From: Gustavo Padovan <[email protected]>
Add implementation for async plane update callbacks
Signed-off-by: Gustavo Padovan <[email protected]>
Signed-off-by: Enric Balletbo i Serra <[email protected]>
Signed-off-by: Tina Zhang <[email protected]>
Signed-off-by: Helen Koike <[email protected]>
Tested-by: Tina Zhang <[email protected]>
---
Hi,
I tested this patch set with igt (ksm_cursor_legacy and plane_cursor_legacy)
and found no regressions.
This patch depends on [1] "[PATCH] drm: don't block fb changes for async plane updates",
which is already on drm-misc, otherwise there will be a regression on igt tests:
cursor-vs-flip-atomic-transitions-varying-size
cursor-vs-flip-toggle
cursor-vs-flip-varying-size
with errors of type:
"CRITICAL: completed 97 cursor updated in a period of 30 flips, we
expect to complete approximately 15360 updates, with the threshold set
at 7680"
When picking this patch, please backmerge [1] into drm-intel tree.
[1] https://cgit.freedesktop.org/drm/drm-misc/commit/?h=drm-misc-fixes&id=89a4aac0ab0e6f5eea10d7bf4869dd15c3de2cd4
Thanks
Helen
Changes in v9:
- v8: https://patchwork.kernel.org/patch/10843395/
- Added tested-by tag
- submitted to [email protected] to invoke CI
- rebased and fixed conflicts on top of drm-tip
Changes in v8:
- v7: https://lkml.org/lkml/2018/6/8/168
- v7 was splited in two, one that adds the async callbacks and another
that updates the cursor.
- rebase with drm-intel
- allow async update in all types of planes, not only cursor
- add watermark checks in async update
- remove bypass of intel_prepare_plane_fb() in case of async update
- add missing drm_atomic_helper_cleanup_planes(dev, state) call in
intel_atomic_commit().
- use swap() function in async update to set the old_fb in the
new_state object.
- use helpers intel_update_plane()/intel_disable_plane()
Changes in v7:
- Rebase on top of drm-intel repository. Hopefully now will play
nicely with autobuilders.
Changes in v6:
- Rework the intel_plane_atomic_async_update due driver changed from
last time.
- Removed the mutex_lock/unlock as causes a deadlock.
Changes in v5:
- Call drm_atomic_helper_async_check() from the check hook
Changes in v4:
- Set correct vma to new state for cleanup
- Move size checks back to drivers (Ville Syrjälä)
Changes in v3:
- Move fb setting to core and use new state (Eric Anholt)
.../gpu/drm/i915/display/intel_atomic_plane.c | 71 +++++++++++++++++++
drivers/gpu/drm/i915/display/intel_display.c | 9 +++
2 files changed, 80 insertions(+)
diff --git a/drivers/gpu/drm/i915/display/intel_atomic_plane.c b/drivers/gpu/drm/i915/display/intel_atomic_plane.c
index 30bd4e76fff9..56881a7ec48e 100644
--- a/drivers/gpu/drm/i915/display/intel_atomic_plane.c
+++ b/drivers/gpu/drm/i915/display/intel_atomic_plane.c
@@ -348,8 +348,79 @@ void i9xx_update_planes_on_crtc(struct intel_atomic_state *state,
}
}
+static int intel_plane_atomic_async_check(struct drm_plane *plane,
+ struct drm_plane_state *state)
+{
+ struct drm_crtc_state *crtc_state;
+
+ crtc_state = drm_atomic_get_existing_crtc_state(state->state,
+ state->crtc);
+ if (WARN_ON(!crtc_state))
+ return -EINVAL;
+
+ /*
+ * When crtc is inactive or there is a modeset pending,
+ * wait for it to complete in the slowpath
+ */
+ if (!crtc_state->active || to_intel_crtc_state(crtc_state)->update_pipe)
+ return -EINVAL;
+
+ /*
+ * If any parameters change that may affect watermarks,
+ * take the slowpath. Only changing fb or position should be
+ * in the fastpath.
+ */
+ if (plane->state->crtc != state->crtc ||
+ plane->state->src_w != state->src_w ||
+ plane->state->src_h != state->src_h ||
+ plane->state->crtc_w != state->crtc_w ||
+ plane->state->crtc_h != state->crtc_h ||
+ !plane->state->fb != !state->fb)
+ return -EINVAL;
+
+ return 0;
+}
+
+static void intel_plane_atomic_async_update(struct drm_plane *plane,
+ struct drm_plane_state *new_state)
+{
+ struct intel_atomic_state *intel_new_state =
+ to_intel_atomic_state(new_state->state);
+ struct intel_plane *intel_plane = to_intel_plane(plane);
+ struct drm_crtc *crtc = plane->state->crtc;
+ struct intel_crtc_state *new_crtc_state;
+ struct intel_crtc *intel_crtc;
+ int i;
+
+ for_each_new_intel_crtc_in_state(intel_new_state, intel_crtc,
+ new_crtc_state, i)
+ WARN_ON(new_crtc_state->wm.need_postvbl_update ||
+ new_crtc_state->update_wm_post);
+
+ i915_gem_track_fb(intel_fb_obj(plane->state->fb),
+ intel_fb_obj(new_state->fb),
+ intel_plane->frontbuffer_bit);
+
+ plane->state->src_x = new_state->src_x;
+ plane->state->src_y = new_state->src_y;
+ plane->state->crtc_x = new_state->crtc_x;
+ plane->state->crtc_y = new_state->crtc_y;
+
+ swap(plane->state->fb, new_state->fb);
+
+ if (plane->state->visible)
+ intel_update_plane(intel_plane,
+ to_intel_crtc_state(crtc->state),
+ to_intel_plane_state(plane->state));
+ else
+ intel_disable_plane(intel_plane,
+ to_intel_crtc_state(crtc->state));
+}
+
const struct drm_plane_helper_funcs intel_plane_helper_funcs = {
.prepare_fb = intel_prepare_plane_fb,
.cleanup_fb = intel_cleanup_plane_fb,
.atomic_check = intel_plane_atomic_check,
+ .atomic_async_check = intel_plane_atomic_async_check,
+ .atomic_async_update = intel_plane_atomic_async_update,
};
diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index 8d7e4c8b60bc..bf505b70a037 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -14007,6 +14007,15 @@ static int intel_atomic_commit(struct drm_device *dev,
struct drm_i915_private *dev_priv = to_i915(dev);
int ret = 0;
+ if (state->async_update) {
+ ret = drm_atomic_helper_prepare_planes(dev, state);
+ if (ret)
+ return ret;
+ drm_atomic_helper_async_commit(dev, state);
+ drm_atomic_helper_cleanup_planes(dev, state);
+ return 0;
+ }
+
intel_state->wakeref = intel_runtime_pm_get(&dev_priv->runtime_pm);
drm_atomic_state_get(state);
--
2.20.1
From: Gustavo Padovan <[email protected]>
Replace the legacy cursor implementation by the async callbacks
Signed-off-by: Gustavo Padovan <[email protected]>
Signed-off-by: Enric Balletbo i Serra <[email protected]>
Signed-off-by: Helen Koike <[email protected]>
---
Changes in v9:
- v8: https://patchwork.kernel.org/patch/10843397/
- rebased and fixed conflicts on top of drm-tip
Changes in v8:
- v7: https://lkml.org/lkml/2018/6/8/168
- v7 was splited in two, one that adds the async callbacks and another
that updates the cursor.
- Update comment in intel_pm.c that was referencing
intel_plane_atomic_async_update()
Changes in v7: None
Changes in v6: None
Changes in v5: None
Changes in v4: None
Changes in v3: None
drivers/gpu/drm/i915/display/intel_display.c | 165 +------------------
drivers/gpu/drm/i915/intel_pm.c | 2 +-
2 files changed, 6 insertions(+), 161 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index bf505b70a037..8aee8f0f83cb 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -13505,6 +13505,10 @@ static int intel_atomic_check(struct drm_device *dev,
if (ret)
goto fail;
+ if (_state->legacy_cursor_update)
+ _state->async_update = !drm_atomic_helper_async_check(dev,
+ _state);
+
intel_fbc_choose_crtc(dev_priv, state);
ret = calc_watermark_data(state);
if (ret)
@@ -14022,34 +14026,6 @@ static int intel_atomic_commit(struct drm_device *dev,
i915_sw_fence_init(&intel_state->commit_ready,
intel_atomic_commit_ready);
- /*
- * The intel_legacy_cursor_update() fast path takes care
- * of avoiding the vblank waits for simple cursor
- * movement and flips. For cursor on/off and size changes,
- * we want to perform the vblank waits so that watermark
- * updates happen during the correct frames. Gen9+ have
- * double buffered watermarks and so shouldn't need this.
- *
- * Unset state->legacy_cursor_update before the call to
- * drm_atomic_helper_setup_commit() because otherwise
- * drm_atomic_helper_wait_for_flip_done() is a noop and
- * we get FIFO underruns because we didn't wait
- * for vblank.
- *
- * FIXME doing watermarks and fb cleanup from a vblank worker
- * (assuming we had any) would solve these problems.
- */
- if (INTEL_GEN(dev_priv) < 9 && state->legacy_cursor_update) {
- struct intel_crtc_state *new_crtc_state;
- struct intel_crtc *crtc;
- int i;
-
- for_each_new_intel_crtc_in_state(intel_state, crtc, new_crtc_state, i)
- if (new_crtc_state->wm.need_postvbl_update ||
- new_crtc_state->update_wm_post)
- state->legacy_cursor_update = false;
- }
-
ret = intel_atomic_prepare_commit(dev, state);
if (ret) {
DRM_DEBUG_ATOMIC("Preparing state failed with %i\n", ret);
@@ -14555,139 +14531,8 @@ static const struct drm_plane_funcs i8xx_plane_funcs = {
.format_mod_supported = i8xx_plane_format_mod_supported,
};
-static int
-intel_legacy_cursor_update(struct drm_plane *plane,
- struct drm_crtc *crtc,
- struct drm_framebuffer *fb,
- int crtc_x, int crtc_y,
- unsigned int crtc_w, unsigned int crtc_h,
- u32 src_x, u32 src_y,
- u32 src_w, u32 src_h,
- struct drm_modeset_acquire_ctx *ctx)
-{
- struct drm_i915_private *dev_priv = to_i915(crtc->dev);
- int ret;
- struct drm_plane_state *old_plane_state, *new_plane_state;
- struct intel_plane *intel_plane = to_intel_plane(plane);
- struct drm_framebuffer *old_fb;
- struct intel_crtc_state *crtc_state =
- to_intel_crtc_state(crtc->state);
- struct intel_crtc_state *new_crtc_state;
-
- /*
- * When crtc is inactive or there is a modeset pending,
- * wait for it to complete in the slowpath
- */
- if (!crtc_state->base.active || needs_modeset(&crtc_state->base) ||
- crtc_state->update_pipe)
- goto slow;
-
- old_plane_state = plane->state;
- /*
- * Don't do an async update if there is an outstanding commit modifying
- * the plane. This prevents our async update's changes from getting
- * overridden by a previous synchronous update's state.
- */
- if (old_plane_state->commit &&
- !try_wait_for_completion(&old_plane_state->commit->hw_done))
- goto slow;
-
- /*
- * If any parameters change that may affect watermarks,
- * take the slowpath. Only changing fb or position should be
- * in the fastpath.
- */
- if (old_plane_state->crtc != crtc ||
- old_plane_state->src_w != src_w ||
- old_plane_state->src_h != src_h ||
- old_plane_state->crtc_w != crtc_w ||
- old_plane_state->crtc_h != crtc_h ||
- !old_plane_state->fb != !fb)
- goto slow;
-
- new_plane_state = intel_plane_duplicate_state(plane);
- if (!new_plane_state)
- return -ENOMEM;
-
- new_crtc_state = to_intel_crtc_state(intel_crtc_duplicate_state(crtc));
- if (!new_crtc_state) {
- ret = -ENOMEM;
- goto out_free;
- }
-
- drm_atomic_set_fb_for_plane(new_plane_state, fb);
-
- new_plane_state->src_x = src_x;
- new_plane_state->src_y = src_y;
- new_plane_state->src_w = src_w;
- new_plane_state->src_h = src_h;
- new_plane_state->crtc_x = crtc_x;
- new_plane_state->crtc_y = crtc_y;
- new_plane_state->crtc_w = crtc_w;
- new_plane_state->crtc_h = crtc_h;
-
- ret = intel_plane_atomic_check_with_state(crtc_state, new_crtc_state,
- to_intel_plane_state(old_plane_state),
- to_intel_plane_state(new_plane_state));
- if (ret)
- goto out_free;
-
- ret = mutex_lock_interruptible(&dev_priv->drm.struct_mutex);
- if (ret)
- goto out_free;
-
- ret = intel_plane_pin_fb(to_intel_plane_state(new_plane_state));
- if (ret)
- goto out_unlock;
-
- intel_fb_obj_flush(intel_fb_obj(fb), ORIGIN_FLIP);
-
- old_fb = old_plane_state->fb;
- i915_gem_track_fb(intel_fb_obj(old_fb), intel_fb_obj(fb),
- intel_plane->frontbuffer_bit);
-
- /* Swap plane state */
- plane->state = new_plane_state;
-
- /*
- * We cannot swap crtc_state as it may be in use by an atomic commit or
- * page flip that's running simultaneously. If we swap crtc_state and
- * destroy the old state, we will cause a use-after-free there.
- *
- * Only update active_planes, which is needed for our internal
- * bookkeeping. Either value will do the right thing when updating
- * planes atomically. If the cursor was part of the atomic update then
- * we would have taken the slowpath.
- */
- crtc_state->active_planes = new_crtc_state->active_planes;
-
- if (plane->state->visible)
- intel_update_plane(intel_plane, crtc_state,
- to_intel_plane_state(plane->state));
- else
- intel_disable_plane(intel_plane, crtc_state);
-
- intel_plane_unpin_fb(to_intel_plane_state(old_plane_state));
-
-out_unlock:
- mutex_unlock(&dev_priv->drm.struct_mutex);
-out_free:
- if (new_crtc_state)
- intel_crtc_destroy_state(crtc, &new_crtc_state->base);
- if (ret)
- intel_plane_destroy_state(plane, new_plane_state);
- else
- intel_plane_destroy_state(plane, old_plane_state);
- return ret;
-
-slow:
- return drm_atomic_helper_update_plane(plane, crtc, fb,
- crtc_x, crtc_y, crtc_w, crtc_h,
- src_x, src_y, src_w, src_h, ctx);
-}
-
static const struct drm_plane_funcs intel_cursor_plane_funcs = {
- .update_plane = intel_legacy_cursor_update,
+ .update_plane = drm_atomic_helper_update_plane,
.disable_plane = drm_atomic_helper_disable_plane,
.destroy = intel_plane_destroy,
.atomic_duplicate_state = intel_plane_duplicate_state,
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index d9a7a13ce32a..bf378197f59f 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -825,7 +825,7 @@ static bool intel_wm_plane_visible(const struct intel_crtc_state *crtc_state,
* can happen faster than the vrefresh rate, and the current
* watermark code doesn't handle that correctly. Cursor updates
* which set/clear the fb or change the cursor size are going
- * to get throttled by intel_legacy_cursor_update() to work
+ * to get throttled by intel_plane_atomic_async_update() to work
* around this problem with the watermark code.
*/
if (plane->id == PLANE_CURSOR)
--
2.20.1