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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /drivers/gpu/drm/i915/display/intel_crtc.c
parentInitial commit. (diff)
downloadlinux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz
linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip
Adding upstream version 6.1.76.upstream/6.1.76
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/gpu/drm/i915/display/intel_crtc.c')
-rw-r--r--drivers/gpu/drm/i915/display/intel_crtc.c705
1 files changed, 705 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_crtc.c b/drivers/gpu/drm/i915/display/intel_crtc.c
new file mode 100644
index 000000000..6792a9056
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_crtc.c
@@ -0,0 +1,705 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright © 2020 Intel Corporation
+ */
+#include <linux/kernel.h>
+#include <linux/pm_qos.h>
+#include <linux/slab.h>
+
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_fourcc.h>
+#include <drm/drm_plane.h>
+#include <drm/drm_vblank_work.h>
+
+#include "i915_irq.h"
+#include "i915_vgpu.h"
+#include "i9xx_plane.h"
+#include "icl_dsi.h"
+#include "intel_atomic.h"
+#include "intel_atomic_plane.h"
+#include "intel_color.h"
+#include "intel_crtc.h"
+#include "intel_cursor.h"
+#include "intel_display_debugfs.h"
+#include "intel_display_trace.h"
+#include "intel_display_types.h"
+#include "intel_drrs.h"
+#include "intel_dsi.h"
+#include "intel_pipe_crc.h"
+#include "intel_psr.h"
+#include "intel_sprite.h"
+#include "intel_vrr.h"
+#include "skl_universal_plane.h"
+
+static void assert_vblank_disabled(struct drm_crtc *crtc)
+{
+ if (I915_STATE_WARN_ON(drm_crtc_vblank_get(crtc) == 0))
+ drm_crtc_vblank_put(crtc);
+}
+
+struct intel_crtc *intel_first_crtc(struct drm_i915_private *i915)
+{
+ return to_intel_crtc(drm_crtc_from_index(&i915->drm, 0));
+}
+
+struct intel_crtc *intel_crtc_for_pipe(struct drm_i915_private *i915,
+ enum pipe pipe)
+{
+ struct intel_crtc *crtc;
+
+ for_each_intel_crtc(&i915->drm, crtc) {
+ if (crtc->pipe == pipe)
+ return crtc;
+ }
+
+ return NULL;
+}
+
+void intel_crtc_wait_for_next_vblank(struct intel_crtc *crtc)
+{
+ drm_crtc_wait_one_vblank(&crtc->base);
+}
+
+void intel_wait_for_vblank_if_active(struct drm_i915_private *i915,
+ enum pipe pipe)
+{
+ struct intel_crtc *crtc = intel_crtc_for_pipe(i915, pipe);
+
+ if (crtc->active)
+ intel_crtc_wait_for_next_vblank(crtc);
+}
+
+u32 intel_crtc_get_vblank_counter(struct intel_crtc *crtc)
+{
+ struct drm_device *dev = crtc->base.dev;
+ struct drm_vblank_crtc *vblank = &dev->vblank[drm_crtc_index(&crtc->base)];
+
+ if (!crtc->active)
+ return 0;
+
+ if (!vblank->max_vblank_count)
+ return (u32)drm_crtc_accurate_vblank_count(&crtc->base);
+
+ return crtc->base.funcs->get_vblank_counter(&crtc->base);
+}
+
+u32 intel_crtc_max_vblank_count(const struct intel_crtc_state *crtc_state)
+{
+ struct drm_i915_private *dev_priv = to_i915(crtc_state->uapi.crtc->dev);
+
+ /*
+ * From Gen 11, In case of dsi cmd mode, frame counter wouldnt
+ * have updated at the beginning of TE, if we want to use
+ * the hw counter, then we would find it updated in only
+ * the next TE, hence switching to sw counter.
+ */
+ if (crtc_state->mode_flags & (I915_MODE_FLAG_DSI_USE_TE0 |
+ I915_MODE_FLAG_DSI_USE_TE1))
+ return 0;
+
+ /*
+ * On i965gm the hardware frame counter reads
+ * zero when the TV encoder is enabled :(
+ */
+ if (IS_I965GM(dev_priv) &&
+ (crtc_state->output_types & BIT(INTEL_OUTPUT_TVOUT)))
+ return 0;
+
+ if (DISPLAY_VER(dev_priv) >= 5 || IS_G4X(dev_priv))
+ return 0xffffffff; /* full 32 bit counter */
+ else if (DISPLAY_VER(dev_priv) >= 3)
+ return 0xffffff; /* only 24 bits of frame count */
+ else
+ return 0; /* Gen2 doesn't have a hardware frame counter */
+}
+
+void intel_crtc_vblank_on(const struct intel_crtc_state *crtc_state)
+{
+ struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
+
+ assert_vblank_disabled(&crtc->base);
+ drm_crtc_set_max_vblank_count(&crtc->base,
+ intel_crtc_max_vblank_count(crtc_state));
+ drm_crtc_vblank_on(&crtc->base);
+
+ /*
+ * Should really happen exactly when we enable the pipe
+ * but we want the frame counters in the trace, and that
+ * requires vblank support on some platforms/outputs.
+ */
+ trace_intel_pipe_enable(crtc);
+}
+
+void intel_crtc_vblank_off(const struct intel_crtc_state *crtc_state)
+{
+ struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
+
+ /*
+ * Should really happen exactly when we disable the pipe
+ * but we want the frame counters in the trace, and that
+ * requires vblank support on some platforms/outputs.
+ */
+ trace_intel_pipe_disable(crtc);
+
+ drm_crtc_vblank_off(&crtc->base);
+ assert_vblank_disabled(&crtc->base);
+}
+
+struct intel_crtc_state *intel_crtc_state_alloc(struct intel_crtc *crtc)
+{
+ struct intel_crtc_state *crtc_state;
+
+ crtc_state = kmalloc(sizeof(*crtc_state), GFP_KERNEL);
+
+ if (crtc_state)
+ intel_crtc_state_reset(crtc_state, crtc);
+
+ return crtc_state;
+}
+
+void intel_crtc_state_reset(struct intel_crtc_state *crtc_state,
+ struct intel_crtc *crtc)
+{
+ memset(crtc_state, 0, sizeof(*crtc_state));
+
+ __drm_atomic_helper_crtc_state_reset(&crtc_state->uapi, &crtc->base);
+
+ crtc_state->cpu_transcoder = INVALID_TRANSCODER;
+ crtc_state->master_transcoder = INVALID_TRANSCODER;
+ crtc_state->hsw_workaround_pipe = INVALID_PIPE;
+ crtc_state->scaler_state.scaler_id = -1;
+ crtc_state->mst_master_transcoder = INVALID_TRANSCODER;
+}
+
+static struct intel_crtc *intel_crtc_alloc(void)
+{
+ struct intel_crtc_state *crtc_state;
+ struct intel_crtc *crtc;
+
+ crtc = kzalloc(sizeof(*crtc), GFP_KERNEL);
+ if (!crtc)
+ return ERR_PTR(-ENOMEM);
+
+ crtc_state = intel_crtc_state_alloc(crtc);
+ if (!crtc_state) {
+ kfree(crtc);
+ return ERR_PTR(-ENOMEM);
+ }
+
+ crtc->base.state = &crtc_state->uapi;
+ crtc->config = crtc_state;
+
+ return crtc;
+}
+
+static void intel_crtc_free(struct intel_crtc *crtc)
+{
+ intel_crtc_destroy_state(&crtc->base, crtc->base.state);
+ kfree(crtc);
+}
+
+static void intel_crtc_destroy(struct drm_crtc *_crtc)
+{
+ struct intel_crtc *crtc = to_intel_crtc(_crtc);
+
+ cpu_latency_qos_remove_request(&crtc->vblank_pm_qos);
+
+ drm_crtc_cleanup(&crtc->base);
+ kfree(crtc);
+}
+
+static int intel_crtc_late_register(struct drm_crtc *crtc)
+{
+ intel_crtc_debugfs_add(crtc);
+ return 0;
+}
+
+#define INTEL_CRTC_FUNCS \
+ .set_config = drm_atomic_helper_set_config, \
+ .destroy = intel_crtc_destroy, \
+ .page_flip = drm_atomic_helper_page_flip, \
+ .atomic_duplicate_state = intel_crtc_duplicate_state, \
+ .atomic_destroy_state = intel_crtc_destroy_state, \
+ .set_crc_source = intel_crtc_set_crc_source, \
+ .verify_crc_source = intel_crtc_verify_crc_source, \
+ .get_crc_sources = intel_crtc_get_crc_sources, \
+ .late_register = intel_crtc_late_register
+
+static const struct drm_crtc_funcs bdw_crtc_funcs = {
+ INTEL_CRTC_FUNCS,
+
+ .get_vblank_counter = g4x_get_vblank_counter,
+ .enable_vblank = bdw_enable_vblank,
+ .disable_vblank = bdw_disable_vblank,
+ .get_vblank_timestamp = intel_crtc_get_vblank_timestamp,
+};
+
+static const struct drm_crtc_funcs ilk_crtc_funcs = {
+ INTEL_CRTC_FUNCS,
+
+ .get_vblank_counter = g4x_get_vblank_counter,
+ .enable_vblank = ilk_enable_vblank,
+ .disable_vblank = ilk_disable_vblank,
+ .get_vblank_timestamp = intel_crtc_get_vblank_timestamp,
+};
+
+static const struct drm_crtc_funcs g4x_crtc_funcs = {
+ INTEL_CRTC_FUNCS,
+
+ .get_vblank_counter = g4x_get_vblank_counter,
+ .enable_vblank = i965_enable_vblank,
+ .disable_vblank = i965_disable_vblank,
+ .get_vblank_timestamp = intel_crtc_get_vblank_timestamp,
+};
+
+static const struct drm_crtc_funcs i965_crtc_funcs = {
+ INTEL_CRTC_FUNCS,
+
+ .get_vblank_counter = i915_get_vblank_counter,
+ .enable_vblank = i965_enable_vblank,
+ .disable_vblank = i965_disable_vblank,
+ .get_vblank_timestamp = intel_crtc_get_vblank_timestamp,
+};
+
+static const struct drm_crtc_funcs i915gm_crtc_funcs = {
+ INTEL_CRTC_FUNCS,
+
+ .get_vblank_counter = i915_get_vblank_counter,
+ .enable_vblank = i915gm_enable_vblank,
+ .disable_vblank = i915gm_disable_vblank,
+ .get_vblank_timestamp = intel_crtc_get_vblank_timestamp,
+};
+
+static const struct drm_crtc_funcs i915_crtc_funcs = {
+ INTEL_CRTC_FUNCS,
+
+ .get_vblank_counter = i915_get_vblank_counter,
+ .enable_vblank = i8xx_enable_vblank,
+ .disable_vblank = i8xx_disable_vblank,
+ .get_vblank_timestamp = intel_crtc_get_vblank_timestamp,
+};
+
+static const struct drm_crtc_funcs i8xx_crtc_funcs = {
+ INTEL_CRTC_FUNCS,
+
+ /* no hw vblank counter */
+ .enable_vblank = i8xx_enable_vblank,
+ .disable_vblank = i8xx_disable_vblank,
+ .get_vblank_timestamp = intel_crtc_get_vblank_timestamp,
+};
+
+int intel_crtc_init(struct drm_i915_private *dev_priv, enum pipe pipe)
+{
+ struct intel_plane *primary, *cursor;
+ const struct drm_crtc_funcs *funcs;
+ struct intel_crtc *crtc;
+ int sprite, ret;
+
+ crtc = intel_crtc_alloc();
+ if (IS_ERR(crtc))
+ return PTR_ERR(crtc);
+
+ crtc->pipe = pipe;
+ crtc->num_scalers = RUNTIME_INFO(dev_priv)->num_scalers[pipe];
+
+ if (DISPLAY_VER(dev_priv) >= 9)
+ primary = skl_universal_plane_create(dev_priv, pipe,
+ PLANE_PRIMARY);
+ else
+ primary = intel_primary_plane_create(dev_priv, pipe);
+ if (IS_ERR(primary)) {
+ ret = PTR_ERR(primary);
+ goto fail;
+ }
+ crtc->plane_ids_mask |= BIT(primary->id);
+
+ for_each_sprite(dev_priv, pipe, sprite) {
+ struct intel_plane *plane;
+
+ if (DISPLAY_VER(dev_priv) >= 9)
+ plane = skl_universal_plane_create(dev_priv, pipe,
+ PLANE_SPRITE0 + sprite);
+ else
+ plane = intel_sprite_plane_create(dev_priv, pipe, sprite);
+ if (IS_ERR(plane)) {
+ ret = PTR_ERR(plane);
+ goto fail;
+ }
+ crtc->plane_ids_mask |= BIT(plane->id);
+ }
+
+ cursor = intel_cursor_plane_create(dev_priv, pipe);
+ if (IS_ERR(cursor)) {
+ ret = PTR_ERR(cursor);
+ goto fail;
+ }
+ crtc->plane_ids_mask |= BIT(cursor->id);
+
+ if (HAS_GMCH(dev_priv)) {
+ if (IS_CHERRYVIEW(dev_priv) ||
+ IS_VALLEYVIEW(dev_priv) || IS_G4X(dev_priv))
+ funcs = &g4x_crtc_funcs;
+ else if (DISPLAY_VER(dev_priv) == 4)
+ funcs = &i965_crtc_funcs;
+ else if (IS_I945GM(dev_priv) || IS_I915GM(dev_priv))
+ funcs = &i915gm_crtc_funcs;
+ else if (DISPLAY_VER(dev_priv) == 3)
+ funcs = &i915_crtc_funcs;
+ else
+ funcs = &i8xx_crtc_funcs;
+ } else {
+ if (DISPLAY_VER(dev_priv) >= 8)
+ funcs = &bdw_crtc_funcs;
+ else
+ funcs = &ilk_crtc_funcs;
+ }
+
+ ret = drm_crtc_init_with_planes(&dev_priv->drm, &crtc->base,
+ &primary->base, &cursor->base,
+ funcs, "pipe %c", pipe_name(pipe));
+ if (ret)
+ goto fail;
+
+ if (DISPLAY_VER(dev_priv) >= 11)
+ drm_crtc_create_scaling_filter_property(&crtc->base,
+ BIT(DRM_SCALING_FILTER_DEFAULT) |
+ BIT(DRM_SCALING_FILTER_NEAREST_NEIGHBOR));
+
+ intel_color_init(crtc);
+
+ intel_crtc_drrs_init(crtc);
+ intel_crtc_crc_init(crtc);
+
+ cpu_latency_qos_add_request(&crtc->vblank_pm_qos, PM_QOS_DEFAULT_VALUE);
+
+ drm_WARN_ON(&dev_priv->drm, drm_crtc_index(&crtc->base) != crtc->pipe);
+
+ return 0;
+
+fail:
+ intel_crtc_free(crtc);
+
+ return ret;
+}
+
+static bool intel_crtc_needs_vblank_work(const struct intel_crtc_state *crtc_state)
+{
+ return crtc_state->hw.active &&
+ !intel_crtc_needs_modeset(crtc_state) &&
+ !crtc_state->preload_luts &&
+ (crtc_state->uapi.color_mgmt_changed ||
+ crtc_state->update_pipe);
+}
+
+static void intel_crtc_vblank_work(struct kthread_work *base)
+{
+ struct drm_vblank_work *work = to_drm_vblank_work(base);
+ struct intel_crtc_state *crtc_state =
+ container_of(work, typeof(*crtc_state), vblank_work);
+ struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
+
+ trace_intel_crtc_vblank_work_start(crtc);
+
+ intel_color_load_luts(crtc_state);
+
+ if (crtc_state->uapi.event) {
+ spin_lock_irq(&crtc->base.dev->event_lock);
+ drm_crtc_send_vblank_event(&crtc->base, crtc_state->uapi.event);
+ crtc_state->uapi.event = NULL;
+ spin_unlock_irq(&crtc->base.dev->event_lock);
+ }
+
+ trace_intel_crtc_vblank_work_end(crtc);
+}
+
+static void intel_crtc_vblank_work_init(struct intel_crtc_state *crtc_state)
+{
+ struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
+
+ drm_vblank_work_init(&crtc_state->vblank_work, &crtc->base,
+ intel_crtc_vblank_work);
+ /*
+ * Interrupt latency is critical for getting the vblank
+ * work executed as early as possible during the vblank.
+ */
+ cpu_latency_qos_update_request(&crtc->vblank_pm_qos, 0);
+}
+
+void intel_wait_for_vblank_workers(struct intel_atomic_state *state)
+{
+ struct intel_crtc_state *crtc_state;
+ struct intel_crtc *crtc;
+ int i;
+
+ for_each_new_intel_crtc_in_state(state, crtc, crtc_state, i) {
+ if (!intel_crtc_needs_vblank_work(crtc_state))
+ continue;
+
+ drm_vblank_work_flush(&crtc_state->vblank_work);
+ cpu_latency_qos_update_request(&crtc->vblank_pm_qos,
+ PM_QOS_DEFAULT_VALUE);
+ }
+}
+
+int intel_usecs_to_scanlines(const struct drm_display_mode *adjusted_mode,
+ int usecs)
+{
+ /* paranoia */
+ if (!adjusted_mode->crtc_htotal)
+ return 1;
+
+ return DIV_ROUND_UP(usecs * adjusted_mode->crtc_clock,
+ 1000 * adjusted_mode->crtc_htotal);
+}
+
+static int intel_mode_vblank_start(const struct drm_display_mode *mode)
+{
+ int vblank_start = mode->crtc_vblank_start;
+
+ if (mode->flags & DRM_MODE_FLAG_INTERLACE)
+ vblank_start = DIV_ROUND_UP(vblank_start, 2);
+
+ return vblank_start;
+}
+
+/**
+ * intel_pipe_update_start() - start update of a set of display registers
+ * @new_crtc_state: the new crtc state
+ *
+ * Mark the start of an update to pipe registers that should be updated
+ * atomically regarding vblank. If the next vblank will happens within
+ * the next 100 us, this function waits until the vblank passes.
+ *
+ * After a successful call to this function, interrupts will be disabled
+ * until a subsequent call to intel_pipe_update_end(). That is done to
+ * avoid random delays.
+ */
+void intel_pipe_update_start(struct intel_crtc_state *new_crtc_state)
+{
+ struct intel_crtc *crtc = to_intel_crtc(new_crtc_state->uapi.crtc);
+ struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+ const struct drm_display_mode *adjusted_mode = &new_crtc_state->hw.adjusted_mode;
+ long timeout = msecs_to_jiffies_timeout(1);
+ int scanline, min, max, vblank_start;
+ wait_queue_head_t *wq = drm_crtc_vblank_waitqueue(&crtc->base);
+ bool need_vlv_dsi_wa = (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) &&
+ intel_crtc_has_type(new_crtc_state, INTEL_OUTPUT_DSI);
+ DEFINE_WAIT(wait);
+
+ intel_psr_lock(new_crtc_state);
+
+ if (new_crtc_state->do_async_flip)
+ return;
+
+ if (intel_crtc_needs_vblank_work(new_crtc_state))
+ intel_crtc_vblank_work_init(new_crtc_state);
+
+ if (new_crtc_state->vrr.enable) {
+ if (intel_vrr_is_push_sent(new_crtc_state))
+ vblank_start = intel_vrr_vmin_vblank_start(new_crtc_state);
+ else
+ vblank_start = intel_vrr_vmax_vblank_start(new_crtc_state);
+ } else {
+ vblank_start = intel_mode_vblank_start(adjusted_mode);
+ }
+
+ /* FIXME needs to be calibrated sensibly */
+ min = vblank_start - intel_usecs_to_scanlines(adjusted_mode,
+ VBLANK_EVASION_TIME_US);
+ max = vblank_start - 1;
+
+ if (min <= 0 || max <= 0)
+ goto irq_disable;
+
+ if (drm_WARN_ON(&dev_priv->drm, drm_crtc_vblank_get(&crtc->base)))
+ goto irq_disable;
+
+ /*
+ * Wait for psr to idle out after enabling the VBL interrupts
+ * VBL interrupts will start the PSR exit and prevent a PSR
+ * re-entry as well.
+ */
+ intel_psr_wait_for_idle_locked(new_crtc_state);
+
+ local_irq_disable();
+
+ crtc->debug.min_vbl = min;
+ crtc->debug.max_vbl = max;
+ trace_intel_pipe_update_start(crtc);
+
+ for (;;) {
+ /*
+ * prepare_to_wait() has a memory barrier, which guarantees
+ * other CPUs can see the task state update by the time we
+ * read the scanline.
+ */
+ prepare_to_wait(wq, &wait, TASK_UNINTERRUPTIBLE);
+
+ scanline = intel_get_crtc_scanline(crtc);
+ if (scanline < min || scanline > max)
+ break;
+
+ if (!timeout) {
+ drm_err(&dev_priv->drm,
+ "Potential atomic update failure on pipe %c\n",
+ pipe_name(crtc->pipe));
+ break;
+ }
+
+ local_irq_enable();
+
+ timeout = schedule_timeout(timeout);
+
+ local_irq_disable();
+ }
+
+ finish_wait(wq, &wait);
+
+ drm_crtc_vblank_put(&crtc->base);
+
+ /*
+ * On VLV/CHV DSI the scanline counter would appear to
+ * increment approx. 1/3 of a scanline before start of vblank.
+ * The registers still get latched at start of vblank however.
+ * This means we must not write any registers on the first
+ * line of vblank (since not the whole line is actually in
+ * vblank). And unfortunately we can't use the interrupt to
+ * wait here since it will fire too soon. We could use the
+ * frame start interrupt instead since it will fire after the
+ * critical scanline, but that would require more changes
+ * in the interrupt code. So for now we'll just do the nasty
+ * thing and poll for the bad scanline to pass us by.
+ *
+ * FIXME figure out if BXT+ DSI suffers from this as well
+ */
+ while (need_vlv_dsi_wa && scanline == vblank_start)
+ scanline = intel_get_crtc_scanline(crtc);
+
+ crtc->debug.scanline_start = scanline;
+ crtc->debug.start_vbl_time = ktime_get();
+ crtc->debug.start_vbl_count = intel_crtc_get_vblank_counter(crtc);
+
+ trace_intel_pipe_update_vblank_evaded(crtc);
+ return;
+
+irq_disable:
+ local_irq_disable();
+}
+
+#if IS_ENABLED(CONFIG_DRM_I915_DEBUG_VBLANK_EVADE)
+static void dbg_vblank_evade(struct intel_crtc *crtc, ktime_t end)
+{
+ u64 delta = ktime_to_ns(ktime_sub(end, crtc->debug.start_vbl_time));
+ unsigned int h;
+
+ h = ilog2(delta >> 9);
+ if (h >= ARRAY_SIZE(crtc->debug.vbl.times))
+ h = ARRAY_SIZE(crtc->debug.vbl.times) - 1;
+ crtc->debug.vbl.times[h]++;
+
+ crtc->debug.vbl.sum += delta;
+ if (!crtc->debug.vbl.min || delta < crtc->debug.vbl.min)
+ crtc->debug.vbl.min = delta;
+ if (delta > crtc->debug.vbl.max)
+ crtc->debug.vbl.max = delta;
+
+ if (delta > 1000 * VBLANK_EVASION_TIME_US) {
+ drm_dbg_kms(crtc->base.dev,
+ "Atomic update on pipe (%c) took %lld us, max time under evasion is %u us\n",
+ pipe_name(crtc->pipe),
+ div_u64(delta, 1000),
+ VBLANK_EVASION_TIME_US);
+ crtc->debug.vbl.over++;
+ }
+}
+#else
+static void dbg_vblank_evade(struct intel_crtc *crtc, ktime_t end) {}
+#endif
+
+/**
+ * intel_pipe_update_end() - end update of a set of display registers
+ * @new_crtc_state: the new crtc state
+ *
+ * Mark the end of an update started with intel_pipe_update_start(). This
+ * re-enables interrupts and verifies the update was actually completed
+ * before a vblank.
+ */
+void intel_pipe_update_end(struct intel_crtc_state *new_crtc_state)
+{
+ struct intel_crtc *crtc = to_intel_crtc(new_crtc_state->uapi.crtc);
+ enum pipe pipe = crtc->pipe;
+ int scanline_end = intel_get_crtc_scanline(crtc);
+ u32 end_vbl_count = intel_crtc_get_vblank_counter(crtc);
+ ktime_t end_vbl_time = ktime_get();
+ struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+
+ intel_psr_unlock(new_crtc_state);
+
+ if (new_crtc_state->do_async_flip)
+ return;
+
+ trace_intel_pipe_update_end(crtc, end_vbl_count, scanline_end);
+
+ /*
+ * Incase of mipi dsi command mode, we need to set frame update
+ * request for every commit.
+ */
+ if (DISPLAY_VER(dev_priv) >= 11 &&
+ intel_crtc_has_type(new_crtc_state, INTEL_OUTPUT_DSI))
+ icl_dsi_frame_update(new_crtc_state);
+
+ /* We're still in the vblank-evade critical section, this can't race.
+ * Would be slightly nice to just grab the vblank count and arm the
+ * event outside of the critical section - the spinlock might spin for a
+ * while ... */
+ if (intel_crtc_needs_vblank_work(new_crtc_state)) {
+ drm_vblank_work_schedule(&new_crtc_state->vblank_work,
+ drm_crtc_accurate_vblank_count(&crtc->base) + 1,
+ false);
+ } else if (new_crtc_state->uapi.event) {
+ drm_WARN_ON(&dev_priv->drm,
+ drm_crtc_vblank_get(&crtc->base) != 0);
+
+ spin_lock(&crtc->base.dev->event_lock);
+ drm_crtc_arm_vblank_event(&crtc->base,
+ new_crtc_state->uapi.event);
+ spin_unlock(&crtc->base.dev->event_lock);
+
+ new_crtc_state->uapi.event = NULL;
+ }
+
+ /*
+ * Send VRR Push to terminate Vblank. If we are already in vblank
+ * this has to be done _after_ sampling the frame counter, as
+ * otherwise the push would immediately terminate the vblank and
+ * the sampled frame counter would correspond to the next frame
+ * instead of the current frame.
+ *
+ * There is a tiny race here (iff vblank evasion failed us) where
+ * we might sample the frame counter just before vmax vblank start
+ * but the push would be sent just after it. That would cause the
+ * push to affect the next frame instead of the current frame,
+ * which would cause the next frame to terminate already at vmin
+ * vblank start instead of vmax vblank start.
+ */
+ intel_vrr_send_push(new_crtc_state);
+
+ local_irq_enable();
+
+ if (intel_vgpu_active(dev_priv))
+ return;
+
+ if (crtc->debug.start_vbl_count &&
+ crtc->debug.start_vbl_count != end_vbl_count) {
+ drm_err(&dev_priv->drm,
+ "Atomic update failure on pipe %c (start=%u end=%u) time %lld us, min %d, max %d, scanline start %d, end %d\n",
+ pipe_name(pipe), crtc->debug.start_vbl_count,
+ end_vbl_count,
+ ktime_us_delta(end_vbl_time,
+ crtc->debug.start_vbl_time),
+ crtc->debug.min_vbl, crtc->debug.max_vbl,
+ crtc->debug.scanline_start, scanline_end);
+ }
+
+ dbg_vblank_evade(crtc, end_vbl_time);
+}