--- /dev/null
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright © 2022 Intel Corporation
+ */
+
+#include <drm/drm_blend.h>
+
+#include "intel_atomic.h"
+#include "intel_atomic_plane.h"
+#include "intel_bw.h"
+#include "intel_de.h"
+#include "intel_display.h"
+#include "intel_display_power.h"
+#include "intel_display_types.h"
+#include "intel_fb.h"
+#include "skl_watermark.h"
+
+#include "i915_drv.h"
+#include "i915_fixed.h"
+#include "i915_reg.h"
+#include "intel_pcode.h"
+#include "intel_pm.h"
+
+static void skl_sagv_disable(struct drm_i915_private *i915);
+
+/* Stores plane specific WM parameters */
+struct skl_wm_params {
+ bool x_tiled, y_tiled;
+ bool rc_surface;
+ bool is_planar;
+ u32 width;
+ u8 cpp;
+ u32 plane_pixel_rate;
+ u32 y_min_scanlines;
+ u32 plane_bytes_per_line;
+ uint_fixed_16_16_t plane_blocks_per_line;
+ uint_fixed_16_16_t y_tile_minimum;
+ u32 linetime_us;
+ u32 dbuf_block_size;
+};
+
+u8 intel_enabled_dbuf_slices_mask(struct drm_i915_private *i915)
+{
+ u8 enabled_slices = 0;
+ enum dbuf_slice slice;
+
+ for_each_dbuf_slice(i915, slice) {
+ if (intel_uncore_read(&i915->uncore,
+ DBUF_CTL_S(slice)) & DBUF_POWER_STATE)
+ enabled_slices |= BIT(slice);
+ }
+
+ return enabled_slices;
+}
+
+/*
+ * FIXME: We still don't have the proper code detect if we need to apply the WA,
+ * so assume we'll always need it in order to avoid underruns.
+ */
+static bool skl_needs_memory_bw_wa(struct drm_i915_private *i915)
+{
+ return DISPLAY_VER(i915) == 9;
+}
+
+static bool
+intel_has_sagv(struct drm_i915_private *i915)
+{
+ return DISPLAY_VER(i915) >= 9 && !IS_LP(i915) &&
+ i915->display.sagv.status != I915_SAGV_NOT_CONTROLLED;
+}
+
+static u32
+intel_sagv_block_time(struct drm_i915_private *i915)
+{
+ if (DISPLAY_VER(i915) >= 12) {
+ u32 val = 0;
+ int ret;
+
+ ret = snb_pcode_read(&i915->uncore,
+ GEN12_PCODE_READ_SAGV_BLOCK_TIME_US,
+ &val, NULL);
+ if (ret) {
+ drm_dbg_kms(&i915->drm, "Couldn't read SAGV block time!\n");
+ return 0;
+ }
+
+ return val;
+ } else if (DISPLAY_VER(i915) == 11) {
+ return 10;
+ } else if (DISPLAY_VER(i915) == 9 && !IS_LP(i915)) {
+ return 30;
+ } else {
+ return 0;
+ }
+}
+
+static void intel_sagv_init(struct drm_i915_private *i915)
+{
+ if (!intel_has_sagv(i915))
+ i915->display.sagv.status = I915_SAGV_NOT_CONTROLLED;
+
+ /*
+ * Probe to see if we have working SAGV control.
+ * For icl+ this was already determined by intel_bw_init_hw().
+ */
+ if (DISPLAY_VER(i915) < 11)
+ skl_sagv_disable(i915);
+
+ drm_WARN_ON(&i915->drm, i915->display.sagv.status == I915_SAGV_UNKNOWN);
+
+ i915->display.sagv.block_time_us = intel_sagv_block_time(i915);
+
+ drm_dbg_kms(&i915->drm, "SAGV supported: %s, original SAGV block time: %u us\n",
+ str_yes_no(intel_has_sagv(i915)), i915->display.sagv.block_time_us);
+
+ /* avoid overflow when adding with wm0 latency/etc. */
+ if (drm_WARN(&i915->drm, i915->display.sagv.block_time_us > U16_MAX,
+ "Excessive SAGV block time %u, ignoring\n",
+ i915->display.sagv.block_time_us))
+ i915->display.sagv.block_time_us = 0;
+
+ if (!intel_has_sagv(i915))
+ i915->display.sagv.block_time_us = 0;
+}
+
+/*
+ * SAGV dynamically adjusts the system agent voltage and clock frequencies
+ * depending on power and performance requirements. The display engine access
+ * to system memory is blocked during the adjustment time. Because of the
+ * blocking time, having this enabled can cause full system hangs and/or pipe
+ * underruns if we don't meet all of the following requirements:
+ *
+ * - <= 1 pipe enabled
+ * - All planes can enable watermarks for latencies >= SAGV engine block time
+ * - We're not using an interlaced display configuration
+ */
+static void skl_sagv_enable(struct drm_i915_private *i915)
+{
+ int ret;
+
+ if (!intel_has_sagv(i915))
+ return;
+
+ if (i915->display.sagv.status == I915_SAGV_ENABLED)
+ return;
+
+ drm_dbg_kms(&i915->drm, "Enabling SAGV\n");
+ ret = snb_pcode_write(&i915->uncore, GEN9_PCODE_SAGV_CONTROL,
+ GEN9_SAGV_ENABLE);
+
+ /* We don't need to wait for SAGV when enabling */
+
+ /*
+ * Some skl systems, pre-release machines in particular,
+ * don't actually have SAGV.
+ */
+ if (IS_SKYLAKE(i915) && ret == -ENXIO) {
+ drm_dbg(&i915->drm, "No SAGV found on system, ignoring\n");
+ i915->display.sagv.status = I915_SAGV_NOT_CONTROLLED;
+ return;
+ } else if (ret < 0) {
+ drm_err(&i915->drm, "Failed to enable SAGV\n");
+ return;
+ }
+
+ i915->display.sagv.status = I915_SAGV_ENABLED;
+}
+
+static void skl_sagv_disable(struct drm_i915_private *i915)
+{
+ int ret;
+
+ if (!intel_has_sagv(i915))
+ return;
+
+ if (i915->display.sagv.status == I915_SAGV_DISABLED)
+ return;
+
+ drm_dbg_kms(&i915->drm, "Disabling SAGV\n");
+ /* bspec says to keep retrying for at least 1 ms */
+ ret = skl_pcode_request(&i915->uncore, GEN9_PCODE_SAGV_CONTROL,
+ GEN9_SAGV_DISABLE,
+ GEN9_SAGV_IS_DISABLED, GEN9_SAGV_IS_DISABLED,
+ 1);
+ /*
+ * Some skl systems, pre-release machines in particular,
+ * don't actually have SAGV.
+ */
+ if (IS_SKYLAKE(i915) && ret == -ENXIO) {
+ drm_dbg(&i915->drm, "No SAGV found on system, ignoring\n");
+ i915->display.sagv.status = I915_SAGV_NOT_CONTROLLED;
+ return;
+ } else if (ret < 0) {
+ drm_err(&i915->drm, "Failed to disable SAGV (%d)\n", ret);
+ return;
+ }
+
+ i915->display.sagv.status = I915_SAGV_DISABLED;
+}
+
+static void skl_sagv_pre_plane_update(struct intel_atomic_state *state)
+{
+ struct drm_i915_private *i915 = to_i915(state->base.dev);
+ const struct intel_bw_state *new_bw_state =
+ intel_atomic_get_new_bw_state(state);
+
+ if (!new_bw_state)
+ return;
+
+ if (!intel_can_enable_sagv(i915, new_bw_state))
+ skl_sagv_disable(i915);
+}
+
+static void skl_sagv_post_plane_update(struct intel_atomic_state *state)
+{
+ struct drm_i915_private *i915 = to_i915(state->base.dev);
+ const struct intel_bw_state *new_bw_state =
+ intel_atomic_get_new_bw_state(state);
+
+ if (!new_bw_state)
+ return;
+
+ if (intel_can_enable_sagv(i915, new_bw_state))
+ skl_sagv_enable(i915);
+}
+
+static void icl_sagv_pre_plane_update(struct intel_atomic_state *state)
+{
+ struct drm_i915_private *i915 = to_i915(state->base.dev);
+ const struct intel_bw_state *old_bw_state =
+ intel_atomic_get_old_bw_state(state);
+ const struct intel_bw_state *new_bw_state =
+ intel_atomic_get_new_bw_state(state);
+ u16 old_mask, new_mask;
+
+ if (!new_bw_state)
+ return;
+
+ old_mask = old_bw_state->qgv_points_mask;
+ new_mask = old_bw_state->qgv_points_mask | new_bw_state->qgv_points_mask;
+
+ if (old_mask == new_mask)
+ return;
+
+ WARN_ON(!new_bw_state->base.changed);
+
+ drm_dbg_kms(&i915->drm, "Restricting QGV points: 0x%x -> 0x%x\n",
+ old_mask, new_mask);
+
+ /*
+ * Restrict required qgv points before updating the configuration.
+ * According to BSpec we can't mask and unmask qgv points at the same
+ * time. Also masking should be done before updating the configuration
+ * and unmasking afterwards.
+ */
+ icl_pcode_restrict_qgv_points(i915, new_mask);
+}
+
+static void icl_sagv_post_plane_update(struct intel_atomic_state *state)
+{
+ struct drm_i915_private *i915 = to_i915(state->base.dev);
+ const struct intel_bw_state *old_bw_state =
+ intel_atomic_get_old_bw_state(state);
+ const struct intel_bw_state *new_bw_state =
+ intel_atomic_get_new_bw_state(state);
+ u16 old_mask, new_mask;
+
+ if (!new_bw_state)
+ return;
+
+ old_mask = old_bw_state->qgv_points_mask | new_bw_state->qgv_points_mask;
+ new_mask = new_bw_state->qgv_points_mask;
+
+ if (old_mask == new_mask)
+ return;
+
+ WARN_ON(!new_bw_state->base.changed);
+
+ drm_dbg_kms(&i915->drm, "Relaxing QGV points: 0x%x -> 0x%x\n",
+ old_mask, new_mask);
+
+ /*
+ * Allow required qgv points after updating the configuration.
+ * According to BSpec we can't mask and unmask qgv points at the same
+ * time. Also masking should be done before updating the configuration
+ * and unmasking afterwards.
+ */
+ icl_pcode_restrict_qgv_points(i915, new_mask);
+}
+
+void intel_sagv_pre_plane_update(struct intel_atomic_state *state)
+{
+ struct drm_i915_private *i915 = to_i915(state->base.dev);
+
+ /*
+ * Just return if we can't control SAGV or don't have it.
+ * This is different from situation when we have SAGV but just can't
+ * afford it due to DBuf limitation - in case if SAGV is completely
+ * disabled in a BIOS, we are not even allowed to send a PCode request,
+ * as it will throw an error. So have to check it here.
+ */
+ if (!intel_has_sagv(i915))
+ return;
+
+ if (DISPLAY_VER(i915) >= 11)
+ icl_sagv_pre_plane_update(state);
+ else
+ skl_sagv_pre_plane_update(state);
+}
+
+void intel_sagv_post_plane_update(struct intel_atomic_state *state)
+{
+ struct drm_i915_private *i915 = to_i915(state->base.dev);
+
+ /*
+ * Just return if we can't control SAGV or don't have it.
+ * This is different from situation when we have SAGV but just can't
+ * afford it due to DBuf limitation - in case if SAGV is completely
+ * disabled in a BIOS, we are not even allowed to send a PCode request,
+ * as it will throw an error. So have to check it here.
+ */
+ if (!intel_has_sagv(i915))
+ return;
+
+ if (DISPLAY_VER(i915) >= 11)
+ icl_sagv_post_plane_update(state);
+ else
+ skl_sagv_post_plane_update(state);
+}
+
+static bool skl_crtc_can_enable_sagv(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);
+ enum plane_id plane_id;
+ int max_level = INT_MAX;
+
+ if (!intel_has_sagv(i915))
+ return false;
+
+ if (!crtc_state->hw.active)
+ return true;
+
+ if (crtc_state->hw.pipe_mode.flags & DRM_MODE_FLAG_INTERLACE)
+ return false;
+
+ for_each_plane_id_on_crtc(crtc, plane_id) {
+ const struct skl_plane_wm *wm =
+ &crtc_state->wm.skl.optimal.planes[plane_id];
+ int level;
+
+ /* Skip this plane if it's not enabled */
+ if (!wm->wm[0].enable)
+ continue;
+
+ /* Find the highest enabled wm level for this plane */
+ for (level = ilk_wm_max_level(i915);
+ !wm->wm[level].enable; --level)
+ { }
+
+ /* Highest common enabled wm level for all planes */
+ max_level = min(level, max_level);
+ }
+
+ /* No enabled planes? */
+ if (max_level == INT_MAX)
+ return true;
+
+ for_each_plane_id_on_crtc(crtc, plane_id) {
+ const struct skl_plane_wm *wm =
+ &crtc_state->wm.skl.optimal.planes[plane_id];
+
+ /*
+ * All enabled planes must have enabled a common wm level that
+ * can tolerate memory latencies higher than sagv_block_time_us
+ */
+ if (wm->wm[0].enable && !wm->wm[max_level].can_sagv)
+ return false;
+ }
+
+ return true;
+}
+
+static bool tgl_crtc_can_enable_sagv(const struct intel_crtc_state *crtc_state)
+{
+ struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
+ enum plane_id plane_id;
+
+ if (!crtc_state->hw.active)
+ return true;
+
+ for_each_plane_id_on_crtc(crtc, plane_id) {
+ const struct skl_plane_wm *wm =
+ &crtc_state->wm.skl.optimal.planes[plane_id];
+
+ if (wm->wm[0].enable && !wm->sagv.wm0.enable)
+ return false;
+ }
+
+ return true;
+}
+
+static bool intel_crtc_can_enable_sagv(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 (DISPLAY_VER(i915) >= 12)
+ return tgl_crtc_can_enable_sagv(crtc_state);
+ else
+ return skl_crtc_can_enable_sagv(crtc_state);
+}
+
+bool intel_can_enable_sagv(struct drm_i915_private *i915,
+ const struct intel_bw_state *bw_state)
+{
+ if (DISPLAY_VER(i915) < 11 &&
+ bw_state->active_pipes && !is_power_of_2(bw_state->active_pipes))
+ return false;
+
+ return bw_state->pipe_sagv_reject == 0;
+}
+
+static int intel_compute_sagv_mask(struct intel_atomic_state *state)
+{
+ struct drm_i915_private *i915 = to_i915(state->base.dev);
+ int ret;
+ struct intel_crtc *crtc;
+ struct intel_crtc_state *new_crtc_state;
+ struct intel_bw_state *new_bw_state = NULL;
+ const struct intel_bw_state *old_bw_state = NULL;
+ int i;
+
+ for_each_new_intel_crtc_in_state(state, crtc,
+ new_crtc_state, i) {
+ new_bw_state = intel_atomic_get_bw_state(state);
+ if (IS_ERR(new_bw_state))
+ return PTR_ERR(new_bw_state);
+
+ old_bw_state = intel_atomic_get_old_bw_state(state);
+
+ if (intel_crtc_can_enable_sagv(new_crtc_state))
+ new_bw_state->pipe_sagv_reject &= ~BIT(crtc->pipe);
+ else
+ new_bw_state->pipe_sagv_reject |= BIT(crtc->pipe);
+ }
+
+ if (!new_bw_state)
+ return 0;
+
+ new_bw_state->active_pipes =
+ intel_calc_active_pipes(state, old_bw_state->active_pipes);
+
+ if (new_bw_state->active_pipes != old_bw_state->active_pipes) {
+ ret = intel_atomic_lock_global_state(&new_bw_state->base);
+ if (ret)
+ return ret;
+ }
+
+ if (intel_can_enable_sagv(i915, new_bw_state) !=
+ intel_can_enable_sagv(i915, old_bw_state)) {
+ ret = intel_atomic_serialize_global_state(&new_bw_state->base);
+ if (ret)
+ return ret;
+ } else if (new_bw_state->pipe_sagv_reject != old_bw_state->pipe_sagv_reject) {
+ ret = intel_atomic_lock_global_state(&new_bw_state->base);
+ if (ret)
+ return ret;
+ }
+
+ for_each_new_intel_crtc_in_state(state, crtc,
+ new_crtc_state, i) {
+ struct skl_pipe_wm *pipe_wm = &new_crtc_state->wm.skl.optimal;
+
+ /*
+ * We store use_sagv_wm in the crtc state rather than relying on
+ * that bw state since we have no convenient way to get at the
+ * latter from the plane commit hooks (especially in the legacy
+ * cursor case)
+ */
+ pipe_wm->use_sagv_wm = !HAS_HW_SAGV_WM(i915) &&
+ DISPLAY_VER(i915) >= 12 &&
+ intel_can_enable_sagv(i915, new_bw_state);
+ }
+
+ return 0;
+}
+
+static u16 skl_ddb_entry_init(struct skl_ddb_entry *entry,
+ u16 start, u16 end)
+{
+ entry->start = start;
+ entry->end = end;
+
+ return end;
+}
+
+static int intel_dbuf_slice_size(struct drm_i915_private *i915)
+{
+ return INTEL_INFO(i915)->display.dbuf.size /
+ hweight8(INTEL_INFO(i915)->display.dbuf.slice_mask);
+}
+
+static void
+skl_ddb_entry_for_slices(struct drm_i915_private *i915, u8 slice_mask,
+ struct skl_ddb_entry *ddb)
+{
+ int slice_size = intel_dbuf_slice_size(i915);
+
+ if (!slice_mask) {
+ ddb->start = 0;
+ ddb->end = 0;
+ return;
+ }
+
+ ddb->start = (ffs(slice_mask) - 1) * slice_size;
+ ddb->end = fls(slice_mask) * slice_size;
+
+ WARN_ON(ddb->start >= ddb->end);
+ WARN_ON(ddb->end > INTEL_INFO(i915)->display.dbuf.size);
+}
+
+static unsigned int mbus_ddb_offset(struct drm_i915_private *i915, u8 slice_mask)
+{
+ struct skl_ddb_entry ddb;
+
+ if (slice_mask & (BIT(DBUF_S1) | BIT(DBUF_S2)))
+ slice_mask = BIT(DBUF_S1);
+ else if (slice_mask & (BIT(DBUF_S3) | BIT(DBUF_S4)))
+ slice_mask = BIT(DBUF_S3);
+
+ skl_ddb_entry_for_slices(i915, slice_mask, &ddb);
+
+ return ddb.start;
+}
+
+u32 skl_ddb_dbuf_slice_mask(struct drm_i915_private *i915,
+ const struct skl_ddb_entry *entry)
+{
+ int slice_size = intel_dbuf_slice_size(i915);
+ enum dbuf_slice start_slice, end_slice;
+ u8 slice_mask = 0;
+
+ if (!skl_ddb_entry_size(entry))
+ return 0;
+
+ start_slice = entry->start / slice_size;
+ end_slice = (entry->end - 1) / slice_size;
+
+ /*
+ * Per plane DDB entry can in a really worst case be on multiple slices
+ * but single entry is anyway contigious.
+ */
+ while (start_slice <= end_slice) {
+ slice_mask |= BIT(start_slice);
+ start_slice++;
+ }
+
+ return slice_mask;
+}
+
+static unsigned int intel_crtc_ddb_weight(const struct intel_crtc_state *crtc_state)
+{
+ const struct drm_display_mode *pipe_mode = &crtc_state->hw.pipe_mode;
+ int hdisplay, vdisplay;
+
+ if (!crtc_state->hw.active)
+ return 0;
+
+ /*
+ * Watermark/ddb requirement highly depends upon width of the
+ * framebuffer, So instead of allocating DDB equally among pipes
+ * distribute DDB based on resolution/width of the display.
+ */
+ drm_mode_get_hv_timing(pipe_mode, &hdisplay, &vdisplay);
+
+ return hdisplay;
+}
+
+static void intel_crtc_dbuf_weights(const struct intel_dbuf_state *dbuf_state,
+ enum pipe for_pipe,
+ unsigned int *weight_start,
+ unsigned int *weight_end,
+ unsigned int *weight_total)
+{
+ struct drm_i915_private *i915 =
+ to_i915(dbuf_state->base.state->base.dev);
+ enum pipe pipe;
+
+ *weight_start = 0;
+ *weight_end = 0;
+ *weight_total = 0;
+
+ for_each_pipe(i915, pipe) {
+ int weight = dbuf_state->weight[pipe];
+
+ /*
+ * Do not account pipes using other slice sets
+ * luckily as of current BSpec slice sets do not partially
+ * intersect(pipes share either same one slice or same slice set
+ * i.e no partial intersection), so it is enough to check for
+ * equality for now.
+ */
+ if (dbuf_state->slices[pipe] != dbuf_state->slices[for_pipe])
+ continue;
+
+ *weight_total += weight;
+ if (pipe < for_pipe) {
+ *weight_start += weight;
+ *weight_end += weight;
+ } else if (pipe == for_pipe) {
+ *weight_end += weight;
+ }
+ }
+}
+
+static int
+skl_crtc_allocate_ddb(struct intel_atomic_state *state, struct intel_crtc *crtc)
+{
+ struct drm_i915_private *i915 = to_i915(crtc->base.dev);
+ unsigned int weight_total, weight_start, weight_end;
+ const struct intel_dbuf_state *old_dbuf_state =
+ intel_atomic_get_old_dbuf_state(state);
+ struct intel_dbuf_state *new_dbuf_state =
+ intel_atomic_get_new_dbuf_state(state);
+ struct intel_crtc_state *crtc_state;
+ struct skl_ddb_entry ddb_slices;
+ enum pipe pipe = crtc->pipe;
+ unsigned int mbus_offset = 0;
+ u32 ddb_range_size;
+ u32 dbuf_slice_mask;
+ u32 start, end;
+ int ret;
+
+ if (new_dbuf_state->weight[pipe] == 0) {
+ skl_ddb_entry_init(&new_dbuf_state->ddb[pipe], 0, 0);
+ goto out;
+ }
+
+ dbuf_slice_mask = new_dbuf_state->slices[pipe];
+
+ skl_ddb_entry_for_slices(i915, dbuf_slice_mask, &ddb_slices);
+ mbus_offset = mbus_ddb_offset(i915, dbuf_slice_mask);
+ ddb_range_size = skl_ddb_entry_size(&ddb_slices);
+
+ intel_crtc_dbuf_weights(new_dbuf_state, pipe,
+ &weight_start, &weight_end, &weight_total);
+
+ start = ddb_range_size * weight_start / weight_total;
+ end = ddb_range_size * weight_end / weight_total;
+
+ skl_ddb_entry_init(&new_dbuf_state->ddb[pipe],
+ ddb_slices.start - mbus_offset + start,
+ ddb_slices.start - mbus_offset + end);
+
+out:
+ if (old_dbuf_state->slices[pipe] == new_dbuf_state->slices[pipe] &&
+ skl_ddb_entry_equal(&old_dbuf_state->ddb[pipe],
+ &new_dbuf_state->ddb[pipe]))
+ return 0;
+
+ ret = intel_atomic_lock_global_state(&new_dbuf_state->base);
+ if (ret)
+ return ret;
+
+ crtc_state = intel_atomic_get_crtc_state(&state->base, crtc);
+ if (IS_ERR(crtc_state))
+ return PTR_ERR(crtc_state);
+
+ /*
+ * Used for checking overlaps, so we need absolute
+ * offsets instead of MBUS relative offsets.
+ */
+ crtc_state->wm.skl.ddb.start = mbus_offset + new_dbuf_state->ddb[pipe].start;
+ crtc_state->wm.skl.ddb.end = mbus_offset + new_dbuf_state->ddb[pipe].end;
+
+ drm_dbg_kms(&i915->drm,
+ "[CRTC:%d:%s] dbuf slices 0x%x -> 0x%x, ddb (%d - %d) -> (%d - %d), active pipes 0x%x -> 0x%x\n",
+ crtc->base.base.id, crtc->base.name,
+ old_dbuf_state->slices[pipe], new_dbuf_state->slices[pipe],
+ old_dbuf_state->ddb[pipe].start, old_dbuf_state->ddb[pipe].end,
+ new_dbuf_state->ddb[pipe].start, new_dbuf_state->ddb[pipe].end,
+ old_dbuf_state->active_pipes, new_dbuf_state->active_pipes);
+
+ return 0;
+}
+
+static int skl_compute_wm_params(const struct intel_crtc_state *crtc_state,
+ int width, const struct drm_format_info *format,
+ u64 modifier, unsigned int rotation,
+ u32 plane_pixel_rate, struct skl_wm_params *wp,
+ int color_plane);
+
+static void skl_compute_plane_wm(const struct intel_crtc_state *crtc_state,
+ struct intel_plane *plane,
+ int level,
+ unsigned int latency,
+ const struct skl_wm_params *wp,
+ const struct skl_wm_level *result_prev,
+ struct skl_wm_level *result /* out */);
+
+static unsigned int
+skl_cursor_allocation(const struct intel_crtc_state *crtc_state,
+ int num_active)
+{
+ struct intel_plane *plane = to_intel_plane(crtc_state->uapi.crtc->cursor);
+ struct drm_i915_private *i915 = to_i915(crtc_state->uapi.crtc->dev);
+ int level, max_level = ilk_wm_max_level(i915);
+ struct skl_wm_level wm = {};
+ int ret, min_ddb_alloc = 0;
+ struct skl_wm_params wp;
+
+ ret = skl_compute_wm_params(crtc_state, 256,
+ drm_format_info(DRM_FORMAT_ARGB8888),
+ DRM_FORMAT_MOD_LINEAR,
+ DRM_MODE_ROTATE_0,
+ crtc_state->pixel_rate, &wp, 0);
+ drm_WARN_ON(&i915->drm, ret);
+
+ for (level = 0; level <= max_level; level++) {
+ unsigned int latency = i915->display.wm.skl_latency[level];
+
+ skl_compute_plane_wm(crtc_state, plane, level, latency, &wp, &wm, &wm);
+ if (wm.min_ddb_alloc == U16_MAX)
+ break;
+
+ min_ddb_alloc = wm.min_ddb_alloc;
+ }
+
+ return max(num_active == 1 ? 32 : 8, min_ddb_alloc);
+}
+
+static void skl_ddb_entry_init_from_hw(struct skl_ddb_entry *entry, u32 reg)
+{
+ skl_ddb_entry_init(entry,
+ REG_FIELD_GET(PLANE_BUF_START_MASK, reg),
+ REG_FIELD_GET(PLANE_BUF_END_MASK, reg));
+ if (entry->end)
+ entry->end++;
+}
+
+static void
+skl_ddb_get_hw_plane_state(struct drm_i915_private *i915,
+ const enum pipe pipe,
+ const enum plane_id plane_id,
+ struct skl_ddb_entry *ddb,
+ struct skl_ddb_entry *ddb_y)
+{
+ u32 val;
+
+ /* Cursor doesn't support NV12/planar, so no extra calculation needed */
+ if (plane_id == PLANE_CURSOR) {
+ val = intel_uncore_read(&i915->uncore, CUR_BUF_CFG(pipe));
+ skl_ddb_entry_init_from_hw(ddb, val);
+ return;
+ }
+
+ val = intel_uncore_read(&i915->uncore, PLANE_BUF_CFG(pipe, plane_id));
+ skl_ddb_entry_init_from_hw(ddb, val);
+
+ if (DISPLAY_VER(i915) >= 11)
+ return;
+
+ val = intel_uncore_read(&i915->uncore, PLANE_NV12_BUF_CFG(pipe, plane_id));
+ skl_ddb_entry_init_from_hw(ddb_y, val);
+}
+
+static void skl_pipe_ddb_get_hw_state(struct intel_crtc *crtc,
+ struct skl_ddb_entry *ddb,
+ struct skl_ddb_entry *ddb_y)
+{
+ struct drm_i915_private *i915 = to_i915(crtc->base.dev);
+ enum intel_display_power_domain power_domain;
+ enum pipe pipe = crtc->pipe;
+ intel_wakeref_t wakeref;
+ enum plane_id plane_id;
+
+ power_domain = POWER_DOMAIN_PIPE(pipe);
+ wakeref = intel_display_power_get_if_enabled(i915, power_domain);
+ if (!wakeref)
+ return;
+
+ for_each_plane_id_on_crtc(crtc, plane_id)
+ skl_ddb_get_hw_plane_state(i915, pipe,
+ plane_id,
+ &ddb[plane_id],
+ &ddb_y[plane_id]);
+
+ intel_display_power_put(i915, power_domain, wakeref);
+}
+
+struct dbuf_slice_conf_entry {
+ u8 active_pipes;
+ u8 dbuf_mask[I915_MAX_PIPES];
+ bool join_mbus;
+};
+
+/*
+ * Table taken from Bspec 12716
+ * Pipes do have some preferred DBuf slice affinity,
+ * plus there are some hardcoded requirements on how
+ * those should be distributed for multipipe scenarios.
+ * For more DBuf slices algorithm can get even more messy
+ * and less readable, so decided to use a table almost
+ * as is from BSpec itself - that way it is at least easier
+ * to compare, change and check.
+ */
+static const struct dbuf_slice_conf_entry icl_allowed_dbufs[] =
+/* Autogenerated with igt/tools/intel_dbuf_map tool: */
+{
+ {
+ .active_pipes = BIT(PIPE_A),
+ .dbuf_mask = {
+ [PIPE_A] = BIT(DBUF_S1),
+ },
+ },
+ {
+ .active_pipes = BIT(PIPE_B),
+ .dbuf_mask = {
+ [PIPE_B] = BIT(DBUF_S1),
+ },
+ },
+ {
+ .active_pipes = BIT(PIPE_A) | BIT(PIPE_B),
+ .dbuf_mask = {
+ [PIPE_A] = BIT(DBUF_S1),
+ [PIPE_B] = BIT(DBUF_S2),
+ },
+ },
+ {
+ .active_pipes = BIT(PIPE_C),
+ .dbuf_mask = {
+ [PIPE_C] = BIT(DBUF_S2),
+ },
+ },
+ {
+ .active_pipes = BIT(PIPE_A) | BIT(PIPE_C),
+ .dbuf_mask = {
+ [PIPE_A] = BIT(DBUF_S1),
+ [PIPE_C] = BIT(DBUF_S2),
+ },
+ },
+ {
+ .active_pipes = BIT(PIPE_B) | BIT(PIPE_C),
+ .dbuf_mask = {
+ [PIPE_B] = BIT(DBUF_S1),
+ [PIPE_C] = BIT(DBUF_S2),
+ },
+ },
+ {
+ .active_pipes = BIT(PIPE_A) | BIT(PIPE_B) | BIT(PIPE_C),
+ .dbuf_mask = {
+ [PIPE_A] = BIT(DBUF_S1),
+ [PIPE_B] = BIT(DBUF_S1),
+ [PIPE_C] = BIT(DBUF_S2),
+ },
+ },
+ {}
+};
+
+/*
+ * Table taken from Bspec 49255
+ * Pipes do have some preferred DBuf slice affinity,
+ * plus there are some hardcoded requirements on how
+ * those should be distributed for multipipe scenarios.
+ * For more DBuf slices algorithm can get even more messy
+ * and less readable, so decided to use a table almost
+ * as is from BSpec itself - that way it is at least easier
+ * to compare, change and check.
+ */
+static const struct dbuf_slice_conf_entry tgl_allowed_dbufs[] =
+/* Autogenerated with igt/tools/intel_dbuf_map tool: */
+{
+ {
+ .active_pipes = BIT(PIPE_A),
+ .dbuf_mask = {
+ [PIPE_A] = BIT(DBUF_S1) | BIT(DBUF_S2),
+ },
+ },
+ {
+ .active_pipes = BIT(PIPE_B),
+ .dbuf_mask = {
+ [PIPE_B] = BIT(DBUF_S1) | BIT(DBUF_S2),
+ },
+ },
+ {
+ .active_pipes = BIT(PIPE_A) | BIT(PIPE_B),
+ .dbuf_mask = {
+ [PIPE_A] = BIT(DBUF_S2),
+ [PIPE_B] = BIT(DBUF_S1),
+ },
+ },
+ {
+ .active_pipes = BIT(PIPE_C),
+ .dbuf_mask = {
+ [PIPE_C] = BIT(DBUF_S2) | BIT(DBUF_S1),
+ },
+ },
+ {
+ .active_pipes = BIT(PIPE_A) | BIT(PIPE_C),
+ .dbuf_mask = {
+ [PIPE_A] = BIT(DBUF_S1),
+ [PIPE_C] = BIT(DBUF_S2),
+ },
+ },
+ {
+ .active_pipes = BIT(PIPE_B) | BIT(PIPE_C),
+ .dbuf_mask = {
+ [PIPE_B] = BIT(DBUF_S1),
+ [PIPE_C] = BIT(DBUF_S2),
+ },
+ },
+ {
+ .active_pipes = BIT(PIPE_A) | BIT(PIPE_B) | BIT(PIPE_C),
+ .dbuf_mask = {
+ [PIPE_A] = BIT(DBUF_S1),
+ [PIPE_B] = BIT(DBUF_S1),
+ [PIPE_C] = BIT(DBUF_S2),
+ },
+ },
+ {
+ .active_pipes = BIT(PIPE_D),
+ .dbuf_mask = {
+ [PIPE_D] = BIT(DBUF_S2) | BIT(DBUF_S1),
+ },
+ },
+ {
+ .active_pipes = BIT(PIPE_A) | BIT(PIPE_D),
+ .dbuf_mask = {
+ [PIPE_A] = BIT(DBUF_S1),
+ [PIPE_D] = BIT(DBUF_S2),
+ },
+ },
+ {
+ .active_pipes = BIT(PIPE_B) | BIT(PIPE_D),
+ .dbuf_mask = {
+ [PIPE_B] = BIT(DBUF_S1),
+ [PIPE_D] = BIT(DBUF_S2),
+ },
+ },
+ {
+ .active_pipes = BIT(PIPE_A) | BIT(PIPE_B) | BIT(PIPE_D),
+ .dbuf_mask = {
+ [PIPE_A] = BIT(DBUF_S1),
+ [PIPE_B] = BIT(DBUF_S1),
+ [PIPE_D] = BIT(DBUF_S2),
+ },
+ },
+ {
+ .active_pipes = BIT(PIPE_C) | BIT(PIPE_D),
+ .dbuf_mask = {
+ [PIPE_C] = BIT(DBUF_S1),
+ [PIPE_D] = BIT(DBUF_S2),
+ },
+ },
+ {
+ .active_pipes = BIT(PIPE_A) | BIT(PIPE_C) | BIT(PIPE_D),
+ .dbuf_mask = {
+ [PIPE_A] = BIT(DBUF_S1),
+ [PIPE_C] = BIT(DBUF_S2),
+ [PIPE_D] = BIT(DBUF_S2),
+ },
+ },
+ {
+ .active_pipes = BIT(PIPE_B) | BIT(PIPE_C) | BIT(PIPE_D),
+ .dbuf_mask = {
+ [PIPE_B] = BIT(DBUF_S1),
+ [PIPE_C] = BIT(DBUF_S2),
+ [PIPE_D] = BIT(DBUF_S2),
+ },
+ },
+ {
+ .active_pipes = BIT(PIPE_A) | BIT(PIPE_B) | BIT(PIPE_C) | BIT(PIPE_D),
+ .dbuf_mask = {
+ [PIPE_A] = BIT(DBUF_S1),
+ [PIPE_B] = BIT(DBUF_S1),
+ [PIPE_C] = BIT(DBUF_S2),
+ [PIPE_D] = BIT(DBUF_S2),
+ },
+ },
+ {}
+};
+
+static const struct dbuf_slice_conf_entry dg2_allowed_dbufs[] = {
+ {
+ .active_pipes = BIT(PIPE_A),
+ .dbuf_mask = {
+ [PIPE_A] = BIT(DBUF_S1) | BIT(DBUF_S2),
+ },
+ },
+ {
+ .active_pipes = BIT(PIPE_B),
+ .dbuf_mask = {
+ [PIPE_B] = BIT(DBUF_S1) | BIT(DBUF_S2),
+ },
+ },
+ {
+ .active_pipes = BIT(PIPE_A) | BIT(PIPE_B),
+ .dbuf_mask = {
+ [PIPE_A] = BIT(DBUF_S1),
+ [PIPE_B] = BIT(DBUF_S2),
+ },
+ },
+ {
+ .active_pipes = BIT(PIPE_C),
+ .dbuf_mask = {
+ [PIPE_C] = BIT(DBUF_S3) | BIT(DBUF_S4),
+ },
+ },
+ {
+ .active_pipes = BIT(PIPE_A) | BIT(PIPE_C),
+ .dbuf_mask = {
+ [PIPE_A] = BIT(DBUF_S1) | BIT(DBUF_S2),
+ [PIPE_C] = BIT(DBUF_S3) | BIT(DBUF_S4),
+ },
+ },
+ {
+ .active_pipes = BIT(PIPE_B) | BIT(PIPE_C),
+ .dbuf_mask = {
+ [PIPE_B] = BIT(DBUF_S1) | BIT(DBUF_S2),
+ [PIPE_C] = BIT(DBUF_S3) | BIT(DBUF_S4),
+ },
+ },
+ {
+ .active_pipes = BIT(PIPE_A) | BIT(PIPE_B) | BIT(PIPE_C),
+ .dbuf_mask = {
+ [PIPE_A] = BIT(DBUF_S1),
+ [PIPE_B] = BIT(DBUF_S2),
+ [PIPE_C] = BIT(DBUF_S3) | BIT(DBUF_S4),
+ },
+ },
+ {
+ .active_pipes = BIT(PIPE_D),
+ .dbuf_mask = {
+ [PIPE_D] = BIT(DBUF_S3) | BIT(DBUF_S4),
+ },
+ },
+ {
+ .active_pipes = BIT(PIPE_A) | BIT(PIPE_D),
+ .dbuf_mask = {
+ [PIPE_A] = BIT(DBUF_S1) | BIT(DBUF_S2),
+ [PIPE_D] = BIT(DBUF_S3) | BIT(DBUF_S4),
+ },
+ },
+ {
+ .active_pipes = BIT(PIPE_B) | BIT(PIPE_D),
+ .dbuf_mask = {
+ [PIPE_B] = BIT(DBUF_S1) | BIT(DBUF_S2),
+ [PIPE_D] = BIT(DBUF_S3) | BIT(DBUF_S4),
+ },
+ },
+ {
+ .active_pipes = BIT(PIPE_A) | BIT(PIPE_B) | BIT(PIPE_D),
+ .dbuf_mask = {
+ [PIPE_A] = BIT(DBUF_S1),
+ [PIPE_B] = BIT(DBUF_S2),
+ [PIPE_D] = BIT(DBUF_S3) | BIT(DBUF_S4),
+ },
+ },
+ {
+ .active_pipes = BIT(PIPE_C) | BIT(PIPE_D),
+ .dbuf_mask = {
+ [PIPE_C] = BIT(DBUF_S3),
+ [PIPE_D] = BIT(DBUF_S4),
+ },
+ },
+ {
+ .active_pipes = BIT(PIPE_A) | BIT(PIPE_C) | BIT(PIPE_D),
+ .dbuf_mask = {
+ [PIPE_A] = BIT(DBUF_S1) | BIT(DBUF_S2),
+ [PIPE_C] = BIT(DBUF_S3),
+ [PIPE_D] = BIT(DBUF_S4),
+ },
+ },
+ {
+ .active_pipes = BIT(PIPE_B) | BIT(PIPE_C) | BIT(PIPE_D),
+ .dbuf_mask = {
+ [PIPE_B] = BIT(DBUF_S1) | BIT(DBUF_S2),
+ [PIPE_C] = BIT(DBUF_S3),
+ [PIPE_D] = BIT(DBUF_S4),
+ },
+ },
+ {
+ .active_pipes = BIT(PIPE_A) | BIT(PIPE_B) | BIT(PIPE_C) | BIT(PIPE_D),
+ .dbuf_mask = {
+ [PIPE_A] = BIT(DBUF_S1),
+ [PIPE_B] = BIT(DBUF_S2),
+ [PIPE_C] = BIT(DBUF_S3),
+ [PIPE_D] = BIT(DBUF_S4),
+ },
+ },
+ {}
+};
+
+static const struct dbuf_slice_conf_entry adlp_allowed_dbufs[] = {
+ /*
+ * Keep the join_mbus cases first so check_mbus_joined()
+ * will prefer them over the !join_mbus cases.
+ */
+ {
+ .active_pipes = BIT(PIPE_A),
+ .dbuf_mask = {
+ [PIPE_A] = BIT(DBUF_S1) | BIT(DBUF_S2) | BIT(DBUF_S3) | BIT(DBUF_S4),
+ },
+ .join_mbus = true,
+ },
+ {
+ .active_pipes = BIT(PIPE_B),
+ .dbuf_mask = {
+ [PIPE_B] = BIT(DBUF_S1) | BIT(DBUF_S2) | BIT(DBUF_S3) | BIT(DBUF_S4),
+ },
+ .join_mbus = true,
+ },
+ {
+ .active_pipes = BIT(PIPE_A),
+ .dbuf_mask = {
+ [PIPE_A] = BIT(DBUF_S1) | BIT(DBUF_S2),
+ },
+ .join_mbus = false,
+ },
+ {
+ .active_pipes = BIT(PIPE_B),
+ .dbuf_mask = {
+ [PIPE_B] = BIT(DBUF_S3) | BIT(DBUF_S4),
+ },
+ .join_mbus = false,
+ },
+ {
+ .active_pipes = BIT(PIPE_A) | BIT(PIPE_B),
+ .dbuf_mask = {
+ [PIPE_A] = BIT(DBUF_S1) | BIT(DBUF_S2),
+ [PIPE_B] = BIT(DBUF_S3) | BIT(DBUF_S4),
+ },
+ },
+ {
+ .active_pipes = BIT(PIPE_C),
+ .dbuf_mask = {
+ [PIPE_C] = BIT(DBUF_S3) | BIT(DBUF_S4),
+ },
+ },
+ {
+ .active_pipes = BIT(PIPE_A) | BIT(PIPE_C),
+ .dbuf_mask = {
+ [PIPE_A] = BIT(DBUF_S1) | BIT(DBUF_S2),
+ [PIPE_C] = BIT(DBUF_S3) | BIT(DBUF_S4),
+ },
+ },
+ {
+ .active_pipes = BIT(PIPE_B) | BIT(PIPE_C),
+ .dbuf_mask = {
+ [PIPE_B] = BIT(DBUF_S3) | BIT(DBUF_S4),
+ [PIPE_C] = BIT(DBUF_S3) | BIT(DBUF_S4),
+ },
+ },
+ {
+ .active_pipes = BIT(PIPE_A) | BIT(PIPE_B) | BIT(PIPE_C),
+ .dbuf_mask = {
+ [PIPE_A] = BIT(DBUF_S1) | BIT(DBUF_S2),
+ [PIPE_B] = BIT(DBUF_S3) | BIT(DBUF_S4),
+ [PIPE_C] = BIT(DBUF_S3) | BIT(DBUF_S4),
+ },
+ },
+ {
+ .active_pipes = BIT(PIPE_D),
+ .dbuf_mask = {
+ [PIPE_D] = BIT(DBUF_S1) | BIT(DBUF_S2),
+ },
+ },
+ {
+ .active_pipes = BIT(PIPE_A) | BIT(PIPE_D),
+ .dbuf_mask = {
+ [PIPE_A] = BIT(DBUF_S1) | BIT(DBUF_S2),
+ [PIPE_D] = BIT(DBUF_S1) | BIT(DBUF_S2),
+ },
+ },
+ {
+ .active_pipes = BIT(PIPE_B) | BIT(PIPE_D),
+ .dbuf_mask = {
+ [PIPE_B] = BIT(DBUF_S3) | BIT(DBUF_S4),
+ [PIPE_D] = BIT(DBUF_S1) | BIT(DBUF_S2),
+ },
+ },
+ {
+ .active_pipes = BIT(PIPE_A) | BIT(PIPE_B) | BIT(PIPE_D),
+ .dbuf_mask = {
+ [PIPE_A] = BIT(DBUF_S1) | BIT(DBUF_S2),
+ [PIPE_B] = BIT(DBUF_S3) | BIT(DBUF_S4),
+ [PIPE_D] = BIT(DBUF_S1) | BIT(DBUF_S2),
+ },
+ },
+ {
+ .active_pipes = BIT(PIPE_C) | BIT(PIPE_D),
+ .dbuf_mask = {
+ [PIPE_C] = BIT(DBUF_S3) | BIT(DBUF_S4),
+ [PIPE_D] = BIT(DBUF_S1) | BIT(DBUF_S2),
+ },
+ },
+ {
+ .active_pipes = BIT(PIPE_A) | BIT(PIPE_C) | BIT(PIPE_D),
+ .dbuf_mask = {
+ [PIPE_A] = BIT(DBUF_S1) | BIT(DBUF_S2),
+ [PIPE_C] = BIT(DBUF_S3) | BIT(DBUF_S4),
+ [PIPE_D] = BIT(DBUF_S1) | BIT(DBUF_S2),
+ },
+ },
+ {
+ .active_pipes = BIT(PIPE_B) | BIT(PIPE_C) | BIT(PIPE_D),
+ .dbuf_mask = {
+ [PIPE_B] = BIT(DBUF_S3) | BIT(DBUF_S4),
+ [PIPE_C] = BIT(DBUF_S3) | BIT(DBUF_S4),
+ [PIPE_D] = BIT(DBUF_S1) | BIT(DBUF_S2),
+ },
+ },
+ {
+ .active_pipes = BIT(PIPE_A) | BIT(PIPE_B) | BIT(PIPE_C) | BIT(PIPE_D),
+ .dbuf_mask = {
+ [PIPE_A] = BIT(DBUF_S1) | BIT(DBUF_S2),
+ [PIPE_B] = BIT(DBUF_S3) | BIT(DBUF_S4),
+ [PIPE_C] = BIT(DBUF_S3) | BIT(DBUF_S4),
+ [PIPE_D] = BIT(DBUF_S1) | BIT(DBUF_S2),
+ },
+ },
+ {}
+
+};
+
+static bool check_mbus_joined(u8 active_pipes,
+ const struct dbuf_slice_conf_entry *dbuf_slices)
+{
+ int i;
+
+ for (i = 0; dbuf_slices[i].active_pipes != 0; i++) {
+ if (dbuf_slices[i].active_pipes == active_pipes)
+ return dbuf_slices[i].join_mbus;
+ }
+ return false;
+}
+
+static bool adlp_check_mbus_joined(u8 active_pipes)
+{
+ return check_mbus_joined(active_pipes, adlp_allowed_dbufs);
+}
+
+static u8 compute_dbuf_slices(enum pipe pipe, u8 active_pipes, bool join_mbus,
+ const struct dbuf_slice_conf_entry *dbuf_slices)
+{
+ int i;
+
+ for (i = 0; dbuf_slices[i].active_pipes != 0; i++) {
+ if (dbuf_slices[i].active_pipes == active_pipes &&
+ dbuf_slices[i].join_mbus == join_mbus)
+ return dbuf_slices[i].dbuf_mask[pipe];
+ }
+ return 0;
+}
+
+/*
+ * This function finds an entry with same enabled pipe configuration and
+ * returns correspondent DBuf slice mask as stated in BSpec for particular
+ * platform.
+ */
+static u8 icl_compute_dbuf_slices(enum pipe pipe, u8 active_pipes, bool join_mbus)
+{
+ /*
+ * FIXME: For ICL this is still a bit unclear as prev BSpec revision
+ * required calculating "pipe ratio" in order to determine
+ * if one or two slices can be used for single pipe configurations
+ * as additional constraint to the existing table.
+ * However based on recent info, it should be not "pipe ratio"
+ * but rather ratio between pixel_rate and cdclk with additional
+ * constants, so for now we are using only table until this is
+ * clarified. Also this is the reason why crtc_state param is
+ * still here - we will need it once those additional constraints
+ * pop up.
+ */
+ return compute_dbuf_slices(pipe, active_pipes, join_mbus,
+ icl_allowed_dbufs);
+}
+
+static u8 tgl_compute_dbuf_slices(enum pipe pipe, u8 active_pipes, bool join_mbus)
+{
+ return compute_dbuf_slices(pipe, active_pipes, join_mbus,
+ tgl_allowed_dbufs);
+}
+
+static u8 adlp_compute_dbuf_slices(enum pipe pipe, u8 active_pipes, bool join_mbus)
+{
+ return compute_dbuf_slices(pipe, active_pipes, join_mbus,
+ adlp_allowed_dbufs);
+}
+
+static u8 dg2_compute_dbuf_slices(enum pipe pipe, u8 active_pipes, bool join_mbus)
+{
+ return compute_dbuf_slices(pipe, active_pipes, join_mbus,
+ dg2_allowed_dbufs);
+}
+
+static u8 skl_compute_dbuf_slices(struct intel_crtc *crtc, u8 active_pipes, bool join_mbus)
+{
+ struct drm_i915_private *i915 = to_i915(crtc->base.dev);
+ enum pipe pipe = crtc->pipe;
+
+ if (IS_DG2(i915))
+ return dg2_compute_dbuf_slices(pipe, active_pipes, join_mbus);
+ else if (DISPLAY_VER(i915) >= 13)
+ return adlp_compute_dbuf_slices(pipe, active_pipes, join_mbus);
+ else if (DISPLAY_VER(i915) == 12)
+ return tgl_compute_dbuf_slices(pipe, active_pipes, join_mbus);
+ else if (DISPLAY_VER(i915) == 11)
+ return icl_compute_dbuf_slices(pipe, active_pipes, join_mbus);
+ /*
+ * For anything else just return one slice yet.
+ * Should be extended for other platforms.
+ */
+ return active_pipes & BIT(pipe) ? BIT(DBUF_S1) : 0;
+}
+
+static bool
+use_minimal_wm0_only(const struct intel_crtc_state *crtc_state,
+ struct intel_plane *plane)
+{
+ struct drm_i915_private *i915 = to_i915(plane->base.dev);
+
+ return DISPLAY_VER(i915) >= 13 &&
+ crtc_state->uapi.async_flip &&
+ plane->async_flip;
+}
+
+static u64
+skl_total_relative_data_rate(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);
+ enum plane_id plane_id;
+ u64 data_rate = 0;
+
+ for_each_plane_id_on_crtc(crtc, plane_id) {
+ if (plane_id == PLANE_CURSOR)
+ continue;
+
+ data_rate += crtc_state->rel_data_rate[plane_id];
+
+ if (DISPLAY_VER(i915) < 11)
+ data_rate += crtc_state->rel_data_rate_y[plane_id];
+ }
+
+ return data_rate;
+}
+
+static const struct skl_wm_level *
+skl_plane_wm_level(const struct skl_pipe_wm *pipe_wm,
+ enum plane_id plane_id,
+ int level)
+{
+ const struct skl_plane_wm *wm = &pipe_wm->planes[plane_id];
+
+ if (level == 0 && pipe_wm->use_sagv_wm)
+ return &wm->sagv.wm0;
+
+ return &wm->wm[level];
+}
+
+static const struct skl_wm_level *
+skl_plane_trans_wm(const struct skl_pipe_wm *pipe_wm,
+ enum plane_id plane_id)
+{
+ const struct skl_plane_wm *wm = &pipe_wm->planes[plane_id];
+
+ if (pipe_wm->use_sagv_wm)
+ return &wm->sagv.trans_wm;
+
+ return &wm->trans_wm;
+}
+
+/*
+ * We only disable the watermarks for each plane if
+ * they exceed the ddb allocation of said plane. This
+ * is done so that we don't end up touching cursor
+ * watermarks needlessly when some other plane reduces
+ * our max possible watermark level.
+ *
+ * Bspec has this to say about the PLANE_WM enable bit:
+ * "All the watermarks at this level for all enabled
+ * planes must be enabled before the level will be used."
+ * So this is actually safe to do.
+ */
+static void
+skl_check_wm_level(struct skl_wm_level *wm, const struct skl_ddb_entry *ddb)
+{
+ if (wm->min_ddb_alloc > skl_ddb_entry_size(ddb))
+ memset(wm, 0, sizeof(*wm));
+}
+
+static void
+skl_check_nv12_wm_level(struct skl_wm_level *wm, struct skl_wm_level *uv_wm,
+ const struct skl_ddb_entry *ddb_y, const struct skl_ddb_entry *ddb)
+{
+ if (wm->min_ddb_alloc > skl_ddb_entry_size(ddb_y) ||
+ uv_wm->min_ddb_alloc > skl_ddb_entry_size(ddb)) {
+ memset(wm, 0, sizeof(*wm));
+ memset(uv_wm, 0, sizeof(*uv_wm));
+ }
+}
+
+static bool icl_need_wm1_wa(struct drm_i915_private *i915,
+ enum plane_id plane_id)
+{
+ /*
+ * Wa_1408961008:icl, ehl
+ * Wa_14012656716:tgl, adl
+ * Underruns with WM1+ disabled
+ */
+ return DISPLAY_VER(i915) == 11 ||
+ (IS_DISPLAY_VER(i915, 12, 13) && plane_id == PLANE_CURSOR);
+}
+
+struct skl_plane_ddb_iter {
+ u64 data_rate;
+ u16 start, size;
+};
+
+static void
+skl_allocate_plane_ddb(struct skl_plane_ddb_iter *iter,
+ struct skl_ddb_entry *ddb,
+ const struct skl_wm_level *wm,
+ u64 data_rate)
+{
+ u16 size, extra = 0;
+
+ if (data_rate) {
+ extra = min_t(u16, iter->size,
+ DIV64_U64_ROUND_UP(iter->size * data_rate,
+ iter->data_rate));
+ iter->size -= extra;
+ iter->data_rate -= data_rate;
+ }
+
+ /*
+ * Keep ddb entry of all disabled planes explicitly zeroed
+ * to avoid skl_ddb_add_affected_planes() adding them to
+ * the state when other planes change their allocations.
+ */
+ size = wm->min_ddb_alloc + extra;
+ if (size)
+ iter->start = skl_ddb_entry_init(ddb, iter->start,
+ iter->start + size);
+}
+
+static int
+skl_crtc_allocate_plane_ddb(struct intel_atomic_state *state,
+ struct intel_crtc *crtc)
+{
+ struct drm_i915_private *i915 = to_i915(crtc->base.dev);
+ struct intel_crtc_state *crtc_state =
+ intel_atomic_get_new_crtc_state(state, crtc);
+ const struct intel_dbuf_state *dbuf_state =
+ intel_atomic_get_new_dbuf_state(state);
+ const struct skl_ddb_entry *alloc = &dbuf_state->ddb[crtc->pipe];
+ int num_active = hweight8(dbuf_state->active_pipes);
+ struct skl_plane_ddb_iter iter;
+ enum plane_id plane_id;
+ u16 cursor_size;
+ u32 blocks;
+ int level;
+
+ /* Clear the partitioning for disabled planes. */
+ memset(crtc_state->wm.skl.plane_ddb, 0, sizeof(crtc_state->wm.skl.plane_ddb));
+ memset(crtc_state->wm.skl.plane_ddb_y, 0, sizeof(crtc_state->wm.skl.plane_ddb_y));
+
+ if (!crtc_state->hw.active)
+ return 0;
+
+ iter.start = alloc->start;
+ iter.size = skl_ddb_entry_size(alloc);
+ if (iter.size == 0)
+ return 0;
+
+ /* Allocate fixed number of blocks for cursor. */
+ cursor_size = skl_cursor_allocation(crtc_state, num_active);
+ iter.size -= cursor_size;
+ skl_ddb_entry_init(&crtc_state->wm.skl.plane_ddb[PLANE_CURSOR],
+ alloc->end - cursor_size, alloc->end);
+
+ iter.data_rate = skl_total_relative_data_rate(crtc_state);
+
+ /*
+ * Find the highest watermark level for which we can satisfy the block
+ * requirement of active planes.
+ */
+ for (level = ilk_wm_max_level(i915); level >= 0; level--) {
+ blocks = 0;
+ for_each_plane_id_on_crtc(crtc, plane_id) {
+ const struct skl_plane_wm *wm =
+ &crtc_state->wm.skl.optimal.planes[plane_id];
+
+ if (plane_id == PLANE_CURSOR) {
+ const struct skl_ddb_entry *ddb =
+ &crtc_state->wm.skl.plane_ddb[plane_id];
+
+ if (wm->wm[level].min_ddb_alloc > skl_ddb_entry_size(ddb)) {
+ drm_WARN_ON(&i915->drm,
+ wm->wm[level].min_ddb_alloc != U16_MAX);
+ blocks = U32_MAX;
+ break;
+ }
+ continue;
+ }
+
+ blocks += wm->wm[level].min_ddb_alloc;
+ blocks += wm->uv_wm[level].min_ddb_alloc;
+ }
+
+ if (blocks <= iter.size) {
+ iter.size -= blocks;
+ break;
+ }
+ }
+
+ if (level < 0) {
+ drm_dbg_kms(&i915->drm,
+ "Requested display configuration exceeds system DDB limitations");
+ drm_dbg_kms(&i915->drm, "minimum required %d/%d\n",
+ blocks, iter.size);
+ return -EINVAL;
+ }
+
+ /* avoid the WARN later when we don't allocate any extra DDB */
+ if (iter.data_rate == 0)
+ iter.size = 0;
+
+ /*
+ * Grant each plane the blocks it requires at the highest achievable
+ * watermark level, plus an extra share of the leftover blocks
+ * proportional to its relative data rate.
+ */
+ for_each_plane_id_on_crtc(crtc, plane_id) {
+ struct skl_ddb_entry *ddb =
+ &crtc_state->wm.skl.plane_ddb[plane_id];
+ struct skl_ddb_entry *ddb_y =
+ &crtc_state->wm.skl.plane_ddb_y[plane_id];
+ const struct skl_plane_wm *wm =
+ &crtc_state->wm.skl.optimal.planes[plane_id];
+
+ if (plane_id == PLANE_CURSOR)
+ continue;
+
+ if (DISPLAY_VER(i915) < 11 &&
+ crtc_state->nv12_planes & BIT(plane_id)) {
+ skl_allocate_plane_ddb(&iter, ddb_y, &wm->wm[level],
+ crtc_state->rel_data_rate_y[plane_id]);
+ skl_allocate_plane_ddb(&iter, ddb, &wm->uv_wm[level],
+ crtc_state->rel_data_rate[plane_id]);
+ } else {
+ skl_allocate_plane_ddb(&iter, ddb, &wm->wm[level],
+ crtc_state->rel_data_rate[plane_id]);
+ }
+ }
+ drm_WARN_ON(&i915->drm, iter.size != 0 || iter.data_rate != 0);
+
+ /*
+ * When we calculated watermark values we didn't know how high
+ * of a level we'd actually be able to hit, so we just marked
+ * all levels as "enabled." Go back now and disable the ones
+ * that aren't actually possible.
+ */
+ for (level++; level <= ilk_wm_max_level(i915); level++) {
+ for_each_plane_id_on_crtc(crtc, plane_id) {
+ const struct skl_ddb_entry *ddb =
+ &crtc_state->wm.skl.plane_ddb[plane_id];
+ const struct skl_ddb_entry *ddb_y =
+ &crtc_state->wm.skl.plane_ddb_y[plane_id];
+ struct skl_plane_wm *wm =
+ &crtc_state->wm.skl.optimal.planes[plane_id];
+
+ if (DISPLAY_VER(i915) < 11 &&
+ crtc_state->nv12_planes & BIT(plane_id))
+ skl_check_nv12_wm_level(&wm->wm[level],
+ &wm->uv_wm[level],
+ ddb_y, ddb);
+ else
+ skl_check_wm_level(&wm->wm[level], ddb);
+
+ if (icl_need_wm1_wa(i915, plane_id) &&
+ level == 1 && wm->wm[0].enable) {
+ wm->wm[level].blocks = wm->wm[0].blocks;
+ wm->wm[level].lines = wm->wm[0].lines;
+ wm->wm[level].ignore_lines = wm->wm[0].ignore_lines;
+ }
+ }
+ }
+
+ /*
+ * Go back and disable the transition and SAGV watermarks
+ * if it turns out we don't have enough DDB blocks for them.
+ */
+ for_each_plane_id_on_crtc(crtc, plane_id) {
+ const struct skl_ddb_entry *ddb =
+ &crtc_state->wm.skl.plane_ddb[plane_id];
+ const struct skl_ddb_entry *ddb_y =
+ &crtc_state->wm.skl.plane_ddb_y[plane_id];
+ struct skl_plane_wm *wm =
+ &crtc_state->wm.skl.optimal.planes[plane_id];
+
+ if (DISPLAY_VER(i915) < 11 &&
+ crtc_state->nv12_planes & BIT(plane_id)) {
+ skl_check_wm_level(&wm->trans_wm, ddb_y);
+ } else {
+ WARN_ON(skl_ddb_entry_size(ddb_y));
+
+ skl_check_wm_level(&wm->trans_wm, ddb);
+ }
+
+ skl_check_wm_level(&wm->sagv.wm0, ddb);
+ skl_check_wm_level(&wm->sagv.trans_wm, ddb);
+ }
+
+ return 0;
+}
+
+/*
+ * The max latency should be 257 (max the punit can code is 255 and we add 2us
+ * for the read latency) and cpp should always be <= 8, so that
+ * should allow pixel_rate up to ~2 GHz which seems sufficient since max
+ * 2xcdclk is 1350 MHz and the pixel rate should never exceed that.
+ */
+static uint_fixed_16_16_t
+skl_wm_method1(const struct drm_i915_private *i915, u32 pixel_rate,
+ u8 cpp, u32 latency, u32 dbuf_block_size)
+{
+ u32 wm_intermediate_val;
+ uint_fixed_16_16_t ret;
+
+ if (latency == 0)
+ return FP_16_16_MAX;
+
+ wm_intermediate_val = latency * pixel_rate * cpp;
+ ret = div_fixed16(wm_intermediate_val, 1000 * dbuf_block_size);
+
+ if (DISPLAY_VER(i915) >= 10)
+ ret = add_fixed16_u32(ret, 1);
+
+ return ret;
+}
+
+static uint_fixed_16_16_t
+skl_wm_method2(u32 pixel_rate, u32 pipe_htotal, u32 latency,
+ uint_fixed_16_16_t plane_blocks_per_line)
+{
+ u32 wm_intermediate_val;
+ uint_fixed_16_16_t ret;
+
+ if (latency == 0)
+ return FP_16_16_MAX;
+
+ wm_intermediate_val = latency * pixel_rate;
+ wm_intermediate_val = DIV_ROUND_UP(wm_intermediate_val,
+ pipe_htotal * 1000);
+ ret = mul_u32_fixed16(wm_intermediate_val, plane_blocks_per_line);
+ return ret;
+}
+
+static uint_fixed_16_16_t
+intel_get_linetime_us(const struct intel_crtc_state *crtc_state)
+{
+ struct drm_i915_private *i915 = to_i915(crtc_state->uapi.crtc->dev);
+ u32 pixel_rate;
+ u32 crtc_htotal;
+ uint_fixed_16_16_t linetime_us;
+
+ if (!crtc_state->hw.active)
+ return u32_to_fixed16(0);
+
+ pixel_rate = crtc_state->pixel_rate;
+
+ if (drm_WARN_ON(&i915->drm, pixel_rate == 0))
+ return u32_to_fixed16(0);
+
+ crtc_htotal = crtc_state->hw.pipe_mode.crtc_htotal;
+ linetime_us = div_fixed16(crtc_htotal * 1000, pixel_rate);
+
+ return linetime_us;
+}
+
+static int
+skl_compute_wm_params(const struct intel_crtc_state *crtc_state,
+ int width, const struct drm_format_info *format,
+ u64 modifier, unsigned int rotation,
+ u32 plane_pixel_rate, struct skl_wm_params *wp,
+ int color_plane)
+{
+ struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
+ struct drm_i915_private *i915 = to_i915(crtc->base.dev);
+ u32 interm_pbpl;
+
+ /* only planar format has two planes */
+ if (color_plane == 1 &&
+ !intel_format_info_is_yuv_semiplanar(format, modifier)) {
+ drm_dbg_kms(&i915->drm,
+ "Non planar format have single plane\n");
+ return -EINVAL;
+ }
+
+ wp->y_tiled = modifier == I915_FORMAT_MOD_Y_TILED ||
+ modifier == I915_FORMAT_MOD_4_TILED ||
+ modifier == I915_FORMAT_MOD_Yf_TILED ||
+ modifier == I915_FORMAT_MOD_Y_TILED_CCS ||
+ modifier == I915_FORMAT_MOD_Yf_TILED_CCS;
+ wp->x_tiled = modifier == I915_FORMAT_MOD_X_TILED;
+ wp->rc_surface = modifier == I915_FORMAT_MOD_Y_TILED_CCS ||
+ modifier == I915_FORMAT_MOD_Yf_TILED_CCS;
+ wp->is_planar = intel_format_info_is_yuv_semiplanar(format, modifier);
+
+ wp->width = width;
+ if (color_plane == 1 && wp->is_planar)
+ wp->width /= 2;
+
+ wp->cpp = format->cpp[color_plane];
+ wp->plane_pixel_rate = plane_pixel_rate;
+
+ if (DISPLAY_VER(i915) >= 11 &&
+ modifier == I915_FORMAT_MOD_Yf_TILED && wp->cpp == 1)
+ wp->dbuf_block_size = 256;
+ else
+ wp->dbuf_block_size = 512;
+
+ if (drm_rotation_90_or_270(rotation)) {
+ switch (wp->cpp) {
+ case 1:
+ wp->y_min_scanlines = 16;
+ break;
+ case 2:
+ wp->y_min_scanlines = 8;
+ break;
+ case 4:
+ wp->y_min_scanlines = 4;
+ break;
+ default:
+ MISSING_CASE(wp->cpp);
+ return -EINVAL;
+ }
+ } else {
+ wp->y_min_scanlines = 4;
+ }
+
+ if (skl_needs_memory_bw_wa(i915))
+ wp->y_min_scanlines *= 2;
+
+ wp->plane_bytes_per_line = wp->width * wp->cpp;
+ if (wp->y_tiled) {
+ interm_pbpl = DIV_ROUND_UP(wp->plane_bytes_per_line *
+ wp->y_min_scanlines,
+ wp->dbuf_block_size);
+
+ if (DISPLAY_VER(i915) >= 10)
+ interm_pbpl++;
+
+ wp->plane_blocks_per_line = div_fixed16(interm_pbpl,
+ wp->y_min_scanlines);
+ } else {
+ interm_pbpl = DIV_ROUND_UP(wp->plane_bytes_per_line,
+ wp->dbuf_block_size);
+
+ if (!wp->x_tiled || DISPLAY_VER(i915) >= 10)
+ interm_pbpl++;
+
+ wp->plane_blocks_per_line = u32_to_fixed16(interm_pbpl);
+ }
+
+ wp->y_tile_minimum = mul_u32_fixed16(wp->y_min_scanlines,
+ wp->plane_blocks_per_line);
+
+ wp->linetime_us = fixed16_to_u32_round_up(intel_get_linetime_us(crtc_state));
+
+ return 0;
+}
+
+static int
+skl_compute_plane_wm_params(const struct intel_crtc_state *crtc_state,
+ const struct intel_plane_state *plane_state,
+ struct skl_wm_params *wp, int color_plane)
+{
+ const struct drm_framebuffer *fb = plane_state->hw.fb;
+ int width;
+
+ /*
+ * Src coordinates are already rotated by 270 degrees for
+ * the 90/270 degree plane rotation cases (to match the
+ * GTT mapping), hence no need to account for rotation here.
+ */
+ width = drm_rect_width(&plane_state->uapi.src) >> 16;
+
+ return skl_compute_wm_params(crtc_state, width,
+ fb->format, fb->modifier,
+ plane_state->hw.rotation,
+ intel_plane_pixel_rate(crtc_state, plane_state),
+ wp, color_plane);
+}
+
+static bool skl_wm_has_lines(struct drm_i915_private *i915, int level)
+{
+ if (DISPLAY_VER(i915) >= 10)
+ return true;
+
+ /* The number of lines are ignored for the level 0 watermark. */
+ return level > 0;
+}
+
+static int skl_wm_max_lines(struct drm_i915_private *i915)
+{
+ if (DISPLAY_VER(i915) >= 13)
+ return 255;
+ else
+ return 31;
+}
+
+static void skl_compute_plane_wm(const struct intel_crtc_state *crtc_state,
+ struct intel_plane *plane,
+ int level,
+ unsigned int latency,
+ const struct skl_wm_params *wp,
+ const struct skl_wm_level *result_prev,
+ struct skl_wm_level *result /* out */)
+{
+ struct drm_i915_private *i915 = to_i915(crtc_state->uapi.crtc->dev);
+ uint_fixed_16_16_t method1, method2;
+ uint_fixed_16_16_t selected_result;
+ u32 blocks, lines, min_ddb_alloc = 0;
+
+ if (latency == 0 ||
+ (use_minimal_wm0_only(crtc_state, plane) && level > 0)) {
+ /* reject it */
+ result->min_ddb_alloc = U16_MAX;
+ return;
+ }
+
+ /*
+ * WaIncreaseLatencyIPCEnabled: kbl,cfl
+ * Display WA #1141: kbl,cfl
+ */
+ if ((IS_KABYLAKE(i915) ||
+ IS_COFFEELAKE(i915) ||
+ IS_COMETLAKE(i915)) &&
+ i915->ipc_enabled)
+ latency += 4;
+
+ if (skl_needs_memory_bw_wa(i915) && wp->x_tiled)
+ latency += 15;
+
+ method1 = skl_wm_method1(i915, wp->plane_pixel_rate,
+ wp->cpp, latency, wp->dbuf_block_size);
+ method2 = skl_wm_method2(wp->plane_pixel_rate,
+ crtc_state->hw.pipe_mode.crtc_htotal,
+ latency,
+ wp->plane_blocks_per_line);
+
+ if (wp->y_tiled) {
+ selected_result = max_fixed16(method2, wp->y_tile_minimum);
+ } else {
+ if ((wp->cpp * crtc_state->hw.pipe_mode.crtc_htotal /
+ wp->dbuf_block_size < 1) &&
+ (wp->plane_bytes_per_line / wp->dbuf_block_size < 1)) {
+ selected_result = method2;
+ } else if (latency >= wp->linetime_us) {
+ if (DISPLAY_VER(i915) == 9)
+ selected_result = min_fixed16(method1, method2);
+ else
+ selected_result = method2;
+ } else {
+ selected_result = method1;
+ }
+ }
+
+ blocks = fixed16_to_u32_round_up(selected_result) + 1;
+ /*
+ * Lets have blocks at minimum equivalent to plane_blocks_per_line
+ * as there will be at minimum one line for lines configuration. This
+ * is a work around for FIFO underruns observed with resolutions like
+ * 4k 60 Hz in single channel DRAM configurations.
+ *
+ * As per the Bspec 49325, if the ddb allocation can hold at least
+ * one plane_blocks_per_line, we should have selected method2 in
+ * the above logic. Assuming that modern versions have enough dbuf
+ * and method2 guarantees blocks equivalent to at least 1 line,
+ * select the blocks as plane_blocks_per_line.
+ *
+ * TODO: Revisit the logic when we have better understanding on DRAM
+ * channels' impact on the level 0 memory latency and the relevant
+ * wm calculations.
+ */
+ if (skl_wm_has_lines(i915, level))
+ blocks = max(blocks,
+ fixed16_to_u32_round_up(wp->plane_blocks_per_line));
+ lines = div_round_up_fixed16(selected_result,
+ wp->plane_blocks_per_line);
+
+ if (DISPLAY_VER(i915) == 9) {
+ /* Display WA #1125: skl,bxt,kbl */
+ if (level == 0 && wp->rc_surface)
+ blocks += fixed16_to_u32_round_up(wp->y_tile_minimum);
+
+ /* Display WA #1126: skl,bxt,kbl */
+ if (level >= 1 && level <= 7) {
+ if (wp->y_tiled) {
+ blocks += fixed16_to_u32_round_up(wp->y_tile_minimum);
+ lines += wp->y_min_scanlines;
+ } else {
+ blocks++;
+ }
+
+ /*
+ * Make sure result blocks for higher latency levels are
+ * at least as high as level below the current level.
+ * Assumption in DDB algorithm optimization for special
+ * cases. Also covers Display WA #1125 for RC.
+ */
+ if (result_prev->blocks > blocks)
+ blocks = result_prev->blocks;
+ }
+ }
+
+ if (DISPLAY_VER(i915) >= 11) {
+ if (wp->y_tiled) {
+ int extra_lines;
+
+ if (lines % wp->y_min_scanlines == 0)
+ extra_lines = wp->y_min_scanlines;
+ else
+ extra_lines = wp->y_min_scanlines * 2 -
+ lines % wp->y_min_scanlines;
+
+ min_ddb_alloc = mul_round_up_u32_fixed16(lines + extra_lines,
+ wp->plane_blocks_per_line);
+ } else {
+ min_ddb_alloc = blocks + DIV_ROUND_UP(blocks, 10);
+ }
+ }
+
+ if (!skl_wm_has_lines(i915, level))
+ lines = 0;
+
+ if (lines > skl_wm_max_lines(i915)) {
+ /* reject it */
+ result->min_ddb_alloc = U16_MAX;
+ return;
+ }
+
+ /*
+ * If lines is valid, assume we can use this watermark level
+ * for now. We'll come back and disable it after we calculate the
+ * DDB allocation if it turns out we don't actually have enough
+ * blocks to satisfy it.
+ */
+ result->blocks = blocks;
+ result->lines = lines;
+ /* Bspec says: value >= plane ddb allocation -> invalid, hence the +1 here */
+ result->min_ddb_alloc = max(min_ddb_alloc, blocks) + 1;
+ result->enable = true;
+
+ if (DISPLAY_VER(i915) < 12 && i915->display.sagv.block_time_us)
+ result->can_sagv = latency >= i915->display.sagv.block_time_us;
+}
+
+static void
+skl_compute_wm_levels(const struct intel_crtc_state *crtc_state,
+ struct intel_plane *plane,
+ const struct skl_wm_params *wm_params,
+ struct skl_wm_level *levels)
+{
+ struct drm_i915_private *i915 = to_i915(crtc_state->uapi.crtc->dev);
+ int level, max_level = ilk_wm_max_level(i915);
+ struct skl_wm_level *result_prev = &levels[0];
+
+ for (level = 0; level <= max_level; level++) {
+ struct skl_wm_level *result = &levels[level];
+ unsigned int latency = i915->display.wm.skl_latency[level];
+
+ skl_compute_plane_wm(crtc_state, plane, level, latency,
+ wm_params, result_prev, result);
+
+ result_prev = result;
+ }
+}
+
+static void tgl_compute_sagv_wm(const struct intel_crtc_state *crtc_state,
+ struct intel_plane *plane,
+ const struct skl_wm_params *wm_params,
+ struct skl_plane_wm *plane_wm)
+{
+ struct drm_i915_private *i915 = to_i915(crtc_state->uapi.crtc->dev);
+ struct skl_wm_level *sagv_wm = &plane_wm->sagv.wm0;
+ struct skl_wm_level *levels = plane_wm->wm;
+ unsigned int latency = 0;
+
+ if (i915->display.sagv.block_time_us)
+ latency = i915->display.sagv.block_time_us + i915->display.wm.skl_latency[0];
+
+ skl_compute_plane_wm(crtc_state, plane, 0, latency,
+ wm_params, &levels[0],
+ sagv_wm);
+}
+
+static void skl_compute_transition_wm(struct drm_i915_private *i915,
+ struct skl_wm_level *trans_wm,
+ const struct skl_wm_level *wm0,
+ const struct skl_wm_params *wp)
+{
+ u16 trans_min, trans_amount, trans_y_tile_min;
+ u16 wm0_blocks, trans_offset, blocks;
+
+ /* Transition WM don't make any sense if ipc is disabled */
+ if (!i915->ipc_enabled)
+ return;
+
+ /*
+ * WaDisableTWM:skl,kbl,cfl,bxt
+ * Transition WM are not recommended by HW team for GEN9
+ */
+ if (DISPLAY_VER(i915) == 9)
+ return;
+
+ if (DISPLAY_VER(i915) >= 11)
+ trans_min = 4;
+ else
+ trans_min = 14;
+
+ /* Display WA #1140: glk,cnl */
+ if (DISPLAY_VER(i915) == 10)
+ trans_amount = 0;
+ else
+ trans_amount = 10; /* This is configurable amount */
+
+ trans_offset = trans_min + trans_amount;
+
+ /*
+ * The spec asks for Selected Result Blocks for wm0 (the real value),
+ * not Result Blocks (the integer value). Pay attention to the capital
+ * letters. The value wm_l0->blocks is actually Result Blocks, but
+ * since Result Blocks is the ceiling of Selected Result Blocks plus 1,
+ * and since we later will have to get the ceiling of the sum in the
+ * transition watermarks calculation, we can just pretend Selected
+ * Result Blocks is Result Blocks minus 1 and it should work for the
+ * current platforms.
+ */
+ wm0_blocks = wm0->blocks - 1;
+
+ if (wp->y_tiled) {
+ trans_y_tile_min =
+ (u16)mul_round_up_u32_fixed16(2, wp->y_tile_minimum);
+ blocks = max(wm0_blocks, trans_y_tile_min) + trans_offset;
+ } else {
+ blocks = wm0_blocks + trans_offset;
+ }
+ blocks++;
+
+ /*
+ * Just assume we can enable the transition watermark. After
+ * computing the DDB we'll come back and disable it if that
+ * assumption turns out to be false.
+ */
+ trans_wm->blocks = blocks;
+ trans_wm->min_ddb_alloc = max_t(u16, wm0->min_ddb_alloc, blocks + 1);
+ trans_wm->enable = true;
+}
+
+static int skl_build_plane_wm_single(struct intel_crtc_state *crtc_state,
+ const struct intel_plane_state *plane_state,
+ struct intel_plane *plane, int color_plane)
+{
+ struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
+ struct drm_i915_private *i915 = to_i915(crtc->base.dev);
+ struct skl_plane_wm *wm = &crtc_state->wm.skl.raw.planes[plane->id];
+ struct skl_wm_params wm_params;
+ int ret;
+
+ ret = skl_compute_plane_wm_params(crtc_state, plane_state,
+ &wm_params, color_plane);
+ if (ret)
+ return ret;
+
+ skl_compute_wm_levels(crtc_state, plane, &wm_params, wm->wm);
+
+ skl_compute_transition_wm(i915, &wm->trans_wm,
+ &wm->wm[0], &wm_params);
+
+ if (DISPLAY_VER(i915) >= 12) {
+ tgl_compute_sagv_wm(crtc_state, plane, &wm_params, wm);
+
+ skl_compute_transition_wm(i915, &wm->sagv.trans_wm,
+ &wm->sagv.wm0, &wm_params);
+ }
+
+ return 0;
+}
+
+static int skl_build_plane_wm_uv(struct intel_crtc_state *crtc_state,
+ const struct intel_plane_state *plane_state,
+ struct intel_plane *plane)
+{
+ struct skl_plane_wm *wm = &crtc_state->wm.skl.raw.planes[plane->id];
+ struct skl_wm_params wm_params;
+ int ret;
+
+ wm->is_planar = true;
+
+ /* uv plane watermarks must also be validated for NV12/Planar */
+ ret = skl_compute_plane_wm_params(crtc_state, plane_state,
+ &wm_params, 1);
+ if (ret)
+ return ret;
+
+ skl_compute_wm_levels(crtc_state, plane, &wm_params, wm->uv_wm);
+
+ return 0;
+}
+
+static int skl_build_plane_wm(struct intel_crtc_state *crtc_state,
+ const struct intel_plane_state *plane_state)
+{
+ struct intel_plane *plane = to_intel_plane(plane_state->uapi.plane);
+ enum plane_id plane_id = plane->id;
+ struct skl_plane_wm *wm = &crtc_state->wm.skl.raw.planes[plane_id];
+ const struct drm_framebuffer *fb = plane_state->hw.fb;
+ int ret;
+
+ memset(wm, 0, sizeof(*wm));
+
+ if (!intel_wm_plane_visible(crtc_state, plane_state))
+ return 0;
+
+ ret = skl_build_plane_wm_single(crtc_state, plane_state,
+ plane, 0);
+ if (ret)
+ return ret;
+
+ if (fb->format->is_yuv && fb->format->num_planes > 1) {
+ ret = skl_build_plane_wm_uv(crtc_state, plane_state,
+ plane);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+static int icl_build_plane_wm(struct intel_crtc_state *crtc_state,
+ const struct intel_plane_state *plane_state)
+{
+ struct intel_plane *plane = to_intel_plane(plane_state->uapi.plane);
+ struct drm_i915_private *i915 = to_i915(plane->base.dev);
+ enum plane_id plane_id = plane->id;
+ struct skl_plane_wm *wm = &crtc_state->wm.skl.raw.planes[plane_id];
+ int ret;
+
+ /* Watermarks calculated in master */
+ if (plane_state->planar_slave)
+ return 0;
+
+ memset(wm, 0, sizeof(*wm));
+
+ if (plane_state->planar_linked_plane) {
+ const struct drm_framebuffer *fb = plane_state->hw.fb;
+
+ drm_WARN_ON(&i915->drm,
+ !intel_wm_plane_visible(crtc_state, plane_state));
+ drm_WARN_ON(&i915->drm, !fb->format->is_yuv ||
+ fb->format->num_planes == 1);
+
+ ret = skl_build_plane_wm_single(crtc_state, plane_state,
+ plane_state->planar_linked_plane, 0);
+ if (ret)
+ return ret;
+
+ ret = skl_build_plane_wm_single(crtc_state, plane_state,
+ plane, 1);
+ if (ret)
+ return ret;
+ } else if (intel_wm_plane_visible(crtc_state, plane_state)) {
+ ret = skl_build_plane_wm_single(crtc_state, plane_state,
+ plane, 0);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+static int skl_build_pipe_wm(struct intel_atomic_state *state,
+ struct intel_crtc *crtc)
+{
+ struct drm_i915_private *i915 = to_i915(crtc->base.dev);
+ struct intel_crtc_state *crtc_state =
+ intel_atomic_get_new_crtc_state(state, crtc);
+ const struct intel_plane_state *plane_state;
+ struct intel_plane *plane;
+ int ret, i;
+
+ for_each_new_intel_plane_in_state(state, plane, plane_state, i) {
+ /*
+ * FIXME should perhaps check {old,new}_plane_crtc->hw.crtc
+ * instead but we don't populate that correctly for NV12 Y
+ * planes so for now hack this.
+ */
+ if (plane->pipe != crtc->pipe)
+ continue;
+
+ if (DISPLAY_VER(i915) >= 11)
+ ret = icl_build_plane_wm(crtc_state, plane_state);
+ else
+ ret = skl_build_plane_wm(crtc_state, plane_state);
+ if (ret)
+ return ret;
+ }
+
+ crtc_state->wm.skl.optimal = crtc_state->wm.skl.raw;
+
+ return 0;
+}
+
+static void skl_ddb_entry_write(struct drm_i915_private *i915,
+ i915_reg_t reg,
+ const struct skl_ddb_entry *entry)
+{
+ if (entry->end)
+ intel_de_write_fw(i915, reg,
+ PLANE_BUF_END(entry->end - 1) |
+ PLANE_BUF_START(entry->start));
+ else
+ intel_de_write_fw(i915, reg, 0);
+}
+
+static void skl_write_wm_level(struct drm_i915_private *i915,
+ i915_reg_t reg,
+ const struct skl_wm_level *level)
+{
+ u32 val = 0;
+
+ if (level->enable)
+ val |= PLANE_WM_EN;
+ if (level->ignore_lines)
+ val |= PLANE_WM_IGNORE_LINES;
+ val |= REG_FIELD_PREP(PLANE_WM_BLOCKS_MASK, level->blocks);
+ val |= REG_FIELD_PREP(PLANE_WM_LINES_MASK, level->lines);
+
+ intel_de_write_fw(i915, reg, val);
+}
+
+void skl_write_plane_wm(struct intel_plane *plane,
+ const struct intel_crtc_state *crtc_state)
+{
+ struct drm_i915_private *i915 = to_i915(plane->base.dev);
+ int level, max_level = ilk_wm_max_level(i915);
+ enum plane_id plane_id = plane->id;
+ enum pipe pipe = plane->pipe;
+ const struct skl_pipe_wm *pipe_wm = &crtc_state->wm.skl.optimal;
+ const struct skl_ddb_entry *ddb =
+ &crtc_state->wm.skl.plane_ddb[plane_id];
+ const struct skl_ddb_entry *ddb_y =
+ &crtc_state->wm.skl.plane_ddb_y[plane_id];
+
+ for (level = 0; level <= max_level; level++)
+ skl_write_wm_level(i915, PLANE_WM(pipe, plane_id, level),
+ skl_plane_wm_level(pipe_wm, plane_id, level));
+
+ skl_write_wm_level(i915, PLANE_WM_TRANS(pipe, plane_id),
+ skl_plane_trans_wm(pipe_wm, plane_id));
+
+ if (HAS_HW_SAGV_WM(i915)) {
+ const struct skl_plane_wm *wm = &pipe_wm->planes[plane_id];
+
+ skl_write_wm_level(i915, PLANE_WM_SAGV(pipe, plane_id),
+ &wm->sagv.wm0);
+ skl_write_wm_level(i915, PLANE_WM_SAGV_TRANS(pipe, plane_id),
+ &wm->sagv.trans_wm);
+ }
+
+ skl_ddb_entry_write(i915,
+ PLANE_BUF_CFG(pipe, plane_id), ddb);
+
+ if (DISPLAY_VER(i915) < 11)
+ skl_ddb_entry_write(i915,
+ PLANE_NV12_BUF_CFG(pipe, plane_id), ddb_y);
+}
+
+void skl_write_cursor_wm(struct intel_plane *plane,
+ const struct intel_crtc_state *crtc_state)
+{
+ struct drm_i915_private *i915 = to_i915(plane->base.dev);
+ int level, max_level = ilk_wm_max_level(i915);
+ enum plane_id plane_id = plane->id;
+ enum pipe pipe = plane->pipe;
+ const struct skl_pipe_wm *pipe_wm = &crtc_state->wm.skl.optimal;
+ const struct skl_ddb_entry *ddb =
+ &crtc_state->wm.skl.plane_ddb[plane_id];
+
+ for (level = 0; level <= max_level; level++)
+ skl_write_wm_level(i915, CUR_WM(pipe, level),
+ skl_plane_wm_level(pipe_wm, plane_id, level));
+
+ skl_write_wm_level(i915, CUR_WM_TRANS(pipe),
+ skl_plane_trans_wm(pipe_wm, plane_id));
+
+ if (HAS_HW_SAGV_WM(i915)) {
+ const struct skl_plane_wm *wm = &pipe_wm->planes[plane_id];
+
+ skl_write_wm_level(i915, CUR_WM_SAGV(pipe),
+ &wm->sagv.wm0);
+ skl_write_wm_level(i915, CUR_WM_SAGV_TRANS(pipe),
+ &wm->sagv.trans_wm);
+ }
+
+ skl_ddb_entry_write(i915, CUR_BUF_CFG(pipe), ddb);
+}
+
+static bool skl_wm_level_equals(const struct skl_wm_level *l1,
+ const struct skl_wm_level *l2)
+{
+ return l1->enable == l2->enable &&
+ l1->ignore_lines == l2->ignore_lines &&
+ l1->lines == l2->lines &&
+ l1->blocks == l2->blocks;
+}
+
+static bool skl_plane_wm_equals(struct drm_i915_private *i915,
+ const struct skl_plane_wm *wm1,
+ const struct skl_plane_wm *wm2)
+{
+ int level, max_level = ilk_wm_max_level(i915);
+
+ for (level = 0; level <= max_level; level++) {
+ /*
+ * We don't check uv_wm as the hardware doesn't actually
+ * use it. It only gets used for calculating the required
+ * ddb allocation.
+ */
+ if (!skl_wm_level_equals(&wm1->wm[level], &wm2->wm[level]))
+ return false;
+ }
+
+ return skl_wm_level_equals(&wm1->trans_wm, &wm2->trans_wm) &&
+ skl_wm_level_equals(&wm1->sagv.wm0, &wm2->sagv.wm0) &&
+ skl_wm_level_equals(&wm1->sagv.trans_wm, &wm2->sagv.trans_wm);
+}
+
+static bool skl_ddb_entries_overlap(const struct skl_ddb_entry *a,
+ const struct skl_ddb_entry *b)
+{
+ return a->start < b->end && b->start < a->end;
+}
+
+static void skl_ddb_entry_union(struct skl_ddb_entry *a,
+ const struct skl_ddb_entry *b)
+{
+ if (a->end && b->end) {
+ a->start = min(a->start, b->start);
+ a->end = max(a->end, b->end);
+ } else if (b->end) {
+ a->start = b->start;
+ a->end = b->end;
+ }
+}
+
+bool skl_ddb_allocation_overlaps(const struct skl_ddb_entry *ddb,
+ const struct skl_ddb_entry *entries,
+ int num_entries, int ignore_idx)
+{
+ int i;
+
+ for (i = 0; i < num_entries; i++) {
+ if (i != ignore_idx &&
+ skl_ddb_entries_overlap(ddb, &entries[i]))
+ return true;
+ }
+
+ return false;
+}
+
+static int
+skl_ddb_add_affected_planes(const struct intel_crtc_state *old_crtc_state,
+ struct intel_crtc_state *new_crtc_state)
+{
+ struct intel_atomic_state *state = to_intel_atomic_state(new_crtc_state->uapi.state);
+ struct intel_crtc *crtc = to_intel_crtc(new_crtc_state->uapi.crtc);
+ struct drm_i915_private *i915 = to_i915(crtc->base.dev);
+ struct intel_plane *plane;
+
+ for_each_intel_plane_on_crtc(&i915->drm, crtc, plane) {
+ struct intel_plane_state *plane_state;
+ enum plane_id plane_id = plane->id;
+
+ if (skl_ddb_entry_equal(&old_crtc_state->wm.skl.plane_ddb[plane_id],
+ &new_crtc_state->wm.skl.plane_ddb[plane_id]) &&
+ skl_ddb_entry_equal(&old_crtc_state->wm.skl.plane_ddb_y[plane_id],
+ &new_crtc_state->wm.skl.plane_ddb_y[plane_id]))
+ continue;
+
+ plane_state = intel_atomic_get_plane_state(state, plane);
+ if (IS_ERR(plane_state))
+ return PTR_ERR(plane_state);
+
+ new_crtc_state->update_planes |= BIT(plane_id);
+ }
+
+ return 0;
+}
+
+static u8 intel_dbuf_enabled_slices(const struct intel_dbuf_state *dbuf_state)
+{
+ struct drm_i915_private *i915 = to_i915(dbuf_state->base.state->base.dev);
+ u8 enabled_slices;
+ enum pipe pipe;
+
+ /*
+ * FIXME: For now we always enable slice S1 as per
+ * the Bspec display initialization sequence.
+ */
+ enabled_slices = BIT(DBUF_S1);
+
+ for_each_pipe(i915, pipe)
+ enabled_slices |= dbuf_state->slices[pipe];
+
+ return enabled_slices;
+}
+
+static int
+skl_compute_ddb(struct intel_atomic_state *state)
+{
+ struct drm_i915_private *i915 = to_i915(state->base.dev);
+ const struct intel_dbuf_state *old_dbuf_state;
+ struct intel_dbuf_state *new_dbuf_state = NULL;
+ const struct intel_crtc_state *old_crtc_state;
+ struct intel_crtc_state *new_crtc_state;
+ struct intel_crtc *crtc;
+ int ret, i;
+
+ for_each_new_intel_crtc_in_state(state, crtc, new_crtc_state, i) {
+ new_dbuf_state = intel_atomic_get_dbuf_state(state);
+ if (IS_ERR(new_dbuf_state))
+ return PTR_ERR(new_dbuf_state);
+
+ old_dbuf_state = intel_atomic_get_old_dbuf_state(state);
+ break;
+ }
+
+ if (!new_dbuf_state)
+ return 0;
+
+ new_dbuf_state->active_pipes =
+ intel_calc_active_pipes(state, old_dbuf_state->active_pipes);
+
+ if (old_dbuf_state->active_pipes != new_dbuf_state->active_pipes) {
+ ret = intel_atomic_lock_global_state(&new_dbuf_state->base);
+ if (ret)
+ return ret;
+ }
+
+ if (HAS_MBUS_JOINING(i915))
+ new_dbuf_state->joined_mbus =
+ adlp_check_mbus_joined(new_dbuf_state->active_pipes);
+
+ for_each_intel_crtc(&i915->drm, crtc) {
+ enum pipe pipe = crtc->pipe;
+
+ new_dbuf_state->slices[pipe] =
+ skl_compute_dbuf_slices(crtc, new_dbuf_state->active_pipes,
+ new_dbuf_state->joined_mbus);
+
+ if (old_dbuf_state->slices[pipe] == new_dbuf_state->slices[pipe])
+ continue;
+
+ ret = intel_atomic_lock_global_state(&new_dbuf_state->base);
+ if (ret)
+ return ret;
+ }
+
+ new_dbuf_state->enabled_slices = intel_dbuf_enabled_slices(new_dbuf_state);
+
+ if (old_dbuf_state->enabled_slices != new_dbuf_state->enabled_slices ||
+ old_dbuf_state->joined_mbus != new_dbuf_state->joined_mbus) {
+ ret = intel_atomic_serialize_global_state(&new_dbuf_state->base);
+ if (ret)
+ return ret;
+
+ if (old_dbuf_state->joined_mbus != new_dbuf_state->joined_mbus) {
+ /* TODO: Implement vblank synchronized MBUS joining changes */
+ ret = intel_modeset_all_pipes(state);
+ if (ret)
+ return ret;
+ }
+
+ drm_dbg_kms(&i915->drm,
+ "Enabled dbuf slices 0x%x -> 0x%x (total dbuf slices 0x%x), mbus joined? %s->%s\n",
+ old_dbuf_state->enabled_slices,
+ new_dbuf_state->enabled_slices,
+ INTEL_INFO(i915)->display.dbuf.slice_mask,
+ str_yes_no(old_dbuf_state->joined_mbus),
+ str_yes_no(new_dbuf_state->joined_mbus));
+ }
+
+ for_each_new_intel_crtc_in_state(state, crtc, new_crtc_state, i) {
+ enum pipe pipe = crtc->pipe;
+
+ new_dbuf_state->weight[pipe] = intel_crtc_ddb_weight(new_crtc_state);
+
+ if (old_dbuf_state->weight[pipe] == new_dbuf_state->weight[pipe])
+ continue;
+
+ ret = intel_atomic_lock_global_state(&new_dbuf_state->base);
+ if (ret)
+ return ret;
+ }
+
+ for_each_intel_crtc(&i915->drm, crtc) {
+ ret = skl_crtc_allocate_ddb(state, crtc);
+ if (ret)
+ return ret;
+ }
+
+ for_each_oldnew_intel_crtc_in_state(state, crtc, old_crtc_state,
+ new_crtc_state, i) {
+ ret = skl_crtc_allocate_plane_ddb(state, crtc);
+ if (ret)
+ return ret;
+
+ ret = skl_ddb_add_affected_planes(old_crtc_state,
+ new_crtc_state);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+static char enast(bool enable)
+{
+ return enable ? '*' : ' ';
+}
+
+static void
+skl_print_wm_changes(struct intel_atomic_state *state)
+{
+ struct drm_i915_private *i915 = to_i915(state->base.dev);
+ const struct intel_crtc_state *old_crtc_state;
+ const struct intel_crtc_state *new_crtc_state;
+ struct intel_plane *plane;
+ struct intel_crtc *crtc;
+ int i;
+
+ if (!drm_debug_enabled(DRM_UT_KMS))
+ return;
+
+ for_each_oldnew_intel_crtc_in_state(state, crtc, old_crtc_state,
+ new_crtc_state, i) {
+ const struct skl_pipe_wm *old_pipe_wm, *new_pipe_wm;
+
+ old_pipe_wm = &old_crtc_state->wm.skl.optimal;
+ new_pipe_wm = &new_crtc_state->wm.skl.optimal;
+
+ for_each_intel_plane_on_crtc(&i915->drm, crtc, plane) {
+ enum plane_id plane_id = plane->id;
+ const struct skl_ddb_entry *old, *new;
+
+ old = &old_crtc_state->wm.skl.plane_ddb[plane_id];
+ new = &new_crtc_state->wm.skl.plane_ddb[plane_id];
+
+ if (skl_ddb_entry_equal(old, new))
+ continue;
+
+ drm_dbg_kms(&i915->drm,
+ "[PLANE:%d:%s] ddb (%4d - %4d) -> (%4d - %4d), size %4d -> %4d\n",
+ plane->base.base.id, plane->base.name,
+ old->start, old->end, new->start, new->end,
+ skl_ddb_entry_size(old), skl_ddb_entry_size(new));
+ }
+
+ for_each_intel_plane_on_crtc(&i915->drm, crtc, plane) {
+ enum plane_id plane_id = plane->id;
+ const struct skl_plane_wm *old_wm, *new_wm;
+
+ old_wm = &old_pipe_wm->planes[plane_id];
+ new_wm = &new_pipe_wm->planes[plane_id];
+
+ if (skl_plane_wm_equals(i915, old_wm, new_wm))
+ continue;
+
+ drm_dbg_kms(&i915->drm,
+ "[PLANE:%d:%s] level %cwm0,%cwm1,%cwm2,%cwm3,%cwm4,%cwm5,%cwm6,%cwm7,%ctwm,%cswm,%cstwm"
+ " -> %cwm0,%cwm1,%cwm2,%cwm3,%cwm4,%cwm5,%cwm6,%cwm7,%ctwm,%cswm,%cstwm\n",
+ plane->base.base.id, plane->base.name,
+ enast(old_wm->wm[0].enable), enast(old_wm->wm[1].enable),
+ enast(old_wm->wm[2].enable), enast(old_wm->wm[3].enable),
+ enast(old_wm->wm[4].enable), enast(old_wm->wm[5].enable),
+ enast(old_wm->wm[6].enable), enast(old_wm->wm[7].enable),
+ enast(old_wm->trans_wm.enable),
+ enast(old_wm->sagv.wm0.enable),
+ enast(old_wm->sagv.trans_wm.enable),
+ enast(new_wm->wm[0].enable), enast(new_wm->wm[1].enable),
+ enast(new_wm->wm[2].enable), enast(new_wm->wm[3].enable),
+ enast(new_wm->wm[4].enable), enast(new_wm->wm[5].enable),
+ enast(new_wm->wm[6].enable), enast(new_wm->wm[7].enable),
+ enast(new_wm->trans_wm.enable),
+ enast(new_wm->sagv.wm0.enable),
+ enast(new_wm->sagv.trans_wm.enable));
+
+ drm_dbg_kms(&i915->drm,
+ "[PLANE:%d:%s] lines %c%3d,%c%3d,%c%3d,%c%3d,%c%3d,%c%3d,%c%3d,%c%3d,%c%3d,%c%3d,%c%4d"
+ " -> %c%3d,%c%3d,%c%3d,%c%3d,%c%3d,%c%3d,%c%3d,%c%3d,%c%3d,%c%3d,%c%4d\n",
+ plane->base.base.id, plane->base.name,
+ enast(old_wm->wm[0].ignore_lines), old_wm->wm[0].lines,
+ enast(old_wm->wm[1].ignore_lines), old_wm->wm[1].lines,
+ enast(old_wm->wm[2].ignore_lines), old_wm->wm[2].lines,
+ enast(old_wm->wm[3].ignore_lines), old_wm->wm[3].lines,
+ enast(old_wm->wm[4].ignore_lines), old_wm->wm[4].lines,
+ enast(old_wm->wm[5].ignore_lines), old_wm->wm[5].lines,
+ enast(old_wm->wm[6].ignore_lines), old_wm->wm[6].lines,
+ enast(old_wm->wm[7].ignore_lines), old_wm->wm[7].lines,
+ enast(old_wm->trans_wm.ignore_lines), old_wm->trans_wm.lines,
+ enast(old_wm->sagv.wm0.ignore_lines), old_wm->sagv.wm0.lines,
+ enast(old_wm->sagv.trans_wm.ignore_lines), old_wm->sagv.trans_wm.lines,
+ enast(new_wm->wm[0].ignore_lines), new_wm->wm[0].lines,
+ enast(new_wm->wm[1].ignore_lines), new_wm->wm[1].lines,
+ enast(new_wm->wm[2].ignore_lines), new_wm->wm[2].lines,
+ enast(new_wm->wm[3].ignore_lines), new_wm->wm[3].lines,
+ enast(new_wm->wm[4].ignore_lines), new_wm->wm[4].lines,
+ enast(new_wm->wm[5].ignore_lines), new_wm->wm[5].lines,
+ enast(new_wm->wm[6].ignore_lines), new_wm->wm[6].lines,
+ enast(new_wm->wm[7].ignore_lines), new_wm->wm[7].lines,
+ enast(new_wm->trans_wm.ignore_lines), new_wm->trans_wm.lines,
+ enast(new_wm->sagv.wm0.ignore_lines), new_wm->sagv.wm0.lines,
+ enast(new_wm->sagv.trans_wm.ignore_lines), new_wm->sagv.trans_wm.lines);
+
+ drm_dbg_kms(&i915->drm,
+ "[PLANE:%d:%s] blocks %4d,%4d,%4d,%4d,%4d,%4d,%4d,%4d,%4d,%4d,%5d"
+ " -> %4d,%4d,%4d,%4d,%4d,%4d,%4d,%4d,%4d,%4d,%5d\n",
+ plane->base.base.id, plane->base.name,
+ old_wm->wm[0].blocks, old_wm->wm[1].blocks,
+ old_wm->wm[2].blocks, old_wm->wm[3].blocks,
+ old_wm->wm[4].blocks, old_wm->wm[5].blocks,
+ old_wm->wm[6].blocks, old_wm->wm[7].blocks,
+ old_wm->trans_wm.blocks,
+ old_wm->sagv.wm0.blocks,
+ old_wm->sagv.trans_wm.blocks,
+ new_wm->wm[0].blocks, new_wm->wm[1].blocks,
+ new_wm->wm[2].blocks, new_wm->wm[3].blocks,
+ new_wm->wm[4].blocks, new_wm->wm[5].blocks,
+ new_wm->wm[6].blocks, new_wm->wm[7].blocks,
+ new_wm->trans_wm.blocks,
+ new_wm->sagv.wm0.blocks,
+ new_wm->sagv.trans_wm.blocks);
+
+ drm_dbg_kms(&i915->drm,
+ "[PLANE:%d:%s] min_ddb %4d,%4d,%4d,%4d,%4d,%4d,%4d,%4d,%4d,%4d,%5d"
+ " -> %4d,%4d,%4d,%4d,%4d,%4d,%4d,%4d,%4d,%4d,%5d\n",
+ plane->base.base.id, plane->base.name,
+ old_wm->wm[0].min_ddb_alloc, old_wm->wm[1].min_ddb_alloc,
+ old_wm->wm[2].min_ddb_alloc, old_wm->wm[3].min_ddb_alloc,
+ old_wm->wm[4].min_ddb_alloc, old_wm->wm[5].min_ddb_alloc,
+ old_wm->wm[6].min_ddb_alloc, old_wm->wm[7].min_ddb_alloc,
+ old_wm->trans_wm.min_ddb_alloc,
+ old_wm->sagv.wm0.min_ddb_alloc,
+ old_wm->sagv.trans_wm.min_ddb_alloc,
+ new_wm->wm[0].min_ddb_alloc, new_wm->wm[1].min_ddb_alloc,
+ new_wm->wm[2].min_ddb_alloc, new_wm->wm[3].min_ddb_alloc,
+ new_wm->wm[4].min_ddb_alloc, new_wm->wm[5].min_ddb_alloc,
+ new_wm->wm[6].min_ddb_alloc, new_wm->wm[7].min_ddb_alloc,
+ new_wm->trans_wm.min_ddb_alloc,
+ new_wm->sagv.wm0.min_ddb_alloc,
+ new_wm->sagv.trans_wm.min_ddb_alloc);
+ }
+ }
+}
+
+static bool skl_plane_selected_wm_equals(struct intel_plane *plane,
+ const struct skl_pipe_wm *old_pipe_wm,
+ const struct skl_pipe_wm *new_pipe_wm)
+{
+ struct drm_i915_private *i915 = to_i915(plane->base.dev);
+ int level, max_level = ilk_wm_max_level(i915);
+
+ for (level = 0; level <= max_level; level++) {
+ /*
+ * We don't check uv_wm as the hardware doesn't actually
+ * use it. It only gets used for calculating the required
+ * ddb allocation.
+ */
+ if (!skl_wm_level_equals(skl_plane_wm_level(old_pipe_wm, plane->id, level),
+ skl_plane_wm_level(new_pipe_wm, plane->id, level)))
+ return false;
+ }
+
+ if (HAS_HW_SAGV_WM(i915)) {
+ const struct skl_plane_wm *old_wm = &old_pipe_wm->planes[plane->id];
+ const struct skl_plane_wm *new_wm = &new_pipe_wm->planes[plane->id];
+
+ if (!skl_wm_level_equals(&old_wm->sagv.wm0, &new_wm->sagv.wm0) ||
+ !skl_wm_level_equals(&old_wm->sagv.trans_wm, &new_wm->sagv.trans_wm))
+ return false;
+ }
+
+ return skl_wm_level_equals(skl_plane_trans_wm(old_pipe_wm, plane->id),
+ skl_plane_trans_wm(new_pipe_wm, plane->id));
+}
+
+/*
+ * To make sure the cursor watermark registers are always consistent
+ * with our computed state the following scenario needs special
+ * treatment:
+ *
+ * 1. enable cursor
+ * 2. move cursor entirely offscreen
+ * 3. disable cursor
+ *
+ * Step 2. does call .disable_plane() but does not zero the watermarks
+ * (since we consider an offscreen cursor still active for the purposes
+ * of watermarks). Step 3. would not normally call .disable_plane()
+ * because the actual plane visibility isn't changing, and we don't
+ * deallocate the cursor ddb until the pipe gets disabled. So we must
+ * force step 3. to call .disable_plane() to update the watermark
+ * registers properly.
+ *
+ * Other planes do not suffer from this issues as their watermarks are
+ * calculated based on the actual plane visibility. The only time this
+ * can trigger for the other planes is during the initial readout as the
+ * default value of the watermarks registers is not zero.
+ */
+static int skl_wm_add_affected_planes(struct intel_atomic_state *state,
+ struct intel_crtc *crtc)
+{
+ struct drm_i915_private *i915 = to_i915(crtc->base.dev);
+ const struct intel_crtc_state *old_crtc_state =
+ intel_atomic_get_old_crtc_state(state, crtc);
+ struct intel_crtc_state *new_crtc_state =
+ intel_atomic_get_new_crtc_state(state, crtc);
+ struct intel_plane *plane;
+
+ for_each_intel_plane_on_crtc(&i915->drm, crtc, plane) {
+ struct intel_plane_state *plane_state;
+ enum plane_id plane_id = plane->id;
+
+ /*
+ * Force a full wm update for every plane on modeset.
+ * Required because the reset value of the wm registers
+ * is non-zero, whereas we want all disabled planes to
+ * have zero watermarks. So if we turn off the relevant
+ * power well the hardware state will go out of sync
+ * with the software state.
+ */
+ if (!drm_atomic_crtc_needs_modeset(&new_crtc_state->uapi) &&
+ skl_plane_selected_wm_equals(plane,
+ &old_crtc_state->wm.skl.optimal,
+ &new_crtc_state->wm.skl.optimal))
+ continue;
+
+ plane_state = intel_atomic_get_plane_state(state, plane);
+ if (IS_ERR(plane_state))
+ return PTR_ERR(plane_state);
+
+ new_crtc_state->update_planes |= BIT(plane_id);
+ }
+
+ return 0;
+}
+
+static int
+skl_compute_wm(struct intel_atomic_state *state)
+{
+ struct intel_crtc *crtc;
+ struct intel_crtc_state *new_crtc_state;
+ int ret, i;
+
+ for_each_new_intel_crtc_in_state(state, crtc, new_crtc_state, i) {
+ ret = skl_build_pipe_wm(state, crtc);
+ if (ret)
+ return ret;
+ }
+
+ ret = skl_compute_ddb(state);
+ if (ret)
+ return ret;
+
+ ret = intel_compute_sagv_mask(state);
+ if (ret)
+ return ret;
+
+ /*
+ * skl_compute_ddb() will have adjusted the final watermarks
+ * based on how much ddb is available. Now we can actually
+ * check if the final watermarks changed.
+ */
+ for_each_new_intel_crtc_in_state(state, crtc, new_crtc_state, i) {
+ ret = skl_wm_add_affected_planes(state, crtc);
+ if (ret)
+ return ret;
+ }
+
+ skl_print_wm_changes(state);
+
+ return 0;
+}
+
+static void skl_wm_level_from_reg_val(u32 val, struct skl_wm_level *level)
+{
+ level->enable = val & PLANE_WM_EN;
+ level->ignore_lines = val & PLANE_WM_IGNORE_LINES;
+ level->blocks = REG_FIELD_GET(PLANE_WM_BLOCKS_MASK, val);
+ level->lines = REG_FIELD_GET(PLANE_WM_LINES_MASK, val);
+}
+
+static void skl_pipe_wm_get_hw_state(struct intel_crtc *crtc,
+ struct skl_pipe_wm *out)
+{
+ struct drm_i915_private *i915 = to_i915(crtc->base.dev);
+ enum pipe pipe = crtc->pipe;
+ int level, max_level;
+ enum plane_id plane_id;
+ u32 val;
+
+ max_level = ilk_wm_max_level(i915);
+
+ for_each_plane_id_on_crtc(crtc, plane_id) {
+ struct skl_plane_wm *wm = &out->planes[plane_id];
+
+ for (level = 0; level <= max_level; level++) {
+ if (plane_id != PLANE_CURSOR)
+ val = intel_uncore_read(&i915->uncore, PLANE_WM(pipe, plane_id, level));
+ else
+ val = intel_uncore_read(&i915->uncore, CUR_WM(pipe, level));
+
+ skl_wm_level_from_reg_val(val, &wm->wm[level]);
+ }
+
+ if (plane_id != PLANE_CURSOR)
+ val = intel_uncore_read(&i915->uncore, PLANE_WM_TRANS(pipe, plane_id));
+ else
+ val = intel_uncore_read(&i915->uncore, CUR_WM_TRANS(pipe));
+
+ skl_wm_level_from_reg_val(val, &wm->trans_wm);
+
+ if (HAS_HW_SAGV_WM(i915)) {
+ if (plane_id != PLANE_CURSOR)
+ val = intel_uncore_read(&i915->uncore,
+ PLANE_WM_SAGV(pipe, plane_id));
+ else
+ val = intel_uncore_read(&i915->uncore,
+ CUR_WM_SAGV(pipe));
+
+ skl_wm_level_from_reg_val(val, &wm->sagv.wm0);
+
+ if (plane_id != PLANE_CURSOR)
+ val = intel_uncore_read(&i915->uncore,
+ PLANE_WM_SAGV_TRANS(pipe, plane_id));
+ else
+ val = intel_uncore_read(&i915->uncore,
+ CUR_WM_SAGV_TRANS(pipe));
+
+ skl_wm_level_from_reg_val(val, &wm->sagv.trans_wm);
+ } else if (DISPLAY_VER(i915) >= 12) {
+ wm->sagv.wm0 = wm->wm[0];
+ wm->sagv.trans_wm = wm->trans_wm;
+ }
+ }
+}
+
+void skl_wm_get_hw_state(struct drm_i915_private *i915)
+{
+ struct intel_dbuf_state *dbuf_state =
+ to_intel_dbuf_state(i915->display.dbuf.obj.state);
+ struct intel_crtc *crtc;
+
+ if (HAS_MBUS_JOINING(i915))
+ dbuf_state->joined_mbus = intel_de_read(i915, MBUS_CTL) & MBUS_JOIN;
+
+ for_each_intel_crtc(&i915->drm, crtc) {
+ struct intel_crtc_state *crtc_state =
+ to_intel_crtc_state(crtc->base.state);
+ enum pipe pipe = crtc->pipe;
+ unsigned int mbus_offset;
+ enum plane_id plane_id;
+ u8 slices;
+
+ memset(&crtc_state->wm.skl.optimal, 0,
+ sizeof(crtc_state->wm.skl.optimal));
+ if (crtc_state->hw.active)
+ skl_pipe_wm_get_hw_state(crtc, &crtc_state->wm.skl.optimal);
+ crtc_state->wm.skl.raw = crtc_state->wm.skl.optimal;
+
+ memset(&dbuf_state->ddb[pipe], 0, sizeof(dbuf_state->ddb[pipe]));
+
+ for_each_plane_id_on_crtc(crtc, plane_id) {
+ struct skl_ddb_entry *ddb =
+ &crtc_state->wm.skl.plane_ddb[plane_id];
+ struct skl_ddb_entry *ddb_y =
+ &crtc_state->wm.skl.plane_ddb_y[plane_id];
+
+ if (!crtc_state->hw.active)
+ continue;
+
+ skl_ddb_get_hw_plane_state(i915, crtc->pipe,
+ plane_id, ddb, ddb_y);
+
+ skl_ddb_entry_union(&dbuf_state->ddb[pipe], ddb);
+ skl_ddb_entry_union(&dbuf_state->ddb[pipe], ddb_y);
+ }
+
+ dbuf_state->weight[pipe] = intel_crtc_ddb_weight(crtc_state);
+
+ /*
+ * Used for checking overlaps, so we need absolute
+ * offsets instead of MBUS relative offsets.
+ */
+ slices = skl_compute_dbuf_slices(crtc, dbuf_state->active_pipes,
+ dbuf_state->joined_mbus);
+ mbus_offset = mbus_ddb_offset(i915, slices);
+ crtc_state->wm.skl.ddb.start = mbus_offset + dbuf_state->ddb[pipe].start;
+ crtc_state->wm.skl.ddb.end = mbus_offset + dbuf_state->ddb[pipe].end;
+
+ /* The slices actually used by the planes on the pipe */
+ dbuf_state->slices[pipe] =
+ skl_ddb_dbuf_slice_mask(i915, &crtc_state->wm.skl.ddb);
+
+ drm_dbg_kms(&i915->drm,
+ "[CRTC:%d:%s] dbuf slices 0x%x, ddb (%d - %d), active pipes 0x%x, mbus joined: %s\n",
+ crtc->base.base.id, crtc->base.name,
+ dbuf_state->slices[pipe], dbuf_state->ddb[pipe].start,
+ dbuf_state->ddb[pipe].end, dbuf_state->active_pipes,
+ str_yes_no(dbuf_state->joined_mbus));
+ }
+
+ dbuf_state->enabled_slices = i915->display.dbuf.enabled_slices;
+}
+
+static bool skl_dbuf_is_misconfigured(struct drm_i915_private *i915)
+{
+ const struct intel_dbuf_state *dbuf_state =
+ to_intel_dbuf_state(i915->display.dbuf.obj.state);
+ struct skl_ddb_entry entries[I915_MAX_PIPES] = {};
+ struct intel_crtc *crtc;
+
+ for_each_intel_crtc(&i915->drm, crtc) {
+ const struct intel_crtc_state *crtc_state =
+ to_intel_crtc_state(crtc->base.state);
+
+ entries[crtc->pipe] = crtc_state->wm.skl.ddb;
+ }
+
+ for_each_intel_crtc(&i915->drm, crtc) {
+ const struct intel_crtc_state *crtc_state =
+ to_intel_crtc_state(crtc->base.state);
+ u8 slices;
+
+ slices = skl_compute_dbuf_slices(crtc, dbuf_state->active_pipes,
+ dbuf_state->joined_mbus);
+ if (dbuf_state->slices[crtc->pipe] & ~slices)
+ return true;
+
+ if (skl_ddb_allocation_overlaps(&crtc_state->wm.skl.ddb, entries,
+ I915_MAX_PIPES, crtc->pipe))
+ return true;
+ }
+
+ return false;
+}
+
+void skl_wm_sanitize(struct drm_i915_private *i915)
+{
+ struct intel_crtc *crtc;
+
+ /*
+ * On TGL/RKL (at least) the BIOS likes to assign the planes
+ * to the wrong DBUF slices. This will cause an infinite loop
+ * in skl_commit_modeset_enables() as it can't find a way to
+ * transition between the old bogus DBUF layout to the new
+ * proper DBUF layout without DBUF allocation overlaps between
+ * the planes (which cannot be allowed or else the hardware
+ * may hang). If we detect a bogus DBUF layout just turn off
+ * all the planes so that skl_commit_modeset_enables() can
+ * simply ignore them.
+ */
+ if (!skl_dbuf_is_misconfigured(i915))
+ return;
+
+ drm_dbg_kms(&i915->drm, "BIOS has misprogrammed the DBUF, disabling all planes\n");
+
+ for_each_intel_crtc(&i915->drm, crtc) {
+ struct intel_plane *plane = to_intel_plane(crtc->base.primary);
+ const struct intel_plane_state *plane_state =
+ to_intel_plane_state(plane->base.state);
+ struct intel_crtc_state *crtc_state =
+ to_intel_crtc_state(crtc->base.state);
+
+ if (plane_state->uapi.visible)
+ intel_plane_disable_noatomic(crtc, plane);
+
+ drm_WARN_ON(&i915->drm, crtc_state->active_planes != 0);
+
+ memset(&crtc_state->wm.skl.ddb, 0, sizeof(crtc_state->wm.skl.ddb));
+ }
+}
+
+void intel_wm_state_verify(struct intel_crtc *crtc,
+ struct intel_crtc_state *new_crtc_state)
+{
+ struct drm_i915_private *i915 = to_i915(crtc->base.dev);
+ struct skl_hw_state {
+ struct skl_ddb_entry ddb[I915_MAX_PLANES];
+ struct skl_ddb_entry ddb_y[I915_MAX_PLANES];
+ struct skl_pipe_wm wm;
+ } *hw;
+ const struct skl_pipe_wm *sw_wm = &new_crtc_state->wm.skl.optimal;
+ int level, max_level = ilk_wm_max_level(i915);
+ struct intel_plane *plane;
+ u8 hw_enabled_slices;
+
+ if (DISPLAY_VER(i915) < 9 || !new_crtc_state->hw.active)
+ return;
+
+ hw = kzalloc(sizeof(*hw), GFP_KERNEL);
+ if (!hw)
+ return;
+
+ skl_pipe_wm_get_hw_state(crtc, &hw->wm);
+
+ skl_pipe_ddb_get_hw_state(crtc, hw->ddb, hw->ddb_y);
+
+ hw_enabled_slices = intel_enabled_dbuf_slices_mask(i915);
+
+ if (DISPLAY_VER(i915) >= 11 &&
+ hw_enabled_slices != i915->display.dbuf.enabled_slices)
+ drm_err(&i915->drm,
+ "mismatch in DBUF Slices (expected 0x%x, got 0x%x)\n",
+ i915->display.dbuf.enabled_slices,
+ hw_enabled_slices);
+
+ for_each_intel_plane_on_crtc(&i915->drm, crtc, plane) {
+ const struct skl_ddb_entry *hw_ddb_entry, *sw_ddb_entry;
+ const struct skl_wm_level *hw_wm_level, *sw_wm_level;
+
+ /* Watermarks */
+ for (level = 0; level <= max_level; level++) {
+ hw_wm_level = &hw->wm.planes[plane->id].wm[level];
+ sw_wm_level = skl_plane_wm_level(sw_wm, plane->id, level);
+
+ if (skl_wm_level_equals(hw_wm_level, sw_wm_level))
+ continue;
+
+ drm_err(&i915->drm,
+ "[PLANE:%d:%s] mismatch in WM%d (expected e=%d b=%u l=%u, got e=%d b=%u l=%u)\n",
+ plane->base.base.id, plane->base.name, level,
+ sw_wm_level->enable,
+ sw_wm_level->blocks,
+ sw_wm_level->lines,
+ hw_wm_level->enable,
+ hw_wm_level->blocks,
+ hw_wm_level->lines);
+ }
+
+ hw_wm_level = &hw->wm.planes[plane->id].trans_wm;
+ sw_wm_level = skl_plane_trans_wm(sw_wm, plane->id);
+
+ if (!skl_wm_level_equals(hw_wm_level, sw_wm_level)) {
+ drm_err(&i915->drm,
+ "[PLANE:%d:%s] mismatch in trans WM (expected e=%d b=%u l=%u, got e=%d b=%u l=%u)\n",
+ plane->base.base.id, plane->base.name,
+ sw_wm_level->enable,
+ sw_wm_level->blocks,
+ sw_wm_level->lines,
+ hw_wm_level->enable,
+ hw_wm_level->blocks,
+ hw_wm_level->lines);
+ }
+
+ hw_wm_level = &hw->wm.planes[plane->id].sagv.wm0;
+ sw_wm_level = &sw_wm->planes[plane->id].sagv.wm0;
+
+ if (HAS_HW_SAGV_WM(i915) &&
+ !skl_wm_level_equals(hw_wm_level, sw_wm_level)) {
+ drm_err(&i915->drm,
+ "[PLANE:%d:%s] mismatch in SAGV WM (expected e=%d b=%u l=%u, got e=%d b=%u l=%u)\n",
+ plane->base.base.id, plane->base.name,
+ sw_wm_level->enable,
+ sw_wm_level->blocks,
+ sw_wm_level->lines,
+ hw_wm_level->enable,
+ hw_wm_level->blocks,
+ hw_wm_level->lines);
+ }
+
+ hw_wm_level = &hw->wm.planes[plane->id].sagv.trans_wm;
+ sw_wm_level = &sw_wm->planes[plane->id].sagv.trans_wm;
+
+ if (HAS_HW_SAGV_WM(i915) &&
+ !skl_wm_level_equals(hw_wm_level, sw_wm_level)) {
+ drm_err(&i915->drm,
+ "[PLANE:%d:%s] mismatch in SAGV trans WM (expected e=%d b=%u l=%u, got e=%d b=%u l=%u)\n",
+ plane->base.base.id, plane->base.name,
+ sw_wm_level->enable,
+ sw_wm_level->blocks,
+ sw_wm_level->lines,
+ hw_wm_level->enable,
+ hw_wm_level->blocks,
+ hw_wm_level->lines);
+ }
+
+ /* DDB */
+ hw_ddb_entry = &hw->ddb[PLANE_CURSOR];
+ sw_ddb_entry = &new_crtc_state->wm.skl.plane_ddb[PLANE_CURSOR];
+
+ if (!skl_ddb_entry_equal(hw_ddb_entry, sw_ddb_entry)) {
+ drm_err(&i915->drm,
+ "[PLANE:%d:%s] mismatch in DDB (expected (%u,%u), found (%u,%u))\n",
+ plane->base.base.id, plane->base.name,
+ sw_ddb_entry->start, sw_ddb_entry->end,
+ hw_ddb_entry->start, hw_ddb_entry->end);
+ }
+ }
+
+ kfree(hw);
+}
+
+void intel_enable_ipc(struct drm_i915_private *i915)
+{
+ u32 val;
+
+ if (!HAS_IPC(i915))
+ return;
+
+ val = intel_uncore_read(&i915->uncore, DISP_ARB_CTL2);
+
+ if (i915->ipc_enabled)
+ val |= DISP_IPC_ENABLE;
+ else
+ val &= ~DISP_IPC_ENABLE;
+
+ intel_uncore_write(&i915->uncore, DISP_ARB_CTL2, val);
+}
+
+static bool intel_can_enable_ipc(struct drm_i915_private *i915)
+{
+ /* Display WA #0477 WaDisableIPC: skl */
+ if (IS_SKYLAKE(i915))
+ return false;
+
+ /* Display WA #1141: SKL:all KBL:all CFL */
+ if (IS_KABYLAKE(i915) ||
+ IS_COFFEELAKE(i915) ||
+ IS_COMETLAKE(i915))
+ return i915->dram_info.symmetric_memory;
+
+ return true;
+}
+
+void intel_init_ipc(struct drm_i915_private *i915)
+{
+ if (!HAS_IPC(i915))
+ return;
+
+ i915->ipc_enabled = intel_can_enable_ipc(i915);
+
+ intel_enable_ipc(i915);
+}
+
+static void
+adjust_wm_latency(struct drm_i915_private *i915,
+ u16 wm[], int max_level, int read_latency)
+{
+ bool wm_lv_0_adjust_needed = i915->dram_info.wm_lv_0_adjust_needed;
+ int i, level;
+
+ /*
+ * If a level n (n > 1) has a 0us latency, all levels m (m >= n)
+ * need to be disabled. We make sure to sanitize the values out
+ * of the punit to satisfy this requirement.
+ */
+ for (level = 1; level <= max_level; level++) {
+ if (wm[level] == 0) {
+ for (i = level + 1; i <= max_level; i++)
+ wm[i] = 0;
+
+ max_level = level - 1;
+ break;
+ }
+ }
+
+ /*
+ * WaWmMemoryReadLatency
+ *
+ * punit doesn't take into account the read latency so we need
+ * to add proper adjustement to each valid level we retrieve
+ * from the punit when level 0 response data is 0us.
+ */
+ if (wm[0] == 0) {
+ for (level = 0; level <= max_level; level++)
+ wm[level] += read_latency;
+ }
+
+ /*
+ * WA Level-0 adjustment for 16GB DIMMs: SKL+
+ * If we could not get dimm info enable this WA to prevent from
+ * any underrun. If not able to get Dimm info assume 16GB dimm
+ * to avoid any underrun.
+ */
+ if (wm_lv_0_adjust_needed)
+ wm[0] += 1;
+}
+
+static void mtl_read_wm_latency(struct drm_i915_private *i915, u16 wm[])
+{
+ struct intel_uncore *uncore = &i915->uncore;
+ int max_level = ilk_wm_max_level(i915);
+ u32 val;
+
+ val = intel_uncore_read(uncore, MTL_LATENCY_LP0_LP1);
+ wm[0] = REG_FIELD_GET(MTL_LATENCY_LEVEL_EVEN_MASK, val);
+ wm[1] = REG_FIELD_GET(MTL_LATENCY_LEVEL_ODD_MASK, val);
+
+ val = intel_uncore_read(uncore, MTL_LATENCY_LP2_LP3);
+ wm[2] = REG_FIELD_GET(MTL_LATENCY_LEVEL_EVEN_MASK, val);
+ wm[3] = REG_FIELD_GET(MTL_LATENCY_LEVEL_ODD_MASK, val);
+
+ val = intel_uncore_read(uncore, MTL_LATENCY_LP4_LP5);
+ wm[4] = REG_FIELD_GET(MTL_LATENCY_LEVEL_EVEN_MASK, val);
+ wm[5] = REG_FIELD_GET(MTL_LATENCY_LEVEL_ODD_MASK, val);
+
+ adjust_wm_latency(i915, wm, max_level, 6);
+}
+
+static void skl_read_wm_latency(struct drm_i915_private *i915, u16 wm[])
+{
+ int max_level = ilk_wm_max_level(i915);
+ int read_latency = DISPLAY_VER(i915) >= 12 ? 3 : 2;
+ int mult = IS_DG2(i915) ? 2 : 1;
+ u32 val;
+ int ret;
+
+ /* read the first set of memory latencies[0:3] */
+ val = 0; /* data0 to be programmed to 0 for first set */
+ ret = snb_pcode_read(&i915->uncore, GEN9_PCODE_READ_MEM_LATENCY, &val, NULL);
+ if (ret) {
+ drm_err(&i915->drm, "SKL Mailbox read error = %d\n", ret);
+ return;
+ }
+
+ wm[0] = (val & GEN9_MEM_LATENCY_LEVEL_MASK) * mult;
+ wm[1] = ((val >> GEN9_MEM_LATENCY_LEVEL_1_5_SHIFT) &
+ GEN9_MEM_LATENCY_LEVEL_MASK) * mult;
+ wm[2] = ((val >> GEN9_MEM_LATENCY_LEVEL_2_6_SHIFT) &
+ GEN9_MEM_LATENCY_LEVEL_MASK) * mult;
+ wm[3] = ((val >> GEN9_MEM_LATENCY_LEVEL_3_7_SHIFT) &
+ GEN9_MEM_LATENCY_LEVEL_MASK) * mult;
+
+ /* read the second set of memory latencies[4:7] */
+ val = 1; /* data0 to be programmed to 1 for second set */
+ ret = snb_pcode_read(&i915->uncore, GEN9_PCODE_READ_MEM_LATENCY, &val, NULL);
+ if (ret) {
+ drm_err(&i915->drm, "SKL Mailbox read error = %d\n", ret);
+ return;
+ }
+
+ wm[4] = (val & GEN9_MEM_LATENCY_LEVEL_MASK) * mult;
+ wm[5] = ((val >> GEN9_MEM_LATENCY_LEVEL_1_5_SHIFT) &
+ GEN9_MEM_LATENCY_LEVEL_MASK) * mult;
+ wm[6] = ((val >> GEN9_MEM_LATENCY_LEVEL_2_6_SHIFT) &
+ GEN9_MEM_LATENCY_LEVEL_MASK) * mult;
+ wm[7] = ((val >> GEN9_MEM_LATENCY_LEVEL_3_7_SHIFT) &
+ GEN9_MEM_LATENCY_LEVEL_MASK) * mult;
+
+ adjust_wm_latency(i915, wm, max_level, read_latency);
+}
+
+static void skl_setup_wm_latency(struct drm_i915_private *i915)
+{
+ if (DISPLAY_VER(i915) >= 14)
+ mtl_read_wm_latency(i915, i915->display.wm.skl_latency);
+ else
+ skl_read_wm_latency(i915, i915->display.wm.skl_latency);
+
+ intel_print_wm_latency(i915, "Gen9 Plane", i915->display.wm.skl_latency);
+}
+
+static const struct intel_wm_funcs skl_wm_funcs = {
+ .compute_global_watermarks = skl_compute_wm,
+};
+
+void skl_wm_init(struct drm_i915_private *i915)
+{
+ intel_sagv_init(i915);
+
+ skl_setup_wm_latency(i915);
+
+ i915->display.funcs.wm = &skl_wm_funcs;
+}
+
+static struct intel_global_state *intel_dbuf_duplicate_state(struct intel_global_obj *obj)
+{
+ struct intel_dbuf_state *dbuf_state;
+
+ dbuf_state = kmemdup(obj->state, sizeof(*dbuf_state), GFP_KERNEL);
+ if (!dbuf_state)
+ return NULL;
+
+ return &dbuf_state->base;
+}
+
+static void intel_dbuf_destroy_state(struct intel_global_obj *obj,
+ struct intel_global_state *state)
+{
+ kfree(state);
+}
+
+static const struct intel_global_state_funcs intel_dbuf_funcs = {
+ .atomic_duplicate_state = intel_dbuf_duplicate_state,
+ .atomic_destroy_state = intel_dbuf_destroy_state,
+};
+
+struct intel_dbuf_state *
+intel_atomic_get_dbuf_state(struct intel_atomic_state *state)
+{
+ struct drm_i915_private *i915 = to_i915(state->base.dev);
+ struct intel_global_state *dbuf_state;
+
+ dbuf_state = intel_atomic_get_global_obj_state(state, &i915->display.dbuf.obj);
+ if (IS_ERR(dbuf_state))
+ return ERR_CAST(dbuf_state);
+
+ return to_intel_dbuf_state(dbuf_state);
+}
+
+int intel_dbuf_init(struct drm_i915_private *i915)
+{
+ struct intel_dbuf_state *dbuf_state;
+
+ dbuf_state = kzalloc(sizeof(*dbuf_state), GFP_KERNEL);
+ if (!dbuf_state)
+ return -ENOMEM;
+
+ intel_atomic_global_obj_init(i915, &i915->display.dbuf.obj,
+ &dbuf_state->base, &intel_dbuf_funcs);
+
+ return 0;
+}
+
+/*
+ * Configure MBUS_CTL and all DBUF_CTL_S of each slice to join_mbus state before
+ * update the request state of all DBUS slices.
+ */
+static void update_mbus_pre_enable(struct intel_atomic_state *state)
+{
+ struct drm_i915_private *i915 = to_i915(state->base.dev);
+ u32 mbus_ctl, dbuf_min_tracker_val;
+ enum dbuf_slice slice;
+ const struct intel_dbuf_state *dbuf_state =
+ intel_atomic_get_new_dbuf_state(state);
+
+ if (!HAS_MBUS_JOINING(i915))
+ return;
+
+ /*
+ * TODO: Implement vblank synchronized MBUS joining changes.
+ * Must be properly coordinated with dbuf reprogramming.
+ */
+ if (dbuf_state->joined_mbus) {
+ mbus_ctl = MBUS_HASHING_MODE_1x4 | MBUS_JOIN |
+ MBUS_JOIN_PIPE_SELECT_NONE;
+ dbuf_min_tracker_val = DBUF_MIN_TRACKER_STATE_SERVICE(3);
+ } else {
+ mbus_ctl = MBUS_HASHING_MODE_2x2 |
+ MBUS_JOIN_PIPE_SELECT_NONE;
+ dbuf_min_tracker_val = DBUF_MIN_TRACKER_STATE_SERVICE(1);
+ }
+
+ intel_de_rmw(i915, MBUS_CTL,
+ MBUS_HASHING_MODE_MASK | MBUS_JOIN |
+ MBUS_JOIN_PIPE_SELECT_MASK, mbus_ctl);
+
+ for_each_dbuf_slice(i915, slice)
+ intel_de_rmw(i915, DBUF_CTL_S(slice),
+ DBUF_MIN_TRACKER_STATE_SERVICE_MASK,
+ dbuf_min_tracker_val);
+}
+
+void intel_dbuf_pre_plane_update(struct intel_atomic_state *state)
+{
+ struct drm_i915_private *i915 = to_i915(state->base.dev);
+ const struct intel_dbuf_state *new_dbuf_state =
+ intel_atomic_get_new_dbuf_state(state);
+ const struct intel_dbuf_state *old_dbuf_state =
+ intel_atomic_get_old_dbuf_state(state);
+
+ if (!new_dbuf_state ||
+ (new_dbuf_state->enabled_slices == old_dbuf_state->enabled_slices &&
+ new_dbuf_state->joined_mbus == old_dbuf_state->joined_mbus))
+ return;
+
+ WARN_ON(!new_dbuf_state->base.changed);
+
+ update_mbus_pre_enable(state);
+ gen9_dbuf_slices_update(i915,
+ old_dbuf_state->enabled_slices |
+ new_dbuf_state->enabled_slices);
+}
+
+void intel_dbuf_post_plane_update(struct intel_atomic_state *state)
+{
+ struct drm_i915_private *i915 = to_i915(state->base.dev);
+ const struct intel_dbuf_state *new_dbuf_state =
+ intel_atomic_get_new_dbuf_state(state);
+ const struct intel_dbuf_state *old_dbuf_state =
+ intel_atomic_get_old_dbuf_state(state);
+
+ if (!new_dbuf_state ||
+ (new_dbuf_state->enabled_slices == old_dbuf_state->enabled_slices &&
+ new_dbuf_state->joined_mbus == old_dbuf_state->joined_mbus))
+ return;
+
+ WARN_ON(!new_dbuf_state->base.changed);
+
+ gen9_dbuf_slices_update(i915,
+ new_dbuf_state->enabled_slices);
+}
+
+void intel_mbus_dbox_update(struct intel_atomic_state *state)
+{
+ struct drm_i915_private *i915 = to_i915(state->base.dev);
+ const struct intel_dbuf_state *new_dbuf_state, *old_dbuf_state;
+ const struct intel_crtc_state *new_crtc_state;
+ const struct intel_crtc *crtc;
+ u32 val = 0;
+ int i;
+
+ if (DISPLAY_VER(i915) < 11)
+ return;
+
+ new_dbuf_state = intel_atomic_get_new_dbuf_state(state);
+ old_dbuf_state = intel_atomic_get_old_dbuf_state(state);
+ if (!new_dbuf_state ||
+ (new_dbuf_state->joined_mbus == old_dbuf_state->joined_mbus &&
+ new_dbuf_state->active_pipes == old_dbuf_state->active_pipes))
+ return;
+
+ if (DISPLAY_VER(i915) >= 12) {
+ val |= MBUS_DBOX_B2B_TRANSACTIONS_MAX(16);
+ val |= MBUS_DBOX_B2B_TRANSACTIONS_DELAY(1);
+ val |= MBUS_DBOX_REGULATE_B2B_TRANSACTIONS_EN;
+ }
+
+ /* Wa_22010947358:adl-p */
+ if (IS_ALDERLAKE_P(i915))
+ val |= new_dbuf_state->joined_mbus ? MBUS_DBOX_A_CREDIT(6) :
+ MBUS_DBOX_A_CREDIT(4);
+ else
+ val |= MBUS_DBOX_A_CREDIT(2);
+
+ if (IS_ALDERLAKE_P(i915)) {
+ val |= MBUS_DBOX_BW_CREDIT(2);
+ val |= MBUS_DBOX_B_CREDIT(8);
+ } else if (DISPLAY_VER(i915) >= 12) {
+ val |= MBUS_DBOX_BW_CREDIT(2);
+ val |= MBUS_DBOX_B_CREDIT(12);
+ } else {
+ val |= MBUS_DBOX_BW_CREDIT(1);
+ val |= MBUS_DBOX_B_CREDIT(8);
+ }
+
+ for_each_new_intel_crtc_in_state(state, crtc, new_crtc_state, i) {
+ if (!new_crtc_state->hw.active ||
+ !intel_crtc_needs_modeset(new_crtc_state))
+ continue;
+
+ intel_de_write(i915, PIPE_MBUS_DBOX_CTL(crtc->pipe), val);
+ }
+}
*
*/
-#include <linux/module.h>
-#include <linux/string_helpers.h>
-#include <linux/pm_runtime.h>
-
-#include <drm/drm_atomic_helper.h>
-#include <drm/drm_blend.h>
-#include <drm/drm_fourcc.h>
-#include <drm/drm_plane_helper.h>
-
-#include "display/intel_atomic.h"
-#include "display/intel_atomic_plane.h"
-#include "display/intel_bw.h"
#include "display/intel_de.h"
#include "display/intel_display_trace.h"
-#include "display/intel_display_types.h"
-#include "display/intel_fb.h"
-#include "display/intel_fbc.h"
-#include "display/intel_sprite.h"
-#include "display/skl_universal_plane.h"
+#include "display/skl_watermark.h"
#include "gt/intel_engine_regs.h"
#include "gt/intel_gt_regs.h"
-#include "gt/intel_llc.h"
#include "i915_drv.h"
-#include "i915_fixed.h"
-#include "i915_irq.h"
#include "intel_mchbar_regs.h"
-#include "intel_pcode.h"
#include "intel_pm.h"
#include "vlv_sideband.h"
-#include "../../../platform/x86/intel_ips.h"
-
-static void skl_sagv_disable(struct drm_i915_private *dev_priv);
struct drm_i915_clock_gating_funcs {
void (*init_clock_gating)(struct drm_i915_private *i915);
};
-/* Stores plane specific WM parameters */
-struct skl_wm_params {
- bool x_tiled, y_tiled;
- bool rc_surface;
- bool is_planar;
- u32 width;
- u8 cpp;
- u32 plane_pixel_rate;
- u32 y_min_scanlines;
- u32 plane_bytes_per_line;
- uint_fixed_16_16_t plane_blocks_per_line;
- uint_fixed_16_16_t y_tile_minimum;
- u32 linetime_us;
- u32 dbuf_block_size;
-};
-
/* used in computing the new watermarks state */
struct intel_wm_config {
unsigned int num_pipes_active;
return dev_priv->display.wm.max_level + 1;
}
-static bool intel_wm_plane_visible(const struct intel_crtc_state *crtc_state,
- const struct intel_plane_state *plane_state)
+bool intel_wm_plane_visible(const struct intel_crtc_state *crtc_state,
+ const struct intel_plane_state *plane_state)
{
struct intel_plane *plane = to_intel_plane(plane_state->uapi.plane);
result->enable = true;
}
-static void
-adjust_wm_latency(struct drm_i915_private *i915,
- u16 wm[], int max_level, int read_latency)
-{
- bool wm_lv_0_adjust_needed = i915->dram_info.wm_lv_0_adjust_needed;
- int i, level;
-
- /*
- * If a level n (n > 1) has a 0us latency, all levels m (m >= n)
- * need to be disabled. We make sure to sanitize the values out
- * of the punit to satisfy this requirement.
- */
- for (level = 1; level <= max_level; level++) {
- if (wm[level] == 0) {
- for (i = level + 1; i <= max_level; i++)
- wm[i] = 0;
-
- max_level = level - 1;
- break;
- }
- }
-
- /*
- * WaWmMemoryReadLatency
- *
- * punit doesn't take into account the read latency so we need
- * to add proper adjustement to each valid level we retrieve
- * from the punit when level 0 response data is 0us.
- */
- if (wm[0] == 0) {
- for (level = 0; level <= max_level; level++)
- wm[level] += read_latency;
- }
-
- /*
- * WA Level-0 adjustment for 16GB DIMMs: SKL+
- * If we could not get dimm info enable this WA to prevent from
- * any underrun. If not able to get Dimm info assume 16GB dimm
- * to avoid any underrun.
- */
- if (wm_lv_0_adjust_needed)
- wm[0] += 1;
-}
-
-static void mtl_read_wm_latency(struct drm_i915_private *i915, u16 wm[])
-{
- struct intel_uncore *uncore = &i915->uncore;
- int max_level = ilk_wm_max_level(i915);
- u32 val;
-
- val = intel_uncore_read(uncore, MTL_LATENCY_LP0_LP1);
- wm[0] = REG_FIELD_GET(MTL_LATENCY_LEVEL_EVEN_MASK, val);
- wm[1] = REG_FIELD_GET(MTL_LATENCY_LEVEL_ODD_MASK, val);
-
- val = intel_uncore_read(uncore, MTL_LATENCY_LP2_LP3);
- wm[2] = REG_FIELD_GET(MTL_LATENCY_LEVEL_EVEN_MASK, val);
- wm[3] = REG_FIELD_GET(MTL_LATENCY_LEVEL_ODD_MASK, val);
-
- val = intel_uncore_read(uncore, MTL_LATENCY_LP4_LP5);
- wm[4] = REG_FIELD_GET(MTL_LATENCY_LEVEL_EVEN_MASK, val);
- wm[5] = REG_FIELD_GET(MTL_LATENCY_LEVEL_ODD_MASK, val);
-
- adjust_wm_latency(i915, wm, max_level, 6);
-}
-
-static void skl_read_wm_latency(struct drm_i915_private *i915, u16 wm[])
-{
- int max_level = ilk_wm_max_level(i915);
- int read_latency = DISPLAY_VER(i915) >= 12 ? 3 : 2;
- int mult = IS_DG2(i915) ? 2 : 1;
- u32 val;
- int ret;
-
- /* read the first set of memory latencies[0:3] */
- val = 0; /* data0 to be programmed to 0 for first set */
- ret = snb_pcode_read(&i915->uncore, GEN9_PCODE_READ_MEM_LATENCY, &val, NULL);
- if (ret) {
- drm_err(&i915->drm, "SKL Mailbox read error = %d\n", ret);
- return;
- }
-
- wm[0] = (val & GEN9_MEM_LATENCY_LEVEL_MASK) * mult;
- wm[1] = ((val >> GEN9_MEM_LATENCY_LEVEL_1_5_SHIFT) &
- GEN9_MEM_LATENCY_LEVEL_MASK) * mult;
- wm[2] = ((val >> GEN9_MEM_LATENCY_LEVEL_2_6_SHIFT) &
- GEN9_MEM_LATENCY_LEVEL_MASK) * mult;
- wm[3] = ((val >> GEN9_MEM_LATENCY_LEVEL_3_7_SHIFT) &
- GEN9_MEM_LATENCY_LEVEL_MASK) * mult;
-
- /* read the second set of memory latencies[4:7] */
- val = 1; /* data0 to be programmed to 1 for second set */
- ret = snb_pcode_read(&i915->uncore, GEN9_PCODE_READ_MEM_LATENCY, &val, NULL);
- if (ret) {
- drm_err(&i915->drm, "SKL Mailbox read error = %d\n", ret);
- return;
- }
-
- wm[4] = (val & GEN9_MEM_LATENCY_LEVEL_MASK) * mult;
- wm[5] = ((val >> GEN9_MEM_LATENCY_LEVEL_1_5_SHIFT) &
- GEN9_MEM_LATENCY_LEVEL_MASK) * mult;
- wm[6] = ((val >> GEN9_MEM_LATENCY_LEVEL_2_6_SHIFT) &
- GEN9_MEM_LATENCY_LEVEL_MASK) * mult;
- wm[7] = ((val >> GEN9_MEM_LATENCY_LEVEL_3_7_SHIFT) &
- GEN9_MEM_LATENCY_LEVEL_MASK) * mult;
-
- adjust_wm_latency(i915, wm, max_level, read_latency);
-}
-
static void hsw_read_wm_latency(struct drm_i915_private *i915, u16 wm[])
{
u64 sskpd;
return 2;
}
-static void intel_print_wm_latency(struct drm_i915_private *dev_priv,
- const char *name,
- const u16 wm[])
+void intel_print_wm_latency(struct drm_i915_private *dev_priv,
+ const char *name, const u16 wm[])
{
int level, max_level = ilk_wm_max_level(dev_priv);
}
}
-static void skl_setup_wm_latency(struct drm_i915_private *dev_priv)
-{
- if (DISPLAY_VER(dev_priv) >= 14)
- mtl_read_wm_latency(dev_priv, dev_priv->display.wm.skl_latency);
- else
- skl_read_wm_latency(dev_priv, dev_priv->display.wm.skl_latency);
-
- intel_print_wm_latency(dev_priv, "Gen9 Plane", dev_priv->display.wm.skl_latency);
-}
-
static bool ilk_validate_pipe_wm(const struct drm_i915_private *dev_priv,
struct intel_pipe_wm *pipe_wm)
{
return _ilk_disable_lp_wm(dev_priv, WM_DIRTY_LP_ALL);
}
-u8 intel_enabled_dbuf_slices_mask(struct drm_i915_private *dev_priv)
+static void ilk_compute_wm_config(struct drm_i915_private *dev_priv,
+ struct intel_wm_config *config)
{
- u8 enabled_slices = 0;
- enum dbuf_slice slice;
+ struct intel_crtc *crtc;
- for_each_dbuf_slice(dev_priv, slice) {
- if (intel_uncore_read(&dev_priv->uncore,
- DBUF_CTL_S(slice)) & DBUF_POWER_STATE)
- enabled_slices |= BIT(slice);
- }
+ /* Compute the currently _active_ config */
+ for_each_intel_crtc(&dev_priv->drm, crtc) {
+ const struct intel_pipe_wm *wm = &crtc->wm.active.ilk;
- return enabled_slices;
-}
+ if (!wm->pipe_enabled)
+ continue;
-/*
- * FIXME: We still don't have the proper code detect if we need to apply the WA,
- * so assume we'll always need it in order to avoid underruns.
- */
-static bool skl_needs_memory_bw_wa(struct drm_i915_private *dev_priv)
-{
- return DISPLAY_VER(dev_priv) == 9;
+ config->sprites_enabled |= wm->sprites_enabled;
+ config->sprites_scaled |= wm->sprites_scaled;
+ config->num_pipes_active++;
+ }
}
-static bool
-intel_has_sagv(struct drm_i915_private *dev_priv)
+static void ilk_program_watermarks(struct drm_i915_private *dev_priv)
{
- return DISPLAY_VER(dev_priv) >= 9 && !IS_LP(dev_priv) &&
- dev_priv->display.sagv.status != I915_SAGV_NOT_CONTROLLED;
-}
+ struct intel_pipe_wm lp_wm_1_2 = {}, lp_wm_5_6 = {}, *best_lp_wm;
+ struct ilk_wm_maximums max;
+ struct intel_wm_config config = {};
+ struct ilk_wm_values results = {};
+ enum intel_ddb_partitioning partitioning;
-static u32
-intel_sagv_block_time(struct drm_i915_private *dev_priv)
-{
- if (DISPLAY_VER(dev_priv) >= 12) {
- u32 val = 0;
- int ret;
+ ilk_compute_wm_config(dev_priv, &config);
- ret = snb_pcode_read(&dev_priv->uncore,
- GEN12_PCODE_READ_SAGV_BLOCK_TIME_US,
- &val, NULL);
- if (ret) {
- drm_dbg_kms(&dev_priv->drm, "Couldn't read SAGV block time!\n");
- return 0;
- }
+ ilk_compute_wm_maximums(dev_priv, 1, &config, INTEL_DDB_PART_1_2, &max);
+ ilk_wm_merge(dev_priv, &config, &max, &lp_wm_1_2);
+
+ /* 5/6 split only in single pipe config on IVB+ */
+ if (DISPLAY_VER(dev_priv) >= 7 &&
+ config.num_pipes_active == 1 && config.sprites_enabled) {
+ ilk_compute_wm_maximums(dev_priv, 1, &config, INTEL_DDB_PART_5_6, &max);
+ ilk_wm_merge(dev_priv, &config, &max, &lp_wm_5_6);
- return val;
- } else if (DISPLAY_VER(dev_priv) == 11) {
- return 10;
- } else if (DISPLAY_VER(dev_priv) == 9 && !IS_LP(dev_priv)) {
- return 30;
+ best_lp_wm = ilk_find_best_result(dev_priv, &lp_wm_1_2, &lp_wm_5_6);
} else {
- return 0;
+ best_lp_wm = &lp_wm_1_2;
}
-}
-static void intel_sagv_init(struct drm_i915_private *i915)
-{
- if (!intel_has_sagv(i915))
- i915->display.sagv.status = I915_SAGV_NOT_CONTROLLED;
-
- /*
- * Probe to see if we have working SAGV control.
- * For icl+ this was already determined by intel_bw_init_hw().
- */
- if (DISPLAY_VER(i915) < 11)
- skl_sagv_disable(i915);
-
- drm_WARN_ON(&i915->drm, i915->display.sagv.status == I915_SAGV_UNKNOWN);
-
- i915->display.sagv.block_time_us = intel_sagv_block_time(i915);
-
- drm_dbg_kms(&i915->drm, "SAGV supported: %s, original SAGV block time: %u us\n",
- str_yes_no(intel_has_sagv(i915)), i915->display.sagv.block_time_us);
+ partitioning = (best_lp_wm == &lp_wm_1_2) ?
+ INTEL_DDB_PART_1_2 : INTEL_DDB_PART_5_6;
- /* avoid overflow when adding with wm0 latency/etc. */
- if (drm_WARN(&i915->drm, i915->display.sagv.block_time_us > U16_MAX,
- "Excessive SAGV block time %u, ignoring\n",
- i915->display.sagv.block_time_us))
- i915->display.sagv.block_time_us = 0;
+ ilk_compute_wm_results(dev_priv, best_lp_wm, partitioning, &results);
- if (!intel_has_sagv(i915))
- i915->display.sagv.block_time_us = 0;
+ ilk_write_wm_values(dev_priv, &results);
}
-/*
- * SAGV dynamically adjusts the system agent voltage and clock frequencies
- * depending on power and performance requirements. The display engine access
- * to system memory is blocked during the adjustment time. Because of the
- * blocking time, having this enabled can cause full system hangs and/or pipe
- * underruns if we don't meet all of the following requirements:
- *
- * - <= 1 pipe enabled
- * - All planes can enable watermarks for latencies >= SAGV engine block time
- * - We're not using an interlaced display configuration
- */
-static void skl_sagv_enable(struct drm_i915_private *dev_priv)
+static void ilk_initial_watermarks(struct intel_atomic_state *state,
+ struct intel_crtc *crtc)
{
- int ret;
-
- if (!intel_has_sagv(dev_priv))
- return;
-
- if (dev_priv->display.sagv.status == I915_SAGV_ENABLED)
- return;
-
- drm_dbg_kms(&dev_priv->drm, "Enabling SAGV\n");
- ret = snb_pcode_write(&dev_priv->uncore, GEN9_PCODE_SAGV_CONTROL,
- GEN9_SAGV_ENABLE);
-
- /* We don't need to wait for SAGV when enabling */
-
- /*
- * Some skl systems, pre-release machines in particular,
- * don't actually have SAGV.
- */
- if (IS_SKYLAKE(dev_priv) && ret == -ENXIO) {
- drm_dbg(&dev_priv->drm, "No SAGV found on system, ignoring\n");
- dev_priv->display.sagv.status = I915_SAGV_NOT_CONTROLLED;
- return;
- } else if (ret < 0) {
- drm_err(&dev_priv->drm, "Failed to enable SAGV\n");
- return;
- }
+ struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+ const struct intel_crtc_state *crtc_state =
+ intel_atomic_get_new_crtc_state(state, crtc);
- dev_priv->display.sagv.status = I915_SAGV_ENABLED;
+ mutex_lock(&dev_priv->display.wm.wm_mutex);
+ crtc->wm.active.ilk = crtc_state->wm.ilk.intermediate;
+ ilk_program_watermarks(dev_priv);
+ mutex_unlock(&dev_priv->display.wm.wm_mutex);
}
-static void skl_sagv_disable(struct drm_i915_private *dev_priv)
+static void ilk_optimize_watermarks(struct intel_atomic_state *state,
+ struct intel_crtc *crtc)
{
- int ret;
-
- if (!intel_has_sagv(dev_priv))
- return;
-
- if (dev_priv->display.sagv.status == I915_SAGV_DISABLED)
- return;
+ struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+ const struct intel_crtc_state *crtc_state =
+ intel_atomic_get_new_crtc_state(state, crtc);
- drm_dbg_kms(&dev_priv->drm, "Disabling SAGV\n");
- /* bspec says to keep retrying for at least 1 ms */
- ret = skl_pcode_request(&dev_priv->uncore, GEN9_PCODE_SAGV_CONTROL,
- GEN9_SAGV_DISABLE,
- GEN9_SAGV_IS_DISABLED, GEN9_SAGV_IS_DISABLED,
- 1);
- /*
- * Some skl systems, pre-release machines in particular,
- * don't actually have SAGV.
- */
- if (IS_SKYLAKE(dev_priv) && ret == -ENXIO) {
- drm_dbg(&dev_priv->drm, "No SAGV found on system, ignoring\n");
- dev_priv->display.sagv.status = I915_SAGV_NOT_CONTROLLED;
- return;
- } else if (ret < 0) {
- drm_err(&dev_priv->drm, "Failed to disable SAGV (%d)\n", ret);
+ if (!crtc_state->wm.need_postvbl_update)
return;
- }
- dev_priv->display.sagv.status = I915_SAGV_DISABLED;
+ mutex_lock(&dev_priv->display.wm.wm_mutex);
+ crtc->wm.active.ilk = crtc_state->wm.ilk.optimal;
+ ilk_program_watermarks(dev_priv);
+ mutex_unlock(&dev_priv->display.wm.wm_mutex);
}
-static void skl_sagv_pre_plane_update(struct intel_atomic_state *state)
+static void ilk_pipe_wm_get_hw_state(struct intel_crtc *crtc)
{
- struct drm_i915_private *i915 = to_i915(state->base.dev);
- const struct intel_bw_state *new_bw_state =
- intel_atomic_get_new_bw_state(state);
+ struct drm_device *dev = crtc->base.dev;
+ struct drm_i915_private *dev_priv = to_i915(dev);
+ struct ilk_wm_values *hw = &dev_priv->display.wm.hw;
+ struct intel_crtc_state *crtc_state = to_intel_crtc_state(crtc->base.state);
+ struct intel_pipe_wm *active = &crtc_state->wm.ilk.optimal;
+ enum pipe pipe = crtc->pipe;
- if (!new_bw_state)
- return;
+ hw->wm_pipe[pipe] = intel_uncore_read(&dev_priv->uncore, WM0_PIPE_ILK(pipe));
- if (!intel_can_enable_sagv(i915, new_bw_state))
- skl_sagv_disable(i915);
-}
+ memset(active, 0, sizeof(*active));
-static void skl_sagv_post_plane_update(struct intel_atomic_state *state)
-{
- struct drm_i915_private *i915 = to_i915(state->base.dev);
- const struct intel_bw_state *new_bw_state =
- intel_atomic_get_new_bw_state(state);
+ active->pipe_enabled = crtc->active;
- if (!new_bw_state)
- return;
+ if (active->pipe_enabled) {
+ u32 tmp = hw->wm_pipe[pipe];
- if (intel_can_enable_sagv(i915, new_bw_state))
- skl_sagv_enable(i915);
-}
+ /*
+ * For active pipes LP0 watermark is marked as
+ * enabled, and LP1+ watermaks as disabled since
+ * we can't really reverse compute them in case
+ * multiple pipes are active.
+ */
+ active->wm[0].enable = true;
+ active->wm[0].pri_val = REG_FIELD_GET(WM0_PIPE_PRIMARY_MASK, tmp);
+ active->wm[0].spr_val = REG_FIELD_GET(WM0_PIPE_SPRITE_MASK, tmp);
+ active->wm[0].cur_val = REG_FIELD_GET(WM0_PIPE_CURSOR_MASK, tmp);
+ } else {
+ int level, max_level = ilk_wm_max_level(dev_priv);
-static void icl_sagv_pre_plane_update(struct intel_atomic_state *state)
-{
- struct drm_i915_private *dev_priv = to_i915(state->base.dev);
- const struct intel_bw_state *old_bw_state =
- intel_atomic_get_old_bw_state(state);
- const struct intel_bw_state *new_bw_state =
- intel_atomic_get_new_bw_state(state);
- u16 old_mask, new_mask;
+ /*
+ * For inactive pipes, all watermark levels
+ * should be marked as enabled but zeroed,
+ * which is what we'd compute them to.
+ */
+ for (level = 0; level <= max_level; level++)
+ active->wm[level].enable = true;
+ }
- if (!new_bw_state)
- return;
+ crtc->wm.active.ilk = *active;
+}
- old_mask = old_bw_state->qgv_points_mask;
- new_mask = old_bw_state->qgv_points_mask | new_bw_state->qgv_points_mask;
+#define _FW_WM(value, plane) \
+ (((value) & DSPFW_ ## plane ## _MASK) >> DSPFW_ ## plane ## _SHIFT)
+#define _FW_WM_VLV(value, plane) \
+ (((value) & DSPFW_ ## plane ## _MASK_VLV) >> DSPFW_ ## plane ## _SHIFT)
- if (old_mask == new_mask)
- return;
+static void g4x_read_wm_values(struct drm_i915_private *dev_priv,
+ struct g4x_wm_values *wm)
+{
+ u32 tmp;
- WARN_ON(!new_bw_state->base.changed);
+ tmp = intel_uncore_read(&dev_priv->uncore, DSPFW1);
+ wm->sr.plane = _FW_WM(tmp, SR);
+ wm->pipe[PIPE_B].plane[PLANE_CURSOR] = _FW_WM(tmp, CURSORB);
+ wm->pipe[PIPE_B].plane[PLANE_PRIMARY] = _FW_WM(tmp, PLANEB);
+ wm->pipe[PIPE_A].plane[PLANE_PRIMARY] = _FW_WM(tmp, PLANEA);
- drm_dbg_kms(&dev_priv->drm, "Restricting QGV points: 0x%x -> 0x%x\n",
- old_mask, new_mask);
+ tmp = intel_uncore_read(&dev_priv->uncore, DSPFW2);
+ wm->fbc_en = tmp & DSPFW_FBC_SR_EN;
+ wm->sr.fbc = _FW_WM(tmp, FBC_SR);
+ wm->hpll.fbc = _FW_WM(tmp, FBC_HPLL_SR);
+ wm->pipe[PIPE_B].plane[PLANE_SPRITE0] = _FW_WM(tmp, SPRITEB);
+ wm->pipe[PIPE_A].plane[PLANE_CURSOR] = _FW_WM(tmp, CURSORA);
+ wm->pipe[PIPE_A].plane[PLANE_SPRITE0] = _FW_WM(tmp, SPRITEA);
- /*
- * Restrict required qgv points before updating the configuration.
- * According to BSpec we can't mask and unmask qgv points at the same
- * time. Also masking should be done before updating the configuration
- * and unmasking afterwards.
- */
- icl_pcode_restrict_qgv_points(dev_priv, new_mask);
+ tmp = intel_uncore_read(&dev_priv->uncore, DSPFW3);
+ wm->hpll_en = tmp & DSPFW_HPLL_SR_EN;
+ wm->sr.cursor = _FW_WM(tmp, CURSOR_SR);
+ wm->hpll.cursor = _FW_WM(tmp, HPLL_CURSOR);
+ wm->hpll.plane = _FW_WM(tmp, HPLL_SR);
}
-static void icl_sagv_post_plane_update(struct intel_atomic_state *state)
+static void vlv_read_wm_values(struct drm_i915_private *dev_priv,
+ struct vlv_wm_values *wm)
{
- struct drm_i915_private *dev_priv = to_i915(state->base.dev);
- const struct intel_bw_state *old_bw_state =
- intel_atomic_get_old_bw_state(state);
- const struct intel_bw_state *new_bw_state =
- intel_atomic_get_new_bw_state(state);
- u16 old_mask, new_mask;
-
- if (!new_bw_state)
- return;
+ enum pipe pipe;
+ u32 tmp;
- old_mask = old_bw_state->qgv_points_mask | new_bw_state->qgv_points_mask;
- new_mask = new_bw_state->qgv_points_mask;
+ for_each_pipe(dev_priv, pipe) {
+ tmp = intel_uncore_read(&dev_priv->uncore, VLV_DDL(pipe));
- if (old_mask == new_mask)
- return;
+ wm->ddl[pipe].plane[PLANE_PRIMARY] =
+ (tmp >> DDL_PLANE_SHIFT) & (DDL_PRECISION_HIGH | DRAIN_LATENCY_MASK);
+ wm->ddl[pipe].plane[PLANE_CURSOR] =
+ (tmp >> DDL_CURSOR_SHIFT) & (DDL_PRECISION_HIGH | DRAIN_LATENCY_MASK);
+ wm->ddl[pipe].plane[PLANE_SPRITE0] =
+ (tmp >> DDL_SPRITE_SHIFT(0)) & (DDL_PRECISION_HIGH | DRAIN_LATENCY_MASK);
+ wm->ddl[pipe].plane[PLANE_SPRITE1] =
+ (tmp >> DDL_SPRITE_SHIFT(1)) & (DDL_PRECISION_HIGH | DRAIN_LATENCY_MASK);
+ }
- WARN_ON(!new_bw_state->base.changed);
+ tmp = intel_uncore_read(&dev_priv->uncore, DSPFW1);
+ wm->sr.plane = _FW_WM(tmp, SR);
+ wm->pipe[PIPE_B].plane[PLANE_CURSOR] = _FW_WM(tmp, CURSORB);
+ wm->pipe[PIPE_B].plane[PLANE_PRIMARY] = _FW_WM_VLV(tmp, PLANEB);
+ wm->pipe[PIPE_A].plane[PLANE_PRIMARY] = _FW_WM_VLV(tmp, PLANEA);
- drm_dbg_kms(&dev_priv->drm, "Relaxing QGV points: 0x%x -> 0x%x\n",
- old_mask, new_mask);
+ tmp = intel_uncore_read(&dev_priv->uncore, DSPFW2);
+ wm->pipe[PIPE_A].plane[PLANE_SPRITE1] = _FW_WM_VLV(tmp, SPRITEB);
+ wm->pipe[PIPE_A].plane[PLANE_CURSOR] = _FW_WM(tmp, CURSORA);
+ wm->pipe[PIPE_A].plane[PLANE_SPRITE0] = _FW_WM_VLV(tmp, SPRITEA);
- /*
- * Allow required qgv points after updating the configuration.
- * According to BSpec we can't mask and unmask qgv points at the same
- * time. Also masking should be done before updating the configuration
- * and unmasking afterwards.
- */
- icl_pcode_restrict_qgv_points(dev_priv, new_mask);
-}
+ tmp = intel_uncore_read(&dev_priv->uncore, DSPFW3);
+ wm->sr.cursor = _FW_WM(tmp, CURSOR_SR);
-void intel_sagv_pre_plane_update(struct intel_atomic_state *state)
-{
- struct drm_i915_private *i915 = to_i915(state->base.dev);
+ if (IS_CHERRYVIEW(dev_priv)) {
+ tmp = intel_uncore_read(&dev_priv->uncore, DSPFW7_CHV);
+ wm->pipe[PIPE_B].plane[PLANE_SPRITE1] = _FW_WM_VLV(tmp, SPRITED);
+ wm->pipe[PIPE_B].plane[PLANE_SPRITE0] = _FW_WM_VLV(tmp, SPRITEC);
- /*
- * Just return if we can't control SAGV or don't have it.
- * This is different from situation when we have SAGV but just can't
- * afford it due to DBuf limitation - in case if SAGV is completely
- * disabled in a BIOS, we are not even allowed to send a PCode request,
- * as it will throw an error. So have to check it here.
- */
- if (!intel_has_sagv(i915))
- return;
-
- if (DISPLAY_VER(i915) >= 11)
- icl_sagv_pre_plane_update(state);
- else
- skl_sagv_pre_plane_update(state);
-}
-
-void intel_sagv_post_plane_update(struct intel_atomic_state *state)
-{
- struct drm_i915_private *i915 = to_i915(state->base.dev);
-
- /*
- * Just return if we can't control SAGV or don't have it.
- * This is different from situation when we have SAGV but just can't
- * afford it due to DBuf limitation - in case if SAGV is completely
- * disabled in a BIOS, we are not even allowed to send a PCode request,
- * as it will throw an error. So have to check it here.
- */
- if (!intel_has_sagv(i915))
- return;
-
- if (DISPLAY_VER(i915) >= 11)
- icl_sagv_post_plane_update(state);
- else
- skl_sagv_post_plane_update(state);
-}
-
-static bool skl_crtc_can_enable_sagv(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);
- enum plane_id plane_id;
- int max_level = INT_MAX;
-
- if (!intel_has_sagv(dev_priv))
- return false;
-
- if (!crtc_state->hw.active)
- return true;
-
- if (crtc_state->hw.pipe_mode.flags & DRM_MODE_FLAG_INTERLACE)
- return false;
-
- for_each_plane_id_on_crtc(crtc, plane_id) {
- const struct skl_plane_wm *wm =
- &crtc_state->wm.skl.optimal.planes[plane_id];
- int level;
-
- /* Skip this plane if it's not enabled */
- if (!wm->wm[0].enable)
- continue;
-
- /* Find the highest enabled wm level for this plane */
- for (level = ilk_wm_max_level(dev_priv);
- !wm->wm[level].enable; --level)
- { }
-
- /* Highest common enabled wm level for all planes */
- max_level = min(level, max_level);
- }
-
- /* No enabled planes? */
- if (max_level == INT_MAX)
- return true;
-
- for_each_plane_id_on_crtc(crtc, plane_id) {
- const struct skl_plane_wm *wm =
- &crtc_state->wm.skl.optimal.planes[plane_id];
-
- /*
- * All enabled planes must have enabled a common wm level that
- * can tolerate memory latencies higher than sagv_block_time_us
- */
- if (wm->wm[0].enable && !wm->wm[max_level].can_sagv)
- return false;
- }
-
- return true;
-}
-
-static bool tgl_crtc_can_enable_sagv(const struct intel_crtc_state *crtc_state)
-{
- struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
- enum plane_id plane_id;
-
- if (!crtc_state->hw.active)
- return true;
-
- for_each_plane_id_on_crtc(crtc, plane_id) {
- const struct skl_plane_wm *wm =
- &crtc_state->wm.skl.optimal.planes[plane_id];
-
- if (wm->wm[0].enable && !wm->sagv.wm0.enable)
- return false;
- }
-
- return true;
-}
-
-static bool intel_crtc_can_enable_sagv(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);
-
- if (DISPLAY_VER(dev_priv) >= 12)
- return tgl_crtc_can_enable_sagv(crtc_state);
- else
- return skl_crtc_can_enable_sagv(crtc_state);
-}
-
-bool intel_can_enable_sagv(struct drm_i915_private *dev_priv,
- const struct intel_bw_state *bw_state)
-{
- if (DISPLAY_VER(dev_priv) < 11 &&
- bw_state->active_pipes && !is_power_of_2(bw_state->active_pipes))
- return false;
-
- return bw_state->pipe_sagv_reject == 0;
-}
-
-static int intel_compute_sagv_mask(struct intel_atomic_state *state)
-{
- struct drm_i915_private *dev_priv = to_i915(state->base.dev);
- int ret;
- struct intel_crtc *crtc;
- struct intel_crtc_state *new_crtc_state;
- struct intel_bw_state *new_bw_state = NULL;
- const struct intel_bw_state *old_bw_state = NULL;
- int i;
-
- for_each_new_intel_crtc_in_state(state, crtc,
- new_crtc_state, i) {
- new_bw_state = intel_atomic_get_bw_state(state);
- if (IS_ERR(new_bw_state))
- return PTR_ERR(new_bw_state);
-
- old_bw_state = intel_atomic_get_old_bw_state(state);
-
- if (intel_crtc_can_enable_sagv(new_crtc_state))
- new_bw_state->pipe_sagv_reject &= ~BIT(crtc->pipe);
- else
- new_bw_state->pipe_sagv_reject |= BIT(crtc->pipe);
- }
-
- if (!new_bw_state)
- return 0;
-
- new_bw_state->active_pipes =
- intel_calc_active_pipes(state, old_bw_state->active_pipes);
-
- if (new_bw_state->active_pipes != old_bw_state->active_pipes) {
- ret = intel_atomic_lock_global_state(&new_bw_state->base);
- if (ret)
- return ret;
- }
-
- if (intel_can_enable_sagv(dev_priv, new_bw_state) !=
- intel_can_enable_sagv(dev_priv, old_bw_state)) {
- ret = intel_atomic_serialize_global_state(&new_bw_state->base);
- if (ret)
- return ret;
- } else if (new_bw_state->pipe_sagv_reject != old_bw_state->pipe_sagv_reject) {
- ret = intel_atomic_lock_global_state(&new_bw_state->base);
- if (ret)
- return ret;
- }
-
- for_each_new_intel_crtc_in_state(state, crtc,
- new_crtc_state, i) {
- struct skl_pipe_wm *pipe_wm = &new_crtc_state->wm.skl.optimal;
-
- /*
- * We store use_sagv_wm in the crtc state rather than relying on
- * that bw state since we have no convenient way to get at the
- * latter from the plane commit hooks (especially in the legacy
- * cursor case)
- */
- pipe_wm->use_sagv_wm = !HAS_HW_SAGV_WM(dev_priv) &&
- DISPLAY_VER(dev_priv) >= 12 &&
- intel_can_enable_sagv(dev_priv, new_bw_state);
- }
-
- return 0;
-}
-
-static u16 skl_ddb_entry_init(struct skl_ddb_entry *entry,
- u16 start, u16 end)
-{
- entry->start = start;
- entry->end = end;
-
- return end;
-}
-
-static int intel_dbuf_slice_size(struct drm_i915_private *dev_priv)
-{
- return INTEL_INFO(dev_priv)->display.dbuf.size /
- hweight8(INTEL_INFO(dev_priv)->display.dbuf.slice_mask);
-}
-
-static void
-skl_ddb_entry_for_slices(struct drm_i915_private *dev_priv, u8 slice_mask,
- struct skl_ddb_entry *ddb)
-{
- int slice_size = intel_dbuf_slice_size(dev_priv);
-
- if (!slice_mask) {
- ddb->start = 0;
- ddb->end = 0;
- return;
- }
-
- ddb->start = (ffs(slice_mask) - 1) * slice_size;
- ddb->end = fls(slice_mask) * slice_size;
-
- WARN_ON(ddb->start >= ddb->end);
- WARN_ON(ddb->end > INTEL_INFO(dev_priv)->display.dbuf.size);
-}
-
-static unsigned int mbus_ddb_offset(struct drm_i915_private *i915, u8 slice_mask)
-{
- struct skl_ddb_entry ddb;
-
- if (slice_mask & (BIT(DBUF_S1) | BIT(DBUF_S2)))
- slice_mask = BIT(DBUF_S1);
- else if (slice_mask & (BIT(DBUF_S3) | BIT(DBUF_S4)))
- slice_mask = BIT(DBUF_S3);
-
- skl_ddb_entry_for_slices(i915, slice_mask, &ddb);
-
- return ddb.start;
-}
-
-u32 skl_ddb_dbuf_slice_mask(struct drm_i915_private *dev_priv,
- const struct skl_ddb_entry *entry)
-{
- int slice_size = intel_dbuf_slice_size(dev_priv);
- enum dbuf_slice start_slice, end_slice;
- u8 slice_mask = 0;
-
- if (!skl_ddb_entry_size(entry))
- return 0;
-
- start_slice = entry->start / slice_size;
- end_slice = (entry->end - 1) / slice_size;
-
- /*
- * Per plane DDB entry can in a really worst case be on multiple slices
- * but single entry is anyway contigious.
- */
- while (start_slice <= end_slice) {
- slice_mask |= BIT(start_slice);
- start_slice++;
- }
-
- return slice_mask;
-}
-
-static unsigned int intel_crtc_ddb_weight(const struct intel_crtc_state *crtc_state)
-{
- const struct drm_display_mode *pipe_mode = &crtc_state->hw.pipe_mode;
- int hdisplay, vdisplay;
-
- if (!crtc_state->hw.active)
- return 0;
-
- /*
- * Watermark/ddb requirement highly depends upon width of the
- * framebuffer, So instead of allocating DDB equally among pipes
- * distribute DDB based on resolution/width of the display.
- */
- drm_mode_get_hv_timing(pipe_mode, &hdisplay, &vdisplay);
-
- return hdisplay;
-}
-
-static void intel_crtc_dbuf_weights(const struct intel_dbuf_state *dbuf_state,
- enum pipe for_pipe,
- unsigned int *weight_start,
- unsigned int *weight_end,
- unsigned int *weight_total)
-{
- struct drm_i915_private *dev_priv =
- to_i915(dbuf_state->base.state->base.dev);
- enum pipe pipe;
-
- *weight_start = 0;
- *weight_end = 0;
- *weight_total = 0;
-
- for_each_pipe(dev_priv, pipe) {
- int weight = dbuf_state->weight[pipe];
-
- /*
- * Do not account pipes using other slice sets
- * luckily as of current BSpec slice sets do not partially
- * intersect(pipes share either same one slice or same slice set
- * i.e no partial intersection), so it is enough to check for
- * equality for now.
- */
- if (dbuf_state->slices[pipe] != dbuf_state->slices[for_pipe])
- continue;
-
- *weight_total += weight;
- if (pipe < for_pipe) {
- *weight_start += weight;
- *weight_end += weight;
- } else if (pipe == for_pipe) {
- *weight_end += weight;
- }
- }
-}
-
-static int
-skl_crtc_allocate_ddb(struct intel_atomic_state *state, struct intel_crtc *crtc)
-{
- struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
- unsigned int weight_total, weight_start, weight_end;
- const struct intel_dbuf_state *old_dbuf_state =
- intel_atomic_get_old_dbuf_state(state);
- struct intel_dbuf_state *new_dbuf_state =
- intel_atomic_get_new_dbuf_state(state);
- struct intel_crtc_state *crtc_state;
- struct skl_ddb_entry ddb_slices;
- enum pipe pipe = crtc->pipe;
- unsigned int mbus_offset = 0;
- u32 ddb_range_size;
- u32 dbuf_slice_mask;
- u32 start, end;
- int ret;
-
- if (new_dbuf_state->weight[pipe] == 0) {
- skl_ddb_entry_init(&new_dbuf_state->ddb[pipe], 0, 0);
- goto out;
- }
-
- dbuf_slice_mask = new_dbuf_state->slices[pipe];
-
- skl_ddb_entry_for_slices(dev_priv, dbuf_slice_mask, &ddb_slices);
- mbus_offset = mbus_ddb_offset(dev_priv, dbuf_slice_mask);
- ddb_range_size = skl_ddb_entry_size(&ddb_slices);
-
- intel_crtc_dbuf_weights(new_dbuf_state, pipe,
- &weight_start, &weight_end, &weight_total);
-
- start = ddb_range_size * weight_start / weight_total;
- end = ddb_range_size * weight_end / weight_total;
-
- skl_ddb_entry_init(&new_dbuf_state->ddb[pipe],
- ddb_slices.start - mbus_offset + start,
- ddb_slices.start - mbus_offset + end);
-
-out:
- if (old_dbuf_state->slices[pipe] == new_dbuf_state->slices[pipe] &&
- skl_ddb_entry_equal(&old_dbuf_state->ddb[pipe],
- &new_dbuf_state->ddb[pipe]))
- return 0;
-
- ret = intel_atomic_lock_global_state(&new_dbuf_state->base);
- if (ret)
- return ret;
-
- crtc_state = intel_atomic_get_crtc_state(&state->base, crtc);
- if (IS_ERR(crtc_state))
- return PTR_ERR(crtc_state);
-
- /*
- * Used for checking overlaps, so we need absolute
- * offsets instead of MBUS relative offsets.
- */
- crtc_state->wm.skl.ddb.start = mbus_offset + new_dbuf_state->ddb[pipe].start;
- crtc_state->wm.skl.ddb.end = mbus_offset + new_dbuf_state->ddb[pipe].end;
-
- drm_dbg_kms(&dev_priv->drm,
- "[CRTC:%d:%s] dbuf slices 0x%x -> 0x%x, ddb (%d - %d) -> (%d - %d), active pipes 0x%x -> 0x%x\n",
- crtc->base.base.id, crtc->base.name,
- old_dbuf_state->slices[pipe], new_dbuf_state->slices[pipe],
- old_dbuf_state->ddb[pipe].start, old_dbuf_state->ddb[pipe].end,
- new_dbuf_state->ddb[pipe].start, new_dbuf_state->ddb[pipe].end,
- old_dbuf_state->active_pipes, new_dbuf_state->active_pipes);
-
- return 0;
-}
-
-static int skl_compute_wm_params(const struct intel_crtc_state *crtc_state,
- int width, const struct drm_format_info *format,
- u64 modifier, unsigned int rotation,
- u32 plane_pixel_rate, struct skl_wm_params *wp,
- int color_plane);
-
-static void skl_compute_plane_wm(const struct intel_crtc_state *crtc_state,
- struct intel_plane *plane,
- int level,
- unsigned int latency,
- const struct skl_wm_params *wp,
- const struct skl_wm_level *result_prev,
- struct skl_wm_level *result /* out */);
-
-static unsigned int
-skl_cursor_allocation(const struct intel_crtc_state *crtc_state,
- int num_active)
-{
- struct intel_plane *plane = to_intel_plane(crtc_state->uapi.crtc->cursor);
- struct drm_i915_private *dev_priv = to_i915(crtc_state->uapi.crtc->dev);
- int level, max_level = ilk_wm_max_level(dev_priv);
- struct skl_wm_level wm = {};
- int ret, min_ddb_alloc = 0;
- struct skl_wm_params wp;
-
- ret = skl_compute_wm_params(crtc_state, 256,
- drm_format_info(DRM_FORMAT_ARGB8888),
- DRM_FORMAT_MOD_LINEAR,
- DRM_MODE_ROTATE_0,
- crtc_state->pixel_rate, &wp, 0);
- drm_WARN_ON(&dev_priv->drm, ret);
-
- for (level = 0; level <= max_level; level++) {
- unsigned int latency = dev_priv->display.wm.skl_latency[level];
-
- skl_compute_plane_wm(crtc_state, plane, level, latency, &wp, &wm, &wm);
- if (wm.min_ddb_alloc == U16_MAX)
- break;
-
- min_ddb_alloc = wm.min_ddb_alloc;
- }
-
- return max(num_active == 1 ? 32 : 8, min_ddb_alloc);
-}
-
-static void skl_ddb_entry_init_from_hw(struct skl_ddb_entry *entry, u32 reg)
-{
- skl_ddb_entry_init(entry,
- REG_FIELD_GET(PLANE_BUF_START_MASK, reg),
- REG_FIELD_GET(PLANE_BUF_END_MASK, reg));
- if (entry->end)
- entry->end++;
-}
-
-static void
-skl_ddb_get_hw_plane_state(struct drm_i915_private *dev_priv,
- const enum pipe pipe,
- const enum plane_id plane_id,
- struct skl_ddb_entry *ddb,
- struct skl_ddb_entry *ddb_y)
-{
- u32 val;
-
- /* Cursor doesn't support NV12/planar, so no extra calculation needed */
- if (plane_id == PLANE_CURSOR) {
- val = intel_uncore_read(&dev_priv->uncore, CUR_BUF_CFG(pipe));
- skl_ddb_entry_init_from_hw(ddb, val);
- return;
- }
-
- val = intel_uncore_read(&dev_priv->uncore, PLANE_BUF_CFG(pipe, plane_id));
- skl_ddb_entry_init_from_hw(ddb, val);
-
- if (DISPLAY_VER(dev_priv) >= 11)
- return;
-
- val = intel_uncore_read(&dev_priv->uncore, PLANE_NV12_BUF_CFG(pipe, plane_id));
- skl_ddb_entry_init_from_hw(ddb_y, val);
-}
-
-static void skl_pipe_ddb_get_hw_state(struct intel_crtc *crtc,
- struct skl_ddb_entry *ddb,
- struct skl_ddb_entry *ddb_y)
-{
- struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
- enum intel_display_power_domain power_domain;
- enum pipe pipe = crtc->pipe;
- intel_wakeref_t wakeref;
- enum plane_id plane_id;
-
- power_domain = POWER_DOMAIN_PIPE(pipe);
- wakeref = intel_display_power_get_if_enabled(dev_priv, power_domain);
- if (!wakeref)
- return;
-
- for_each_plane_id_on_crtc(crtc, plane_id)
- skl_ddb_get_hw_plane_state(dev_priv, pipe,
- plane_id,
- &ddb[plane_id],
- &ddb_y[plane_id]);
-
- intel_display_power_put(dev_priv, power_domain, wakeref);
-}
-
-struct dbuf_slice_conf_entry {
- u8 active_pipes;
- u8 dbuf_mask[I915_MAX_PIPES];
- bool join_mbus;
-};
-
-/*
- * Table taken from Bspec 12716
- * Pipes do have some preferred DBuf slice affinity,
- * plus there are some hardcoded requirements on how
- * those should be distributed for multipipe scenarios.
- * For more DBuf slices algorithm can get even more messy
- * and less readable, so decided to use a table almost
- * as is from BSpec itself - that way it is at least easier
- * to compare, change and check.
- */
-static const struct dbuf_slice_conf_entry icl_allowed_dbufs[] =
-/* Autogenerated with igt/tools/intel_dbuf_map tool: */
-{
- {
- .active_pipes = BIT(PIPE_A),
- .dbuf_mask = {
- [PIPE_A] = BIT(DBUF_S1),
- },
- },
- {
- .active_pipes = BIT(PIPE_B),
- .dbuf_mask = {
- [PIPE_B] = BIT(DBUF_S1),
- },
- },
- {
- .active_pipes = BIT(PIPE_A) | BIT(PIPE_B),
- .dbuf_mask = {
- [PIPE_A] = BIT(DBUF_S1),
- [PIPE_B] = BIT(DBUF_S2),
- },
- },
- {
- .active_pipes = BIT(PIPE_C),
- .dbuf_mask = {
- [PIPE_C] = BIT(DBUF_S2),
- },
- },
- {
- .active_pipes = BIT(PIPE_A) | BIT(PIPE_C),
- .dbuf_mask = {
- [PIPE_A] = BIT(DBUF_S1),
- [PIPE_C] = BIT(DBUF_S2),
- },
- },
- {
- .active_pipes = BIT(PIPE_B) | BIT(PIPE_C),
- .dbuf_mask = {
- [PIPE_B] = BIT(DBUF_S1),
- [PIPE_C] = BIT(DBUF_S2),
- },
- },
- {
- .active_pipes = BIT(PIPE_A) | BIT(PIPE_B) | BIT(PIPE_C),
- .dbuf_mask = {
- [PIPE_A] = BIT(DBUF_S1),
- [PIPE_B] = BIT(DBUF_S1),
- [PIPE_C] = BIT(DBUF_S2),
- },
- },
- {}
-};
-
-/*
- * Table taken from Bspec 49255
- * Pipes do have some preferred DBuf slice affinity,
- * plus there are some hardcoded requirements on how
- * those should be distributed for multipipe scenarios.
- * For more DBuf slices algorithm can get even more messy
- * and less readable, so decided to use a table almost
- * as is from BSpec itself - that way it is at least easier
- * to compare, change and check.
- */
-static const struct dbuf_slice_conf_entry tgl_allowed_dbufs[] =
-/* Autogenerated with igt/tools/intel_dbuf_map tool: */
-{
- {
- .active_pipes = BIT(PIPE_A),
- .dbuf_mask = {
- [PIPE_A] = BIT(DBUF_S1) | BIT(DBUF_S2),
- },
- },
- {
- .active_pipes = BIT(PIPE_B),
- .dbuf_mask = {
- [PIPE_B] = BIT(DBUF_S1) | BIT(DBUF_S2),
- },
- },
- {
- .active_pipes = BIT(PIPE_A) | BIT(PIPE_B),
- .dbuf_mask = {
- [PIPE_A] = BIT(DBUF_S2),
- [PIPE_B] = BIT(DBUF_S1),
- },
- },
- {
- .active_pipes = BIT(PIPE_C),
- .dbuf_mask = {
- [PIPE_C] = BIT(DBUF_S2) | BIT(DBUF_S1),
- },
- },
- {
- .active_pipes = BIT(PIPE_A) | BIT(PIPE_C),
- .dbuf_mask = {
- [PIPE_A] = BIT(DBUF_S1),
- [PIPE_C] = BIT(DBUF_S2),
- },
- },
- {
- .active_pipes = BIT(PIPE_B) | BIT(PIPE_C),
- .dbuf_mask = {
- [PIPE_B] = BIT(DBUF_S1),
- [PIPE_C] = BIT(DBUF_S2),
- },
- },
- {
- .active_pipes = BIT(PIPE_A) | BIT(PIPE_B) | BIT(PIPE_C),
- .dbuf_mask = {
- [PIPE_A] = BIT(DBUF_S1),
- [PIPE_B] = BIT(DBUF_S1),
- [PIPE_C] = BIT(DBUF_S2),
- },
- },
- {
- .active_pipes = BIT(PIPE_D),
- .dbuf_mask = {
- [PIPE_D] = BIT(DBUF_S2) | BIT(DBUF_S1),
- },
- },
- {
- .active_pipes = BIT(PIPE_A) | BIT(PIPE_D),
- .dbuf_mask = {
- [PIPE_A] = BIT(DBUF_S1),
- [PIPE_D] = BIT(DBUF_S2),
- },
- },
- {
- .active_pipes = BIT(PIPE_B) | BIT(PIPE_D),
- .dbuf_mask = {
- [PIPE_B] = BIT(DBUF_S1),
- [PIPE_D] = BIT(DBUF_S2),
- },
- },
- {
- .active_pipes = BIT(PIPE_A) | BIT(PIPE_B) | BIT(PIPE_D),
- .dbuf_mask = {
- [PIPE_A] = BIT(DBUF_S1),
- [PIPE_B] = BIT(DBUF_S1),
- [PIPE_D] = BIT(DBUF_S2),
- },
- },
- {
- .active_pipes = BIT(PIPE_C) | BIT(PIPE_D),
- .dbuf_mask = {
- [PIPE_C] = BIT(DBUF_S1),
- [PIPE_D] = BIT(DBUF_S2),
- },
- },
- {
- .active_pipes = BIT(PIPE_A) | BIT(PIPE_C) | BIT(PIPE_D),
- .dbuf_mask = {
- [PIPE_A] = BIT(DBUF_S1),
- [PIPE_C] = BIT(DBUF_S2),
- [PIPE_D] = BIT(DBUF_S2),
- },
- },
- {
- .active_pipes = BIT(PIPE_B) | BIT(PIPE_C) | BIT(PIPE_D),
- .dbuf_mask = {
- [PIPE_B] = BIT(DBUF_S1),
- [PIPE_C] = BIT(DBUF_S2),
- [PIPE_D] = BIT(DBUF_S2),
- },
- },
- {
- .active_pipes = BIT(PIPE_A) | BIT(PIPE_B) | BIT(PIPE_C) | BIT(PIPE_D),
- .dbuf_mask = {
- [PIPE_A] = BIT(DBUF_S1),
- [PIPE_B] = BIT(DBUF_S1),
- [PIPE_C] = BIT(DBUF_S2),
- [PIPE_D] = BIT(DBUF_S2),
- },
- },
- {}
-};
-
-static const struct dbuf_slice_conf_entry dg2_allowed_dbufs[] = {
- {
- .active_pipes = BIT(PIPE_A),
- .dbuf_mask = {
- [PIPE_A] = BIT(DBUF_S1) | BIT(DBUF_S2),
- },
- },
- {
- .active_pipes = BIT(PIPE_B),
- .dbuf_mask = {
- [PIPE_B] = BIT(DBUF_S1) | BIT(DBUF_S2),
- },
- },
- {
- .active_pipes = BIT(PIPE_A) | BIT(PIPE_B),
- .dbuf_mask = {
- [PIPE_A] = BIT(DBUF_S1),
- [PIPE_B] = BIT(DBUF_S2),
- },
- },
- {
- .active_pipes = BIT(PIPE_C),
- .dbuf_mask = {
- [PIPE_C] = BIT(DBUF_S3) | BIT(DBUF_S4),
- },
- },
- {
- .active_pipes = BIT(PIPE_A) | BIT(PIPE_C),
- .dbuf_mask = {
- [PIPE_A] = BIT(DBUF_S1) | BIT(DBUF_S2),
- [PIPE_C] = BIT(DBUF_S3) | BIT(DBUF_S4),
- },
- },
- {
- .active_pipes = BIT(PIPE_B) | BIT(PIPE_C),
- .dbuf_mask = {
- [PIPE_B] = BIT(DBUF_S1) | BIT(DBUF_S2),
- [PIPE_C] = BIT(DBUF_S3) | BIT(DBUF_S4),
- },
- },
- {
- .active_pipes = BIT(PIPE_A) | BIT(PIPE_B) | BIT(PIPE_C),
- .dbuf_mask = {
- [PIPE_A] = BIT(DBUF_S1),
- [PIPE_B] = BIT(DBUF_S2),
- [PIPE_C] = BIT(DBUF_S3) | BIT(DBUF_S4),
- },
- },
- {
- .active_pipes = BIT(PIPE_D),
- .dbuf_mask = {
- [PIPE_D] = BIT(DBUF_S3) | BIT(DBUF_S4),
- },
- },
- {
- .active_pipes = BIT(PIPE_A) | BIT(PIPE_D),
- .dbuf_mask = {
- [PIPE_A] = BIT(DBUF_S1) | BIT(DBUF_S2),
- [PIPE_D] = BIT(DBUF_S3) | BIT(DBUF_S4),
- },
- },
- {
- .active_pipes = BIT(PIPE_B) | BIT(PIPE_D),
- .dbuf_mask = {
- [PIPE_B] = BIT(DBUF_S1) | BIT(DBUF_S2),
- [PIPE_D] = BIT(DBUF_S3) | BIT(DBUF_S4),
- },
- },
- {
- .active_pipes = BIT(PIPE_A) | BIT(PIPE_B) | BIT(PIPE_D),
- .dbuf_mask = {
- [PIPE_A] = BIT(DBUF_S1),
- [PIPE_B] = BIT(DBUF_S2),
- [PIPE_D] = BIT(DBUF_S3) | BIT(DBUF_S4),
- },
- },
- {
- .active_pipes = BIT(PIPE_C) | BIT(PIPE_D),
- .dbuf_mask = {
- [PIPE_C] = BIT(DBUF_S3),
- [PIPE_D] = BIT(DBUF_S4),
- },
- },
- {
- .active_pipes = BIT(PIPE_A) | BIT(PIPE_C) | BIT(PIPE_D),
- .dbuf_mask = {
- [PIPE_A] = BIT(DBUF_S1) | BIT(DBUF_S2),
- [PIPE_C] = BIT(DBUF_S3),
- [PIPE_D] = BIT(DBUF_S4),
- },
- },
- {
- .active_pipes = BIT(PIPE_B) | BIT(PIPE_C) | BIT(PIPE_D),
- .dbuf_mask = {
- [PIPE_B] = BIT(DBUF_S1) | BIT(DBUF_S2),
- [PIPE_C] = BIT(DBUF_S3),
- [PIPE_D] = BIT(DBUF_S4),
- },
- },
- {
- .active_pipes = BIT(PIPE_A) | BIT(PIPE_B) | BIT(PIPE_C) | BIT(PIPE_D),
- .dbuf_mask = {
- [PIPE_A] = BIT(DBUF_S1),
- [PIPE_B] = BIT(DBUF_S2),
- [PIPE_C] = BIT(DBUF_S3),
- [PIPE_D] = BIT(DBUF_S4),
- },
- },
- {}
-};
-
-static const struct dbuf_slice_conf_entry adlp_allowed_dbufs[] = {
- /*
- * Keep the join_mbus cases first so check_mbus_joined()
- * will prefer them over the !join_mbus cases.
- */
- {
- .active_pipes = BIT(PIPE_A),
- .dbuf_mask = {
- [PIPE_A] = BIT(DBUF_S1) | BIT(DBUF_S2) | BIT(DBUF_S3) | BIT(DBUF_S4),
- },
- .join_mbus = true,
- },
- {
- .active_pipes = BIT(PIPE_B),
- .dbuf_mask = {
- [PIPE_B] = BIT(DBUF_S1) | BIT(DBUF_S2) | BIT(DBUF_S3) | BIT(DBUF_S4),
- },
- .join_mbus = true,
- },
- {
- .active_pipes = BIT(PIPE_A),
- .dbuf_mask = {
- [PIPE_A] = BIT(DBUF_S1) | BIT(DBUF_S2),
- },
- .join_mbus = false,
- },
- {
- .active_pipes = BIT(PIPE_B),
- .dbuf_mask = {
- [PIPE_B] = BIT(DBUF_S3) | BIT(DBUF_S4),
- },
- .join_mbus = false,
- },
- {
- .active_pipes = BIT(PIPE_A) | BIT(PIPE_B),
- .dbuf_mask = {
- [PIPE_A] = BIT(DBUF_S1) | BIT(DBUF_S2),
- [PIPE_B] = BIT(DBUF_S3) | BIT(DBUF_S4),
- },
- },
- {
- .active_pipes = BIT(PIPE_C),
- .dbuf_mask = {
- [PIPE_C] = BIT(DBUF_S3) | BIT(DBUF_S4),
- },
- },
- {
- .active_pipes = BIT(PIPE_A) | BIT(PIPE_C),
- .dbuf_mask = {
- [PIPE_A] = BIT(DBUF_S1) | BIT(DBUF_S2),
- [PIPE_C] = BIT(DBUF_S3) | BIT(DBUF_S4),
- },
- },
- {
- .active_pipes = BIT(PIPE_B) | BIT(PIPE_C),
- .dbuf_mask = {
- [PIPE_B] = BIT(DBUF_S3) | BIT(DBUF_S4),
- [PIPE_C] = BIT(DBUF_S3) | BIT(DBUF_S4),
- },
- },
- {
- .active_pipes = BIT(PIPE_A) | BIT(PIPE_B) | BIT(PIPE_C),
- .dbuf_mask = {
- [PIPE_A] = BIT(DBUF_S1) | BIT(DBUF_S2),
- [PIPE_B] = BIT(DBUF_S3) | BIT(DBUF_S4),
- [PIPE_C] = BIT(DBUF_S3) | BIT(DBUF_S4),
- },
- },
- {
- .active_pipes = BIT(PIPE_D),
- .dbuf_mask = {
- [PIPE_D] = BIT(DBUF_S1) | BIT(DBUF_S2),
- },
- },
- {
- .active_pipes = BIT(PIPE_A) | BIT(PIPE_D),
- .dbuf_mask = {
- [PIPE_A] = BIT(DBUF_S1) | BIT(DBUF_S2),
- [PIPE_D] = BIT(DBUF_S1) | BIT(DBUF_S2),
- },
- },
- {
- .active_pipes = BIT(PIPE_B) | BIT(PIPE_D),
- .dbuf_mask = {
- [PIPE_B] = BIT(DBUF_S3) | BIT(DBUF_S4),
- [PIPE_D] = BIT(DBUF_S1) | BIT(DBUF_S2),
- },
- },
- {
- .active_pipes = BIT(PIPE_A) | BIT(PIPE_B) | BIT(PIPE_D),
- .dbuf_mask = {
- [PIPE_A] = BIT(DBUF_S1) | BIT(DBUF_S2),
- [PIPE_B] = BIT(DBUF_S3) | BIT(DBUF_S4),
- [PIPE_D] = BIT(DBUF_S1) | BIT(DBUF_S2),
- },
- },
- {
- .active_pipes = BIT(PIPE_C) | BIT(PIPE_D),
- .dbuf_mask = {
- [PIPE_C] = BIT(DBUF_S3) | BIT(DBUF_S4),
- [PIPE_D] = BIT(DBUF_S1) | BIT(DBUF_S2),
- },
- },
- {
- .active_pipes = BIT(PIPE_A) | BIT(PIPE_C) | BIT(PIPE_D),
- .dbuf_mask = {
- [PIPE_A] = BIT(DBUF_S1) | BIT(DBUF_S2),
- [PIPE_C] = BIT(DBUF_S3) | BIT(DBUF_S4),
- [PIPE_D] = BIT(DBUF_S1) | BIT(DBUF_S2),
- },
- },
- {
- .active_pipes = BIT(PIPE_B) | BIT(PIPE_C) | BIT(PIPE_D),
- .dbuf_mask = {
- [PIPE_B] = BIT(DBUF_S3) | BIT(DBUF_S4),
- [PIPE_C] = BIT(DBUF_S3) | BIT(DBUF_S4),
- [PIPE_D] = BIT(DBUF_S1) | BIT(DBUF_S2),
- },
- },
- {
- .active_pipes = BIT(PIPE_A) | BIT(PIPE_B) | BIT(PIPE_C) | BIT(PIPE_D),
- .dbuf_mask = {
- [PIPE_A] = BIT(DBUF_S1) | BIT(DBUF_S2),
- [PIPE_B] = BIT(DBUF_S3) | BIT(DBUF_S4),
- [PIPE_C] = BIT(DBUF_S3) | BIT(DBUF_S4),
- [PIPE_D] = BIT(DBUF_S1) | BIT(DBUF_S2),
- },
- },
- {}
-
-};
-
-static bool check_mbus_joined(u8 active_pipes,
- const struct dbuf_slice_conf_entry *dbuf_slices)
-{
- int i;
-
- for (i = 0; dbuf_slices[i].active_pipes != 0; i++) {
- if (dbuf_slices[i].active_pipes == active_pipes)
- return dbuf_slices[i].join_mbus;
- }
- return false;
-}
-
-static bool adlp_check_mbus_joined(u8 active_pipes)
-{
- return check_mbus_joined(active_pipes, adlp_allowed_dbufs);
-}
-
-static u8 compute_dbuf_slices(enum pipe pipe, u8 active_pipes, bool join_mbus,
- const struct dbuf_slice_conf_entry *dbuf_slices)
-{
- int i;
-
- for (i = 0; dbuf_slices[i].active_pipes != 0; i++) {
- if (dbuf_slices[i].active_pipes == active_pipes &&
- dbuf_slices[i].join_mbus == join_mbus)
- return dbuf_slices[i].dbuf_mask[pipe];
- }
- return 0;
-}
-
-/*
- * This function finds an entry with same enabled pipe configuration and
- * returns correspondent DBuf slice mask as stated in BSpec for particular
- * platform.
- */
-static u8 icl_compute_dbuf_slices(enum pipe pipe, u8 active_pipes, bool join_mbus)
-{
- /*
- * FIXME: For ICL this is still a bit unclear as prev BSpec revision
- * required calculating "pipe ratio" in order to determine
- * if one or two slices can be used for single pipe configurations
- * as additional constraint to the existing table.
- * However based on recent info, it should be not "pipe ratio"
- * but rather ratio between pixel_rate and cdclk with additional
- * constants, so for now we are using only table until this is
- * clarified. Also this is the reason why crtc_state param is
- * still here - we will need it once those additional constraints
- * pop up.
- */
- return compute_dbuf_slices(pipe, active_pipes, join_mbus,
- icl_allowed_dbufs);
-}
-
-static u8 tgl_compute_dbuf_slices(enum pipe pipe, u8 active_pipes, bool join_mbus)
-{
- return compute_dbuf_slices(pipe, active_pipes, join_mbus,
- tgl_allowed_dbufs);
-}
-
-static u8 adlp_compute_dbuf_slices(enum pipe pipe, u8 active_pipes, bool join_mbus)
-{
- return compute_dbuf_slices(pipe, active_pipes, join_mbus,
- adlp_allowed_dbufs);
-}
-
-static u8 dg2_compute_dbuf_slices(enum pipe pipe, u8 active_pipes, bool join_mbus)
-{
- return compute_dbuf_slices(pipe, active_pipes, join_mbus,
- dg2_allowed_dbufs);
-}
-
-static u8 skl_compute_dbuf_slices(struct intel_crtc *crtc, u8 active_pipes, bool join_mbus)
-{
- struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
- enum pipe pipe = crtc->pipe;
-
- if (IS_DG2(dev_priv))
- return dg2_compute_dbuf_slices(pipe, active_pipes, join_mbus);
- else if (DISPLAY_VER(dev_priv) >= 13)
- return adlp_compute_dbuf_slices(pipe, active_pipes, join_mbus);
- else if (DISPLAY_VER(dev_priv) == 12)
- return tgl_compute_dbuf_slices(pipe, active_pipes, join_mbus);
- else if (DISPLAY_VER(dev_priv) == 11)
- return icl_compute_dbuf_slices(pipe, active_pipes, join_mbus);
- /*
- * For anything else just return one slice yet.
- * Should be extended for other platforms.
- */
- return active_pipes & BIT(pipe) ? BIT(DBUF_S1) : 0;
-}
-
-static bool
-use_minimal_wm0_only(const struct intel_crtc_state *crtc_state,
- struct intel_plane *plane)
-{
- struct drm_i915_private *i915 = to_i915(plane->base.dev);
-
- return DISPLAY_VER(i915) >= 13 &&
- crtc_state->uapi.async_flip &&
- plane->async_flip;
-}
-
-static u64
-skl_total_relative_data_rate(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);
- enum plane_id plane_id;
- u64 data_rate = 0;
-
- for_each_plane_id_on_crtc(crtc, plane_id) {
- if (plane_id == PLANE_CURSOR)
- continue;
-
- data_rate += crtc_state->rel_data_rate[plane_id];
-
- if (DISPLAY_VER(i915) < 11)
- data_rate += crtc_state->rel_data_rate_y[plane_id];
- }
-
- return data_rate;
-}
-
-static const struct skl_wm_level *
-skl_plane_wm_level(const struct skl_pipe_wm *pipe_wm,
- enum plane_id plane_id,
- int level)
-{
- const struct skl_plane_wm *wm = &pipe_wm->planes[plane_id];
-
- if (level == 0 && pipe_wm->use_sagv_wm)
- return &wm->sagv.wm0;
-
- return &wm->wm[level];
-}
-
-static const struct skl_wm_level *
-skl_plane_trans_wm(const struct skl_pipe_wm *pipe_wm,
- enum plane_id plane_id)
-{
- const struct skl_plane_wm *wm = &pipe_wm->planes[plane_id];
-
- if (pipe_wm->use_sagv_wm)
- return &wm->sagv.trans_wm;
-
- return &wm->trans_wm;
-}
-
-/*
- * We only disable the watermarks for each plane if
- * they exceed the ddb allocation of said plane. This
- * is done so that we don't end up touching cursor
- * watermarks needlessly when some other plane reduces
- * our max possible watermark level.
- *
- * Bspec has this to say about the PLANE_WM enable bit:
- * "All the watermarks at this level for all enabled
- * planes must be enabled before the level will be used."
- * So this is actually safe to do.
- */
-static void
-skl_check_wm_level(struct skl_wm_level *wm, const struct skl_ddb_entry *ddb)
-{
- if (wm->min_ddb_alloc > skl_ddb_entry_size(ddb))
- memset(wm, 0, sizeof(*wm));
-}
-
-static void
-skl_check_nv12_wm_level(struct skl_wm_level *wm, struct skl_wm_level *uv_wm,
- const struct skl_ddb_entry *ddb_y, const struct skl_ddb_entry *ddb)
-{
- if (wm->min_ddb_alloc > skl_ddb_entry_size(ddb_y) ||
- uv_wm->min_ddb_alloc > skl_ddb_entry_size(ddb)) {
- memset(wm, 0, sizeof(*wm));
- memset(uv_wm, 0, sizeof(*uv_wm));
- }
-}
-
-static bool icl_need_wm1_wa(struct drm_i915_private *i915,
- enum plane_id plane_id)
-{
- /*
- * Wa_1408961008:icl, ehl
- * Wa_14012656716:tgl, adl
- * Underruns with WM1+ disabled
- */
- return DISPLAY_VER(i915) == 11 ||
- (IS_DISPLAY_VER(i915, 12, 13) && plane_id == PLANE_CURSOR);
-}
-
-struct skl_plane_ddb_iter {
- u64 data_rate;
- u16 start, size;
-};
-
-static void
-skl_allocate_plane_ddb(struct skl_plane_ddb_iter *iter,
- struct skl_ddb_entry *ddb,
- const struct skl_wm_level *wm,
- u64 data_rate)
-{
- u16 size, extra = 0;
-
- if (data_rate) {
- extra = min_t(u16, iter->size,
- DIV64_U64_ROUND_UP(iter->size * data_rate,
- iter->data_rate));
- iter->size -= extra;
- iter->data_rate -= data_rate;
- }
-
- /*
- * Keep ddb entry of all disabled planes explicitly zeroed
- * to avoid skl_ddb_add_affected_planes() adding them to
- * the state when other planes change their allocations.
- */
- size = wm->min_ddb_alloc + extra;
- if (size)
- iter->start = skl_ddb_entry_init(ddb, iter->start,
- iter->start + size);
-}
-
-static int
-skl_crtc_allocate_plane_ddb(struct intel_atomic_state *state,
- struct intel_crtc *crtc)
-{
- struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
- struct intel_crtc_state *crtc_state =
- intel_atomic_get_new_crtc_state(state, crtc);
- const struct intel_dbuf_state *dbuf_state =
- intel_atomic_get_new_dbuf_state(state);
- const struct skl_ddb_entry *alloc = &dbuf_state->ddb[crtc->pipe];
- int num_active = hweight8(dbuf_state->active_pipes);
- struct skl_plane_ddb_iter iter;
- enum plane_id plane_id;
- u16 cursor_size;
- u32 blocks;
- int level;
-
- /* Clear the partitioning for disabled planes. */
- memset(crtc_state->wm.skl.plane_ddb, 0, sizeof(crtc_state->wm.skl.plane_ddb));
- memset(crtc_state->wm.skl.plane_ddb_y, 0, sizeof(crtc_state->wm.skl.plane_ddb_y));
-
- if (!crtc_state->hw.active)
- return 0;
-
- iter.start = alloc->start;
- iter.size = skl_ddb_entry_size(alloc);
- if (iter.size == 0)
- return 0;
-
- /* Allocate fixed number of blocks for cursor. */
- cursor_size = skl_cursor_allocation(crtc_state, num_active);
- iter.size -= cursor_size;
- skl_ddb_entry_init(&crtc_state->wm.skl.plane_ddb[PLANE_CURSOR],
- alloc->end - cursor_size, alloc->end);
-
- iter.data_rate = skl_total_relative_data_rate(crtc_state);
-
- /*
- * Find the highest watermark level for which we can satisfy the block
- * requirement of active planes.
- */
- for (level = ilk_wm_max_level(dev_priv); level >= 0; level--) {
- blocks = 0;
- for_each_plane_id_on_crtc(crtc, plane_id) {
- const struct skl_plane_wm *wm =
- &crtc_state->wm.skl.optimal.planes[plane_id];
-
- if (plane_id == PLANE_CURSOR) {
- const struct skl_ddb_entry *ddb =
- &crtc_state->wm.skl.plane_ddb[plane_id];
-
- if (wm->wm[level].min_ddb_alloc > skl_ddb_entry_size(ddb)) {
- drm_WARN_ON(&dev_priv->drm,
- wm->wm[level].min_ddb_alloc != U16_MAX);
- blocks = U32_MAX;
- break;
- }
- continue;
- }
-
- blocks += wm->wm[level].min_ddb_alloc;
- blocks += wm->uv_wm[level].min_ddb_alloc;
- }
-
- if (blocks <= iter.size) {
- iter.size -= blocks;
- break;
- }
- }
-
- if (level < 0) {
- drm_dbg_kms(&dev_priv->drm,
- "Requested display configuration exceeds system DDB limitations");
- drm_dbg_kms(&dev_priv->drm, "minimum required %d/%d\n",
- blocks, iter.size);
- return -EINVAL;
- }
-
- /* avoid the WARN later when we don't allocate any extra DDB */
- if (iter.data_rate == 0)
- iter.size = 0;
-
- /*
- * Grant each plane the blocks it requires at the highest achievable
- * watermark level, plus an extra share of the leftover blocks
- * proportional to its relative data rate.
- */
- for_each_plane_id_on_crtc(crtc, plane_id) {
- struct skl_ddb_entry *ddb =
- &crtc_state->wm.skl.plane_ddb[plane_id];
- struct skl_ddb_entry *ddb_y =
- &crtc_state->wm.skl.plane_ddb_y[plane_id];
- const struct skl_plane_wm *wm =
- &crtc_state->wm.skl.optimal.planes[plane_id];
-
- if (plane_id == PLANE_CURSOR)
- continue;
-
- if (DISPLAY_VER(dev_priv) < 11 &&
- crtc_state->nv12_planes & BIT(plane_id)) {
- skl_allocate_plane_ddb(&iter, ddb_y, &wm->wm[level],
- crtc_state->rel_data_rate_y[plane_id]);
- skl_allocate_plane_ddb(&iter, ddb, &wm->uv_wm[level],
- crtc_state->rel_data_rate[plane_id]);
- } else {
- skl_allocate_plane_ddb(&iter, ddb, &wm->wm[level],
- crtc_state->rel_data_rate[plane_id]);
- }
- }
- drm_WARN_ON(&dev_priv->drm, iter.size != 0 || iter.data_rate != 0);
-
- /*
- * When we calculated watermark values we didn't know how high
- * of a level we'd actually be able to hit, so we just marked
- * all levels as "enabled." Go back now and disable the ones
- * that aren't actually possible.
- */
- for (level++; level <= ilk_wm_max_level(dev_priv); level++) {
- for_each_plane_id_on_crtc(crtc, plane_id) {
- const struct skl_ddb_entry *ddb =
- &crtc_state->wm.skl.plane_ddb[plane_id];
- const struct skl_ddb_entry *ddb_y =
- &crtc_state->wm.skl.plane_ddb_y[plane_id];
- struct skl_plane_wm *wm =
- &crtc_state->wm.skl.optimal.planes[plane_id];
-
- if (DISPLAY_VER(dev_priv) < 11 &&
- crtc_state->nv12_planes & BIT(plane_id))
- skl_check_nv12_wm_level(&wm->wm[level],
- &wm->uv_wm[level],
- ddb_y, ddb);
- else
- skl_check_wm_level(&wm->wm[level], ddb);
-
- if (icl_need_wm1_wa(dev_priv, plane_id) &&
- level == 1 && wm->wm[0].enable) {
- wm->wm[level].blocks = wm->wm[0].blocks;
- wm->wm[level].lines = wm->wm[0].lines;
- wm->wm[level].ignore_lines = wm->wm[0].ignore_lines;
- }
- }
- }
-
- /*
- * Go back and disable the transition and SAGV watermarks
- * if it turns out we don't have enough DDB blocks for them.
- */
- for_each_plane_id_on_crtc(crtc, plane_id) {
- const struct skl_ddb_entry *ddb =
- &crtc_state->wm.skl.plane_ddb[plane_id];
- const struct skl_ddb_entry *ddb_y =
- &crtc_state->wm.skl.plane_ddb_y[plane_id];
- struct skl_plane_wm *wm =
- &crtc_state->wm.skl.optimal.planes[plane_id];
-
- if (DISPLAY_VER(dev_priv) < 11 &&
- crtc_state->nv12_planes & BIT(plane_id)) {
- skl_check_wm_level(&wm->trans_wm, ddb_y);
- } else {
- WARN_ON(skl_ddb_entry_size(ddb_y));
-
- skl_check_wm_level(&wm->trans_wm, ddb);
- }
-
- skl_check_wm_level(&wm->sagv.wm0, ddb);
- skl_check_wm_level(&wm->sagv.trans_wm, ddb);
- }
-
- return 0;
-}
-
-/*
- * The max latency should be 257 (max the punit can code is 255 and we add 2us
- * for the read latency) and cpp should always be <= 8, so that
- * should allow pixel_rate up to ~2 GHz which seems sufficient since max
- * 2xcdclk is 1350 MHz and the pixel rate should never exceed that.
-*/
-static uint_fixed_16_16_t
-skl_wm_method1(const struct drm_i915_private *dev_priv, u32 pixel_rate,
- u8 cpp, u32 latency, u32 dbuf_block_size)
-{
- u32 wm_intermediate_val;
- uint_fixed_16_16_t ret;
-
- if (latency == 0)
- return FP_16_16_MAX;
-
- wm_intermediate_val = latency * pixel_rate * cpp;
- ret = div_fixed16(wm_intermediate_val, 1000 * dbuf_block_size);
-
- if (DISPLAY_VER(dev_priv) >= 10)
- ret = add_fixed16_u32(ret, 1);
-
- return ret;
-}
-
-static uint_fixed_16_16_t
-skl_wm_method2(u32 pixel_rate, u32 pipe_htotal, u32 latency,
- uint_fixed_16_16_t plane_blocks_per_line)
-{
- u32 wm_intermediate_val;
- uint_fixed_16_16_t ret;
-
- if (latency == 0)
- return FP_16_16_MAX;
-
- wm_intermediate_val = latency * pixel_rate;
- wm_intermediate_val = DIV_ROUND_UP(wm_intermediate_val,
- pipe_htotal * 1000);
- ret = mul_u32_fixed16(wm_intermediate_val, plane_blocks_per_line);
- return ret;
-}
-
-static uint_fixed_16_16_t
-intel_get_linetime_us(const struct intel_crtc_state *crtc_state)
-{
- struct drm_i915_private *dev_priv = to_i915(crtc_state->uapi.crtc->dev);
- u32 pixel_rate;
- u32 crtc_htotal;
- uint_fixed_16_16_t linetime_us;
-
- if (!crtc_state->hw.active)
- return u32_to_fixed16(0);
-
- pixel_rate = crtc_state->pixel_rate;
-
- if (drm_WARN_ON(&dev_priv->drm, pixel_rate == 0))
- return u32_to_fixed16(0);
-
- crtc_htotal = crtc_state->hw.pipe_mode.crtc_htotal;
- linetime_us = div_fixed16(crtc_htotal * 1000, pixel_rate);
-
- return linetime_us;
-}
-
-static int
-skl_compute_wm_params(const struct intel_crtc_state *crtc_state,
- int width, const struct drm_format_info *format,
- u64 modifier, unsigned int rotation,
- u32 plane_pixel_rate, struct skl_wm_params *wp,
- int color_plane)
-{
- struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
- struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
- u32 interm_pbpl;
-
- /* only planar format has two planes */
- if (color_plane == 1 &&
- !intel_format_info_is_yuv_semiplanar(format, modifier)) {
- drm_dbg_kms(&dev_priv->drm,
- "Non planar format have single plane\n");
- return -EINVAL;
- }
-
- wp->y_tiled = modifier == I915_FORMAT_MOD_Y_TILED ||
- modifier == I915_FORMAT_MOD_4_TILED ||
- modifier == I915_FORMAT_MOD_Yf_TILED ||
- modifier == I915_FORMAT_MOD_Y_TILED_CCS ||
- modifier == I915_FORMAT_MOD_Yf_TILED_CCS;
- wp->x_tiled = modifier == I915_FORMAT_MOD_X_TILED;
- wp->rc_surface = modifier == I915_FORMAT_MOD_Y_TILED_CCS ||
- modifier == I915_FORMAT_MOD_Yf_TILED_CCS;
- wp->is_planar = intel_format_info_is_yuv_semiplanar(format, modifier);
-
- wp->width = width;
- if (color_plane == 1 && wp->is_planar)
- wp->width /= 2;
-
- wp->cpp = format->cpp[color_plane];
- wp->plane_pixel_rate = plane_pixel_rate;
-
- if (DISPLAY_VER(dev_priv) >= 11 &&
- modifier == I915_FORMAT_MOD_Yf_TILED && wp->cpp == 1)
- wp->dbuf_block_size = 256;
- else
- wp->dbuf_block_size = 512;
-
- if (drm_rotation_90_or_270(rotation)) {
- switch (wp->cpp) {
- case 1:
- wp->y_min_scanlines = 16;
- break;
- case 2:
- wp->y_min_scanlines = 8;
- break;
- case 4:
- wp->y_min_scanlines = 4;
- break;
- default:
- MISSING_CASE(wp->cpp);
- return -EINVAL;
- }
- } else {
- wp->y_min_scanlines = 4;
- }
-
- if (skl_needs_memory_bw_wa(dev_priv))
- wp->y_min_scanlines *= 2;
-
- wp->plane_bytes_per_line = wp->width * wp->cpp;
- if (wp->y_tiled) {
- interm_pbpl = DIV_ROUND_UP(wp->plane_bytes_per_line *
- wp->y_min_scanlines,
- wp->dbuf_block_size);
-
- if (DISPLAY_VER(dev_priv) >= 10)
- interm_pbpl++;
-
- wp->plane_blocks_per_line = div_fixed16(interm_pbpl,
- wp->y_min_scanlines);
- } else {
- interm_pbpl = DIV_ROUND_UP(wp->plane_bytes_per_line,
- wp->dbuf_block_size);
-
- if (!wp->x_tiled || DISPLAY_VER(dev_priv) >= 10)
- interm_pbpl++;
-
- wp->plane_blocks_per_line = u32_to_fixed16(interm_pbpl);
- }
-
- wp->y_tile_minimum = mul_u32_fixed16(wp->y_min_scanlines,
- wp->plane_blocks_per_line);
-
- wp->linetime_us = fixed16_to_u32_round_up(
- intel_get_linetime_us(crtc_state));
-
- return 0;
-}
-
-static int
-skl_compute_plane_wm_params(const struct intel_crtc_state *crtc_state,
- const struct intel_plane_state *plane_state,
- struct skl_wm_params *wp, int color_plane)
-{
- const struct drm_framebuffer *fb = plane_state->hw.fb;
- int width;
-
- /*
- * Src coordinates are already rotated by 270 degrees for
- * the 90/270 degree plane rotation cases (to match the
- * GTT mapping), hence no need to account for rotation here.
- */
- width = drm_rect_width(&plane_state->uapi.src) >> 16;
-
- return skl_compute_wm_params(crtc_state, width,
- fb->format, fb->modifier,
- plane_state->hw.rotation,
- intel_plane_pixel_rate(crtc_state, plane_state),
- wp, color_plane);
-}
-
-static bool skl_wm_has_lines(struct drm_i915_private *dev_priv, int level)
-{
- if (DISPLAY_VER(dev_priv) >= 10)
- return true;
-
- /* The number of lines are ignored for the level 0 watermark. */
- return level > 0;
-}
-
-static int skl_wm_max_lines(struct drm_i915_private *dev_priv)
-{
- if (DISPLAY_VER(dev_priv) >= 13)
- return 255;
- else
- return 31;
-}
-
-static void skl_compute_plane_wm(const struct intel_crtc_state *crtc_state,
- struct intel_plane *plane,
- int level,
- unsigned int latency,
- const struct skl_wm_params *wp,
- const struct skl_wm_level *result_prev,
- struct skl_wm_level *result /* out */)
-{
- struct drm_i915_private *dev_priv = to_i915(crtc_state->uapi.crtc->dev);
- uint_fixed_16_16_t method1, method2;
- uint_fixed_16_16_t selected_result;
- u32 blocks, lines, min_ddb_alloc = 0;
-
- if (latency == 0 ||
- (use_minimal_wm0_only(crtc_state, plane) && level > 0)) {
- /* reject it */
- result->min_ddb_alloc = U16_MAX;
- return;
- }
-
- /*
- * WaIncreaseLatencyIPCEnabled: kbl,cfl
- * Display WA #1141: kbl,cfl
- */
- if ((IS_KABYLAKE(dev_priv) ||
- IS_COFFEELAKE(dev_priv) ||
- IS_COMETLAKE(dev_priv)) &&
- dev_priv->ipc_enabled)
- latency += 4;
-
- if (skl_needs_memory_bw_wa(dev_priv) && wp->x_tiled)
- latency += 15;
-
- method1 = skl_wm_method1(dev_priv, wp->plane_pixel_rate,
- wp->cpp, latency, wp->dbuf_block_size);
- method2 = skl_wm_method2(wp->plane_pixel_rate,
- crtc_state->hw.pipe_mode.crtc_htotal,
- latency,
- wp->plane_blocks_per_line);
-
- if (wp->y_tiled) {
- selected_result = max_fixed16(method2, wp->y_tile_minimum);
- } else {
- if ((wp->cpp * crtc_state->hw.pipe_mode.crtc_htotal /
- wp->dbuf_block_size < 1) &&
- (wp->plane_bytes_per_line / wp->dbuf_block_size < 1)) {
- selected_result = method2;
- } else if (latency >= wp->linetime_us) {
- if (DISPLAY_VER(dev_priv) == 9)
- selected_result = min_fixed16(method1, method2);
- else
- selected_result = method2;
- } else {
- selected_result = method1;
- }
- }
-
- blocks = fixed16_to_u32_round_up(selected_result) + 1;
- /*
- * Lets have blocks at minimum equivalent to plane_blocks_per_line
- * as there will be at minimum one line for lines configuration. This
- * is a work around for FIFO underruns observed with resolutions like
- * 4k 60 Hz in single channel DRAM configurations.
- *
- * As per the Bspec 49325, if the ddb allocation can hold at least
- * one plane_blocks_per_line, we should have selected method2 in
- * the above logic. Assuming that modern versions have enough dbuf
- * and method2 guarantees blocks equivalent to at least 1 line,
- * select the blocks as plane_blocks_per_line.
- *
- * TODO: Revisit the logic when we have better understanding on DRAM
- * channels' impact on the level 0 memory latency and the relevant
- * wm calculations.
- */
- if (skl_wm_has_lines(dev_priv, level))
- blocks = max(blocks,
- fixed16_to_u32_round_up(wp->plane_blocks_per_line));
- lines = div_round_up_fixed16(selected_result,
- wp->plane_blocks_per_line);
-
- if (DISPLAY_VER(dev_priv) == 9) {
- /* Display WA #1125: skl,bxt,kbl */
- if (level == 0 && wp->rc_surface)
- blocks += fixed16_to_u32_round_up(wp->y_tile_minimum);
-
- /* Display WA #1126: skl,bxt,kbl */
- if (level >= 1 && level <= 7) {
- if (wp->y_tiled) {
- blocks += fixed16_to_u32_round_up(wp->y_tile_minimum);
- lines += wp->y_min_scanlines;
- } else {
- blocks++;
- }
-
- /*
- * Make sure result blocks for higher latency levels are
- * atleast as high as level below the current level.
- * Assumption in DDB algorithm optimization for special
- * cases. Also covers Display WA #1125 for RC.
- */
- if (result_prev->blocks > blocks)
- blocks = result_prev->blocks;
- }
- }
-
- if (DISPLAY_VER(dev_priv) >= 11) {
- if (wp->y_tiled) {
- int extra_lines;
-
- if (lines % wp->y_min_scanlines == 0)
- extra_lines = wp->y_min_scanlines;
- else
- extra_lines = wp->y_min_scanlines * 2 -
- lines % wp->y_min_scanlines;
-
- min_ddb_alloc = mul_round_up_u32_fixed16(lines + extra_lines,
- wp->plane_blocks_per_line);
- } else {
- min_ddb_alloc = blocks + DIV_ROUND_UP(blocks, 10);
- }
- }
-
- if (!skl_wm_has_lines(dev_priv, level))
- lines = 0;
-
- if (lines > skl_wm_max_lines(dev_priv)) {
- /* reject it */
- result->min_ddb_alloc = U16_MAX;
- return;
- }
-
- /*
- * If lines is valid, assume we can use this watermark level
- * for now. We'll come back and disable it after we calculate the
- * DDB allocation if it turns out we don't actually have enough
- * blocks to satisfy it.
- */
- result->blocks = blocks;
- result->lines = lines;
- /* Bspec says: value >= plane ddb allocation -> invalid, hence the +1 here */
- result->min_ddb_alloc = max(min_ddb_alloc, blocks) + 1;
- result->enable = true;
-
- if (DISPLAY_VER(dev_priv) < 12 && dev_priv->display.sagv.block_time_us)
- result->can_sagv = latency >= dev_priv->display.sagv.block_time_us;
-}
-
-static void
-skl_compute_wm_levels(const struct intel_crtc_state *crtc_state,
- struct intel_plane *plane,
- const struct skl_wm_params *wm_params,
- struct skl_wm_level *levels)
-{
- struct drm_i915_private *dev_priv = to_i915(crtc_state->uapi.crtc->dev);
- int level, max_level = ilk_wm_max_level(dev_priv);
- struct skl_wm_level *result_prev = &levels[0];
-
- for (level = 0; level <= max_level; level++) {
- struct skl_wm_level *result = &levels[level];
- unsigned int latency = dev_priv->display.wm.skl_latency[level];
-
- skl_compute_plane_wm(crtc_state, plane, level, latency,
- wm_params, result_prev, result);
-
- result_prev = result;
- }
-}
-
-static void tgl_compute_sagv_wm(const struct intel_crtc_state *crtc_state,
- struct intel_plane *plane,
- const struct skl_wm_params *wm_params,
- struct skl_plane_wm *plane_wm)
-{
- struct drm_i915_private *dev_priv = to_i915(crtc_state->uapi.crtc->dev);
- struct skl_wm_level *sagv_wm = &plane_wm->sagv.wm0;
- struct skl_wm_level *levels = plane_wm->wm;
- unsigned int latency = 0;
-
- if (dev_priv->display.sagv.block_time_us)
- latency = dev_priv->display.sagv.block_time_us + dev_priv->display.wm.skl_latency[0];
-
- skl_compute_plane_wm(crtc_state, plane, 0, latency,
- wm_params, &levels[0],
- sagv_wm);
-}
-
-static void skl_compute_transition_wm(struct drm_i915_private *dev_priv,
- struct skl_wm_level *trans_wm,
- const struct skl_wm_level *wm0,
- const struct skl_wm_params *wp)
-{
- u16 trans_min, trans_amount, trans_y_tile_min;
- u16 wm0_blocks, trans_offset, blocks;
-
- /* Transition WM don't make any sense if ipc is disabled */
- if (!dev_priv->ipc_enabled)
- return;
-
- /*
- * WaDisableTWM:skl,kbl,cfl,bxt
- * Transition WM are not recommended by HW team for GEN9
- */
- if (DISPLAY_VER(dev_priv) == 9)
- return;
-
- if (DISPLAY_VER(dev_priv) >= 11)
- trans_min = 4;
- else
- trans_min = 14;
-
- /* Display WA #1140: glk,cnl */
- if (DISPLAY_VER(dev_priv) == 10)
- trans_amount = 0;
- else
- trans_amount = 10; /* This is configurable amount */
-
- trans_offset = trans_min + trans_amount;
-
- /*
- * The spec asks for Selected Result Blocks for wm0 (the real value),
- * not Result Blocks (the integer value). Pay attention to the capital
- * letters. The value wm_l0->blocks is actually Result Blocks, but
- * since Result Blocks is the ceiling of Selected Result Blocks plus 1,
- * and since we later will have to get the ceiling of the sum in the
- * transition watermarks calculation, we can just pretend Selected
- * Result Blocks is Result Blocks minus 1 and it should work for the
- * current platforms.
- */
- wm0_blocks = wm0->blocks - 1;
-
- if (wp->y_tiled) {
- trans_y_tile_min =
- (u16)mul_round_up_u32_fixed16(2, wp->y_tile_minimum);
- blocks = max(wm0_blocks, trans_y_tile_min) + trans_offset;
- } else {
- blocks = wm0_blocks + trans_offset;
- }
- blocks++;
-
- /*
- * Just assume we can enable the transition watermark. After
- * computing the DDB we'll come back and disable it if that
- * assumption turns out to be false.
- */
- trans_wm->blocks = blocks;
- trans_wm->min_ddb_alloc = max_t(u16, wm0->min_ddb_alloc, blocks + 1);
- trans_wm->enable = true;
-}
-
-static int skl_build_plane_wm_single(struct intel_crtc_state *crtc_state,
- const struct intel_plane_state *plane_state,
- struct intel_plane *plane, int color_plane)
-{
- struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
- struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
- struct skl_plane_wm *wm = &crtc_state->wm.skl.raw.planes[plane->id];
- struct skl_wm_params wm_params;
- int ret;
-
- ret = skl_compute_plane_wm_params(crtc_state, plane_state,
- &wm_params, color_plane);
- if (ret)
- return ret;
-
- skl_compute_wm_levels(crtc_state, plane, &wm_params, wm->wm);
-
- skl_compute_transition_wm(dev_priv, &wm->trans_wm,
- &wm->wm[0], &wm_params);
-
- if (DISPLAY_VER(dev_priv) >= 12) {
- tgl_compute_sagv_wm(crtc_state, plane, &wm_params, wm);
-
- skl_compute_transition_wm(dev_priv, &wm->sagv.trans_wm,
- &wm->sagv.wm0, &wm_params);
- }
-
- return 0;
-}
-
-static int skl_build_plane_wm_uv(struct intel_crtc_state *crtc_state,
- const struct intel_plane_state *plane_state,
- struct intel_plane *plane)
-{
- struct skl_plane_wm *wm = &crtc_state->wm.skl.raw.planes[plane->id];
- struct skl_wm_params wm_params;
- int ret;
-
- wm->is_planar = true;
-
- /* uv plane watermarks must also be validated for NV12/Planar */
- ret = skl_compute_plane_wm_params(crtc_state, plane_state,
- &wm_params, 1);
- if (ret)
- return ret;
-
- skl_compute_wm_levels(crtc_state, plane, &wm_params, wm->uv_wm);
-
- return 0;
-}
-
-static int skl_build_plane_wm(struct intel_crtc_state *crtc_state,
- const struct intel_plane_state *plane_state)
-{
- struct intel_plane *plane = to_intel_plane(plane_state->uapi.plane);
- enum plane_id plane_id = plane->id;
- struct skl_plane_wm *wm = &crtc_state->wm.skl.raw.planes[plane_id];
- const struct drm_framebuffer *fb = plane_state->hw.fb;
- int ret;
-
- memset(wm, 0, sizeof(*wm));
-
- if (!intel_wm_plane_visible(crtc_state, plane_state))
- return 0;
-
- ret = skl_build_plane_wm_single(crtc_state, plane_state,
- plane, 0);
- if (ret)
- return ret;
-
- if (fb->format->is_yuv && fb->format->num_planes > 1) {
- ret = skl_build_plane_wm_uv(crtc_state, plane_state,
- plane);
- if (ret)
- return ret;
- }
-
- return 0;
-}
-
-static int icl_build_plane_wm(struct intel_crtc_state *crtc_state,
- const struct intel_plane_state *plane_state)
-{
- struct intel_plane *plane = to_intel_plane(plane_state->uapi.plane);
- struct drm_i915_private *dev_priv = to_i915(plane->base.dev);
- enum plane_id plane_id = plane->id;
- struct skl_plane_wm *wm = &crtc_state->wm.skl.raw.planes[plane_id];
- int ret;
-
- /* Watermarks calculated in master */
- if (plane_state->planar_slave)
- return 0;
-
- memset(wm, 0, sizeof(*wm));
-
- if (plane_state->planar_linked_plane) {
- const struct drm_framebuffer *fb = plane_state->hw.fb;
-
- drm_WARN_ON(&dev_priv->drm,
- !intel_wm_plane_visible(crtc_state, plane_state));
- drm_WARN_ON(&dev_priv->drm, !fb->format->is_yuv ||
- fb->format->num_planes == 1);
-
- ret = skl_build_plane_wm_single(crtc_state, plane_state,
- plane_state->planar_linked_plane, 0);
- if (ret)
- return ret;
-
- ret = skl_build_plane_wm_single(crtc_state, plane_state,
- plane, 1);
- if (ret)
- return ret;
- } else if (intel_wm_plane_visible(crtc_state, plane_state)) {
- ret = skl_build_plane_wm_single(crtc_state, plane_state,
- plane, 0);
- if (ret)
- return ret;
- }
-
- return 0;
-}
-
-static int skl_build_pipe_wm(struct intel_atomic_state *state,
- struct intel_crtc *crtc)
-{
- struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
- struct intel_crtc_state *crtc_state =
- intel_atomic_get_new_crtc_state(state, crtc);
- const struct intel_plane_state *plane_state;
- struct intel_plane *plane;
- int ret, i;
-
- for_each_new_intel_plane_in_state(state, plane, plane_state, i) {
- /*
- * FIXME should perhaps check {old,new}_plane_crtc->hw.crtc
- * instead but we don't populate that correctly for NV12 Y
- * planes so for now hack this.
- */
- if (plane->pipe != crtc->pipe)
- continue;
-
- if (DISPLAY_VER(dev_priv) >= 11)
- ret = icl_build_plane_wm(crtc_state, plane_state);
- else
- ret = skl_build_plane_wm(crtc_state, plane_state);
- if (ret)
- return ret;
- }
-
- crtc_state->wm.skl.optimal = crtc_state->wm.skl.raw;
-
- return 0;
-}
-
-static void skl_ddb_entry_write(struct drm_i915_private *dev_priv,
- i915_reg_t reg,
- const struct skl_ddb_entry *entry)
-{
- if (entry->end)
- intel_de_write_fw(dev_priv, reg,
- PLANE_BUF_END(entry->end - 1) |
- PLANE_BUF_START(entry->start));
- else
- intel_de_write_fw(dev_priv, reg, 0);
-}
-
-static void skl_write_wm_level(struct drm_i915_private *dev_priv,
- i915_reg_t reg,
- const struct skl_wm_level *level)
-{
- u32 val = 0;
-
- if (level->enable)
- val |= PLANE_WM_EN;
- if (level->ignore_lines)
- val |= PLANE_WM_IGNORE_LINES;
- val |= REG_FIELD_PREP(PLANE_WM_BLOCKS_MASK, level->blocks);
- val |= REG_FIELD_PREP(PLANE_WM_LINES_MASK, level->lines);
-
- intel_de_write_fw(dev_priv, reg, val);
-}
-
-void skl_write_plane_wm(struct intel_plane *plane,
- const struct intel_crtc_state *crtc_state)
-{
- struct drm_i915_private *dev_priv = to_i915(plane->base.dev);
- int level, max_level = ilk_wm_max_level(dev_priv);
- enum plane_id plane_id = plane->id;
- enum pipe pipe = plane->pipe;
- const struct skl_pipe_wm *pipe_wm = &crtc_state->wm.skl.optimal;
- const struct skl_ddb_entry *ddb =
- &crtc_state->wm.skl.plane_ddb[plane_id];
- const struct skl_ddb_entry *ddb_y =
- &crtc_state->wm.skl.plane_ddb_y[plane_id];
-
- for (level = 0; level <= max_level; level++)
- skl_write_wm_level(dev_priv, PLANE_WM(pipe, plane_id, level),
- skl_plane_wm_level(pipe_wm, plane_id, level));
-
- skl_write_wm_level(dev_priv, PLANE_WM_TRANS(pipe, plane_id),
- skl_plane_trans_wm(pipe_wm, plane_id));
-
- if (HAS_HW_SAGV_WM(dev_priv)) {
- const struct skl_plane_wm *wm = &pipe_wm->planes[plane_id];
-
- skl_write_wm_level(dev_priv, PLANE_WM_SAGV(pipe, plane_id),
- &wm->sagv.wm0);
- skl_write_wm_level(dev_priv, PLANE_WM_SAGV_TRANS(pipe, plane_id),
- &wm->sagv.trans_wm);
- }
-
- skl_ddb_entry_write(dev_priv,
- PLANE_BUF_CFG(pipe, plane_id), ddb);
-
- if (DISPLAY_VER(dev_priv) < 11)
- skl_ddb_entry_write(dev_priv,
- PLANE_NV12_BUF_CFG(pipe, plane_id), ddb_y);
-}
-
-void skl_write_cursor_wm(struct intel_plane *plane,
- const struct intel_crtc_state *crtc_state)
-{
- struct drm_i915_private *dev_priv = to_i915(plane->base.dev);
- int level, max_level = ilk_wm_max_level(dev_priv);
- enum plane_id plane_id = plane->id;
- enum pipe pipe = plane->pipe;
- const struct skl_pipe_wm *pipe_wm = &crtc_state->wm.skl.optimal;
- const struct skl_ddb_entry *ddb =
- &crtc_state->wm.skl.plane_ddb[plane_id];
-
- for (level = 0; level <= max_level; level++)
- skl_write_wm_level(dev_priv, CUR_WM(pipe, level),
- skl_plane_wm_level(pipe_wm, plane_id, level));
-
- skl_write_wm_level(dev_priv, CUR_WM_TRANS(pipe),
- skl_plane_trans_wm(pipe_wm, plane_id));
-
- if (HAS_HW_SAGV_WM(dev_priv)) {
- const struct skl_plane_wm *wm = &pipe_wm->planes[plane_id];
-
- skl_write_wm_level(dev_priv, CUR_WM_SAGV(pipe),
- &wm->sagv.wm0);
- skl_write_wm_level(dev_priv, CUR_WM_SAGV_TRANS(pipe),
- &wm->sagv.trans_wm);
- }
-
- skl_ddb_entry_write(dev_priv, CUR_BUF_CFG(pipe), ddb);
-}
-
-static bool skl_wm_level_equals(const struct skl_wm_level *l1,
- const struct skl_wm_level *l2)
-{
- return l1->enable == l2->enable &&
- l1->ignore_lines == l2->ignore_lines &&
- l1->lines == l2->lines &&
- l1->blocks == l2->blocks;
-}
-
-static bool skl_plane_wm_equals(struct drm_i915_private *dev_priv,
- const struct skl_plane_wm *wm1,
- const struct skl_plane_wm *wm2)
-{
- int level, max_level = ilk_wm_max_level(dev_priv);
-
- for (level = 0; level <= max_level; level++) {
- /*
- * We don't check uv_wm as the hardware doesn't actually
- * use it. It only gets used for calculating the required
- * ddb allocation.
- */
- if (!skl_wm_level_equals(&wm1->wm[level], &wm2->wm[level]))
- return false;
- }
-
- return skl_wm_level_equals(&wm1->trans_wm, &wm2->trans_wm) &&
- skl_wm_level_equals(&wm1->sagv.wm0, &wm2->sagv.wm0) &&
- skl_wm_level_equals(&wm1->sagv.trans_wm, &wm2->sagv.trans_wm);
-}
-
-static bool skl_ddb_entries_overlap(const struct skl_ddb_entry *a,
- const struct skl_ddb_entry *b)
-{
- return a->start < b->end && b->start < a->end;
-}
-
-static void skl_ddb_entry_union(struct skl_ddb_entry *a,
- const struct skl_ddb_entry *b)
-{
- if (a->end && b->end) {
- a->start = min(a->start, b->start);
- a->end = max(a->end, b->end);
- } else if (b->end) {
- a->start = b->start;
- a->end = b->end;
- }
-}
-
-bool skl_ddb_allocation_overlaps(const struct skl_ddb_entry *ddb,
- const struct skl_ddb_entry *entries,
- int num_entries, int ignore_idx)
-{
- int i;
-
- for (i = 0; i < num_entries; i++) {
- if (i != ignore_idx &&
- skl_ddb_entries_overlap(ddb, &entries[i]))
- return true;
- }
-
- return false;
-}
-
-static int
-skl_ddb_add_affected_planes(const struct intel_crtc_state *old_crtc_state,
- struct intel_crtc_state *new_crtc_state)
-{
- struct intel_atomic_state *state = to_intel_atomic_state(new_crtc_state->uapi.state);
- struct intel_crtc *crtc = to_intel_crtc(new_crtc_state->uapi.crtc);
- struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
- struct intel_plane *plane;
-
- for_each_intel_plane_on_crtc(&dev_priv->drm, crtc, plane) {
- struct intel_plane_state *plane_state;
- enum plane_id plane_id = plane->id;
-
- if (skl_ddb_entry_equal(&old_crtc_state->wm.skl.plane_ddb[plane_id],
- &new_crtc_state->wm.skl.plane_ddb[plane_id]) &&
- skl_ddb_entry_equal(&old_crtc_state->wm.skl.plane_ddb_y[plane_id],
- &new_crtc_state->wm.skl.plane_ddb_y[plane_id]))
- continue;
-
- plane_state = intel_atomic_get_plane_state(state, plane);
- if (IS_ERR(plane_state))
- return PTR_ERR(plane_state);
-
- new_crtc_state->update_planes |= BIT(plane_id);
- }
-
- return 0;
-}
-
-static u8 intel_dbuf_enabled_slices(const struct intel_dbuf_state *dbuf_state)
-{
- struct drm_i915_private *dev_priv = to_i915(dbuf_state->base.state->base.dev);
- u8 enabled_slices;
- enum pipe pipe;
-
- /*
- * FIXME: For now we always enable slice S1 as per
- * the Bspec display initialization sequence.
- */
- enabled_slices = BIT(DBUF_S1);
-
- for_each_pipe(dev_priv, pipe)
- enabled_slices |= dbuf_state->slices[pipe];
-
- return enabled_slices;
-}
-
-static int
-skl_compute_ddb(struct intel_atomic_state *state)
-{
- struct drm_i915_private *dev_priv = to_i915(state->base.dev);
- const struct intel_dbuf_state *old_dbuf_state;
- struct intel_dbuf_state *new_dbuf_state = NULL;
- const struct intel_crtc_state *old_crtc_state;
- struct intel_crtc_state *new_crtc_state;
- struct intel_crtc *crtc;
- int ret, i;
-
- for_each_new_intel_crtc_in_state(state, crtc, new_crtc_state, i) {
- new_dbuf_state = intel_atomic_get_dbuf_state(state);
- if (IS_ERR(new_dbuf_state))
- return PTR_ERR(new_dbuf_state);
-
- old_dbuf_state = intel_atomic_get_old_dbuf_state(state);
- break;
- }
-
- if (!new_dbuf_state)
- return 0;
-
- new_dbuf_state->active_pipes =
- intel_calc_active_pipes(state, old_dbuf_state->active_pipes);
-
- if (old_dbuf_state->active_pipes != new_dbuf_state->active_pipes) {
- ret = intel_atomic_lock_global_state(&new_dbuf_state->base);
- if (ret)
- return ret;
- }
-
- if (HAS_MBUS_JOINING(dev_priv))
- new_dbuf_state->joined_mbus =
- adlp_check_mbus_joined(new_dbuf_state->active_pipes);
-
- for_each_intel_crtc(&dev_priv->drm, crtc) {
- enum pipe pipe = crtc->pipe;
-
- new_dbuf_state->slices[pipe] =
- skl_compute_dbuf_slices(crtc, new_dbuf_state->active_pipes,
- new_dbuf_state->joined_mbus);
-
- if (old_dbuf_state->slices[pipe] == new_dbuf_state->slices[pipe])
- continue;
-
- ret = intel_atomic_lock_global_state(&new_dbuf_state->base);
- if (ret)
- return ret;
- }
-
- new_dbuf_state->enabled_slices = intel_dbuf_enabled_slices(new_dbuf_state);
-
- if (old_dbuf_state->enabled_slices != new_dbuf_state->enabled_slices ||
- old_dbuf_state->joined_mbus != new_dbuf_state->joined_mbus) {
- ret = intel_atomic_serialize_global_state(&new_dbuf_state->base);
- if (ret)
- return ret;
-
- if (old_dbuf_state->joined_mbus != new_dbuf_state->joined_mbus) {
- /* TODO: Implement vblank synchronized MBUS joining changes */
- ret = intel_modeset_all_pipes(state);
- if (ret)
- return ret;
- }
-
- drm_dbg_kms(&dev_priv->drm,
- "Enabled dbuf slices 0x%x -> 0x%x (total dbuf slices 0x%x), mbus joined? %s->%s\n",
- old_dbuf_state->enabled_slices,
- new_dbuf_state->enabled_slices,
- INTEL_INFO(dev_priv)->display.dbuf.slice_mask,
- str_yes_no(old_dbuf_state->joined_mbus),
- str_yes_no(new_dbuf_state->joined_mbus));
- }
-
- for_each_new_intel_crtc_in_state(state, crtc, new_crtc_state, i) {
- enum pipe pipe = crtc->pipe;
-
- new_dbuf_state->weight[pipe] = intel_crtc_ddb_weight(new_crtc_state);
-
- if (old_dbuf_state->weight[pipe] == new_dbuf_state->weight[pipe])
- continue;
-
- ret = intel_atomic_lock_global_state(&new_dbuf_state->base);
- if (ret)
- return ret;
- }
-
- for_each_intel_crtc(&dev_priv->drm, crtc) {
- ret = skl_crtc_allocate_ddb(state, crtc);
- if (ret)
- return ret;
- }
-
- for_each_oldnew_intel_crtc_in_state(state, crtc, old_crtc_state,
- new_crtc_state, i) {
- ret = skl_crtc_allocate_plane_ddb(state, crtc);
- if (ret)
- return ret;
-
- ret = skl_ddb_add_affected_planes(old_crtc_state,
- new_crtc_state);
- if (ret)
- return ret;
- }
-
- return 0;
-}
-
-static char enast(bool enable)
-{
- return enable ? '*' : ' ';
-}
-
-static void
-skl_print_wm_changes(struct intel_atomic_state *state)
-{
- struct drm_i915_private *dev_priv = to_i915(state->base.dev);
- const struct intel_crtc_state *old_crtc_state;
- const struct intel_crtc_state *new_crtc_state;
- struct intel_plane *plane;
- struct intel_crtc *crtc;
- int i;
-
- if (!drm_debug_enabled(DRM_UT_KMS))
- return;
-
- for_each_oldnew_intel_crtc_in_state(state, crtc, old_crtc_state,
- new_crtc_state, i) {
- const struct skl_pipe_wm *old_pipe_wm, *new_pipe_wm;
-
- old_pipe_wm = &old_crtc_state->wm.skl.optimal;
- new_pipe_wm = &new_crtc_state->wm.skl.optimal;
-
- for_each_intel_plane_on_crtc(&dev_priv->drm, crtc, plane) {
- enum plane_id plane_id = plane->id;
- const struct skl_ddb_entry *old, *new;
-
- old = &old_crtc_state->wm.skl.plane_ddb[plane_id];
- new = &new_crtc_state->wm.skl.plane_ddb[plane_id];
-
- if (skl_ddb_entry_equal(old, new))
- continue;
-
- drm_dbg_kms(&dev_priv->drm,
- "[PLANE:%d:%s] ddb (%4d - %4d) -> (%4d - %4d), size %4d -> %4d\n",
- plane->base.base.id, plane->base.name,
- old->start, old->end, new->start, new->end,
- skl_ddb_entry_size(old), skl_ddb_entry_size(new));
- }
-
- for_each_intel_plane_on_crtc(&dev_priv->drm, crtc, plane) {
- enum plane_id plane_id = plane->id;
- const struct skl_plane_wm *old_wm, *new_wm;
-
- old_wm = &old_pipe_wm->planes[plane_id];
- new_wm = &new_pipe_wm->planes[plane_id];
-
- if (skl_plane_wm_equals(dev_priv, old_wm, new_wm))
- continue;
-
- drm_dbg_kms(&dev_priv->drm,
- "[PLANE:%d:%s] level %cwm0,%cwm1,%cwm2,%cwm3,%cwm4,%cwm5,%cwm6,%cwm7,%ctwm,%cswm,%cstwm"
- " -> %cwm0,%cwm1,%cwm2,%cwm3,%cwm4,%cwm5,%cwm6,%cwm7,%ctwm,%cswm,%cstwm\n",
- plane->base.base.id, plane->base.name,
- enast(old_wm->wm[0].enable), enast(old_wm->wm[1].enable),
- enast(old_wm->wm[2].enable), enast(old_wm->wm[3].enable),
- enast(old_wm->wm[4].enable), enast(old_wm->wm[5].enable),
- enast(old_wm->wm[6].enable), enast(old_wm->wm[7].enable),
- enast(old_wm->trans_wm.enable),
- enast(old_wm->sagv.wm0.enable),
- enast(old_wm->sagv.trans_wm.enable),
- enast(new_wm->wm[0].enable), enast(new_wm->wm[1].enable),
- enast(new_wm->wm[2].enable), enast(new_wm->wm[3].enable),
- enast(new_wm->wm[4].enable), enast(new_wm->wm[5].enable),
- enast(new_wm->wm[6].enable), enast(new_wm->wm[7].enable),
- enast(new_wm->trans_wm.enable),
- enast(new_wm->sagv.wm0.enable),
- enast(new_wm->sagv.trans_wm.enable));
-
- drm_dbg_kms(&dev_priv->drm,
- "[PLANE:%d:%s] lines %c%3d,%c%3d,%c%3d,%c%3d,%c%3d,%c%3d,%c%3d,%c%3d,%c%3d,%c%3d,%c%4d"
- " -> %c%3d,%c%3d,%c%3d,%c%3d,%c%3d,%c%3d,%c%3d,%c%3d,%c%3d,%c%3d,%c%4d\n",
- plane->base.base.id, plane->base.name,
- enast(old_wm->wm[0].ignore_lines), old_wm->wm[0].lines,
- enast(old_wm->wm[1].ignore_lines), old_wm->wm[1].lines,
- enast(old_wm->wm[2].ignore_lines), old_wm->wm[2].lines,
- enast(old_wm->wm[3].ignore_lines), old_wm->wm[3].lines,
- enast(old_wm->wm[4].ignore_lines), old_wm->wm[4].lines,
- enast(old_wm->wm[5].ignore_lines), old_wm->wm[5].lines,
- enast(old_wm->wm[6].ignore_lines), old_wm->wm[6].lines,
- enast(old_wm->wm[7].ignore_lines), old_wm->wm[7].lines,
- enast(old_wm->trans_wm.ignore_lines), old_wm->trans_wm.lines,
- enast(old_wm->sagv.wm0.ignore_lines), old_wm->sagv.wm0.lines,
- enast(old_wm->sagv.trans_wm.ignore_lines), old_wm->sagv.trans_wm.lines,
- enast(new_wm->wm[0].ignore_lines), new_wm->wm[0].lines,
- enast(new_wm->wm[1].ignore_lines), new_wm->wm[1].lines,
- enast(new_wm->wm[2].ignore_lines), new_wm->wm[2].lines,
- enast(new_wm->wm[3].ignore_lines), new_wm->wm[3].lines,
- enast(new_wm->wm[4].ignore_lines), new_wm->wm[4].lines,
- enast(new_wm->wm[5].ignore_lines), new_wm->wm[5].lines,
- enast(new_wm->wm[6].ignore_lines), new_wm->wm[6].lines,
- enast(new_wm->wm[7].ignore_lines), new_wm->wm[7].lines,
- enast(new_wm->trans_wm.ignore_lines), new_wm->trans_wm.lines,
- enast(new_wm->sagv.wm0.ignore_lines), new_wm->sagv.wm0.lines,
- enast(new_wm->sagv.trans_wm.ignore_lines), new_wm->sagv.trans_wm.lines);
-
- drm_dbg_kms(&dev_priv->drm,
- "[PLANE:%d:%s] blocks %4d,%4d,%4d,%4d,%4d,%4d,%4d,%4d,%4d,%4d,%5d"
- " -> %4d,%4d,%4d,%4d,%4d,%4d,%4d,%4d,%4d,%4d,%5d\n",
- plane->base.base.id, plane->base.name,
- old_wm->wm[0].blocks, old_wm->wm[1].blocks,
- old_wm->wm[2].blocks, old_wm->wm[3].blocks,
- old_wm->wm[4].blocks, old_wm->wm[5].blocks,
- old_wm->wm[6].blocks, old_wm->wm[7].blocks,
- old_wm->trans_wm.blocks,
- old_wm->sagv.wm0.blocks,
- old_wm->sagv.trans_wm.blocks,
- new_wm->wm[0].blocks, new_wm->wm[1].blocks,
- new_wm->wm[2].blocks, new_wm->wm[3].blocks,
- new_wm->wm[4].blocks, new_wm->wm[5].blocks,
- new_wm->wm[6].blocks, new_wm->wm[7].blocks,
- new_wm->trans_wm.blocks,
- new_wm->sagv.wm0.blocks,
- new_wm->sagv.trans_wm.blocks);
-
- drm_dbg_kms(&dev_priv->drm,
- "[PLANE:%d:%s] min_ddb %4d,%4d,%4d,%4d,%4d,%4d,%4d,%4d,%4d,%4d,%5d"
- " -> %4d,%4d,%4d,%4d,%4d,%4d,%4d,%4d,%4d,%4d,%5d\n",
- plane->base.base.id, plane->base.name,
- old_wm->wm[0].min_ddb_alloc, old_wm->wm[1].min_ddb_alloc,
- old_wm->wm[2].min_ddb_alloc, old_wm->wm[3].min_ddb_alloc,
- old_wm->wm[4].min_ddb_alloc, old_wm->wm[5].min_ddb_alloc,
- old_wm->wm[6].min_ddb_alloc, old_wm->wm[7].min_ddb_alloc,
- old_wm->trans_wm.min_ddb_alloc,
- old_wm->sagv.wm0.min_ddb_alloc,
- old_wm->sagv.trans_wm.min_ddb_alloc,
- new_wm->wm[0].min_ddb_alloc, new_wm->wm[1].min_ddb_alloc,
- new_wm->wm[2].min_ddb_alloc, new_wm->wm[3].min_ddb_alloc,
- new_wm->wm[4].min_ddb_alloc, new_wm->wm[5].min_ddb_alloc,
- new_wm->wm[6].min_ddb_alloc, new_wm->wm[7].min_ddb_alloc,
- new_wm->trans_wm.min_ddb_alloc,
- new_wm->sagv.wm0.min_ddb_alloc,
- new_wm->sagv.trans_wm.min_ddb_alloc);
- }
- }
-}
-
-static bool skl_plane_selected_wm_equals(struct intel_plane *plane,
- const struct skl_pipe_wm *old_pipe_wm,
- const struct skl_pipe_wm *new_pipe_wm)
-{
- struct drm_i915_private *i915 = to_i915(plane->base.dev);
- int level, max_level = ilk_wm_max_level(i915);
-
- for (level = 0; level <= max_level; level++) {
- /*
- * We don't check uv_wm as the hardware doesn't actually
- * use it. It only gets used for calculating the required
- * ddb allocation.
- */
- if (!skl_wm_level_equals(skl_plane_wm_level(old_pipe_wm, plane->id, level),
- skl_plane_wm_level(new_pipe_wm, plane->id, level)))
- return false;
- }
-
- if (HAS_HW_SAGV_WM(i915)) {
- const struct skl_plane_wm *old_wm = &old_pipe_wm->planes[plane->id];
- const struct skl_plane_wm *new_wm = &new_pipe_wm->planes[plane->id];
-
- if (!skl_wm_level_equals(&old_wm->sagv.wm0, &new_wm->sagv.wm0) ||
- !skl_wm_level_equals(&old_wm->sagv.trans_wm, &new_wm->sagv.trans_wm))
- return false;
- }
-
- return skl_wm_level_equals(skl_plane_trans_wm(old_pipe_wm, plane->id),
- skl_plane_trans_wm(new_pipe_wm, plane->id));
-}
-
-/*
- * To make sure the cursor watermark registers are always consistent
- * with our computed state the following scenario needs special
- * treatment:
- *
- * 1. enable cursor
- * 2. move cursor entirely offscreen
- * 3. disable cursor
- *
- * Step 2. does call .disable_plane() but does not zero the watermarks
- * (since we consider an offscreen cursor still active for the purposes
- * of watermarks). Step 3. would not normally call .disable_plane()
- * because the actual plane visibility isn't changing, and we don't
- * deallocate the cursor ddb until the pipe gets disabled. So we must
- * force step 3. to call .disable_plane() to update the watermark
- * registers properly.
- *
- * Other planes do not suffer from this issues as their watermarks are
- * calculated based on the actual plane visibility. The only time this
- * can trigger for the other planes is during the initial readout as the
- * default value of the watermarks registers is not zero.
- */
-static int skl_wm_add_affected_planes(struct intel_atomic_state *state,
- struct intel_crtc *crtc)
-{
- struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
- const struct intel_crtc_state *old_crtc_state =
- intel_atomic_get_old_crtc_state(state, crtc);
- struct intel_crtc_state *new_crtc_state =
- intel_atomic_get_new_crtc_state(state, crtc);
- struct intel_plane *plane;
-
- for_each_intel_plane_on_crtc(&dev_priv->drm, crtc, plane) {
- struct intel_plane_state *plane_state;
- enum plane_id plane_id = plane->id;
-
- /*
- * Force a full wm update for every plane on modeset.
- * Required because the reset value of the wm registers
- * is non-zero, whereas we want all disabled planes to
- * have zero watermarks. So if we turn off the relevant
- * power well the hardware state will go out of sync
- * with the software state.
- */
- if (!drm_atomic_crtc_needs_modeset(&new_crtc_state->uapi) &&
- skl_plane_selected_wm_equals(plane,
- &old_crtc_state->wm.skl.optimal,
- &new_crtc_state->wm.skl.optimal))
- continue;
-
- plane_state = intel_atomic_get_plane_state(state, plane);
- if (IS_ERR(plane_state))
- return PTR_ERR(plane_state);
-
- new_crtc_state->update_planes |= BIT(plane_id);
- }
-
- return 0;
-}
-
-static int
-skl_compute_wm(struct intel_atomic_state *state)
-{
- struct intel_crtc *crtc;
- struct intel_crtc_state *new_crtc_state;
- int ret, i;
-
- for_each_new_intel_crtc_in_state(state, crtc, new_crtc_state, i) {
- ret = skl_build_pipe_wm(state, crtc);
- if (ret)
- return ret;
- }
-
- ret = skl_compute_ddb(state);
- if (ret)
- return ret;
-
- ret = intel_compute_sagv_mask(state);
- if (ret)
- return ret;
-
- /*
- * skl_compute_ddb() will have adjusted the final watermarks
- * based on how much ddb is available. Now we can actually
- * check if the final watermarks changed.
- */
- for_each_new_intel_crtc_in_state(state, crtc, new_crtc_state, i) {
- ret = skl_wm_add_affected_planes(state, crtc);
- if (ret)
- return ret;
- }
-
- skl_print_wm_changes(state);
-
- return 0;
-}
-
-static void ilk_compute_wm_config(struct drm_i915_private *dev_priv,
- struct intel_wm_config *config)
-{
- struct intel_crtc *crtc;
-
- /* Compute the currently _active_ config */
- for_each_intel_crtc(&dev_priv->drm, crtc) {
- const struct intel_pipe_wm *wm = &crtc->wm.active.ilk;
-
- if (!wm->pipe_enabled)
- continue;
-
- config->sprites_enabled |= wm->sprites_enabled;
- config->sprites_scaled |= wm->sprites_scaled;
- config->num_pipes_active++;
- }
-}
-
-static void ilk_program_watermarks(struct drm_i915_private *dev_priv)
-{
- struct intel_pipe_wm lp_wm_1_2 = {}, lp_wm_5_6 = {}, *best_lp_wm;
- struct ilk_wm_maximums max;
- struct intel_wm_config config = {};
- struct ilk_wm_values results = {};
- enum intel_ddb_partitioning partitioning;
-
- ilk_compute_wm_config(dev_priv, &config);
-
- ilk_compute_wm_maximums(dev_priv, 1, &config, INTEL_DDB_PART_1_2, &max);
- ilk_wm_merge(dev_priv, &config, &max, &lp_wm_1_2);
-
- /* 5/6 split only in single pipe config on IVB+ */
- if (DISPLAY_VER(dev_priv) >= 7 &&
- config.num_pipes_active == 1 && config.sprites_enabled) {
- ilk_compute_wm_maximums(dev_priv, 1, &config, INTEL_DDB_PART_5_6, &max);
- ilk_wm_merge(dev_priv, &config, &max, &lp_wm_5_6);
-
- best_lp_wm = ilk_find_best_result(dev_priv, &lp_wm_1_2, &lp_wm_5_6);
- } else {
- best_lp_wm = &lp_wm_1_2;
- }
-
- partitioning = (best_lp_wm == &lp_wm_1_2) ?
- INTEL_DDB_PART_1_2 : INTEL_DDB_PART_5_6;
-
- ilk_compute_wm_results(dev_priv, best_lp_wm, partitioning, &results);
-
- ilk_write_wm_values(dev_priv, &results);
-}
-
-static void ilk_initial_watermarks(struct intel_atomic_state *state,
- struct intel_crtc *crtc)
-{
- struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
- const struct intel_crtc_state *crtc_state =
- intel_atomic_get_new_crtc_state(state, crtc);
-
- mutex_lock(&dev_priv->display.wm.wm_mutex);
- crtc->wm.active.ilk = crtc_state->wm.ilk.intermediate;
- ilk_program_watermarks(dev_priv);
- mutex_unlock(&dev_priv->display.wm.wm_mutex);
-}
-
-static void ilk_optimize_watermarks(struct intel_atomic_state *state,
- struct intel_crtc *crtc)
-{
- struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
- const struct intel_crtc_state *crtc_state =
- intel_atomic_get_new_crtc_state(state, crtc);
-
- if (!crtc_state->wm.need_postvbl_update)
- return;
-
- mutex_lock(&dev_priv->display.wm.wm_mutex);
- crtc->wm.active.ilk = crtc_state->wm.ilk.optimal;
- ilk_program_watermarks(dev_priv);
- mutex_unlock(&dev_priv->display.wm.wm_mutex);
-}
-
-static void skl_wm_level_from_reg_val(u32 val, struct skl_wm_level *level)
-{
- level->enable = val & PLANE_WM_EN;
- level->ignore_lines = val & PLANE_WM_IGNORE_LINES;
- level->blocks = REG_FIELD_GET(PLANE_WM_BLOCKS_MASK, val);
- level->lines = REG_FIELD_GET(PLANE_WM_LINES_MASK, val);
-}
-
-static void skl_pipe_wm_get_hw_state(struct intel_crtc *crtc,
- struct skl_pipe_wm *out)
-{
- struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
- enum pipe pipe = crtc->pipe;
- int level, max_level;
- enum plane_id plane_id;
- u32 val;
-
- max_level = ilk_wm_max_level(dev_priv);
-
- for_each_plane_id_on_crtc(crtc, plane_id) {
- struct skl_plane_wm *wm = &out->planes[plane_id];
-
- for (level = 0; level <= max_level; level++) {
- if (plane_id != PLANE_CURSOR)
- val = intel_uncore_read(&dev_priv->uncore, PLANE_WM(pipe, plane_id, level));
- else
- val = intel_uncore_read(&dev_priv->uncore, CUR_WM(pipe, level));
-
- skl_wm_level_from_reg_val(val, &wm->wm[level]);
- }
-
- if (plane_id != PLANE_CURSOR)
- val = intel_uncore_read(&dev_priv->uncore, PLANE_WM_TRANS(pipe, plane_id));
- else
- val = intel_uncore_read(&dev_priv->uncore, CUR_WM_TRANS(pipe));
-
- skl_wm_level_from_reg_val(val, &wm->trans_wm);
-
- if (HAS_HW_SAGV_WM(dev_priv)) {
- if (plane_id != PLANE_CURSOR)
- val = intel_uncore_read(&dev_priv->uncore,
- PLANE_WM_SAGV(pipe, plane_id));
- else
- val = intel_uncore_read(&dev_priv->uncore,
- CUR_WM_SAGV(pipe));
-
- skl_wm_level_from_reg_val(val, &wm->sagv.wm0);
-
- if (plane_id != PLANE_CURSOR)
- val = intel_uncore_read(&dev_priv->uncore,
- PLANE_WM_SAGV_TRANS(pipe, plane_id));
- else
- val = intel_uncore_read(&dev_priv->uncore,
- CUR_WM_SAGV_TRANS(pipe));
-
- skl_wm_level_from_reg_val(val, &wm->sagv.trans_wm);
- } else if (DISPLAY_VER(dev_priv) >= 12) {
- wm->sagv.wm0 = wm->wm[0];
- wm->sagv.trans_wm = wm->trans_wm;
- }
- }
-}
-
-void skl_wm_get_hw_state(struct drm_i915_private *dev_priv)
-{
- struct intel_dbuf_state *dbuf_state =
- to_intel_dbuf_state(dev_priv->display.dbuf.obj.state);
- struct intel_crtc *crtc;
-
- if (HAS_MBUS_JOINING(dev_priv))
- dbuf_state->joined_mbus = intel_de_read(dev_priv, MBUS_CTL) & MBUS_JOIN;
-
- for_each_intel_crtc(&dev_priv->drm, crtc) {
- struct intel_crtc_state *crtc_state =
- to_intel_crtc_state(crtc->base.state);
- enum pipe pipe = crtc->pipe;
- unsigned int mbus_offset;
- enum plane_id plane_id;
- u8 slices;
-
- memset(&crtc_state->wm.skl.optimal, 0,
- sizeof(crtc_state->wm.skl.optimal));
- if (crtc_state->hw.active)
- skl_pipe_wm_get_hw_state(crtc, &crtc_state->wm.skl.optimal);
- crtc_state->wm.skl.raw = crtc_state->wm.skl.optimal;
-
- memset(&dbuf_state->ddb[pipe], 0, sizeof(dbuf_state->ddb[pipe]));
-
- for_each_plane_id_on_crtc(crtc, plane_id) {
- struct skl_ddb_entry *ddb =
- &crtc_state->wm.skl.plane_ddb[plane_id];
- struct skl_ddb_entry *ddb_y =
- &crtc_state->wm.skl.plane_ddb_y[plane_id];
-
- if (!crtc_state->hw.active)
- continue;
-
- skl_ddb_get_hw_plane_state(dev_priv, crtc->pipe,
- plane_id, ddb, ddb_y);
-
- skl_ddb_entry_union(&dbuf_state->ddb[pipe], ddb);
- skl_ddb_entry_union(&dbuf_state->ddb[pipe], ddb_y);
- }
-
- dbuf_state->weight[pipe] = intel_crtc_ddb_weight(crtc_state);
-
- /*
- * Used for checking overlaps, so we need absolute
- * offsets instead of MBUS relative offsets.
- */
- slices = skl_compute_dbuf_slices(crtc, dbuf_state->active_pipes,
- dbuf_state->joined_mbus);
- mbus_offset = mbus_ddb_offset(dev_priv, slices);
- crtc_state->wm.skl.ddb.start = mbus_offset + dbuf_state->ddb[pipe].start;
- crtc_state->wm.skl.ddb.end = mbus_offset + dbuf_state->ddb[pipe].end;
-
- /* The slices actually used by the planes on the pipe */
- dbuf_state->slices[pipe] =
- skl_ddb_dbuf_slice_mask(dev_priv, &crtc_state->wm.skl.ddb);
-
- drm_dbg_kms(&dev_priv->drm,
- "[CRTC:%d:%s] dbuf slices 0x%x, ddb (%d - %d), active pipes 0x%x, mbus joined: %s\n",
- crtc->base.base.id, crtc->base.name,
- dbuf_state->slices[pipe], dbuf_state->ddb[pipe].start,
- dbuf_state->ddb[pipe].end, dbuf_state->active_pipes,
- str_yes_no(dbuf_state->joined_mbus));
- }
-
- dbuf_state->enabled_slices = dev_priv->display.dbuf.enabled_slices;
-}
-
-static bool skl_dbuf_is_misconfigured(struct drm_i915_private *i915)
-{
- const struct intel_dbuf_state *dbuf_state =
- to_intel_dbuf_state(i915->display.dbuf.obj.state);
- struct skl_ddb_entry entries[I915_MAX_PIPES] = {};
- struct intel_crtc *crtc;
-
- for_each_intel_crtc(&i915->drm, crtc) {
- const struct intel_crtc_state *crtc_state =
- to_intel_crtc_state(crtc->base.state);
-
- entries[crtc->pipe] = crtc_state->wm.skl.ddb;
- }
-
- for_each_intel_crtc(&i915->drm, crtc) {
- const struct intel_crtc_state *crtc_state =
- to_intel_crtc_state(crtc->base.state);
- u8 slices;
-
- slices = skl_compute_dbuf_slices(crtc, dbuf_state->active_pipes,
- dbuf_state->joined_mbus);
- if (dbuf_state->slices[crtc->pipe] & ~slices)
- return true;
-
- if (skl_ddb_allocation_overlaps(&crtc_state->wm.skl.ddb, entries,
- I915_MAX_PIPES, crtc->pipe))
- return true;
- }
-
- return false;
-}
-
-void skl_wm_sanitize(struct drm_i915_private *i915)
-{
- struct intel_crtc *crtc;
-
- /*
- * On TGL/RKL (at least) the BIOS likes to assign the planes
- * to the wrong DBUF slices. This will cause an infinite loop
- * in skl_commit_modeset_enables() as it can't find a way to
- * transition between the old bogus DBUF layout to the new
- * proper DBUF layout without DBUF allocation overlaps between
- * the planes (which cannot be allowed or else the hardware
- * may hang). If we detect a bogus DBUF layout just turn off
- * all the planes so that skl_commit_modeset_enables() can
- * simply ignore them.
- */
- if (!skl_dbuf_is_misconfigured(i915))
- return;
-
- drm_dbg_kms(&i915->drm, "BIOS has misprogrammed the DBUF, disabling all planes\n");
-
- for_each_intel_crtc(&i915->drm, crtc) {
- struct intel_plane *plane = to_intel_plane(crtc->base.primary);
- const struct intel_plane_state *plane_state =
- to_intel_plane_state(plane->base.state);
- struct intel_crtc_state *crtc_state =
- to_intel_crtc_state(crtc->base.state);
-
- if (plane_state->uapi.visible)
- intel_plane_disable_noatomic(crtc, plane);
-
- drm_WARN_ON(&i915->drm, crtc_state->active_planes != 0);
-
- memset(&crtc_state->wm.skl.ddb, 0, sizeof(crtc_state->wm.skl.ddb));
- }
-}
-
-static void ilk_pipe_wm_get_hw_state(struct intel_crtc *crtc)
-{
- struct drm_device *dev = crtc->base.dev;
- struct drm_i915_private *dev_priv = to_i915(dev);
- struct ilk_wm_values *hw = &dev_priv->display.wm.hw;
- struct intel_crtc_state *crtc_state = to_intel_crtc_state(crtc->base.state);
- struct intel_pipe_wm *active = &crtc_state->wm.ilk.optimal;
- enum pipe pipe = crtc->pipe;
-
- hw->wm_pipe[pipe] = intel_uncore_read(&dev_priv->uncore, WM0_PIPE_ILK(pipe));
-
- memset(active, 0, sizeof(*active));
-
- active->pipe_enabled = crtc->active;
-
- if (active->pipe_enabled) {
- u32 tmp = hw->wm_pipe[pipe];
-
- /*
- * For active pipes LP0 watermark is marked as
- * enabled, and LP1+ watermaks as disabled since
- * we can't really reverse compute them in case
- * multiple pipes are active.
- */
- active->wm[0].enable = true;
- active->wm[0].pri_val = REG_FIELD_GET(WM0_PIPE_PRIMARY_MASK, tmp);
- active->wm[0].spr_val = REG_FIELD_GET(WM0_PIPE_SPRITE_MASK, tmp);
- active->wm[0].cur_val = REG_FIELD_GET(WM0_PIPE_CURSOR_MASK, tmp);
- } else {
- int level, max_level = ilk_wm_max_level(dev_priv);
-
- /*
- * For inactive pipes, all watermark levels
- * should be marked as enabled but zeroed,
- * which is what we'd compute them to.
- */
- for (level = 0; level <= max_level; level++)
- active->wm[level].enable = true;
- }
-
- crtc->wm.active.ilk = *active;
-}
-
-#define _FW_WM(value, plane) \
- (((value) & DSPFW_ ## plane ## _MASK) >> DSPFW_ ## plane ## _SHIFT)
-#define _FW_WM_VLV(value, plane) \
- (((value) & DSPFW_ ## plane ## _MASK_VLV) >> DSPFW_ ## plane ## _SHIFT)
-
-static void g4x_read_wm_values(struct drm_i915_private *dev_priv,
- struct g4x_wm_values *wm)
-{
- u32 tmp;
-
- tmp = intel_uncore_read(&dev_priv->uncore, DSPFW1);
- wm->sr.plane = _FW_WM(tmp, SR);
- wm->pipe[PIPE_B].plane[PLANE_CURSOR] = _FW_WM(tmp, CURSORB);
- wm->pipe[PIPE_B].plane[PLANE_PRIMARY] = _FW_WM(tmp, PLANEB);
- wm->pipe[PIPE_A].plane[PLANE_PRIMARY] = _FW_WM(tmp, PLANEA);
-
- tmp = intel_uncore_read(&dev_priv->uncore, DSPFW2);
- wm->fbc_en = tmp & DSPFW_FBC_SR_EN;
- wm->sr.fbc = _FW_WM(tmp, FBC_SR);
- wm->hpll.fbc = _FW_WM(tmp, FBC_HPLL_SR);
- wm->pipe[PIPE_B].plane[PLANE_SPRITE0] = _FW_WM(tmp, SPRITEB);
- wm->pipe[PIPE_A].plane[PLANE_CURSOR] = _FW_WM(tmp, CURSORA);
- wm->pipe[PIPE_A].plane[PLANE_SPRITE0] = _FW_WM(tmp, SPRITEA);
-
- tmp = intel_uncore_read(&dev_priv->uncore, DSPFW3);
- wm->hpll_en = tmp & DSPFW_HPLL_SR_EN;
- wm->sr.cursor = _FW_WM(tmp, CURSOR_SR);
- wm->hpll.cursor = _FW_WM(tmp, HPLL_CURSOR);
- wm->hpll.plane = _FW_WM(tmp, HPLL_SR);
-}
-
-static void vlv_read_wm_values(struct drm_i915_private *dev_priv,
- struct vlv_wm_values *wm)
-{
- enum pipe pipe;
- u32 tmp;
-
- for_each_pipe(dev_priv, pipe) {
- tmp = intel_uncore_read(&dev_priv->uncore, VLV_DDL(pipe));
-
- wm->ddl[pipe].plane[PLANE_PRIMARY] =
- (tmp >> DDL_PLANE_SHIFT) & (DDL_PRECISION_HIGH | DRAIN_LATENCY_MASK);
- wm->ddl[pipe].plane[PLANE_CURSOR] =
- (tmp >> DDL_CURSOR_SHIFT) & (DDL_PRECISION_HIGH | DRAIN_LATENCY_MASK);
- wm->ddl[pipe].plane[PLANE_SPRITE0] =
- (tmp >> DDL_SPRITE_SHIFT(0)) & (DDL_PRECISION_HIGH | DRAIN_LATENCY_MASK);
- wm->ddl[pipe].plane[PLANE_SPRITE1] =
- (tmp >> DDL_SPRITE_SHIFT(1)) & (DDL_PRECISION_HIGH | DRAIN_LATENCY_MASK);
- }
-
- tmp = intel_uncore_read(&dev_priv->uncore, DSPFW1);
- wm->sr.plane = _FW_WM(tmp, SR);
- wm->pipe[PIPE_B].plane[PLANE_CURSOR] = _FW_WM(tmp, CURSORB);
- wm->pipe[PIPE_B].plane[PLANE_PRIMARY] = _FW_WM_VLV(tmp, PLANEB);
- wm->pipe[PIPE_A].plane[PLANE_PRIMARY] = _FW_WM_VLV(tmp, PLANEA);
-
- tmp = intel_uncore_read(&dev_priv->uncore, DSPFW2);
- wm->pipe[PIPE_A].plane[PLANE_SPRITE1] = _FW_WM_VLV(tmp, SPRITEB);
- wm->pipe[PIPE_A].plane[PLANE_CURSOR] = _FW_WM(tmp, CURSORA);
- wm->pipe[PIPE_A].plane[PLANE_SPRITE0] = _FW_WM_VLV(tmp, SPRITEA);
-
- tmp = intel_uncore_read(&dev_priv->uncore, DSPFW3);
- wm->sr.cursor = _FW_WM(tmp, CURSOR_SR);
-
- if (IS_CHERRYVIEW(dev_priv)) {
- tmp = intel_uncore_read(&dev_priv->uncore, DSPFW7_CHV);
- wm->pipe[PIPE_B].plane[PLANE_SPRITE1] = _FW_WM_VLV(tmp, SPRITED);
- wm->pipe[PIPE_B].plane[PLANE_SPRITE0] = _FW_WM_VLV(tmp, SPRITEC);
-
- tmp = intel_uncore_read(&dev_priv->uncore, DSPFW8_CHV);
- wm->pipe[PIPE_C].plane[PLANE_SPRITE1] = _FW_WM_VLV(tmp, SPRITEF);
- wm->pipe[PIPE_C].plane[PLANE_SPRITE0] = _FW_WM_VLV(tmp, SPRITEE);
+ tmp = intel_uncore_read(&dev_priv->uncore, DSPFW8_CHV);
+ wm->pipe[PIPE_C].plane[PLANE_SPRITE1] = _FW_WM_VLV(tmp, SPRITEF);
+ wm->pipe[PIPE_C].plane[PLANE_SPRITE0] = _FW_WM_VLV(tmp, SPRITEE);
tmp = intel_uncore_read(&dev_priv->uncore, DSPFW9_CHV);
wm->pipe[PIPE_C].plane[PLANE_PRIMARY] = _FW_WM_VLV(tmp, PLANEC);
!(intel_uncore_read(&dev_priv->uncore, DISP_ARB_CTL) & DISP_FBC_WM_DIS);
}
-void intel_wm_state_verify(struct intel_crtc *crtc,
- struct intel_crtc_state *new_crtc_state)
-{
- struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
- struct skl_hw_state {
- struct skl_ddb_entry ddb[I915_MAX_PLANES];
- struct skl_ddb_entry ddb_y[I915_MAX_PLANES];
- struct skl_pipe_wm wm;
- } *hw;
- const struct skl_pipe_wm *sw_wm = &new_crtc_state->wm.skl.optimal;
- int level, max_level = ilk_wm_max_level(dev_priv);
- struct intel_plane *plane;
- u8 hw_enabled_slices;
-
- if (DISPLAY_VER(dev_priv) < 9 || !new_crtc_state->hw.active)
- return;
-
- hw = kzalloc(sizeof(*hw), GFP_KERNEL);
- if (!hw)
- return;
-
- skl_pipe_wm_get_hw_state(crtc, &hw->wm);
-
- skl_pipe_ddb_get_hw_state(crtc, hw->ddb, hw->ddb_y);
-
- hw_enabled_slices = intel_enabled_dbuf_slices_mask(dev_priv);
-
- if (DISPLAY_VER(dev_priv) >= 11 &&
- hw_enabled_slices != dev_priv->display.dbuf.enabled_slices)
- drm_err(&dev_priv->drm,
- "mismatch in DBUF Slices (expected 0x%x, got 0x%x)\n",
- dev_priv->display.dbuf.enabled_slices,
- hw_enabled_slices);
-
- for_each_intel_plane_on_crtc(&dev_priv->drm, crtc, plane) {
- const struct skl_ddb_entry *hw_ddb_entry, *sw_ddb_entry;
- const struct skl_wm_level *hw_wm_level, *sw_wm_level;
-
- /* Watermarks */
- for (level = 0; level <= max_level; level++) {
- hw_wm_level = &hw->wm.planes[plane->id].wm[level];
- sw_wm_level = skl_plane_wm_level(sw_wm, plane->id, level);
-
- if (skl_wm_level_equals(hw_wm_level, sw_wm_level))
- continue;
-
- drm_err(&dev_priv->drm,
- "[PLANE:%d:%s] mismatch in WM%d (expected e=%d b=%u l=%u, got e=%d b=%u l=%u)\n",
- plane->base.base.id, plane->base.name, level,
- sw_wm_level->enable,
- sw_wm_level->blocks,
- sw_wm_level->lines,
- hw_wm_level->enable,
- hw_wm_level->blocks,
- hw_wm_level->lines);
- }
-
- hw_wm_level = &hw->wm.planes[plane->id].trans_wm;
- sw_wm_level = skl_plane_trans_wm(sw_wm, plane->id);
-
- if (!skl_wm_level_equals(hw_wm_level, sw_wm_level)) {
- drm_err(&dev_priv->drm,
- "[PLANE:%d:%s] mismatch in trans WM (expected e=%d b=%u l=%u, got e=%d b=%u l=%u)\n",
- plane->base.base.id, plane->base.name,
- sw_wm_level->enable,
- sw_wm_level->blocks,
- sw_wm_level->lines,
- hw_wm_level->enable,
- hw_wm_level->blocks,
- hw_wm_level->lines);
- }
-
- hw_wm_level = &hw->wm.planes[plane->id].sagv.wm0;
- sw_wm_level = &sw_wm->planes[plane->id].sagv.wm0;
-
- if (HAS_HW_SAGV_WM(dev_priv) &&
- !skl_wm_level_equals(hw_wm_level, sw_wm_level)) {
- drm_err(&dev_priv->drm,
- "[PLANE:%d:%s] mismatch in SAGV WM (expected e=%d b=%u l=%u, got e=%d b=%u l=%u)\n",
- plane->base.base.id, plane->base.name,
- sw_wm_level->enable,
- sw_wm_level->blocks,
- sw_wm_level->lines,
- hw_wm_level->enable,
- hw_wm_level->blocks,
- hw_wm_level->lines);
- }
-
- hw_wm_level = &hw->wm.planes[plane->id].sagv.trans_wm;
- sw_wm_level = &sw_wm->planes[plane->id].sagv.trans_wm;
-
- if (HAS_HW_SAGV_WM(dev_priv) &&
- !skl_wm_level_equals(hw_wm_level, sw_wm_level)) {
- drm_err(&dev_priv->drm,
- "[PLANE:%d:%s] mismatch in SAGV trans WM (expected e=%d b=%u l=%u, got e=%d b=%u l=%u)\n",
- plane->base.base.id, plane->base.name,
- sw_wm_level->enable,
- sw_wm_level->blocks,
- sw_wm_level->lines,
- hw_wm_level->enable,
- hw_wm_level->blocks,
- hw_wm_level->lines);
- }
-
- /* DDB */
- hw_ddb_entry = &hw->ddb[PLANE_CURSOR];
- sw_ddb_entry = &new_crtc_state->wm.skl.plane_ddb[PLANE_CURSOR];
-
- if (!skl_ddb_entry_equal(hw_ddb_entry, sw_ddb_entry)) {
- drm_err(&dev_priv->drm,
- "[PLANE:%d:%s] mismatch in DDB (expected (%u,%u), found (%u,%u))\n",
- plane->base.base.id, plane->base.name,
- sw_ddb_entry->start, sw_ddb_entry->end,
- hw_ddb_entry->start, hw_ddb_entry->end);
- }
- }
-
- kfree(hw);
-}
-
-void intel_enable_ipc(struct drm_i915_private *dev_priv)
-{
- u32 val;
-
- if (!HAS_IPC(dev_priv))
- return;
-
- val = intel_uncore_read(&dev_priv->uncore, DISP_ARB_CTL2);
-
- if (dev_priv->ipc_enabled)
- val |= DISP_IPC_ENABLE;
- else
- val &= ~DISP_IPC_ENABLE;
-
- intel_uncore_write(&dev_priv->uncore, DISP_ARB_CTL2, val);
-}
-
-static bool intel_can_enable_ipc(struct drm_i915_private *dev_priv)
-{
- /* Display WA #0477 WaDisableIPC: skl */
- if (IS_SKYLAKE(dev_priv))
- return false;
-
- /* Display WA #1141: SKL:all KBL:all CFL */
- if (IS_KABYLAKE(dev_priv) ||
- IS_COFFEELAKE(dev_priv) ||
- IS_COMETLAKE(dev_priv))
- return dev_priv->dram_info.symmetric_memory;
-
- return true;
-}
-
-void intel_init_ipc(struct drm_i915_private *dev_priv)
-{
- if (!HAS_IPC(dev_priv))
- return;
-
- dev_priv->ipc_enabled = intel_can_enable_ipc(dev_priv);
-
- intel_enable_ipc(dev_priv);
-}
-
static void ibx_init_clock_gating(struct drm_i915_private *dev_priv)
{
/*
}
}
-static const struct intel_wm_funcs skl_wm_funcs = {
- .compute_global_watermarks = skl_compute_wm,
-};
-
static const struct intel_wm_funcs ilk_wm_funcs = {
.compute_pipe_wm = ilk_compute_pipe_wm,
.compute_intermediate_wm = ilk_compute_intermediate_wm,
/* Set up chip specific power management-related functions */
void intel_init_pm(struct drm_i915_private *dev_priv)
{
+ if (DISPLAY_VER(dev_priv) >= 9) {
+ skl_wm_init(dev_priv);
+ return;
+ }
+
/* For cxsr */
if (IS_PINEVIEW(dev_priv))
pnv_get_mem_freq(dev_priv);
else if (GRAPHICS_VER(dev_priv) == 5)
ilk_get_mem_freq(dev_priv);
- intel_sagv_init(dev_priv);
-
/* For FIFO watermark updates */
- if (DISPLAY_VER(dev_priv) >= 9) {
- skl_setup_wm_latency(dev_priv);
- dev_priv->display.funcs.wm = &skl_wm_funcs;
- } else if (HAS_PCH_SPLIT(dev_priv)) {
+ if (HAS_PCH_SPLIT(dev_priv)) {
ilk_setup_wm_latency(dev_priv);
if ((DISPLAY_VER(dev_priv) == 5 && dev_priv->display.wm.pri_latency[1] &&
dev_priv->runtime_pm.suspended = false;
atomic_set(&dev_priv->runtime_pm.wakeref_count, 0);
}
-
-static struct intel_global_state *intel_dbuf_duplicate_state(struct intel_global_obj *obj)
-{
- struct intel_dbuf_state *dbuf_state;
-
- dbuf_state = kmemdup(obj->state, sizeof(*dbuf_state), GFP_KERNEL);
- if (!dbuf_state)
- return NULL;
-
- return &dbuf_state->base;
-}
-
-static void intel_dbuf_destroy_state(struct intel_global_obj *obj,
- struct intel_global_state *state)
-{
- kfree(state);
-}
-
-static const struct intel_global_state_funcs intel_dbuf_funcs = {
- .atomic_duplicate_state = intel_dbuf_duplicate_state,
- .atomic_destroy_state = intel_dbuf_destroy_state,
-};
-
-struct intel_dbuf_state *
-intel_atomic_get_dbuf_state(struct intel_atomic_state *state)
-{
- struct drm_i915_private *dev_priv = to_i915(state->base.dev);
- struct intel_global_state *dbuf_state;
-
- dbuf_state = intel_atomic_get_global_obj_state(state, &dev_priv->display.dbuf.obj);
- if (IS_ERR(dbuf_state))
- return ERR_CAST(dbuf_state);
-
- return to_intel_dbuf_state(dbuf_state);
-}
-
-int intel_dbuf_init(struct drm_i915_private *dev_priv)
-{
- struct intel_dbuf_state *dbuf_state;
-
- dbuf_state = kzalloc(sizeof(*dbuf_state), GFP_KERNEL);
- if (!dbuf_state)
- return -ENOMEM;
-
- intel_atomic_global_obj_init(dev_priv, &dev_priv->display.dbuf.obj,
- &dbuf_state->base, &intel_dbuf_funcs);
-
- return 0;
-}
-
-/*
- * Configure MBUS_CTL and all DBUF_CTL_S of each slice to join_mbus state before
- * update the request state of all DBUS slices.
- */
-static void update_mbus_pre_enable(struct intel_atomic_state *state)
-{
- struct drm_i915_private *dev_priv = to_i915(state->base.dev);
- u32 mbus_ctl, dbuf_min_tracker_val;
- enum dbuf_slice slice;
- const struct intel_dbuf_state *dbuf_state =
- intel_atomic_get_new_dbuf_state(state);
-
- if (!HAS_MBUS_JOINING(dev_priv))
- return;
-
- /*
- * TODO: Implement vblank synchronized MBUS joining changes.
- * Must be properly coordinated with dbuf reprogramming.
- */
- if (dbuf_state->joined_mbus) {
- mbus_ctl = MBUS_HASHING_MODE_1x4 | MBUS_JOIN |
- MBUS_JOIN_PIPE_SELECT_NONE;
- dbuf_min_tracker_val = DBUF_MIN_TRACKER_STATE_SERVICE(3);
- } else {
- mbus_ctl = MBUS_HASHING_MODE_2x2 |
- MBUS_JOIN_PIPE_SELECT_NONE;
- dbuf_min_tracker_val = DBUF_MIN_TRACKER_STATE_SERVICE(1);
- }
-
- intel_de_rmw(dev_priv, MBUS_CTL,
- MBUS_HASHING_MODE_MASK | MBUS_JOIN |
- MBUS_JOIN_PIPE_SELECT_MASK, mbus_ctl);
-
- for_each_dbuf_slice(dev_priv, slice)
- intel_de_rmw(dev_priv, DBUF_CTL_S(slice),
- DBUF_MIN_TRACKER_STATE_SERVICE_MASK,
- dbuf_min_tracker_val);
-}
-
-void intel_dbuf_pre_plane_update(struct intel_atomic_state *state)
-{
- struct drm_i915_private *dev_priv = to_i915(state->base.dev);
- const struct intel_dbuf_state *new_dbuf_state =
- intel_atomic_get_new_dbuf_state(state);
- const struct intel_dbuf_state *old_dbuf_state =
- intel_atomic_get_old_dbuf_state(state);
-
- if (!new_dbuf_state ||
- ((new_dbuf_state->enabled_slices == old_dbuf_state->enabled_slices)
- && (new_dbuf_state->joined_mbus == old_dbuf_state->joined_mbus)))
- return;
-
- WARN_ON(!new_dbuf_state->base.changed);
-
- update_mbus_pre_enable(state);
- gen9_dbuf_slices_update(dev_priv,
- old_dbuf_state->enabled_slices |
- new_dbuf_state->enabled_slices);
-}
-
-void intel_dbuf_post_plane_update(struct intel_atomic_state *state)
-{
- struct drm_i915_private *dev_priv = to_i915(state->base.dev);
- const struct intel_dbuf_state *new_dbuf_state =
- intel_atomic_get_new_dbuf_state(state);
- const struct intel_dbuf_state *old_dbuf_state =
- intel_atomic_get_old_dbuf_state(state);
-
- if (!new_dbuf_state ||
- ((new_dbuf_state->enabled_slices == old_dbuf_state->enabled_slices)
- && (new_dbuf_state->joined_mbus == old_dbuf_state->joined_mbus)))
- return;
-
- WARN_ON(!new_dbuf_state->base.changed);
-
- gen9_dbuf_slices_update(dev_priv,
- new_dbuf_state->enabled_slices);
-}
-
-void intel_mbus_dbox_update(struct intel_atomic_state *state)
-{
- struct drm_i915_private *i915 = to_i915(state->base.dev);
- const struct intel_dbuf_state *new_dbuf_state, *old_dbuf_state;
- const struct intel_crtc_state *new_crtc_state;
- const struct intel_crtc *crtc;
- u32 val = 0;
- int i;
-
- if (DISPLAY_VER(i915) < 11)
- return;
-
- new_dbuf_state = intel_atomic_get_new_dbuf_state(state);
- old_dbuf_state = intel_atomic_get_old_dbuf_state(state);
- if (!new_dbuf_state ||
- (new_dbuf_state->joined_mbus == old_dbuf_state->joined_mbus &&
- new_dbuf_state->active_pipes == old_dbuf_state->active_pipes))
- return;
-
- if (DISPLAY_VER(i915) >= 12) {
- val |= MBUS_DBOX_B2B_TRANSACTIONS_MAX(16);
- val |= MBUS_DBOX_B2B_TRANSACTIONS_DELAY(1);
- val |= MBUS_DBOX_REGULATE_B2B_TRANSACTIONS_EN;
- }
-
- /* Wa_22010947358:adl-p */
- if (IS_ALDERLAKE_P(i915))
- val |= new_dbuf_state->joined_mbus ? MBUS_DBOX_A_CREDIT(6) :
- MBUS_DBOX_A_CREDIT(4);
- else
- val |= MBUS_DBOX_A_CREDIT(2);
-
- if (IS_ALDERLAKE_P(i915)) {
- val |= MBUS_DBOX_BW_CREDIT(2);
- val |= MBUS_DBOX_B_CREDIT(8);
- } else if (DISPLAY_VER(i915) >= 12) {
- val |= MBUS_DBOX_BW_CREDIT(2);
- val |= MBUS_DBOX_B_CREDIT(12);
- } else {
- val |= MBUS_DBOX_BW_CREDIT(1);
- val |= MBUS_DBOX_B_CREDIT(8);
- }
-
- for_each_new_intel_crtc_in_state(state, crtc, new_crtc_state, i) {
- if (!new_crtc_state->hw.active ||
- !intel_crtc_needs_modeset(new_crtc_state))
- continue;
-
- intel_de_write(i915, PIPE_MBUS_DBOX_CTL(crtc->pipe), val);
- }
-}
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