From f3b603de2ff41eb915d75163f7212bbf177950d1 Mon Sep 17 00:00:00 2001 From: =?utf8?q?Ville=20Syrj=C3=A4l=C3=A4?= Date: Wed, 9 Feb 2022 13:35:23 +0200 Subject: [PATCH] drm/i915: Move the IPS code to its own file MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit IPS is a pretty well isolated feature. Move the relevant code to a separate file from polluting intel_display.c. I stuck to the hsw_ips name since that's what the function were already using, and also to avoid confusion with the ILK "Intelligen Power Sharing"/intel_ips GPU turbo stuff. And let's also do the s/dev_priv/i915/ rename while touching most of the code. Signed-off-by: Ville Syrjälä Link: https://patchwork.freedesktop.org/patch/msgid/20220209113526.7595-4-ville.syrjala@linux.intel.com Reviewed-by: Jani Nikula --- drivers/gpu/drm/i915/Makefile | 1 + drivers/gpu/drm/i915/display/hsw_ips.c | 251 +++++++++++++++++++++++++++ drivers/gpu/drm/i915/display/hsw_ips.h | 25 +++ drivers/gpu/drm/i915/display/intel_cdclk.c | 1 + drivers/gpu/drm/i915/display/intel_display.c | 239 +------------------------ drivers/gpu/drm/i915/display/intel_display.h | 1 - 6 files changed, 279 insertions(+), 239 deletions(-) create mode 100644 drivers/gpu/drm/i915/display/hsw_ips.c create mode 100644 drivers/gpu/drm/i915/display/hsw_ips.h diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile index 6836b020a5be..16cab8db012a 100644 --- a/drivers/gpu/drm/i915/Makefile +++ b/drivers/gpu/drm/i915/Makefile @@ -198,6 +198,7 @@ i915-y += gt/uc/intel_uc.o \ # modesetting core code i915-y += \ + display/hsw_ips.o \ display/intel_atomic.o \ display/intel_atomic_plane.o \ display/intel_audio.o \ diff --git a/drivers/gpu/drm/i915/display/hsw_ips.c b/drivers/gpu/drm/i915/display/hsw_ips.c new file mode 100644 index 000000000000..fb34ef615025 --- /dev/null +++ b/drivers/gpu/drm/i915/display/hsw_ips.c @@ -0,0 +1,251 @@ +// SPDX-License-Identifier: MIT +/* + * Copyright © 2022 Intel Corporation + */ + +#include "hsw_ips.h" +#include "i915_drv.h" +#include "i915_reg.h" +#include "intel_de.h" +#include "intel_display_types.h" +#include "intel_pcode.h" + +static void hsw_ips_enable(const struct intel_crtc_state *crtc_state) +{ + struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc); + struct drm_i915_private *i915 = to_i915(crtc->base.dev); + + if (!crtc_state->ips_enabled) + return; + + /* + * We can only enable IPS after we enable a plane and wait for a vblank + * This function is called from post_plane_update, which is run after + * a vblank wait. + */ + drm_WARN_ON(&i915->drm, + !(crtc_state->active_planes & ~BIT(PLANE_CURSOR))); + + if (IS_BROADWELL(i915)) { + drm_WARN_ON(&i915->drm, + snb_pcode_write(i915, DISPLAY_IPS_CONTROL, + IPS_ENABLE | IPS_PCODE_CONTROL)); + /* + * Quoting Art Runyan: "its not safe to expect any particular + * value in IPS_CTL bit 31 after enabling IPS through the + * mailbox." Moreover, the mailbox may return a bogus state, + * so we need to just enable it and continue on. + */ + } else { + intel_de_write(i915, IPS_CTL, IPS_ENABLE); + /* + * The bit only becomes 1 in the next vblank, so this wait here + * is essentially intel_wait_for_vblank. If we don't have this + * and don't wait for vblanks until the end of crtc_enable, then + * the HW state readout code will complain that the expected + * IPS_CTL value is not the one we read. + */ + if (intel_de_wait_for_set(i915, IPS_CTL, IPS_ENABLE, 50)) + drm_err(&i915->drm, + "Timed out waiting for IPS enable\n"); + } +} + +bool hsw_ips_disable(const struct intel_crtc_state *crtc_state) +{ + struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc); + struct drm_i915_private *i915 = to_i915(crtc->base.dev); + bool need_vblank_wait = false; + + if (!crtc_state->ips_enabled) + return need_vblank_wait; + + if (IS_BROADWELL(i915)) { + drm_WARN_ON(&i915->drm, + snb_pcode_write(i915, DISPLAY_IPS_CONTROL, 0)); + /* + * Wait for PCODE to finish disabling IPS. The BSpec specified + * 42ms timeout value leads to occasional timeouts so use 100ms + * instead. + */ + if (intel_de_wait_for_clear(i915, IPS_CTL, IPS_ENABLE, 100)) + drm_err(&i915->drm, + "Timed out waiting for IPS disable\n"); + } else { + intel_de_write(i915, IPS_CTL, 0); + intel_de_posting_read(i915, IPS_CTL); + } + + /* We need to wait for a vblank before we can disable the plane. */ + need_vblank_wait = true; + + return need_vblank_wait; +} + +static bool hsw_ips_need_disable(struct intel_atomic_state *state, + struct intel_crtc *crtc) +{ + struct drm_i915_private *i915 = to_i915(state->base.dev); + const struct intel_crtc_state *old_crtc_state = + intel_atomic_get_old_crtc_state(state, crtc); + const struct intel_crtc_state *new_crtc_state = + intel_atomic_get_new_crtc_state(state, crtc); + + if (!old_crtc_state->ips_enabled) + return false; + + if (intel_crtc_needs_modeset(new_crtc_state)) + return true; + + /* + * Workaround : Do not read or write the pipe palette/gamma data while + * GAMMA_MODE is configured for split gamma and IPS_CTL has IPS enabled. + * + * Disable IPS before we program the LUT. + */ + if (IS_HASWELL(i915) && + (new_crtc_state->uapi.color_mgmt_changed || + new_crtc_state->update_pipe) && + new_crtc_state->gamma_mode == GAMMA_MODE_MODE_SPLIT) + return true; + + return !new_crtc_state->ips_enabled; +} + +bool hsw_ips_pre_update(struct intel_atomic_state *state, + struct intel_crtc *crtc) +{ + const struct intel_crtc_state *old_crtc_state = + intel_atomic_get_old_crtc_state(state, crtc); + + if (!hsw_ips_need_disable(state, crtc)) + return false; + + return hsw_ips_disable(old_crtc_state); +} + +static bool hsw_ips_need_enable(struct intel_atomic_state *state, + struct intel_crtc *crtc) +{ + struct drm_i915_private *i915 = to_i915(state->base.dev); + const struct intel_crtc_state *old_crtc_state = + intel_atomic_get_old_crtc_state(state, crtc); + const struct intel_crtc_state *new_crtc_state = + intel_atomic_get_new_crtc_state(state, crtc); + + if (!new_crtc_state->ips_enabled) + return false; + + if (intel_crtc_needs_modeset(new_crtc_state)) + return true; + + /* + * Workaround : Do not read or write the pipe palette/gamma data while + * GAMMA_MODE is configured for split gamma and IPS_CTL has IPS enabled. + * + * Re-enable IPS after the LUT has been programmed. + */ + if (IS_HASWELL(i915) && + (new_crtc_state->uapi.color_mgmt_changed || + new_crtc_state->update_pipe) && + new_crtc_state->gamma_mode == GAMMA_MODE_MODE_SPLIT) + return true; + + /* + * We can't read out IPS on broadwell, assume the worst and + * forcibly enable IPS on the first fastset. + */ + if (new_crtc_state->update_pipe && old_crtc_state->inherited) + return true; + + return !old_crtc_state->ips_enabled; +} + +void hsw_ips_post_update(struct intel_atomic_state *state, + struct intel_crtc *crtc) +{ + const struct intel_crtc_state *new_crtc_state = + intel_atomic_get_new_crtc_state(state, crtc); + + if (!hsw_ips_need_enable(state, crtc)) + return; + + hsw_ips_enable(new_crtc_state); +} + +/* IPS only exists on ULT machines and is tied to pipe A. */ +bool hsw_crtc_supports_ips(struct intel_crtc *crtc) +{ + return HAS_IPS(to_i915(crtc->base.dev)) && crtc->pipe == PIPE_A; +} + +bool hsw_crtc_state_ips_capable(const struct intel_crtc_state *crtc_state) +{ + struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc); + struct drm_i915_private *i915 = to_i915(crtc->base.dev); + + /* IPS only exists on ULT machines and is tied to pipe A. */ + if (!hsw_crtc_supports_ips(crtc)) + return false; + + if (!i915->params.enable_ips) + return false; + + if (crtc_state->pipe_bpp > 24) + return false; + + /* + * We compare against max which means we must take + * the increased cdclk requirement into account when + * calculating the new cdclk. + * + * Should measure whether using a lower cdclk w/o IPS + */ + if (IS_BROADWELL(i915) && + crtc_state->pixel_rate > i915->max_cdclk_freq * 95 / 100) + return false; + + return true; +} + +int hsw_ips_compute_config(struct intel_atomic_state *state, + struct intel_crtc *crtc) +{ + struct drm_i915_private *i915 = to_i915(state->base.dev); + struct intel_crtc_state *crtc_state = + intel_atomic_get_new_crtc_state(state, crtc); + + crtc_state->ips_enabled = false; + + if (!hsw_crtc_state_ips_capable(crtc_state)) + return 0; + + /* + * When IPS gets enabled, the pipe CRC changes. Since IPS gets + * enabled and disabled dynamically based on package C states, + * user space can't make reliable use of the CRCs, so let's just + * completely disable it. + */ + if (crtc_state->crc_enabled) + return 0; + + /* IPS should be fine as long as at least one plane is enabled. */ + if (!(crtc_state->active_planes & ~BIT(PLANE_CURSOR))) + return 0; + + if (IS_BROADWELL(i915)) { + const struct intel_cdclk_state *cdclk_state; + + cdclk_state = intel_atomic_get_cdclk_state(state); + if (IS_ERR(cdclk_state)) + return PTR_ERR(cdclk_state); + + /* pixel rate mustn't exceed 95% of cdclk with IPS on BDW */ + if (crtc_state->pixel_rate > cdclk_state->logical.cdclk * 95 / 100) + return 0; + } + + crtc_state->ips_enabled = true; + + return 0; +} diff --git a/drivers/gpu/drm/i915/display/hsw_ips.h b/drivers/gpu/drm/i915/display/hsw_ips.h new file mode 100644 index 000000000000..d63bdef5100a --- /dev/null +++ b/drivers/gpu/drm/i915/display/hsw_ips.h @@ -0,0 +1,25 @@ +/* SPDX-License-Identifier: MIT */ +/* + * Copyright © 2022 Intel Corporation + */ + +#ifndef __HSW_IPS_H__ +#define __HSW_IPS_H__ + +#include + +struct intel_atomic_state; +struct intel_crtc; +struct intel_crtc_state; + +bool hsw_ips_disable(const struct intel_crtc_state *crtc_state); +bool hsw_ips_pre_update(struct intel_atomic_state *state, + struct intel_crtc *crtc); +void hsw_ips_post_update(struct intel_atomic_state *state, + struct intel_crtc *crtc); +bool hsw_crtc_supports_ips(struct intel_crtc *crtc); +bool hsw_crtc_state_ips_capable(const struct intel_crtc_state *crtc_state); +int hsw_ips_compute_config(struct intel_atomic_state *state, + struct intel_crtc *crtc); + +#endif /* __HSW_IPS_H__ */ diff --git a/drivers/gpu/drm/i915/display/intel_cdclk.c b/drivers/gpu/drm/i915/display/intel_cdclk.c index 4b140a014ca8..118ef391b560 100644 --- a/drivers/gpu/drm/i915/display/intel_cdclk.c +++ b/drivers/gpu/drm/i915/display/intel_cdclk.c @@ -23,6 +23,7 @@ #include +#include "hsw_ips.h" #include "intel_atomic.h" #include "intel_atomic_plane.h" #include "intel_audio.h" diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c index 6b31789beac3..628636c677b9 100644 --- a/drivers/gpu/drm/i915/display/intel_display.c +++ b/drivers/gpu/drm/i915/display/intel_display.c @@ -74,6 +74,7 @@ #include "g4x_dp.h" #include "g4x_hdmi.h" +#include "hsw_ips.h" #include "i915_drv.h" #include "icl_dsi.h" #include "intel_acpi.h" @@ -125,7 +126,6 @@ static void bdw_set_pipemisc(const struct intel_crtc_state *crtc_state); static void ilk_pfit_enable(const struct intel_crtc_state *crtc_state); static void intel_modeset_setup_hw_state(struct drm_device *dev, struct drm_modeset_acquire_ctx *ctx); -static bool hsw_ips_disable(const struct intel_crtc_state *crtc_state); /** * intel_update_watermarks - update FIFO watermark values based on current modes @@ -1092,75 +1092,6 @@ static void ilk_pfit_enable(const struct intel_crtc_state *crtc_state) intel_de_write(dev_priv, PF_WIN_SZ(pipe), width << 16 | height); } -static void hsw_ips_enable(const struct intel_crtc_state *crtc_state) -{ - struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc); - struct drm_device *dev = crtc->base.dev; - struct drm_i915_private *dev_priv = to_i915(dev); - - if (!crtc_state->ips_enabled) - return; - - /* - * We can only enable IPS after we enable a plane and wait for a vblank - * This function is called from post_plane_update, which is run after - * a vblank wait. - */ - drm_WARN_ON(dev, !(crtc_state->active_planes & ~BIT(PLANE_CURSOR))); - - if (IS_BROADWELL(dev_priv)) { - drm_WARN_ON(dev, snb_pcode_write(dev_priv, DISPLAY_IPS_CONTROL, - IPS_ENABLE | IPS_PCODE_CONTROL)); - /* Quoting Art Runyan: "its not safe to expect any particular - * value in IPS_CTL bit 31 after enabling IPS through the - * mailbox." Moreover, the mailbox may return a bogus state, - * so we need to just enable it and continue on. - */ - } else { - intel_de_write(dev_priv, IPS_CTL, IPS_ENABLE); - /* The bit only becomes 1 in the next vblank, so this wait here - * is essentially intel_wait_for_vblank. If we don't have this - * and don't wait for vblanks until the end of crtc_enable, then - * the HW state readout code will complain that the expected - * IPS_CTL value is not the one we read. */ - if (intel_de_wait_for_set(dev_priv, IPS_CTL, IPS_ENABLE, 50)) - drm_err(&dev_priv->drm, - "Timed out waiting for IPS enable\n"); - } -} - -static bool hsw_ips_disable(const struct intel_crtc_state *crtc_state) -{ - struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc); - struct drm_device *dev = crtc->base.dev; - struct drm_i915_private *dev_priv = to_i915(dev); - bool need_vblank_wait = false; - - if (!crtc_state->ips_enabled) - return need_vblank_wait; - - if (IS_BROADWELL(dev_priv)) { - drm_WARN_ON(dev, - snb_pcode_write(dev_priv, DISPLAY_IPS_CONTROL, 0)); - /* - * Wait for PCODE to finish disabling IPS. The BSpec specified - * 42ms timeout value leads to occasional timeouts so use 100ms - * instead. - */ - if (intel_de_wait_for_clear(dev_priv, IPS_CTL, IPS_ENABLE, 100)) - drm_err(&dev_priv->drm, - "Timed out waiting for IPS disable\n"); - } else { - intel_de_write(dev_priv, IPS_CTL, 0); - intel_de_posting_read(dev_priv, IPS_CTL); - } - - /* We need to wait for a vblank before we can disable the plane. */ - need_vblank_wait = true; - - return need_vblank_wait; -} - static void intel_crtc_dpms_overlay_disable(struct intel_crtc *crtc) { if (crtc->overlay) @@ -1171,97 +1102,6 @@ static void intel_crtc_dpms_overlay_disable(struct intel_crtc *crtc) */ } -static bool hsw_ips_need_disable(struct intel_atomic_state *state, - struct intel_crtc *crtc) -{ - struct drm_i915_private *dev_priv = to_i915(state->base.dev); - const struct intel_crtc_state *old_crtc_state = - intel_atomic_get_old_crtc_state(state, crtc); - const struct intel_crtc_state *new_crtc_state = - intel_atomic_get_new_crtc_state(state, crtc); - - if (!old_crtc_state->ips_enabled) - return false; - - if (intel_crtc_needs_modeset(new_crtc_state)) - return true; - - /* - * Workaround : Do not read or write the pipe palette/gamma data while - * GAMMA_MODE is configured for split gamma and IPS_CTL has IPS enabled. - * - * Disable IPS before we program the LUT. - */ - if (IS_HASWELL(dev_priv) && - (new_crtc_state->uapi.color_mgmt_changed || - new_crtc_state->update_pipe) && - new_crtc_state->gamma_mode == GAMMA_MODE_MODE_SPLIT) - return true; - - return !new_crtc_state->ips_enabled; -} - -static bool hsw_ips_pre_update(struct intel_atomic_state *state, - struct intel_crtc *crtc) -{ - const struct intel_crtc_state *old_crtc_state = - intel_atomic_get_old_crtc_state(state, crtc); - - if (!hsw_ips_need_disable(state, crtc)) - return false; - - return hsw_ips_disable(old_crtc_state); -} - -static bool hsw_ips_need_enable(struct intel_atomic_state *state, - struct intel_crtc *crtc) -{ - struct drm_i915_private *dev_priv = to_i915(state->base.dev); - const struct intel_crtc_state *old_crtc_state = - intel_atomic_get_old_crtc_state(state, crtc); - const struct intel_crtc_state *new_crtc_state = - intel_atomic_get_new_crtc_state(state, crtc); - - if (!new_crtc_state->ips_enabled) - return false; - - if (intel_crtc_needs_modeset(new_crtc_state)) - return true; - - /* - * Workaround : Do not read or write the pipe palette/gamma data while - * GAMMA_MODE is configured for split gamma and IPS_CTL has IPS enabled. - * - * Re-enable IPS after the LUT has been programmed. - */ - if (IS_HASWELL(dev_priv) && - (new_crtc_state->uapi.color_mgmt_changed || - new_crtc_state->update_pipe) && - new_crtc_state->gamma_mode == GAMMA_MODE_MODE_SPLIT) - return true; - - /* - * We can't read out IPS on broadwell, assume the worst and - * forcibly enable IPS on the first fastset. - */ - if (new_crtc_state->update_pipe && old_crtc_state->inherited) - return true; - - return !old_crtc_state->ips_enabled; -} - -static void hsw_ips_post_update(struct intel_atomic_state *state, - struct intel_crtc *crtc) -{ - const struct intel_crtc_state *new_crtc_state = - intel_atomic_get_new_crtc_state(state, crtc); - - if (!hsw_ips_need_enable(state, crtc)) - return; - - hsw_ips_enable(new_crtc_state); -} - static bool needs_nv12_wa(const struct intel_crtc_state *crtc_state) { struct drm_i915_private *dev_priv = to_i915(crtc_state->uapi.crtc->dev); @@ -1938,12 +1778,6 @@ static void ilk_crtc_enable(struct intel_atomic_state *state, intel_set_pch_fifo_underrun_reporting(dev_priv, pipe, true); } -/* IPS only exists on ULT machines and is tied to pipe A. */ -static bool hsw_crtc_supports_ips(struct intel_crtc *crtc) -{ - return HAS_IPS(to_i915(crtc->base.dev)) && crtc->pipe == PIPE_A; -} - static void glk_pipe_scaler_clock_gating_wa(struct drm_i915_private *dev_priv, enum pipe pipe, bool apply) { @@ -2811,77 +2645,6 @@ static void intel_connector_verify_state(struct intel_crtc_state *crtc_state, } } -bool hsw_crtc_state_ips_capable(const struct intel_crtc_state *crtc_state) -{ - struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc); - struct drm_i915_private *dev_priv = to_i915(crtc->base.dev); - - /* IPS only exists on ULT machines and is tied to pipe A. */ - if (!hsw_crtc_supports_ips(crtc)) - return false; - - if (!dev_priv->params.enable_ips) - return false; - - if (crtc_state->pipe_bpp > 24) - return false; - - /* - * We compare against max which means we must take - * the increased cdclk requirement into account when - * calculating the new cdclk. - * - * Should measure whether using a lower cdclk w/o IPS - */ - if (IS_BROADWELL(dev_priv) && - crtc_state->pixel_rate > dev_priv->max_cdclk_freq * 95 / 100) - return false; - - return true; -} - -static int hsw_ips_compute_config(struct intel_atomic_state *state, - struct intel_crtc *crtc) -{ - struct drm_i915_private *dev_priv = to_i915(state->base.dev); - struct intel_crtc_state *crtc_state = - intel_atomic_get_new_crtc_state(state, crtc); - - crtc_state->ips_enabled = false; - - if (!hsw_crtc_state_ips_capable(crtc_state)) - return 0; - - /* - * When IPS gets enabled, the pipe CRC changes. Since IPS gets - * enabled and disabled dynamically based on package C states, - * user space can't make reliable use of the CRCs, so let's just - * completely disable it. - */ - if (crtc_state->crc_enabled) - return 0; - - /* IPS should be fine as long as at least one plane is enabled. */ - if (!(crtc_state->active_planes & ~BIT(PLANE_CURSOR))) - return 0; - - if (IS_BROADWELL(dev_priv)) { - const struct intel_cdclk_state *cdclk_state; - - cdclk_state = intel_atomic_get_cdclk_state(state); - if (IS_ERR(cdclk_state)) - return PTR_ERR(cdclk_state); - - /* pixel rate mustn't exceed 95% of cdclk with IPS on BDW */ - if (crtc_state->pixel_rate > cdclk_state->logical.cdclk * 95 / 100) - return 0; - } - - crtc_state->ips_enabled = true; - - return 0; -} - static bool intel_crtc_supports_double_wide(const struct intel_crtc *crtc) { const struct drm_i915_private *dev_priv = to_i915(crtc->base.dev); diff --git a/drivers/gpu/drm/i915/display/intel_display.h b/drivers/gpu/drm/i915/display/intel_display.h index 2315088a280d..b8455e2b2373 100644 --- a/drivers/gpu/drm/i915/display/intel_display.h +++ b/drivers/gpu/drm/i915/display/intel_display.h @@ -632,7 +632,6 @@ void intel_cpu_transcoder_get_m2_n2(struct intel_crtc *crtc, void i9xx_crtc_clock_get(struct intel_crtc *crtc, struct intel_crtc_state *pipe_config); int intel_dotclock_calculate(int link_freq, const struct intel_link_m_n *m_n); -bool hsw_crtc_state_ips_capable(const struct intel_crtc_state *crtc_state); enum intel_display_power_domain intel_port_to_power_domain(enum port port); enum intel_display_power_domain intel_aux_power_domain(struct intel_digital_port *dig_port); -- 2.11.0