
                aencoder->encoder_id = link_index;
        else
                aencoder->encoder_id = -1;

        drm_encoder_helper_add(&aencoder->base, &amdgpu_dm_encoder_helper_funcs);

        return res;
}

static void manage_dm_interrupts(struct amdgpu_device *adev,
                                 struct amdgpu_crtc *acrtc,
                                 bool enable)
{
        /*
         * this is not correct translation but will work as soon as VBLANK
         * constant is the same as PFLIP
         */
        int irq_type =
                amdgpu_display_crtc_idx_to_irq_type(
                        adev,
                        acrtc->crtc_id);

        if (enable) {
                drm_crtc_vblank_on(&acrtc->base);
                amdgpu_irq_get(
                        adev,
                        &adev->pageflip_irq,
                        irq_type);
        } else {

                amdgpu_irq_put(
                        adev,
                        &adev->pageflip_irq,
                        irq_type);
                drm_crtc_vblank_off(&acrtc->base);
        }
}

static bool
is_scaling_state_different(const struct dm_connector_state *dm_state,
                           const struct dm_connector_state *old_dm_state)
{
        if (dm_state->scaling != old_dm_state->scaling)
                return true;
        if (!dm_state->underscan_enable && old_dm_state->underscan_enable) {
                if (old_dm_state->underscan_hborder != 0 && old_dm_state->underscan_vborder != 0)
                        return true;
        } else  if (dm_state->underscan_enable && !old_dm_state->underscan_enable) {
                if (dm_state->underscan_hborder != 0 && dm_state->underscan_vborder != 0)
                        return true;
        } else if (dm_state->underscan_hborder != old_dm_state->underscan_hborder ||
                   dm_state->underscan_vborder != old_dm_state->underscan_vborder)
                return true;
        return false;
}

#ifdef CONFIG_DRM_AMD_DC_HDCP
static bool is_content_protection_different(struct drm_connector_state *state,
                                            const struct drm_connector_state *old_state,
                                            const struct drm_connector *connector, struct hdcp_workqueue *hdcp_w)
{
        struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(connector);

        if (old_state->hdcp_content_type != state->hdcp_content_type &&
            state->content_protection != DRM_MODE_CONTENT_PROTECTION_UNDESIRED) {
                state->content_protection = DRM_MODE_CONTENT_PROTECTION_DESIRED;
                return true;
        }

        /* CP is being re enabled, ignore this */
        if (old_state->content_protection == DRM_MODE_CONTENT_PROTECTION_ENABLED &&
            state->content_protection == DRM_MODE_CONTENT_PROTECTION_DESIRED) {
                state->content_protection = DRM_MODE_CONTENT_PROTECTION_ENABLED;
                return false;
        }

        /* S3 resume case, since old state will always be 0 (UNDESIRED) and the restored state will be ENABLED */
        if (old_state->content_protection == DRM_MODE_CONTENT_PROTECTION_UNDESIRED &&
            state->content_protection == DRM_MODE_CONTENT_PROTECTION_ENABLED)
                state->content_protection = DRM_MODE_CONTENT_PROTECTION_DESIRED;

        /* Check if something is connected/enabled, otherwise we start hdcp but nothing is connected/enabled
         * hot-plug, headless s3, dpms
         */
        if (state->content_protection == DRM_MODE_CONTENT_PROTECTION_DESIRED && connector->dpms == DRM_MODE_DPMS_ON &&
            aconnector->dc_sink != NULL)
                return true;

        if (old_state->content_protection == state->content_protection)
                return false;

        if (state->content_protection == DRM_MODE_CONTENT_PROTECTION_UNDESIRED)
                return true;

        return false;
}

#endif
static void remove_stream(struct amdgpu_device *adev,
                          struct amdgpu_crtc *acrtc,
                          struct dc_stream_state *stream)
{
        /* this is the update mode case */

        acrtc->otg_inst = -1;
        acrtc->enabled = false;
}

static int get_cursor_position(struct drm_plane *plane, struct drm_crtc *crtc,
                               struct dc_cursor_position *position)
{
        struct amdgpu_crtc *amdgpu_crtc = to_amdgpu_crtc(crtc);
        int x, y;
        int xorigin = 0, yorigin = 0;

        position->enable = false;
        position->x = 0;
        position->y = 0;

        if (!crtc || !plane->state->fb)
                return 0;

        if ((plane->state->crtc_w > amdgpu_crtc->max_cursor_width) ||
            (plane->state->crtc_h > amdgpu_crtc->max_cursor_height)) {
                DRM_ERROR("%s: bad cursor width or height %d x %d\n",
                          __func__,
                          plane->state->crtc_w,
                          plane->state->crtc_h);
                return -EINVAL;
        }

        x = plane->state->crtc_x;
        y = plane->state->crtc_y;

        if (x <= -amdgpu_crtc->max_cursor_width ||
            y <= -amdgpu_crtc->max_cursor_height)
                return 0;

        if (crtc->primary->state) {
                /* avivo cursor are offset into the total surface */
                x += crtc->primary->state->src_x >> 16;
                y += crtc->primary->state->src_y >> 16;
        }

        if (x < 0) {
                xorigin = min(-x, amdgpu_crtc->max_cursor_width - 1);
                x = 0;
        }
        if (y < 0) {
                yorigin = min(-y, amdgpu_crtc->max_cursor_height - 1);
                y = 0;
        }
        position->enable = true;
        position->x = x;
        position->y = y;
        position->x_hotspot = xorigin;
        position->y_hotspot = yorigin;

        return 0;
}

static void handle_cursor_update(struct drm_plane *plane,
                                 struct drm_plane_state *old_plane_state)
{
        struct amdgpu_device *adev = plane->dev->dev_private;
        struct amdgpu_framebuffer *afb = to_amdgpu_framebuffer(plane->state->fb);
        struct drm_crtc *crtc = afb ? plane->state->crtc : old_plane_state->crtc;
        struct dm_crtc_state *crtc_state = crtc ? to_dm_crtc_state(crtc->state) : NULL;
        struct amdgpu_crtc *amdgpu_crtc = to_amdgpu_crtc(crtc);
        uint64_t address = afb ? afb->address : 0;
        struct dc_cursor_position position;
        struct dc_cursor_attributes attributes;
        int ret;

        if (!plane->state->fb && !old_plane_state->fb)
                return;

        DRM_DEBUG_DRIVER("%s: crtc_id=%d with size %d to %d\n",
                         __func__,
                         amdgpu_crtc->crtc_id,
                         plane->state->crtc_w,
                         plane->state->crtc_h);

        ret = get_cursor_position(plane, crtc, &position);
        if (ret)
                return;

        if (!position.enable) {
                /* turn off cursor */
                if (crtc_state && crtc_state->stream) {
                        mutex_lock(&adev->dm.dc_lock);
                        dc_stream_set_cursor_position(crtc_state->stream,
                                                      &position);
                        mutex_unlock(&adev->dm.dc_lock);
                }
                return;
        }

        amdgpu_crtc->cursor_width = plane->state->crtc_w;
        amdgpu_crtc->cursor_height = plane->state->crtc_h;

        memset(&attributes, 0, sizeof(attributes));
        attributes.address.high_part = upper_32_bits(address);
        attributes.address.low_part  = lower_32_bits(address);
        attributes.width             = plane->state->crtc_w;
        attributes.height            = plane->state->crtc_h;
        attributes.color_format      = CURSOR_MODE_COLOR_PRE_MULTIPLIED_ALPHA;
        attributes.rotation_angle    = 0;
        attributes.attribute_flags.value = 0;

        attributes.pitch = attributes.width;

        if (crtc_state->stream) {
                mutex_lock(&adev->dm.dc_lock);
                if (!dc_stream_set_cursor_attributes(crtc_state->stream,
                                                         &attributes))
                        DRM_ERROR("DC failed to set cursor attributes\n");

                if (!dc_stream_set_cursor_position(crtc_state->stream,
                                                   &position))
                        DRM_ERROR("DC failed to set cursor position\n");
                mutex_unlock(&adev->dm.dc_lock);
        }
}

static void prepare_flip_isr(struct amdgpu_crtc *acrtc)
{

        assert_spin_locked(&acrtc->base.dev->event_lock);
        WARN_ON(acrtc->event);

        acrtc->event = acrtc->base.state->event;

        /* Set the flip status */
        acrtc->pflip_status = AMDGPU_FLIP_SUBMITTED;

        /* Mark this event as consumed */
        acrtc->base.state->event = NULL;

        DRM_DEBUG_DRIVER("crtc:%d, pflip_stat:AMDGPU_FLIP_SUBMITTED\n",
                                                 acrtc->crtc_id);
}

static void update_freesync_state_on_stream(
        struct amdgpu_display_manager *dm,
        struct dm_crtc_state *new_crtc_state,
        struct dc_stream_state *new_stream,
        struct dc_plane_state *surface,
        u32 flip_timestamp_in_us)
{
        struct mod_vrr_params vrr_params;
        struct dc_info_packet vrr_infopacket = {0};
        struct amdgpu_device *adev = dm->adev;
        unsigned long flags;

        if (!new_stream)
                return;

        /*
         * TODO: Determine why min/max totals and vrefresh can be 0 here.
         * For now it's sufficient to just guard against these conditions.
         */

        if (!new_stream->timing.h_total || !new_stream->timing.v_total)
                return;

        spin_lock_irqsave(&adev->ddev->event_lock, flags);
        vrr_params = new_crtc_state->vrr_params;

        if (surface) {
                mod_freesync_handle_preflip(
                        dm->freesync_module,
                        surface,
                        new_stream,
                        flip_timestamp_in_us,
                        &vrr_params);

                if (adev->family < AMDGPU_FAMILY_AI &&
                    amdgpu_dm_vrr_active(new_crtc_state)) {
                        mod_freesync_handle_v_update(dm->freesync_module,
                                                     new_stream, &vrr_params);

                        /* Need to call this before the frame ends. */
                        dc_stream_adjust_vmin_vmax(dm->dc,
                                                   new_crtc_state->stream,
                                                   &vrr_params.adjust);
                }
        }

        mod_freesync_build_vrr_infopacket(
                dm->freesync_module,
                new_stream,
                &vrr_params,
                PACKET_TYPE_VRR,
                TRANSFER_FUNC_UNKNOWN,
                &vrr_infopacket);

        new_crtc_state->freesync_timing_changed |=
                (memcmp(&new_crtc_state->vrr_params.adjust,
                        &vrr_params.adjust,
                        sizeof(vrr_params.adjust)) != 0);

        new_crtc_state->freesync_vrr_info_changed |=
                (memcmp(&new_crtc_state->vrr_infopacket,
                        &vrr_infopacket,
                        sizeof(vrr_infopacket)) != 0);

        new_crtc_state->vrr_params = vrr_params;
        new_crtc_state->vrr_infopacket = vrr_infopacket;

        new_stream->adjust = new_crtc_state->vrr_params.adjust;
        new_stream->vrr_infopacket = vrr_infopacket;

        if (new_crtc_state->freesync_vrr_info_changed)
                DRM_DEBUG_KMS("VRR packet update: crtc=%u enabled=%d state=%d",
                              new_crtc_state->base.crtc->base.id,
                              (int)new_crtc_state->base.vrr_enabled,
                              (int)vrr_params.state);

        spin_unlock_irqrestore(&adev->ddev->event_lock, flags);
}

static void pre_update_freesync_state_on_stream(
        struct amdgpu_display_manager *dm,
        struct dm_crtc_state *new_crtc_state)
{
        struct dc_stream_state *new_stream = new_crtc_state->stream;
        struct mod_vrr_params vrr_params;
        struct mod_freesync_config config = new_crtc_state->freesync_config;
        struct amdgpu_device *adev = dm->adev;
        unsigned long flags;

        if (!new_stream)
                return;

        /*
         * TODO: Determine why min/max totals and vrefresh can be 0 here.
         * For now it's sufficient to just guard against these conditions.
         */
        if (!new_stream->timing.h_total || !new_stream->timing.v_total)
                return;

        spin_lock_irqsave(&adev->ddev->event_lock, flags);
        vrr_params = new_crtc_state->vrr_params;

        if (new_crtc_state->vrr_supported &&
            config.min_refresh_in_uhz &&
            config.max_refresh_in_uhz) {
                config.state = new_crtc_state->base.vrr_enabled ?
                        VRR_STATE_ACTIVE_VARIABLE :
                        VRR_STATE_INACTIVE;
        } else {
                config.state = VRR_STATE_UNSUPPORTED;
        }

        mod_freesync_build_vrr_params(dm->freesync_module,
                                      new_stream,
                                      &config, &vrr_params);

        new_crtc_state->freesync_timing_changed |=
                (memcmp(&new_crtc_state->vrr_params.adjust,
                        &vrr_params.adjust,
                        sizeof(vrr_params.adjust)) != 0);

        new_crtc_state->vrr_params = vrr_params;
        spin_unlock_irqrestore(&adev->ddev->event_lock, flags);
}

static void amdgpu_dm_handle_vrr_transition(struct dm_crtc_state *old_state,
                                            struct dm_crtc_state *new_state)
{
        bool old_vrr_active = amdgpu_dm_vrr_active(old_state);
        bool new_vrr_active = amdgpu_dm_vrr_active(new_state);

        if (!old_vrr_active && new_vrr_active) {
                /* Transition VRR inactive -> active:
                 * While VRR is active, we must not disable vblank irq, as a
                 * reenable after disable would compute bogus vblank/pflip
                 * timestamps if it likely happened inside display front-porch.
                 *
                 * We also need vupdate irq for the actual core vblank handling
                 * at end of vblank.
                 */
                dm_set_vupdate_irq(new_state->base.crtc, true);
                drm_crtc_vblank_get(new_state->base.crtc);
                DRM_DEBUG_DRIVER("%s: crtc=%u VRR off->on: Get vblank ref\n",
                                 __func__, new_state->base.crtc->base.id);
        } else if (old_vrr_active && !new_vrr_active) {
                /* Transition VRR active -> inactive:
                 * Allow vblank irq disable again for fixed refresh rate.
                 */
                dm_set_vupdate_irq(new_state->base.crtc, false);
                drm_crtc_vblank_put(new_state->base.crtc);
                DRM_DEBUG_DRIVER("%s: crtc=%u VRR on->off: Drop vblank ref\n",
                                 __func__, new_state->base.crtc->base.id);
        }
}

static void amdgpu_dm_commit_cursors(struct drm_atomic_state *state)
{
        struct drm_plane *plane;
        struct drm_plane_state *old_plane_state, *new_plane_state;
        int i;

        /*
         * TODO: Make this per-stream so we don't issue redundant updates for
         * commits with multiple streams.
         */
        for_each_oldnew_plane_in_state(state, plane, old_plane_state,
                                       new_plane_state, i)
                if (plane->type == DRM_PLANE_TYPE_CURSOR)
                        handle_cursor_update(plane, old_plane_state);
}

static void amdgpu_dm_commit_planes(struct drm_atomic_state *state,
                                    struct dc_state *dc_state,
                                    struct drm_device *dev,
                                    struct amdgpu_display_manager *dm,
                                    struct drm_crtc *pcrtc,
                                    bool wait_for_vblank)
{
        uint32_t i;
        uint64_t timestamp_ns;
        struct drm_plane *plane;
        struct drm_plane_state *old_plane_state, *new_plane_state;
        struct amdgpu_crtc *acrtc_attach = to_amdgpu_crtc(pcrtc);
        struct drm_crtc_state *new_pcrtc_state =
                        drm_atomic_get_new_crtc_state(state, pcrtc);
        struct dm_crtc_state *acrtc_state = to_dm_crtc_state(new_pcrtc_state);
        struct dm_crtc_state *dm_old_crtc_state =
                        to_dm_crtc_state(drm_atomic_get_old_crtc_state(state, pcrtc));
        int planes_count = 0, vpos, hpos;
        long r;
        unsigned long flags;
        struct amdgpu_bo *abo;
        uint64_t tiling_flags;
        uint32_t target_vblank, last_flip_vblank;
        bool vrr_active = amdgpu_dm_vrr_active(acrtc_state);
        bool pflip_present = false;
        bool swizzle = true;
        struct {
                struct dc_surface_update surface_updates[MAX_SURFACES];
                struct dc_plane_info plane_infos[MAX_SURFACES];
                struct dc_scaling_info scaling_infos[MAX_SURFACES];
                struct dc_flip_addrs flip_addrs[MAX_SURFACES];
                struct dc_stream_update stream_update;
        } *bundle;

        bundle = kzalloc(sizeof(*bundle), GFP_KERNEL);

        if (!bundle) {
                dm_error("Failed to allocate update bundle\n");
                goto cleanup;
        }

        /*
         * Disable the cursor first if we're disabling all the planes.
         * It'll remain on the screen after the planes are re-enabled
         * if we don't.
         */
        if (acrtc_state->active_planes == 0)
                amdgpu_dm_commit_cursors(state);

        /* update planes when needed */
        for_each_oldnew_plane_in_state(state, plane, old_plane_state, new_plane_state, i) {
                struct drm_crtc *crtc = new_plane_state->crtc;
                struct drm_crtc_state *new_crtc_state;
                struct drm_framebuffer *fb = new_plane_state->fb;
                bool plane_needs_flip;
                struct dc_plane_state *dc_plane;
                struct dm_plane_state *dm_new_plane_state = to_dm_plane_state(new_plane_state);

                /* Cursor plane is handled after stream updates */
                if (plane->type == DRM_PLANE_TYPE_CURSOR)
                        continue;

                if (!fb || !crtc || pcrtc != crtc)
                        continue;

                new_crtc_state = drm_atomic_get_new_crtc_state(state, crtc);
                if (!new_crtc_state->active)
                        continue;

                dc_plane = dm_new_plane_state->dc_state;

                if (dc_plane && !dc_plane->tiling_info.gfx9.swizzle)
                        swizzle = false;

                bundle->surface_updates[planes_count].surface = dc_plane;
                if (new_pcrtc_state->color_mgmt_changed) {
                        bundle->surface_updates[planes_count].gamma = dc_plane->gamma_correction;
                        bundle->surface_updates[planes_count].in_transfer_func = dc_plane->in_transfer_func;
                }

                fill_dc_scaling_info(new_plane_state,
                                     &bundle->scaling_infos[planes_count]);

                bundle->surface_updates[planes_count].scaling_info =
                        &bundle->scaling_infos[planes_count];

                plane_needs_flip = old_plane_state->fb && new_plane_state->fb;

                pflip_present = pflip_present || plane_needs_flip;

                if (!plane_needs_flip) {
                        planes_count += 1;
                        continue;
                }

                abo = gem_to_amdgpu_bo(fb->obj[0]);

                /*
                 * Wait for all fences on this FB. Do limited wait to avoid
                 * deadlock during GPU reset when this fence will not signal
                 * but we hold reservation lock for the BO.
                 */
                r = dma_resv_wait_timeout_rcu(abo->tbo.base.resv, true,
                                                        false,
                                                        msecs_to_jiffies(5000));
                if (unlikely(r <= 0))
                        DRM_ERROR("Waiting for fences timed out!");

                /*
                 * TODO This might fail and hence better not used, wait
                 * explicitly on fences instead
                 * and in general should be called for
                 * blocking commit to as per framework helpers
                 */
                r = amdgpu_bo_reserve(abo, true);
                if (unlikely(r != 0))
                        DRM_ERROR("failed to reserve buffer before flip\n");

                amdgpu_bo_get_tiling_flags(abo, &tiling_flags);

                amdgpu_bo_unreserve(abo);

                fill_dc_plane_info_and_addr(
                        dm->adev, new_plane_state, tiling_flags,
                        &bundle->plane_infos[planes_count],
                        &bundle->flip_addrs[planes_count].address);

                bundle->surface_updates[planes_count].plane_info =
                        &bundle->plane_infos[planes_count];

                /*
                 * Only allow immediate flips for fast updates that don't
                 * change FB pitch, DCC state, rotation or mirroing.
                 */
                bundle->flip_addrs[planes_count].flip_immediate =
                        crtc->state->async_flip &&
                        acrtc_state->update_type == UPDATE_TYPE_FAST;

                timestamp_ns = ktime_get_ns();
                bundle->flip_addrs[planes_count].flip_timestamp_in_us = div_u64(timestamp_ns, 1000);
                bundle->surface_updates[planes_count].flip_addr = &bundle->flip_addrs[planes_count];
                bundle->surface_updates[planes_count].surface = dc_plane;

                if (!bundle->surface_updates[planes_count].surface) {
                        DRM_ERROR("No surface for CRTC: id=%d\n",
                                        acrtc_attach->crtc_id);
                        continue;
                }

                if (plane == pcrtc->primary)
                        update_freesync_state_on_stream(
                                dm,
                                acrtc_state,
                                acrtc_state->stream,
                                dc_plane,
                                bundle->flip_addrs[planes_count].flip_timestamp_in_us);

                DRM_DEBUG_DRIVER("%s Flipping to hi: 0x%x, low: 0x%x\n",
                                 __func__,
                                 bundle->flip_addrs[planes_count].address.grph.addr.high_part,
                                 bundle->flip_addrs[planes_count].address.grph.addr.low_part);

                planes_count += 1;

        }

        if (pflip_present) {
                if (!vrr_active) {
                        /* Use old throttling in non-vrr fixed refresh rate mode
                         * to keep flip scheduling based on target vblank counts
                         * working in a backwards compatible way, e.g., for
                         * clients using the GLX_OML_sync_control extension or
                         * DRI3/Present extension with defined target_msc.
                         */
                        last_flip_vblank = amdgpu_get_vblank_counter_kms(dm->ddev, acrtc_attach->crtc_id);
                }
                else {
                        /* For variable refresh rate mode only:
                         * Get vblank of last completed flip to avoid > 1 vrr
                         * flips per video frame by use of throttling, but allow
                         * flip programming anywhere in the possibly large
                         * variable vrr vblank interval for fine-grained flip
                         * timing control and more opportunity to avoid stutter
                         * on late submission of flips.
                         */
                        spin_lock_irqsave(&pcrtc->dev->event_lock, flags);
                        last_flip_vblank = acrtc_attach->last_flip_vblank;
                        spin_unlock_irqrestore(&pcrtc->dev->event_lock, flags);
                }

                target_vblank = last_flip_vblank + wait_for_vblank;

                /*
                 * Wait until we're out of the vertical blank period before the one
                 * targeted by the flip
                 */
                while ((acrtc_attach->enabled &&
                        (amdgpu_display_get_crtc_scanoutpos(dm->ddev, acrtc_attach->crtc_id,
                                                            0, &vpos, &hpos, NULL,
                                                            NULL, &pcrtc->hwmode)
                         & (DRM_SCANOUTPOS_VALID | DRM_SCANOUTPOS_IN_VBLANK)) ==
                        (DRM_SCANOUTPOS_VALID | DRM_SCANOUTPOS_IN_VBLANK) &&
                        (int)(target_vblank -
                          amdgpu_get_vblank_counter_kms(dm->ddev, acrtc_attach->crtc_id)) > 0)) {
                        usleep_range(1000, 1100);
                }

                if (acrtc_attach->base.state->event) {
                        drm_crtc_vblank_get(pcrtc);

                        spin_lock_irqsave(&pcrtc->dev->event_lock, flags);

                        WARN_ON(acrtc_attach->pflip_status != AMDGPU_FLIP_NONE);
                        prepare_flip_isr(acrtc_attach);

                        spin_unlock_irqrestore(&pcrtc->dev->event_lock, flags);
                }

                if (acrtc_state->stream) {
                        if (acrtc_state->freesync_vrr_info_changed)
                                bundle->stream_update.vrr_infopacket =
                                        &acrtc_state->stream->vrr_infopacket;
                }
        }

        /* Update the planes if changed or disable if we don't have any. */
        if ((planes_count || acrtc_state->active_planes == 0) &&
                acrtc_state->stream) {
                bundle->stream_update.stream = acrtc_state->stream;
                if (new_pcrtc_state->mode_changed) {
                        bundle->stream_update.src = acrtc_state->stream->src;
                        bundle->stream_update.dst = acrtc_state->stream->dst;
                }

                if (new_pcrtc_state->color_mgmt_changed) {
                        /*
                         * TODO: This isn't fully correct since we've actually
                         * already modified the stream in place.
                         */
                        bundle->stream_update.gamut_remap =
                                &acrtc_state->stream->gamut_remap_matrix;
                        bundle->stream_update.output_csc_transform =
                                &acrtc_state->stream->csc_color_matrix;
                        bundle->stream_update.out_transfer_func =
                                acrtc_state->stream->out_transfer_func;
                }

                acrtc_state->stream->abm_level = acrtc_state->abm_level;
                if (acrtc_state->abm_level != dm_old_crtc_state->abm_level)
                        bundle->stream_update.abm_level = &acrtc_state->abm_level;

                /*
                 * If FreeSync state on the stream has changed then we need to
                 * re-adjust the min/max bounds now that DC doesn't handle this
                 * as part of commit.
                 */
                if (amdgpu_dm_vrr_active(dm_old_crtc_state) !=
                    amdgpu_dm_vrr_active(acrtc_state)) {
                        spin_lock_irqsave(&pcrtc->dev->event_lock, flags);
                        dc_stream_adjust_vmin_vmax(
                                dm->dc, acrtc_state->stream,
                                &acrtc_state->vrr_params.adjust);
                        spin_unlock_irqrestore(&pcrtc->dev->event_lock, flags);
                }
                mutex_lock(&dm->dc_lock);
                if ((acrtc_state->update_type > UPDATE_TYPE_FAST) &&
                                acrtc_state->stream->link->psr_allow_active)
                        amdgpu_dm_psr_disable(acrtc_state->stream);

                dc_commit_updates_for_stream(dm->dc,
                                                     bundle->surface_updates,
                                                     planes_count,
                                                     acrtc_state->stream,
                                                     &bundle->stream_update,
                                                     dc_state);

                if ((acrtc_state->update_type > UPDATE_TYPE_FAST) &&
                                                acrtc_state->stream->psr_version &&
                                                !acrtc_state->stream->link->psr_feature_enabled)
                        amdgpu_dm_link_setup_psr(acrtc_state->stream);
                else if ((acrtc_state->update_type == UPDATE_TYPE_FAST) &&
                                                acrtc_state->stream->link->psr_feature_enabled &&
                                                !acrtc_state->stream->link->psr_allow_active &&
                                                swizzle) {
                        amdgpu_dm_psr_enable(acrtc_state->stream);
                }

                mutex_unlock(&dm->dc_lock);
        }

        /*
         * Update cursor state *after* programming all the planes.
         * This avoids redundant programming in the case where we're going
         * to be disabling a single plane - those pipes are being disabled.
         */
        if (acrtc_state->active_planes)
                amdgpu_dm_commit_cursors(state);

cleanup:
        kfree(bundle);
}

static void amdgpu_dm_commit_audio(struct drm_device *dev,
                                   struct drm_atomic_state *state)
{
        struct amdgpu_device *adev = dev->dev_private;
        struct amdgpu_dm_connector *aconnector;
        struct drm_connector *connector;
        struct drm_connector_state *old_con_state, *new_con_state;
        struct drm_crtc_state *new_crtc_state;
        struct dm_crtc_state *new_dm_crtc_state;
        const struct dc_stream_status *status;
        int i, inst;

        /* Notify device removals. */
        for_each_oldnew_connector_in_state(state, connector, old_con_state, new_con_state, i) {
                if (old_con_state->crtc != new_con_state->crtc) {
                        /* CRTC changes require notification. */
                        goto notify;
                }

                if (!new_con_state->crtc)
                        continue;

                new_crtc_state = drm_atomic_get_new_crtc_state(
                        state, new_con_state->crtc);

                if (!new_crtc_state)
                        continue;

                if (!drm_atomic_crtc_needs_modeset(new_crtc_state))
                        continue;

        notify:
                aconnector = to_amdgpu_dm_connector(connector);

                mutex_lock(&adev->dm.audio_lock);
                inst = aconnector->audio_inst;
                aconnector->audio_inst = -1;
                mutex_unlock(&adev->dm.audio_lock);

                amdgpu_dm_audio_eld_notify(adev, inst);
        }

        /* Notify audio device additions. */
        for_each_new_connector_in_state(state, connector, new_con_state, i) {
                if (!new_con_state->crtc)
                        continue;

                new_crtc_state = drm_atomic_get_new_crtc_state(
                        state, new_con_state->crtc);

                if (!new_crtc_state)
                        continue;

                if (!drm_atomic_crtc_needs_modeset(new_crtc_state))
                        continue;

                new_dm_crtc_state = to_dm_crtc_state(new_crtc_state);
                if (!new_dm_crtc_state->stream)
                        continue;

                status = dc_stream_get_status(new_dm_crtc_state->stream);
                if (!status)
                        continue;

                aconnector = to_amdgpu_dm_connector(connector);

                mutex_lock(&adev->dm.audio_lock);
                inst = status->audio_inst;
                aconnector->audio_inst = inst;
                mutex_unlock(&adev->dm.audio_lock);

                amdgpu_dm_audio_eld_notify(adev, inst);
        }
}

/*
 * Enable interrupts on CRTCs that are newly active, undergone
 * a modeset, or have active planes again.
 *
 * Done in two passes, based on the for_modeset flag:
 * Pass 1: For CRTCs going through modeset
 * Pass 2: For CRTCs going from 0 to n active planes
 *
 * Interrupts can only be enabled after the planes are programmed,
 * so this requires a two-pass approach since we don't want to
 * just defer the interrupts until after commit planes every time.
 */
static void amdgpu_dm_enable_crtc_interrupts(struct drm_device *dev,
                                             struct drm_atomic_state *state,
                                             bool for_modeset)
{
        struct amdgpu_device *adev = dev->dev_private;
        struct drm_crtc *crtc;
        struct drm_crtc_state *old_crtc_state, *new_crtc_state;
        int i;
#ifdef CONFIG_DEBUG_FS
        enum amdgpu_dm_pipe_crc_source source;
#endif

        for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state,
                                      new_crtc_state, i) {
                struct amdgpu_crtc *acrtc = to_amdgpu_crtc(crtc);
                struct dm_crtc_state *dm_new_crtc_state =
                        to_dm_crtc_state(new_crtc_state);
                struct dm_crtc_state *dm_old_crtc_state =
                        to_dm_crtc_state(old_crtc_state);
                bool modeset = drm_atomic_crtc_needs_modeset(new_crtc_state);
                bool run_pass;

                run_pass = (for_modeset && modeset) ||
                           (!for_modeset && !modeset &&
                            !dm_old_crtc_state->interrupts_enabled);

                if (!run_pass)
                        continue;

                if (!dm_new_crtc_state->interrupts_enabled)
                        continue;

                manage_dm_interrupts(adev, acrtc, true);

#ifdef CONFIG_DEBUG_FS
                /* The stream has changed so CRC capture needs to re-enabled. */
                source = dm_new_crtc_state->crc_src;
                if (amdgpu_dm_is_valid_crc_source(source)) {
                        amdgpu_dm_crtc_configure_crc_source(
                                crtc, dm_new_crtc_state,
                                dm_new_crtc_state->crc_src);
                }
#endif
        }
}

/*
 * amdgpu_dm_crtc_copy_transient_flags - copy mirrored flags from DRM to DC
 * @crtc_state: the DRM CRTC state
 * @stream_state: the DC stream state.
 *
 * Copy the mirrored transient state flags from DRM, to DC. It is used to bring
 * a dc_stream_state's flags in sync with a drm_crtc_state's flags.
 */
static void amdgpu_dm_crtc_copy_transient_flags(struct drm_crtc_state *crtc_state,
                                                struct dc_stream_state *stream_state)
{
        stream_state->mode_changed = drm_atomic_crtc_needs_modeset(crtc_state);
}

static int amdgpu_dm_atomic_commit(struct drm_device *dev,
                                   struct drm_atomic_state *state,
                                   bool nonblock)
{
        struct drm_crtc *crtc;
        struct drm_crtc_state *old_crtc_state, *new_crtc_state;
        struct amdgpu_device *adev = dev->dev_private;
        int i;

        /*
         * We evade vblank and pflip interrupts on CRTCs that are undergoing
         * a modeset, being disabled, or have no active planes.
         *
         * It's done in atomic commit rather than commit tail for now since
         * some of these interrupt handlers access the current CRTC state and
         * potentially the stream pointer itself.
         *
         * Since the atomic state is swapped within atomic commit and not within
         * commit tail this would leave to new state (that hasn't been committed yet)
         * being accesssed from within the handlers.
         *
         * TODO: Fix this so we can do this in commit tail and not have to block
         * in atomic check.
         */
        for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) {
                struct dm_crtc_state *dm_old_crtc_state = to_dm_crtc_state(old_crtc_state);
                struct dm_crtc_state *dm_new_crtc_state = to_dm_crtc_state(new_crtc_state);
                struct amdgpu_crtc *acrtc = to_amdgpu_crtc(crtc);

                if (dm_old_crtc_state->interrupts_enabled &&
                    (!dm_new_crtc_state->interrupts_enabled ||
                     drm_atomic_crtc_needs_modeset(new_crtc_state)))
                        manage_dm_interrupts(adev, acrtc, false);
        }
        /*
         * Add check here for SoC's that support hardware cursor plane, to
         * unset legacy_cursor_update
         */

        return drm_atomic_helper_commit(dev, state, nonblock);

        /*TODO Handle EINTR, reenable IRQ*/
}

/**
 * amdgpu_dm_atomic_commit_tail() - AMDgpu DM's commit tail implementation.
 * @state: The atomic state to commit
 *
 * This will tell DC to commit the constructed DC state from atomic_check,
 * programming the hardware. Any failures here implies a hardware failure, since
 * atomic check should have filtered anything non-kosher.
 */
static void amdgpu_dm_atomic_commit_tail(struct drm_atomic_state *state)
{
        struct drm_device *dev = state->dev;
        struct amdgpu_device *adev = dev->dev_private;
        struct amdgpu_display_manager *dm = &adev->dm;
        struct dm_atomic_state *dm_state;
        struct dc_state *dc_state = NULL, *dc_state_temp = NULL;
        uint32_t i, j;
        struct drm_crtc *crtc;
        struct drm_crtc_state *old_crtc_state, *new_crtc_state;
        unsigned long flags;
        bool wait_for_vblank = true;
        struct drm_connector *connector;
        struct drm_connector_state *old_con_state, *new_con_state;
        struct dm_crtc_state *dm_old_crtc_state, *dm_new_crtc_state;
        int crtc_disable_count = 0;

        drm_atomic_helper_update_legacy_modeset_state(dev, state);

        dm_state = dm_atomic_get_new_state(state);
        if (dm_state && dm_state->context) {
                dc_state = dm_state->context;
        } else {
                /* No state changes, retain current state. */
                dc_state_temp = dc_create_state(dm->dc);
                ASSERT(dc_state_temp);
                dc_state = dc_state_temp;
                dc_resource_state_copy_construct_current(dm->dc, dc_state);
        }

        /* update changed items */
        for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) {
                struct amdgpu_crtc *acrtc = to_amdgpu_crtc(crtc);

                dm_new_crtc_state = to_dm_crtc_state(new_crtc_state);
                dm_old_crtc_state = to_dm_crtc_state(old_crtc_state);

                DRM_DEBUG_DRIVER(
                        "amdgpu_crtc id:%d crtc_state_flags: enable:%d, active:%d, "
                        "planes_changed:%d, mode_changed:%d,active_changed:%d,"
                        "connectors_changed:%d\n",
                        acrtc->crtc_id,
                        new_crtc_state->enable,
                        new_crtc_state->active,
                        new_crtc_state->planes_changed,
                        new_crtc_state->mode_changed,
                        new_crtc_state->active_changed,
                        new_crtc_state->connectors_changed);

                /* Copy all transient state flags into dc state */
                if (dm_new_crtc_state->stream) {
                        amdgpu_dm_crtc_copy_transient_flags(&dm_new_crtc_state->base,
                                                            dm_new_crtc_state->stream);
                }

                /* handles headless hotplug case, updating new_state and
                 * aconnector as needed
                 */

                if (modeset_required(new_crtc_state, dm_new_crtc_state->stream, dm_old_crtc_state->stream)) {

                        DRM_DEBUG_DRIVER("Atomic commit: SET crtc id %d: [%p]\n", acrtc->crtc_id, acrtc);

                        if (!dm_new_crtc_state->stream) {
                                /*
                                 * this could happen because of issues with
                                 * userspace notifications delivery.
                                 * In this case userspace tries to set mode on
                                 * display which is disconnected in fact.
                                 * dc_sink is NULL in this case on aconnector.
                                 * We expect reset mode will come soon.
                                 *
                                 * This can also happen when unplug is done
                                 * during resume sequence ended
                                 *
                                 * In this case, we want to pretend we still
                                 * have a sink to keep the pipe running so that
                                 * hw state is consistent with the sw state
                                 */
                                DRM_DEBUG_DRIVER("%s: Failed to create new stream for crtc %d\n",
                                                __func__, acrtc->base.base.id);
                                continue;
                        }

                        if (dm_old_crtc_state->stream)
                                remove_stream(adev, acrtc, dm_old_crtc_state->stream);

                        pm_runtime_get_noresume(dev->dev);

                        acrtc->enabled = true;
                        acrtc->hw_mode = new_crtc_state->mode;
                        crtc->hwmode = new_crtc_state->mode;
                } else if (modereset_required(new_crtc_state)) {
                        DRM_DEBUG_DRIVER("Atomic commit: RESET. crtc id %d:[%p]\n", acrtc->crtc_id, acrtc);
                        /* i.e. reset mode */
                        if (dm_old_crtc_state->stream) {
                                if (dm_old_crtc_state->stream->link->psr_allow_active)
                                        amdgpu_dm_psr_disable(dm_old_crtc_state->stream);

                                remove_stream(adev, acrtc, dm_old_crtc_state->stream);
                        }
                }
        } /* for_each_crtc_in_state() */

        if (dc_state) {
                dm_enable_per_frame_crtc_master_sync(dc_state);
                mutex_lock(&dm->dc_lock);
                WARN_ON(!dc_commit_state(dm->dc, dc_state));
                mutex_unlock(&dm->dc_lock);
        }

        for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) {
                struct amdgpu_crtc *acrtc = to_amdgpu_crtc(crtc);

                dm_new_crtc_state = to_dm_crtc_state(new_crtc_state);

                if (dm_new_crtc_state->stream != NULL) {
                        const struct dc_stream_status *status =
                                        dc_stream_get_status(dm_new_crtc_state->stream);

                        if (!status)
                                status = dc_stream_get_status_from_state(dc_state,
                                                                         dm_new_crtc_state->stream);

                        if (!status)
                                DC_ERR("got no status for stream %p on acrtc%p\n", dm_new_crtc_state->stream, acrtc);
                        else
                                acrtc->otg_inst = status->primary_otg_inst;
                }
        }
#ifdef CONFIG_DRM_AMD_DC_HDCP
        for_each_oldnew_connector_in_state(state, connector, old_con_state, new_con_state, i) {
                struct dm_connector_state *dm_new_con_state = to_dm_connector_state(new_con_state);
                struct amdgpu_crtc *acrtc = to_amdgpu_crtc(dm_new_con_state->base.crtc);
                struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(connector);

                new_crtc_state = NULL;

                if (acrtc)
                        new_crtc_state = drm_atomic_get_new_crtc_state(state, &acrtc->base);

                dm_new_crtc_state = to_dm_crtc_state(new_crtc_state);

                if (dm_new_crtc_state && dm_new_crtc_state->stream == NULL &&
                    connector->state->content_protection == DRM_MODE_CONTENT_PROTECTION_ENABLED) {
                        hdcp_reset_display(adev->dm.hdcp_workqueue, aconnector->dc_link->link_index);
                        new_con_state->content_protection = DRM_MODE_CONTENT_PROTECTION_DESIRED;
                        continue;
                }

                if (is_content_protection_different(new_con_state, old_con_state, connector, adev->dm.hdcp_workqueue))
                        hdcp_update_display(
                                adev->dm.hdcp_workqueue, aconnector->dc_link->link_index, aconnector,
                                new_con_state->hdcp_content_type,
                                new_con_state->content_protection == DRM_MODE_CONTENT_PROTECTION_DESIRED ? true
                                                                                                         : false);
        }
#endif

        /* Handle connector state changes */
        for_each_oldnew_connector_in_state(state, connector, old_con_state, new_con_state, i) {
                struct dm_connector_state *dm_new_con_state = to_dm_connector_state(new_con_state);
                struct dm_connector_state *dm_old_con_state = to_dm_connector_state(old_con_state);
                struct amdgpu_crtc *acrtc = to_amdgpu_crtc(dm_new_con_state->base.crtc);
                struct dc_surface_update dummy_updates[MAX_SURFACES];
                struct dc_stream_update stream_update;
                struct dc_info_packet hdr_packet;
                struct dc_stream_status *status = NULL;
                bool abm_changed, hdr_changed, scaling_changed;

                memset(&dummy_updates, 0, sizeof(dummy_updates));
                memset(&stream_update, 0, sizeof(stream_update));

                if (acrtc) {
                        new_crtc_state = drm_atomic_get_new_crtc_state(state, &acrtc->base);
                        old_crtc_state = drm_atomic_get_old_crtc_state(state, &acrtc->base);
                }

                /* Skip any modesets/resets */
                if (!acrtc || drm_atomic_crtc_needs_modeset(new_crtc_state))
                        continue;

                dm_new_crtc_state = to_dm_crtc_state(new_crtc_state);
                dm_old_crtc_state = to_dm_crtc_state(old_crtc_state);

                scaling_changed = is_scaling_state_different(dm_new_con_state,
                                                             dm_old_con_state);

                abm_changed = dm_new_crtc_state->abm_level !=
                              dm_old_crtc_state->abm_level;

                hdr_changed =
                        is_hdr_metadata_different(old_con_state, new_con_state);

                if (!scaling_changed && !abm_changed && !hdr_changed)
                        continue;

                stream_update.stream = dm_new_crtc_state->stream;
                if (scaling_changed) {
                        update_stream_scaling_settings(&dm_new_con_state->base.crtc->mode,
                                        dm_new_con_state, dm_new_crtc_state->stream);

                        stream_update.src = dm_new_crtc_state->stream->src;
                        stream_update.dst = dm_new_crtc_state->stream->dst;
                }

                if (abm_changed) {
                        dm_new_crtc_state->stream->abm_level = dm_new_crtc_state->abm_level;

                        stream_update.abm_level = &dm_new_crtc_state->abm_level;
                }

                if (hdr_changed) {
                        fill_hdr_info_packet(new_con_state, &hdr_packet);
                        stream_update.hdr_static_metadata = &hdr_packet;
                }

                status = dc_stream_get_status(dm_new_crtc_state->stream);
                WARN_ON(!status);
                WARN_ON(!status->plane_count);

                /*
                 * TODO: DC refuses to perform stream updates without a dc_surface_update.
                 * Here we create an empty update on each plane.
                 * To fix this, DC should permit updating only stream properties.
                 */
                for (j = 0; j < status->plane_count; j++)
                        dummy_updates[j].surface = status->plane_states[0];


                mutex_lock(&dm->dc_lock);
                dc_commit_updates_for_stream(dm->dc,
                                                     dummy_updates,
                                                     status->plane_count,
                                                     dm_new_crtc_state->stream,
                                                     &stream_update,
                                                     dc_state);
                mutex_unlock(&dm->dc_lock);
        }

        /* Count number of newly disabled CRTCs for dropping PM refs later. */
        for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state,
                                      new_crtc_state, i) {
                if (old_crtc_state->active && !new_crtc_state->active)
                        crtc_disable_count++;

                dm_new_crtc_state = to_dm_crtc_state(new_crtc_state);
                dm_old_crtc_state = to_dm_crtc_state(old_crtc_state);

                /* Update freesync active state. */
                pre_update_freesync_state_on_stream(dm, dm_new_crtc_state);

                /* Handle vrr on->off / off->on transitions */
                amdgpu_dm_handle_vrr_transition(dm_old_crtc_state,
                                                dm_new_crtc_state);
        }

        /* Enable interrupts for CRTCs going through a modeset. */
        amdgpu_dm_enable_crtc_interrupts(dev, state, true);

        for_each_new_crtc_in_state(state, crtc, new_crtc_state, j)
                if (new_crtc_state->async_flip)
                        wait_for_vblank = false;

        /* update planes when needed per crtc*/
        for_each_new_crtc_in_state(state, crtc, new_crtc_state, j) {
                dm_new_crtc_state = to_dm_crtc_state(new_crtc_state);

                if (dm_new_crtc_state->stream)
                        amdgpu_dm_commit_planes(state, dc_state, dev,
                                                dm, crtc, wait_for_vblank);
        }

        /* Enable interrupts for CRTCs going from 0 to n active planes. */
        amdgpu_dm_enable_crtc_interrupts(dev, state, false);

        /* Update audio instances for each connector. */
        amdgpu_dm_commit_audio(dev, state);

        /*
         * send vblank event on all events not handled in flip and
         * mark consumed event for drm_atomic_helper_commit_hw_done
         */
        spin_lock_irqsave(&adev->ddev->event_lock, flags);
        for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) {

                if (new_crtc_state->event)
                        drm_send_event_locked(dev, &new_crtc_state->event->base);

                new_crtc_state->event = NULL;
        }
        spin_unlock_irqrestore(&adev->ddev->event_lock, flags);

        /* Signal HW programming completion */
        drm_atomic_helper_commit_hw_done(state);

        if (wait_for_vblank)
                drm_atomic_helper_wait_for_flip_done(dev, state);

        drm_atomic_helper_cleanup_planes(dev, state);

        /*
         * Finally, drop a runtime PM reference for each newly disabled CRTC,
         * so we can put the GPU into runtime suspend if we're not driving any
         * displays anymore
         */
        for (i = 0; i < crtc_disable_count; i++)
                pm_runtime_put_autosuspend(dev->dev);
        pm_runtime_mark_last_busy(dev->dev);

        if (dc_state_temp)
                dc_release_state(dc_state_temp);
}


static int dm_force_atomic_commit(struct drm_connector *connector)
{
        int ret = 0;
        struct drm_device *ddev = connector->dev;
        struct drm_atomic_state *state = drm_atomic_state_alloc(ddev);
        struct amdgpu_crtc *disconnected_acrtc = to_amdgpu_crtc(connector->encoder->crtc);
        struct drm_plane *plane = disconnected_acrtc->base.primary;
        struct drm_connector_state *conn_state;
        struct drm_crtc_state *crtc_state;
        struct drm_plane_state *plane_state;

        if (!state)
                return -ENOMEM;

        state->acquire_ctx = ddev->mode_config.acquire_ctx;

        /* Construct an atomic state to restore previous display setting */

        /*
         * Attach connectors to drm_atomic_state
         */
        conn_state = drm_atomic_get_connector_state(state, connector);

        ret = PTR_ERR_OR_ZERO(conn_state);
        if (ret)
                goto err;

        /* Attach crtc to drm_atomic_state*/
        crtc_state = drm_atomic_get_crtc_state(state, &disconnected_acrtc->base);

        ret = PTR_ERR_OR_ZERO(crtc_state);
        if (ret)
                goto err;

        /* force a restore */
        crtc_state->mode_changed = true;

        /* Attach plane to drm_atomic_state */
        plane_state = drm_atomic_get_plane_state(state, plane);

        ret = PTR_ERR_OR_ZERO(plane_state);
        if (ret)
                goto err;


        /* Call commit internally with the state we just constructed */
        ret = drm_atomic_commit(state);
        if (!ret)
                return 0;

err:
        DRM_ERROR("Restoring old state failed with %i\n", ret);
        drm_atomic_state_put(state);

        return ret;
}

/*
 * This function handles all cases when set mode does not come upon hotplug.
 * This includes when a display is unplugged then plugged back into the
 * same port and when running without usermode desktop manager supprot
 */
void dm_restore_drm_connector_state(struct drm_device *dev,
                                    struct drm_connector *connector)
{
        struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(connector);
        struct amdgpu_crtc *disconnected_acrtc;
        struct dm_crtc_state *acrtc_state;

        if (!aconnector->dc_sink || !connector->state || !connector->encoder)
                return;

        disconnected_acrtc = to_amdgpu_crtc(connector->encoder->crtc);
        if (!disconnected_acrtc)
                return;

        acrtc_state = to_dm_crtc_state(disconnected_acrtc->base.state);
        if (!acrtc_state->stream)
                return;

        /*
         * If the previous sink is not released and different from the current,
         * we deduce we are in a state where we can not rely on usermode call
         * to turn on the display, so we do it here
         */
        if (acrtc_state->stream->sink != aconnector->dc_sink)
                dm_force_atomic_commit(&aconnector->base);
}

/*
 * Grabs all modesetting locks to serialize against any blocking commits,
 * Waits for completion of all non blocking commits.
 */
static int do_aquire_global_lock(struct drm_device *dev,
                                 struct drm_atomic_state *state)
{
        struct drm_crtc *crtc;
        struct drm_crtc_commit *commit;
        long ret;

        /*
         * Adding all modeset locks to aquire_ctx will
         * ensure that when the framework release it the
         * extra locks we are locking here will get released to
         */
        ret = drm_modeset_lock_all_ctx(dev, state->acquire_ctx);
        if (ret)
                return ret;

        list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
                spin_lock(&crtc->commit_lock);
                commit = list_first_entry_or_null(&crtc->commit_list,
                                struct drm_crtc_commit, commit_entry);
                if (commit)
                        drm_crtc_commit_get(commit);
                spin_unlock(&crtc->commit_lock);

                if (!commit)
                        continue;

                /*
                 * Make sure all pending HW programming completed and
                 * page flips done
                 */
                ret = wait_for_completion_interruptible_timeout(&commit->hw_done, 10*HZ);

                if (ret > 0)
                        ret = wait_for_completion_interruptible_timeout(
                                        &commit->flip_done, 10*HZ);

                if (ret == 0)
                        DRM_ERROR("[CRTC:%d:%s] hw_done or flip_done "
                                  "timed out\n", crtc->base.id, crtc->name);

                drm_crtc_commit_put(commit);
        }

        return ret < 0 ? ret : 0;
}

static void get_freesync_config_for_crtc(
        struct dm_crtc_state *new_crtc_state,
        struct dm_connector_state *new_con_state)
{
        struct mod_freesync_config config = {0};
        struct amdgpu_dm_connector *aconnector =
                        to_amdgpu_dm_connector(new_con_state->base.connector);
        struct drm_display_mode *mode = &new_crtc_state->base.mode;
        int vrefresh = drm_mode_vrefresh(mode);

        new_crtc_state->vrr_supported = new_con_state->freesync_capable &&
                                        vrefresh >= aconnector->min_vfreq &&
                                        vrefresh <= aconnector->max_vfreq;

        if (new_crtc_state->vrr_supported) {
                new_crtc_state->stream->ignore_msa_timing_param = true;
                config.state = new_crtc_state->base.vrr_enabled ?
                                VRR_STATE_ACTIVE_VARIABLE :
                                VRR_STATE_INACTIVE;
                config.min_refresh_in_uhz =
                                aconnector->min_vfreq * 1000000;
                config.max_refresh_in_uhz =
                                aconnector->max_vfreq * 1000000;
                config.vsif_supported = true;
                config.btr = true;
        }

        new_crtc_state->freesync_config = config;
}

static void reset_freesync_config_for_crtc(
        struct dm_crtc_state *new_crtc_state)
{
        new_crtc_state->vrr_supported = false;

        memset(&new_crtc_state->vrr_params, 0,
               sizeof(new_crtc_state->vrr_params));
        memset(&new_crtc_state->vrr_infopacket, 0,
               sizeof(new_crtc_state->vrr_infopacket));
}

static int dm_update_crtc_state(struct amdgpu_display_manager *dm,
                                struct drm_atomic_state *state,
                                struct drm_crtc *crtc,
                                struct drm_crtc_state *old_crtc_state,
                                struct drm_crtc_state *new_crtc_state,
                                bool enable,
                                bool *lock_and_validation_needed)
{
        struct dm_atomic_state *dm_state = NULL;
        struct dm_crtc_state *dm_old_crtc_state, *dm_new_crtc_state;
        struct dc_stream_state *new_stream;
        int ret = 0;

        /*
         * TODO Move this code into dm_crtc_atomic_check once we get rid of dc_validation_set
         * update changed items
         */
        struct amdgpu_crtc *acrtc = NULL;
        struct amdgpu_dm_connector *aconnector = NULL;
        struct drm_connector_state *drm_new_conn_state = NULL, *drm_old_conn_state = NULL;
        struct dm_connector_state *dm_new_conn_state = NULL, *dm_old_conn_state = NULL;

        new_stream = NULL;

        dm_old_crtc_state = to_dm_crtc_state(old_crtc_state);
        dm_new_crtc_state = to_dm_crtc_state(new_crtc_state);
        acrtc = to_amdgpu_crtc(crtc);
        aconnector = amdgpu_dm_find_first_crtc_matching_connector(state, crtc);

        /* TODO This hack should go away */
        if (aconnector && enable) {
                /* Make sure fake sink is created in plug-in scenario */
                drm_new_conn_state = drm_atomic_get_new_connector_state(state,
                                                            &aconnector->base);
                drm_old_conn_state = drm_atomic_get_old_connector_state(state,
                                                            &aconnector->base);

                if (IS_ERR(drm_new_conn_state)) {
                        ret = PTR_ERR_OR_ZERO(drm_new_conn_state);
                        goto fail;
                }

                dm_new_conn_state = to_dm_connector_state(drm_new_conn_state);
                dm_old_conn_state = to_dm_connector_state(drm_old_conn_state);

                if (!drm_atomic_crtc_needs_modeset(new_crtc_state))
                        goto skip_modeset;

                new_stream = create_stream_for_sink(aconnector,
                                                     &new_crtc_state->mode,
                                                    dm_new_conn_state,
                                                    dm_old_crtc_state->stream);

                /*
                 * we can have no stream on ACTION_SET if a display
                 * was disconnected during S3, in this case it is not an
                 * error, the OS will be updated after detection, and
                 * will do the right thing on next atomic commit
                 */

                if (!new_stream) {
                        DRM_DEBUG_DRIVER("%s: Failed to create new stream for crtc %d\n",
                                        __func__, acrtc->base.base.id);
                        ret = -ENOMEM;
                        goto fail;
                }

                dm_new_crtc_state->abm_level = dm_new_conn_state->abm_level;

                ret = fill_hdr_info_packet(drm_new_conn_state,
                                           &new_stream->hdr_static_metadata);
                if (ret)
                        goto fail;

                /*
                 * If we already removed the old stream from the context
                 * (and set the new stream to NULL) then we can't reuse
                 * the old stream even if the stream and scaling are unchanged.
                 * We'll hit the BUG_ON and black screen.
                 *
                 * TODO: Refactor this function to allow this check to work
                 * in all conditions.
                 */
                if (dm_new_crtc_state->stream &&
                    dc_is_stream_unchanged(new_stream, dm_old_crtc_state->stream) &&
                    dc_is_stream_scaling_unchanged(new_stream, dm_old_crtc_state->stream)) {
                        new_crtc_state->mode_changed = false;
                        DRM_DEBUG_DRIVER("Mode change not required, setting mode_changed to %d",
                                         new_crtc_state->mode_changed);
                }
        }

        /* mode_changed flag may get updated above, need to check again */
        if (!drm_atomic_crtc_needs_modeset(new_crtc_state))
                goto skip_modeset;

        DRM_DEBUG_DRIVER(
                "amdgpu_crtc id:%d crtc_state_flags: enable:%d, active:%d, "
                "planes_changed:%d, mode_changed:%d,active_changed:%d,"
                "connectors_changed:%d\n",
                acrtc->crtc_id,
                new_crtc_state->enable,
                new_crtc_state->active,
                new_crtc_state->planes_changed,
                new_crtc_state->mode_changed,
                new_crtc_state->active_changed,
                new_crtc_state->connectors_changed);

        /* Remove stream for any changed/disabled CRTC */
        if (!enable) {

                if (!dm_old_crtc_state->stream)
                        goto skip_modeset;

                ret = dm_atomic_get_state(state, &dm_state);
                if (ret)
                        goto fail;

                DRM_DEBUG_DRIVER("Disabling DRM crtc: %d\n",
                                crtc->base.id);

                /* i.e. reset mode */
                if (dc_remove_stream_from_ctx(
                                dm->dc,
                                dm_state->context,
                                dm_old_crtc_state->stream) != DC_OK) {
                        ret = -EINVAL;
                        goto fail;
                }

                dc_stream_release(dm_old_crtc_state->stream);
                dm_new_crtc_state->stream = NULL;

                reset_freesync_config_for_crtc(dm_new_crtc_state);

                *lock_and_validation_needed = true;

        } else {/* Add stream for any updated/enabled CRTC */
                /*
                 * Quick fix to prevent NULL pointer on new_stream when
                 * added MST connectors not found in existing crtc_state in the chained mode
                 * TODO: need to dig out the root cause of that
                 */
                if (!aconnector || (!aconnector->dc_sink && aconnector->mst_port))
                        goto skip_modeset;

                if (modereset_required(new_crtc_state))
                        goto skip_modeset;

                if (modeset_required(new_crtc_state, new_stream,
                                     dm_old_crtc_state->stream)) {

                        WARN_ON(dm_new_crtc_state->stream);

                        ret = dm_atomic_get_state(state, &dm_state);
                        if (ret)
                                goto fail;

                        dm_new_crtc_state->stream = new_stream;

                        dc_stream_retain(new_stream);

                        DRM_DEBUG_DRIVER("Enabling DRM crtc: %d\n",
                                                crtc->base.id);

                        if (dc_add_stream_to_ctx(
                                        dm->dc,
                                        dm_state->context,
                                        dm_new_crtc_state->stream) != DC_OK) {
                                ret = -EINVAL;
                                goto fail;
                        }

                        *lock_and_validation_needed = true;
                }
        }

skip_modeset:
        /* Release extra reference */
        if (new_stream)
                 dc_stream_release(new_stream);

        /*
         * We want to do dc stream updates that do not require a
         * full modeset below.
         */
        if (!(enable && aconnector && new_crtc_state->enable &&
              new_crtc_state->active))
                return 0;
        /*
         * Given above conditions, the dc state cannot be NULL because:
         * 1. We're in the process of enabling CRTCs (just been added
         *    to the dc context, or already is on the context)
         * 2. Has a valid connector attached, and
         * 3. Is currently active and enabled.
         * => The dc stream state currently exists.
         */
        BUG_ON(dm_new_crtc_state->stream == NULL);

        /* Scaling or underscan settings */
        if (is_scaling_state_different(dm_old_conn_state, dm_new_conn_state))
                update_stream_scaling_settings(
                        &new_crtc_state->mode, dm_new_conn_state, dm_new_crtc_state->stream);

        /* ABM settings */
        dm_new_crtc_state->abm_level = dm_new_conn_state->abm_level;

        /*
         * Color management settings. We also update color properties
         * when a modeset is needed, to ensure it gets reprogrammed.
         */
        if (dm_new_crtc_state->base.color_mgmt_changed ||
            drm_atomic_crtc_needs_modeset(new_crtc_state)) {
                ret = amdgpu_dm_update_crtc_color_mgmt(dm_new_crtc_state);
                if (ret)
                        goto fail;
        }

        /* Update Freesync settings. */
        get_freesync_config_for_crtc(dm_new_crtc_state,
                                     dm_new_conn_state);

        return ret;

fail:
        if (new_stream)
                dc_stream_release(new_stream);
        return ret;
}

static bool should_reset_plane(struct drm_atomic_state *state,
                               struct drm_plane *plane,
                               struct drm_plane_state *old_plane_state,
                               struct drm_plane_state *new_plane_state)
{
        struct drm_plane *other;
        struct drm_plane_state *old_other_state, *new_other_state;
        struct drm_crtc_state *new_crtc_state;
        int i;

        /*
         * TODO: Remove this hack once the checks below are sufficient
         * enough to determine when we need to reset all the planes on
         * the stream.
         */
        if (state->allow_modeset)
                return true;

        /* Exit early if we know that we're adding or removing the plane. */
        if (old_plane_state->crtc != new_plane_state->crtc)
                return true;

        /* old crtc == new_crtc == NULL, plane not in context. */
        if (!new_plane_state->crtc)
                return false;

        new_crtc_state =
                drm_atomic_get_new_crtc_state(state, new_plane_state->crtc);

        if (!new_crtc_state)
                return true;

        /* CRTC Degamma changes currently require us to recreate planes. */
        if (new_crtc_state->color_mgmt_changed)
                return true;

        if (drm_atomic_crtc_needs_modeset(new_crtc_state))
                return true;

        /*
         * If there are any new primary or overlay planes being added or
         * removed then the z-order can potentially change. To ensure
         * correct z-order and pipe acquisition the current DC architecture
         * requires us to remove and recreate all existing planes.
         *
         * TODO: Come up with a more elegant solution for this.
         */
        for_each_oldnew_plane_in_state(state, other, old_other_state, new_other_state, i) {
                if (other->type == DRM_PLANE_TYPE_CURSOR)
                        continue;

                if (old_other_state->crtc != new_plane_state->crtc &&
                    new_other_state->crtc != new_plane_state->crtc)
                        continue;

                if (old_other_state->crtc != new_other_state->crtc)
                        return true;

                /* TODO: Remove this once we can handle fast format changes. */
                if (old_other_state->fb && new_other_state->fb &&
                    old_other_state->fb->format != new_other_state->fb->format)
                        return true;
        }

        return false;
}

static int dm_update_plane_state(struct dc *dc,
                                 struct drm_atomic_state *state,
                                 struct drm_plane *plane,
                                 struct drm_plane_state *old_plane_state,
                                 struct drm_plane_state *new_plane_state,
                                 bool enable,
                                 bool *lock_and_validation_needed)
{

        struct dm_atomic_state *dm_state = NULL;
        struct drm_crtc *new_plane_crtc, *old_plane_crtc;
        struct drm_crtc_state *old_crtc_state, *new_crtc_state;
        struct dm_crtc_state *dm_new_crtc_state, *dm_old_crtc_state;
        struct dm_plane_state *dm_new_plane_state, *dm_old_plane_state;
        bool needs_reset;
        int ret = 0;


        new_plane_crtc = new_plane_state->crtc;
        old_plane_crtc = old_plane_state->crtc;
        dm_new_plane_state = to_dm_plane_state(new_plane_state);
        dm_old_plane_state = to_dm_plane_state(old_plane_state);

        /*TODO Implement atomic check for cursor plane */
        if (plane->type == DRM_PLANE_TYPE_CURSOR)
                return 0;

        needs_reset = should_reset_plane(state, plane, old_plane_state,
                                         new_plane_state);

        /* Remove any changed/removed planes */
        if (!enable) {
                if (!needs_reset)
                        return 0;

                if (!old_plane_crtc)
                        return 0;

                old_crtc_state = drm_atomic_get_old_crtc_state(
                                state, old_plane_crtc);
                dm_old_crtc_state = to_dm_crtc_state(old_crtc_state);

                if (!dm_old_crtc_state->stream)
                        return 0;

                DRM_DEBUG_ATOMIC("Disabling DRM plane: %d on DRM crtc %d\n",
                                plane->base.id, old_plane_crtc->base.id);

                ret = dm_atomic_get_state(state, &dm_state);
                if (ret)
                        return ret;

                if (!dc_remove_plane_from_context(
                                dc,
                                dm_old_crtc_state->stream,
                                dm_old_plane_state->dc_state,
                                dm_state->context)) {

                        ret = EINVAL;
                        return ret;
                }


                dc_plane_state_release(dm_old_plane_state->dc_state);
                dm_new_plane_state->dc_state = NULL;

                *lock_and_validation_needed = true;

        } else { /* Add new planes */
                struct dc_plane_state *dc_new_plane_state;

                if (drm_atomic_plane_disabling(plane->state, new_plane_state))
                        return 0;

                if (!new_plane_crtc)
                        return 0;

                new_crtc_state = drm_atomic_get_new_crtc_state(state, new_plane_crtc);
                dm_new_crtc_state = to_dm_crtc_state(new_crtc_state);

                if (!dm_new_crtc_state->stream)
                        return 0;

                if (!needs_reset)
                        return 0;

                WARN_ON(dm_new_plane_state->dc_state);

                dc_new_plane_state = dc_create_plane_state(dc);
                if (!dc_new_plane_state)
                        return -ENOMEM;

                DRM_DEBUG_DRIVER("Enabling DRM plane: %d on DRM crtc %d\n",
                                plane->base.id, new_plane_crtc->base.id);

                ret = fill_dc_plane_attributes(
                        new_plane_crtc->dev->dev_private,
                        dc_new_plane_state,
                        new_plane_state,
                        new_crtc_state);
                if (ret) {
                        dc_plane_state_release(dc_new_plane_state);
                        return ret;
                }

                ret = dm_atomic_get_state(state, &dm_state);
                if (ret) {
                        dc_plane_state_release(dc_new_plane_state);
                        return ret;
                }

                /*
                 * Any atomic check errors that occur after this will
                 * not need a release. The plane state will be attached
                 * to the stream, and therefore part of the atomic
                 * state. It'll be released when the atomic state is
                 * cleaned.
                 */
                if (!dc_add_plane_to_context(
                                dc,
                                dm_new_crtc_state->stream,
                                dc_new_plane_state,
                                dm_state->context)) {

                        dc_plane_state_release(dc_new_plane_state);
                        return -EINVAL;
                }

                dm_new_plane_state->dc_state = dc_new_plane_state;

                /* Tell DC to do a full surface update every time there
                 * is a plane change. Inefficient, but works for now.
                 */
                dm_new_plane_state->dc_state->update_flags.bits.full_update = 1;

                *lock_and_validation_needed = true;
        }


        return ret;
}

static int
dm_determine_update_type_for_commit(struct amdgpu_display_manager *dm,
                                    struct drm_atomic_state *state,
                                    enum surface_update_type *out_type)
{
        struct dc *dc = dm->dc;
        struct dm_atomic_state *dm_state = NULL, *old_dm_state = NULL;
        int i, j, num_plane, ret = 0;
        struct drm_plane_state *old_plane_state, *new_plane_state;
        struct dm_plane_state *new_dm_plane_state, *old_dm_plane_state;
        struct drm_crtc *new_plane_crtc;
        struct drm_plane *plane;

        struct drm_crtc *crtc;
        struct drm_crtc_state *new_crtc_state, *old_crtc_state;
        struct dm_crtc_state *new_dm_crtc_state, *old_dm_crtc_state;
        struct dc_stream_status *status = NULL;
        enum surface_update_type update_type = UPDATE_TYPE_FAST;
        struct surface_info_bundle {
                struct dc_surface_update surface_updates[MAX_SURFACES];
                struct dc_plane_info plane_infos[MAX_SURFACES];
                struct dc_scaling_info scaling_infos[MAX_SURFACES];
                struct dc_flip_addrs flip_addrs[MAX_SURFACES];
                struct dc_stream_update stream_update;
        } *bundle;

        bundle = kzalloc(sizeof(*bundle), GFP_KERNEL);

        if (!bundle) {
                DRM_ERROR("Failed to allocate update bundle\n");
                /* Set type to FULL to avoid crashing in DC*/
                update_type = UPDATE_TYPE_FULL;
                goto cleanup;
        }

        for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) {

                memset(bundle, 0, sizeof(struct surface_info_bundle));

                new_dm_crtc_state = to_dm_crtc_state(new_crtc_state);
                old_dm_crtc_state = to_dm_crtc_state(old_crtc_state);
                num_plane = 0;

                if (new_dm_crtc_state->stream != old_dm_crtc_state->stream) {
                        update_type = UPDATE_TYPE_FULL;
                        goto cleanup;
                }

                if (!new_dm_crtc_state->stream)
                        continue;

                for_each_oldnew_plane_in_state(state, plane, old_plane_state, new_plane_state, j) {
                        const struct amdgpu_framebuffer *amdgpu_fb =
                                to_amdgpu_framebuffer(new_plane_state->fb);
                        struct dc_plane_info *plane_info = &bundle->plane_infos[num_plane];
                        struct dc_flip_addrs *flip_addr = &bundle->flip_addrs[num_plane];
                        struct dc_scaling_info *scaling_info = &bundle->scaling_infos[num_plane];
                        uint64_t tiling_flags;

                        new_plane_crtc = new_plane_state->crtc;
                        new_dm_plane_state = to_dm_plane_state(new_plane_state);
                        old_dm_plane_state = to_dm_plane_state(old_plane_state);

                        if (plane->type == DRM_PLANE_TYPE_CURSOR)
                                continue;

                        if (new_dm_plane_state->dc_state != old_dm_plane_state->dc_state) {
                                update_type = UPDATE_TYPE_FULL;
                                goto cleanup;
                        }

                        if (crtc != new_plane_crtc)
                                continue;

                        bundle->surface_updates[num_plane].surface =
                                        new_dm_plane_state->dc_state;

                        if (new_crtc_state->mode_changed) {
                                bundle->stream_update.dst = new_dm_crtc_state->stream->dst;
                                bundle->stream_update.src = new_dm_crtc_state->stream->src;
                        }

                        if (new_crtc_state->color_mgmt_changed) {
                                bundle->surface_updates[num_plane].gamma =
                                                new_dm_plane_state->dc_state->gamma_correction;
                                bundle->surface_updates[num_plane].in_transfer_func =
                                                new_dm_plane_state->dc_state->in_transfer_func;
                                bundle->stream_update.gamut_remap =
                                                &new_dm_crtc_state->stream->gamut_remap_matrix;
                                bundle->stream_update.output_csc_transform =
                                                &new_dm_crtc_state->stream->csc_color_matrix;
                                bundle->stream_update.out_transfer_func =
                                                new_dm_crtc_state->stream->out_transfer_func;
                        }

                        ret = fill_dc_scaling_info(new_plane_state,
                                                   scaling_info);
                        if (ret)
                                goto cleanup;

                        bundle->surface_updates[num_plane].scaling_info = scaling_info;

                        if (amdgpu_fb) {
                                ret = get_fb_info(amdgpu_fb, &tiling_flags);
                                if (ret)
                                        goto cleanup;

                                ret = fill_dc_plane_info_and_addr(
                                        dm->adev, new_plane_state, tiling_flags,
                                        plane_info,
                                        &flip_addr->address);
                                if (ret)
                                        goto cleanup;

                                bundle->surface_updates[num_plane].plane_info = plane_info;
                                bundle->surface_updates[num_plane].flip_addr = flip_addr;
                        }

                        num_plane++;
                }

                if (num_plane == 0)
                        continue;

                ret = dm_atomic_get_state(state, &dm_state);
                if (ret)
                        goto cleanup;

                old_dm_state = dm_atomic_get_old_state(state);
                if (!old_dm_state) {
                        ret = -EINVAL;
                        goto cleanup;
                }

                status = dc_stream_get_status_from_state(old_dm_state->context,
                                                         new_dm_crtc_state->stream);
                bundle->stream_update.stream = new_dm_crtc_state->stream;
                /*
                 * TODO: DC modifies the surface during this call so we need
                 * to lock here - find a way to do this without locking.
                 */
                mutex_lock(&dm->dc_lock);
                update_type = dc_check_update_surfaces_for_stream(
                                dc,     bundle->surface_updates, num_plane,
                                &bundle->stream_update, status);
                mutex_unlock(&dm->dc_lock);

                if (update_type > UPDATE_TYPE_MED) {
                        update_type = UPDATE_TYPE_FULL;
                        goto cleanup;
                }
        }

cleanup:
        kfree(bundle);

        *out_type = update_type;
        return ret;
}

static int add_affected_mst_dsc_crtcs(struct drm_atomic_state *state, struct drm_crtc *crtc)
{
        struct drm_connector *connector;
        struct drm_connector_state *conn_state;
        struct amdgpu_dm_connector *aconnector = NULL;
        int i;
        for_each_new_connector_in_state(state, connector, conn_state, i) {
                if (conn_state->crtc != crtc)
                        continue;

                aconnector = to_amdgpu_dm_connector(connector);
                if (!aconnector->port || !aconnector->mst_port)
                        aconnector = NULL;
                else
                        break;
        }

        if (!aconnector)
                return 0;

        return drm_dp_mst_add_affected_dsc_crtcs(state, &aconnector->mst_port->mst_mgr);
}

/**
 * amdgpu_dm_atomic_check() - Atomic check implementation for AMDgpu DM.
 * @dev: The DRM device
 * @state: The atomic state to commit
 *
 * Validate that the given atomic state is programmable by DC into hardware.
 * This involves constructing a &struct dc_state reflecting the new hardware
 * state we wish to commit, then querying DC to see if it is programmable. It's
 * important not to modify the existing DC state. Otherwise, atomic_check
 * may unexpectedly commit hardware changes.
 *
 * When validating the DC state, it's important that the right locks are
 * acquired. For full updates case which removes/adds/updates streams on one
 * CRTC while flipping on another CRTC, acquiring global lock will guarantee
 * that any such full update commit will wait for completion of any outstanding
 * flip using DRMs synchronization events. See
 * dm_determine_update_type_for_commit()
 *
 * Note that DM adds the affected connectors for all CRTCs in state, when that
 * might not seem necessary. This is because DC stream creation requires the
 * DC sink, which is tied to the DRM connector state. Cleaning this up should
 * be possible but non-trivial - a possible TODO item.
 *
 * Return: -Error code if validation failed.
 */
static int amdgpu_dm_atomic_check(struct drm_device *dev,
                                  struct drm_atomic_state *state)
{
        struct amdgpu_device *adev = dev->dev_private;
        struct dm_atomic_state *dm_state = NULL;
        struct dc *dc = adev->dm.dc;
        struct drm_connector *connector;
        struct drm_connector_state *old_con_state, *new_con_state;
        struct drm_crtc *crtc;
        struct drm_crtc_state *old_crtc_state, *new_crtc_state;
        struct drm_plane *plane;
        struct drm_plane_state *old_plane_state, *new_plane_state;
        enum surface_update_type update_type = UPDATE_TYPE_FAST;
        enum surface_update_type overall_update_type = UPDATE_TYPE_FAST;

        int ret, i;

        /*
         * This bool will be set for true for any modeset/reset
         * or plane update which implies non fast surface update.
         */
        bool lock_and_validation_needed = false;

        ret = drm_atomic_helper_check_modeset(dev, state);
        if (ret)
                goto fail;

        if (adev->asic_type >= CHIP_NAVI10) {
                for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) {
                        if (drm_atomic_crtc_needs_modeset(new_crtc_state)) {
                                ret = add_affected_mst_dsc_crtcs(state, crtc);
                                if (ret)
                                        goto fail;
                        }
                }
        }

        for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) {
                if (!drm_atomic_crtc_needs_modeset(new_crtc_state) &&
                    !new_crtc_state->color_mgmt_changed &&
                    old_crtc_state->vrr_enabled == new_crtc_state->vrr_enabled)
                        continue;

                if (!new_crtc_state->enable)
                        continue;

                ret = drm_atomic_add_affected_connectors(state, crtc);
                if (ret)
                        return ret;

                ret = drm_atomic_add_affected_planes(state, crtc);
                if (ret)
                        goto fail;
        }

        /*
         * Add all primary and overlay planes on the CRTC to the state
         * whenever a plane is enabled to maintain correct z-ordering
         * and to enable fast surface updates.
         */
        drm_for_each_crtc(crtc, dev) {
                bool modified = false;

                for_each_oldnew_plane_in_state(state, plane, old_plane_state, new_plane_state, i) {
                        if (plane->type == DRM_PLANE_TYPE_CURSOR)
                                continue;

                        if (new_plane_state->crtc == crtc ||
                            old_plane_state->crtc == crtc) {
                                modified = true;
                                break;
                        }
                }

                if (!modified)
                        continue;

                drm_for_each_plane_mask(plane, state->dev, crtc->state->plane_mask) {
                        if (plane->type == DRM_PLANE_TYPE_CURSOR)
                                continue;

                        new_plane_state =
                                drm_atomic_get_plane_state(state, plane);

                        if (IS_ERR(new_plane_state)) {
                                ret = PTR_ERR(new_plane_state);
                                goto fail;
                        }
                }
        }

        /* Remove exiting planes if they are modified */
        for_each_oldnew_plane_in_state_reverse(state, plane, old_plane_state, new_plane_state, i) {
                ret = dm_update_plane_state(dc, state, plane,
                                            old_plane_state,
                                            new_plane_state,
                                            false,
                                            &lock_and_validation_needed);
                if (ret)
                        goto fail;
        }

        /* Disable all crtcs which require disable */
        for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) {
                ret = dm_update_crtc_state(&adev->dm, state, crtc,
                                           old_crtc_state,
                                           new_crtc_state,
                                           false,
                                           &lock_and_validation_needed);
                if (ret)
                        goto fail;
        }

        /* Enable all crtcs which require enable */
        for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) {
                ret = dm_update_crtc_state(&adev->dm, state, crtc,
                                           old_crtc_state,
                                           new_crtc_state,
                                           true,
                                           &lock_and_validation_needed);
                if (ret)
                        goto fail;
        }

        /* Add new/modified planes */
        for_each_oldnew_plane_in_state_reverse(state, plane, old_plane_state, new_plane_state, i) {
                ret = dm_update_plane_state(dc, state, plane,
                                            old_plane_state,
                                            new_plane_state,
                                            true,
                                            &lock_and_validation_needed);
                if (ret)
                        goto fail;
        }

        /* Run this here since we want to validate the streams we created */
        ret = drm_atomic_helper_check_planes(dev, state);
        if (ret)
                goto fail;

        if (state->legacy_cursor_update) {
                /*
                 * This is a fast cursor update coming from the plane update
                 * helper, check if it can be done asynchronously for better
                 * performance.
                 */
                state->async_update =
                        !drm_atomic_helper_async_check(dev, state);

                /*
                 * Skip the remaining global validation if this is an async
                 * update. Cursor updates can be done without affecting
                 * state or bandwidth calcs and this avoids the performance
                 * penalty of locking the private state object and
                 * allocating a new dc_state.
                 */
                if (state->async_update)
                        return 0;
        }

        /* Check scaling and underscan changes*/
        /* TODO Removed scaling changes validation due to inability to commit
         * new stream into context w\o causing full reset. Need to
         * decide how to handle.
         */
        for_each_oldnew_connector_in_state(state, connector, old_con_state, new_con_state, i) {
                struct dm_connector_state *dm_old_con_state = to_dm_connector_state(old_con_state);
                struct dm_connector_state *dm_new_con_state = to_dm_connector_state(new_con_state);
                struct amdgpu_crtc *acrtc = to_amdgpu_crtc(dm_new_con_state->base.crtc);

                /* Skip any modesets/resets */
                if (!acrtc || drm_atomic_crtc_needs_modeset(
                                drm_atomic_get_new_crtc_state(state, &acrtc->base)))
                        continue;

                /* Skip any thing not scale or underscan changes */
                if (!is_scaling_state_different(dm_new_con_state, dm_old_con_state))
                        continue;

                overall_update_type = UPDATE_TYPE_FULL;
                lock_and_validation_needed = true;
        }

        ret = dm_determine_update_type_for_commit(&adev->dm, state, &update_type);
        if (ret)
                goto fail;

        if (overall_update_type < update_type)
                overall_update_type = update_type;

        /*
         * lock_and_validation_needed was an old way to determine if we need to set
         * the global lock. Leaving it in to check if we broke any corner cases
         * lock_and_validation_needed true = UPDATE_TYPE_FULL or UPDATE_TYPE_MED
         * lock_and_validation_needed false = UPDATE_TYPE_FAST
         */
        if (lock_and_validation_needed && overall_update_type <= UPDATE_TYPE_FAST)
                WARN(1, "Global lock should be Set, overall_update_type should be UPDATE_TYPE_MED or UPDATE_TYPE_FULL");

        if (overall_update_type > UPDATE_TYPE_FAST) {
                ret = dm_atomic_get_state(state, &dm_state);
                if (ret)
                        goto fail;

                ret = do_aquire_global_lock(dev, state);
                if (ret)
                        goto fail;

#if defined(CONFIG_DRM_AMD_DC_DCN)
                if (!compute_mst_dsc_configs_for_state(state, dm_state->context))
                        goto fail;

                ret = dm_update_mst_vcpi_slots_for_dsc(state, dm_state->context);
                if (ret)
                        goto fail;
#endif

                /*
                 * Perform validation of MST topology in the state:
                 * We need to perform MST atomic check before calling
                 * dc_validate_global_state(), or there is a chance
                 * to get stuck in an infinite loop and hang eventually.
                 */
                ret = drm_dp_mst_atomic_check(state);
                if (ret)
                        goto fail;

                if (dc_validate_global_state(dc, dm_state->context, false) != DC_OK) {
                        ret = -EINVAL;
                        goto fail;
                }
        } else {
                /*
                 * The commit is a fast update. Fast updates shouldn't change
                 * the DC context, affect global validation, and can have their
                 * commit work done in parallel with other commits not touching
                 * the same resource. If we have a new DC context as part of
                 * the DM atomic state from validation we need to free it and
                 * retain the existing one instead.
                 */
                struct dm_atomic_state *new_dm_state, *old_dm_state;

                new_dm_state = dm_atomic_get_new_state(state);
                old_dm_state = dm_atomic_get_old_state(state);

                if (new_dm_state && old_dm_state) {
                        if (new_dm_state->context)
                                dc_release_state(new_dm_state->context);

                        new_dm_state->context = old_dm_state->context;

                        if (old_dm_state->context)
                                dc_retain_state(old_dm_state->context);
                }
        }

        /* Store the overall update type for use later in atomic check. */
        for_each_new_crtc_in_state (state, crtc, new_crtc_state, i) {
                struct dm_crtc_state *dm_new_crtc_state =
                        to_dm_crtc_state(new_crtc_state);

                dm_new_crtc_state->update_type = (int)overall_update_type;
        }

        /* Must be success */
        WARN_ON(ret);
        return ret;

fail:
        if (ret == -EDEADLK)
                DRM_DEBUG_DRIVER("Atomic check stopped to avoid deadlock.\n");
        else if (ret == -EINTR || ret == -EAGAIN || ret == -ERESTARTSYS)
                DRM_DEBUG_DRIVER("Atomic check stopped due to signal.\n");
        else
                DRM_DEBUG_DRIVER("Atomic check failed with err: %d \n", ret);

        return ret;
}

static bool is_dp_capable_without_timing_msa(struct dc *dc,
                                             struct amdgpu_dm_connector *amdgpu_dm_connector)
{
        uint8_t dpcd_data;
        bool capable = false;

        if (amdgpu_dm_connector->dc_link &&
                dm_helpers_dp_read_dpcd(
                                NULL,
                                amdgpu_dm_connector->dc_link,
                                DP_DOWN_STREAM_PORT_COUNT,
                                &dpcd_data,
                                sizeof(dpcd_data))) {
                capable = (dpcd_data & DP_MSA_TIMING_PAR_IGNORED) ? true:false;
        }

        return capable;
}
void amdgpu_dm_update_freesync_caps(struct drm_connector *connector,
                                        struct edid *edid)
{
        int i;
        bool edid_check_required;
        struct detailed_timing *timing;
        struct detailed_non_pixel *data;
        struct detailed_data_monitor_range *range;
        struct amdgpu_dm_connector *amdgpu_dm_connector =
                        to_amdgpu_dm_connector(connector);
        struct dm_connector_state *dm_con_state = NULL;

        struct drm_device *dev = connector->dev;
        struct amdgpu_device *adev = dev->dev_private;
        bool freesync_capable = false;

        if (!connector->state) {
                DRM_ERROR("%s - Connector has no state", __func__);
                goto update;
        }

        if (!edid) {
                dm_con_state = to_dm_connector_state(connector->state);

                amdgpu_dm_connector->min_vfreq = 0;
                amdgpu_dm_connector->max_vfreq = 0;
                amdgpu_dm_connector->pixel_clock_mhz = 0;

                goto update;
        }

        dm_con_state = to_dm_connector_state(connector->state);

        edid_check_required = false;
        if (!amdgpu_dm_connector->dc_sink) {
                DRM_ERROR("dc_sink NULL, could not add free_sync module.\n");
                goto update;
        }
        if (!adev->dm.freesync_module)
                goto update;
        /*
         * if edid non zero restrict freesync only for dp and edp
         */
        if (edid) {
                if (amdgpu_dm_connector->dc_sink->sink_signal == SIGNAL_TYPE_DISPLAY_PORT
                        || amdgpu_dm_connector->dc_sink->sink_signal == SIGNAL_TYPE_EDP) {
                        edid_check_required = is_dp_capable_without_timing_msa(
                                                adev->dm.dc,
                                                amdgpu_dm_connector);
                }
        }
        if (edid_check_required == true && (edid->version > 1 ||
           (edid->version == 1 && edid->revision > 1))) {
                for (i = 0; i < 4; i++) {

                        timing  = &edid->detailed_timings[i];
                        data    = &timing->data.other_data;
                        range   = &data->data.range;
                        /*
                         * Check if monitor has continuous frequency mode
                         */
                        if (data->type != EDID_DETAIL_MONITOR_RANGE)
                                continue;
                        /*
                         * Check for flag range limits only. If flag == 1 then
                         * no additional timing information provided.
                         * Default GTF, GTF Secondary curve and CVT are not
                         * supported
                         */
                        if (range->flags != 1)
                                continue;

                        amdgpu_dm_connector->min_vfreq = range->min_vfreq;
                        amdgpu_dm_connector->max_vfreq = range->max_vfreq;
                        amdgpu_dm_connector->pixel_clock_mhz =
                                range->pixel_clock_mhz * 10;
                        break;
                }

                if (amdgpu_dm_connector->max_vfreq -
                    amdgpu_dm_connector->min_vfreq > 10) {

                        freesync_capable = true;
                }
        }

update:
        if (dm_con_state)
                dm_con_state->freesync_capable = freesync_capable;

        if (connector->vrr_capable_property)
                drm_connector_set_vrr_capable_property(connector,
                                                       freesync_capable);
}

static void amdgpu_dm_set_psr_caps(struct dc_link *link)
{
        uint8_t dpcd_data[EDP_PSR_RECEIVER_CAP_SIZE];

        if (!(link->connector_signal & SIGNAL_TYPE_EDP))
                return;
        if (link->type == dc_connection_none)
                return;
        if (dm_helpers_dp_read_dpcd(NULL, link, DP_PSR_SUPPORT,
                                        dpcd_data, sizeof(dpcd_data))) {
                link->psr_feature_enabled = dpcd_data[0] ? true:false;
                DRM_INFO("PSR support:%d\n", link->psr_feature_enabled);
        }
}

/*
 * amdgpu_dm_link_setup_psr() - configure psr link
 * @stream: stream state
 *
 * Return: true if success
 */
static bool amdgpu_dm_link_setup_psr(struct dc_stream_state *stream)
{
        struct dc_link *link = NULL;
        struct psr_config psr_config = {0};
        struct psr_context psr_context = {0};
        struct dc *dc = NULL;
        bool ret = false;

        if (stream == NULL)
                return false;

        link = stream->link;
        dc = link->ctx->dc;

        psr_config.psr_version = dc->res_pool->dmcu->dmcu_version.psr_version;

        if (psr_config.psr_version > 0) {
                psr_config.psr_exit_link_training_required = 0x1;
                psr_config.psr_frame_capture_indication_req = 0;
                psr_config.psr_rfb_setup_time = 0x37;
                psr_config.psr_sdp_transmit_line_num_deadline = 0x20;
                psr_config.allow_smu_optimizations = 0x0;

                ret = dc_link_setup_psr(link, stream, &psr_config, &psr_context);

        }
        DRM_DEBUG_DRIVER("PSR link: %d\n",      link->psr_feature_enabled);

        return ret;
}

/*
 * amdgpu_dm_psr_enable() - enable psr f/w
 * @stream: stream state
 *
 * Return: true if success
 */
bool amdgpu_dm_psr_enable(struct dc_stream_state *stream)
{
        struct dc_link *link = stream->link;
        unsigned int vsync_rate_hz = 0;
        struct dc_static_screen_params params = {0};
        /* Calculate number of static frames before generating interrupt to
         * enter PSR.
         */
        // Init fail safe of 2 frames static
        unsigned int num_frames_static = 2;

        DRM_DEBUG_DRIVER("Enabling psr...\n");

        vsync_rate_hz = div64_u64(div64_u64((
                        stream->timing.pix_clk_100hz * 100),
                        stream->timing.v_total),
                        stream->timing.h_total);

        /* Round up
         * Calculate number of frames such that at least 30 ms of time has
         * passed.
         */
        if (vsync_rate_hz != 0) {
                unsigned int frame_time_microsec = 1000000 / vsync_rate_hz;
                num_frames_static = (30000 / frame_time_microsec) + 1;
        }

        params.triggers.cursor_update = true;
        params.triggers.overlay_update = true;
        params.triggers.surface_update = true;
        params.num_frames = num_frames_static;

        dc_stream_set_static_screen_params(link->ctx->dc,
                                           &stream, 1,
                                           &params);

        return dc_link_set_psr_allow_active(link, true, false);
}

/*
 * amdgpu_dm_psr_disable() - disable psr f/w
 * @stream:  stream state
 *
 * Return: true if success
 */
static bool amdgpu_dm_psr_disable(struct dc_stream_state *stream)
{

        DRM_DEBUG_DRIVER("Disabling psr...\n");

        return dc_link_set_psr_allow_active(stream->link, false, true);
}