[-PATCH v5 1/5] drm/i915: update cursors asynchronously through atomic

[-PATCH v5 1/5] drm/i915: update cursors asynchronously through atomic

[Gustavo Padovan]

From: Gustavo Padovan <gustavo.padovan@collabora.com>

Add support to async updates of cursors by using the new atomic
interface for that. Basically what this commit does is do what
intel_legacy_cursor_update() did but through atomic.

v4:
	- call drm_atomic_helper_async_check() from the check hook

v3:
	- set correct vma to new state for cleanup
	- move size checks back to drivers (Ville Syrjälä)

v2:
	- move fb setting to core and use new state (Eric Anholt)

Cc: Daniel Vetter <daniel.vetter@intel.com>
Cc: intel-gfx@lists.freedesktop.org
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.com>
---
 drivers/gpu/drm/i915/intel_atomic_plane.c |  73 ++++++++++++++
 drivers/gpu/drm/i915/intel_display.c      | 160 +++++-------------------------
 2 files changed, 100 insertions(+), 133 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_atomic_plane.c b/drivers/gpu/drm/i915/intel_atomic_plane.c
index ee76fab7bb6f..e5d64a206e75 100644
--- a/drivers/gpu/drm/i915/intel_atomic_plane.c
+++ b/drivers/gpu/drm/i915/intel_atomic_plane.c
@@ -245,11 +245,84 @@ static void intel_plane_atomic_update(struct drm_plane *plane,
 	}
 }
 
+static int intel_plane_atomic_async_check(struct drm_plane *plane,
+					  struct drm_plane_state *state)
+{
+	struct drm_crtc *crtc = plane->state->crtc;
+	struct drm_crtc_state *crtc_state = crtc->state;
+
+	if (plane->type != DRM_PLANE_TYPE_CURSOR)
+		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_plane *intel_plane = to_intel_plane(plane);
+	struct drm_crtc *crtc = plane->state->crtc;
+	struct drm_framebuffer *old_fb;
+	struct i915_vma *old_vma;
+
+	old_vma = to_intel_plane_state(plane->state)->vma;
+	old_fb = plane->state->fb;
+
+	i915_gem_track_fb(intel_fb_obj(old_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;
+	plane->state->fb = new_state->fb;
+	*to_intel_plane_state(plane->state) = *to_intel_plane_state(new_state);
+
+	to_intel_plane_state(new_state)->vma = old_vma;
+	new_state->fb = old_fb;
+
+	if (plane->state->visible) {
+		trace_intel_update_plane(plane, to_intel_crtc(crtc));
+		intel_plane->update_plane(intel_plane,
+					  to_intel_crtc_state(crtc->state),
+					  to_intel_plane_state(plane->state));
+	} else {
+		trace_intel_disable_plane(plane, to_intel_crtc(crtc));
+		intel_plane->disable_plane(intel_plane, to_intel_crtc(crtc));
+	}
+
+	mutex_lock(&plane->dev->struct_mutex);
+	intel_cleanup_plane_fb(plane, new_state);
+	mutex_unlock(&plane->dev->struct_mutex);
+}
+
 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_update = intel_plane_atomic_update,
+	.atomic_async_check = intel_plane_atomic_async_check,
+	.atomic_async_update = intel_plane_atomic_async_update,
 };
 
 /**
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 3f505682963f..8399f04a8ad2 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -12765,6 +12765,9 @@ static int intel_atomic_check(struct drm_device *dev,
 	if (ret)
 		return ret;
 
+	if (state->legacy_cursor_update)
+		state->async_update = !drm_atomic_helper_async_check(dev, state);
+
 	intel_fbc_choose_crtc(dev_priv, state);
 	return calc_watermark_data(state);
 }
@@ -13167,6 +13170,26 @@ static int intel_atomic_commit(struct drm_device *dev,
 	struct drm_i915_private *dev_priv = to_i915(dev);
 	int ret = 0;
 
+	/*
+	 * The atomic async 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.
+	 */
+	if (state->async_update) {
+		ret = mutex_lock_interruptible(&dev->struct_mutex);
+		if (ret)
+			return ret;
+
+		ret = drm_atomic_helper_prepare_planes(dev, state);
+		mutex_unlock(&dev->struct_mutex);
+
+		drm_atomic_helper_async_commit(dev, state);
+		return 0;
+	}
+
 	ret = drm_atomic_helper_setup_commit(state, nonblock);
 	if (ret)
 		return ret;
@@ -13295,6 +13318,9 @@ intel_prepare_plane_fb(struct drm_plane *plane,
 		}
 	}
 
+	if (new_state->state->async_update)
+		return 0;
+
 	if (!obj && !old_obj)
 		return 0;
 
@@ -13521,140 +13547,8 @@ const struct drm_plane_funcs intel_plane_funcs = {
 	.atomic_destroy_state = intel_plane_destroy_state,
 };
 
-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,
-			   uint32_t src_x, uint32_t src_y,
-			   uint32_t src_w, uint32_t 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 drm_crtc_state *crtc_state = crtc->state;
-	struct i915_vma *old_vma;
-
-	/*
-	 * When crtc is inactive or there is a modeset pending,
-	 * wait for it to complete in the slowpath
-	 */
-	if (!crtc_state->active || needs_modeset(crtc_state) ||
-	    to_intel_crtc_state(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;
-
-	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(to_intel_crtc_state(crtc->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;
-
-	if (INTEL_INFO(dev_priv)->cursor_needs_physical) {
-		int align = intel_cursor_alignment(dev_priv);
-
-		ret = i915_gem_object_attach_phys(intel_fb_obj(fb), align);
-		if (ret) {
-			DRM_DEBUG_KMS("failed to attach phys object\n");
-			goto out_unlock;
-		}
-	} else {
-		struct i915_vma *vma;
-
-		vma = intel_pin_and_fence_fb_obj(fb, new_plane_state->rotation);
-		if (IS_ERR(vma)) {
-			DRM_DEBUG_KMS("failed to pin object\n");
-
-			ret = PTR_ERR(vma);
-			goto out_unlock;
-		}
-
-		to_intel_plane_state(new_plane_state)->vma = vma;
-	}
-
-	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;
-
-	if (plane->state->visible) {
-		trace_intel_update_plane(plane, to_intel_crtc(crtc));
-		intel_plane->update_plane(intel_plane,
-					  to_intel_crtc_state(crtc->state),
-					  to_intel_plane_state(plane->state));
-	} else {
-		trace_intel_disable_plane(plane, to_intel_crtc(crtc));
-		intel_plane->disable_plane(intel_plane, to_intel_crtc(crtc));
-	}
-
-	old_vma = fetch_and_zero(&to_intel_plane_state(old_plane_state)->vma);
-	if (old_vma)
-		intel_unpin_fb_vma(old_vma);
-
-out_unlock:
-	mutex_unlock(&dev_priv->drm.struct_mutex);
-out_free:
-	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_get_property = intel_plane_atomic_get_property,
-- 
2.13.5

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[-PATCH v5 2/5] drm/i915: remove intel_cursor_plane_funcs

[Gustavo Padovan]

From: Gustavo Padovan <gustavo.padovan@collabora.com>

After converting legacy cursor updates to atomic async commits
intel_cursor_plane_funcs just duplicates intel_plane_funcs now.

Cc: Daniel Vetter <daniel.vetter@intel.com>
Cc: intel-gfx@lists.freedesktop.org
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.com>
---
 drivers/gpu/drm/i915/intel_display.c | 12 +-----------
 1 file changed, 1 insertion(+), 11 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 8399f04a8ad2..6af01d611b01 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -13547,16 +13547,6 @@ const struct drm_plane_funcs intel_plane_funcs = {
 	.atomic_destroy_state = intel_plane_destroy_state,
 };
 
-static const struct drm_plane_funcs intel_cursor_plane_funcs = {
-	.update_plane = drm_atomic_helper_update_plane,
-	.disable_plane = drm_atomic_helper_disable_plane,
-	.destroy = intel_plane_destroy,
-	.atomic_get_property = intel_plane_atomic_get_property,
-	.atomic_set_property = intel_plane_atomic_set_property,
-	.atomic_duplicate_state = intel_plane_duplicate_state,
-	.atomic_destroy_state = intel_plane_destroy_state,
-};
-
 static struct intel_plane *
 intel_primary_plane_create(struct drm_i915_private *dev_priv, enum pipe pipe)
 {
@@ -13721,7 +13711,7 @@ intel_cursor_plane_create(struct drm_i915_private *dev_priv,
 		cursor->cursor.size = ~0;
 
 	ret = drm_universal_plane_init(&dev_priv->drm, &cursor->base,
-				       0, &intel_cursor_plane_funcs,
+				       0, &intel_plane_funcs,
 				       intel_cursor_formats,
 				       ARRAY_SIZE(intel_cursor_formats),
 				       NULL, DRM_PLANE_TYPE_CURSOR,
-- 
2.13.5

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[-PATCH v5 3/5] drm/msm: update cursors asynchronously through atomic

[Gustavo Padovan]

From: Gustavo Padovan <gustavo.padovan@collabora.com>

Add support to async updates of cursors by using the new atomic
interface for that. Basically what this commit does is do what
mdp5_update_cursor_plane_legacy() did but through atomic.

v5: call drm_atomic_helper_async_check() from the check hook

v4: add missing atomic async commit call to msm_atomic_commit(Archit Taneja)

v3: move size checks back to drivers (Ville Syrjälä)

v2: move fb setting to core and use new state (Eric Anholt)

Cc: Rob Clark <robdclark@gmail.com>
Cc: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.com>
Tested-by: Archit Taneja <architt@codeaurora.org> (v4)
---
 drivers/gpu/drm/msm/mdp/mdp5/mdp5_plane.c | 151 +++++++++++++-----------------
 drivers/gpu/drm/msm/msm_atomic.c          |   9 ++
 2 files changed, 72 insertions(+), 88 deletions(-)

diff --git a/drivers/gpu/drm/msm/mdp/mdp5/mdp5_plane.c b/drivers/gpu/drm/msm/mdp/mdp5/mdp5_plane.c
index 4b22ac3413a1..83200bbf91f8 100644
--- a/drivers/gpu/drm/msm/mdp/mdp5/mdp5_plane.c
+++ b/drivers/gpu/drm/msm/mdp/mdp5/mdp5_plane.c
@@ -31,15 +31,6 @@ static int mdp5_plane_mode_set(struct drm_plane *plane,
 		struct drm_crtc *crtc, struct drm_framebuffer *fb,
 		struct drm_rect *src, struct drm_rect *dest);
 
-static int mdp5_update_cursor_plane_legacy(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,
-		uint32_t src_x, uint32_t src_y,
-		uint32_t src_w, uint32_t src_h,
-		struct drm_modeset_acquire_ctx *ctx);
-
 static struct mdp5_kms *get_kms(struct drm_plane *plane)
 {
 	struct msm_drm_private *priv = plane->dev->dev_private;
@@ -255,7 +246,7 @@ static const struct drm_plane_funcs mdp5_plane_funcs = {
 };
 
 static const struct drm_plane_funcs mdp5_cursor_plane_funcs = {
-		.update_plane = mdp5_update_cursor_plane_legacy,
+		.update_plane = drm_atomic_helper_update_plane,
 		.disable_plane = drm_atomic_helper_disable_plane,
 		.destroy = mdp5_plane_destroy,
 		.atomic_set_property = mdp5_plane_atomic_set_property,
@@ -487,11 +478,73 @@ static void mdp5_plane_atomic_update(struct drm_plane *plane,
 	}
 }
 
+static int mdp5_plane_atomic_async_check(struct drm_plane *plane,
+					 struct drm_plane_state *state)
+{
+	struct mdp5_plane_state *mdp5_state = to_mdp5_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;
+
+	if (!crtc_state->active)
+		return -EINVAL;
+
+	mdp5_state = to_mdp5_plane_state(state);
+
+	/* don't use fast path if we don't have a hwpipe allocated yet */
+	if (!mdp5_state->hwpipe)
+		return -EINVAL;
+
+	/* only allow changing of position(crtc x/y or src x/y) in fast path */
+	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 ||
+	    plane->state->fb != state->fb)
+		return -EINVAL;
+
+	return 0;
+}
+
+static void mdp5_plane_atomic_async_update(struct drm_plane *plane,
+					   struct drm_plane_state *new_state)
+{
+	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;
+
+	if (plane_enabled(new_state)) {
+		struct mdp5_ctl *ctl;
+		struct mdp5_pipeline *pipeline =
+					mdp5_crtc_get_pipeline(plane->crtc);
+		int ret;
+
+		ret = mdp5_plane_mode_set(plane, new_state->crtc, new_state->fb,
+				&new_state->src, &new_state->dst);
+		WARN_ON(ret < 0);
+
+		ctl = mdp5_crtc_get_ctl(new_state->crtc);
+
+		mdp5_ctl_commit(ctl, pipeline, mdp5_plane_get_flush(plane));
+	}
+
+	*to_mdp5_plane_state(plane->state) =
+		*to_mdp5_plane_state(new_state);
+}
+
 static const struct drm_plane_helper_funcs mdp5_plane_helper_funcs = {
 		.prepare_fb = mdp5_plane_prepare_fb,
 		.cleanup_fb = mdp5_plane_cleanup_fb,
 		.atomic_check = mdp5_plane_atomic_check,
 		.atomic_update = mdp5_plane_atomic_update,
+		.atomic_async_check = mdp5_plane_atomic_async_check,
+		.atomic_async_update = mdp5_plane_atomic_async_update,
 };
 
 static void set_scanout_locked(struct mdp5_kms *mdp5_kms,
@@ -996,84 +1049,6 @@ static int mdp5_plane_mode_set(struct drm_plane *plane,
 	return ret;
 }
 
-static int mdp5_update_cursor_plane_legacy(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,
-			uint32_t src_x, uint32_t src_y,
-			uint32_t src_w, uint32_t src_h,
-			struct drm_modeset_acquire_ctx *ctx)
-{
-	struct drm_plane_state *plane_state, *new_plane_state;
-	struct mdp5_plane_state *mdp5_pstate;
-	struct drm_crtc_state *crtc_state = crtc->state;
-	int ret;
-
-	if (!crtc_state->active || drm_atomic_crtc_needs_modeset(crtc_state))
-		goto slow;
-
-	plane_state = plane->state;
-	mdp5_pstate = to_mdp5_plane_state(plane_state);
-
-	/* don't use fast path if we don't have a hwpipe allocated yet */
-	if (!mdp5_pstate->hwpipe)
-		goto slow;
-
-	/* only allow changing of position(crtc x/y or src x/y) in fast path */
-	if (plane_state->crtc != crtc ||
-	    plane_state->src_w != src_w ||
-	    plane_state->src_h != src_h ||
-	    plane_state->crtc_w != crtc_w ||
-	    plane_state->crtc_h != crtc_h ||
-	    !plane_state->fb ||
-	    plane_state->fb != fb)
-		goto slow;
-
-	new_plane_state = mdp5_plane_duplicate_state(plane);
-	if (!new_plane_state)
-		return -ENOMEM;
-
-	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 = mdp5_plane_atomic_check_with_state(crtc_state, new_plane_state);
-	if (ret)
-		goto slow_free;
-
-	if (new_plane_state->visible) {
-		struct mdp5_ctl *ctl;
-		struct mdp5_pipeline *pipeline = mdp5_crtc_get_pipeline(crtc);
-
-		ret = mdp5_plane_mode_set(plane, crtc, fb,
-					  &new_plane_state->src,
-					  &new_plane_state->dst);
-		WARN_ON(ret < 0);
-
-		ctl = mdp5_crtc_get_ctl(crtc);
-
-		mdp5_ctl_commit(ctl, pipeline, mdp5_plane_get_flush(plane));
-	}
-
-	*to_mdp5_plane_state(plane_state) =
-		*to_mdp5_plane_state(new_plane_state);
-
-	mdp5_plane_destroy_state(plane, new_plane_state);
-
-	return 0;
-slow_free:
-	mdp5_plane_destroy_state(plane, new_plane_state);
-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);
-}
-
 /*
  * Use this func and the one below only after the atomic state has been
  * successfully swapped
diff --git a/drivers/gpu/drm/msm/msm_atomic.c b/drivers/gpu/drm/msm/msm_atomic.c
index 025d454163b0..24066a432e0b 100644
--- a/drivers/gpu/drm/msm/msm_atomic.c
+++ b/drivers/gpu/drm/msm/msm_atomic.c
@@ -172,6 +172,9 @@ int msm_atomic_check(struct drm_device *dev,
 	if (ret)
 		return ret;
 
+	if (state->legacy_cursor_update)
+		state->async_update = !drm_atomic_helper_async_check(dev, state);
+
 	return ret;
 }
 
@@ -202,6 +205,12 @@ int msm_atomic_commit(struct drm_device *dev,
 	if (ret)
 		return ret;
 
+	if (state->async_update) {
+		drm_atomic_helper_async_commit(dev, state);
+		drm_atomic_helper_cleanup_planes(dev, state);
+		return 0;
+	}
+
 	c = commit_init(state);
 	if (!c) {
 		ret = -ENOMEM;
-- 
2.13.5

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[-PATCH v5 4/5] drm/msm: remove mdp5_cursor_plane_funcs

[Gustavo Padovan]

From: Gustavo Padovan <gustavo.padovan@collabora.com>

After converting legacy cursor updates to atomic async commits
mdp5_cursor_plane_funcs just duplicates mdp5_plane_funcs now.

Cc: Rob Clark <robdclark@gmail.com>
Cc: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.com>
Tested-by: Archit Taneja <architt@codeaurora.org>
---
 drivers/gpu/drm/msm/mdp/mdp5/mdp5_plane.c | 26 ++++----------------------
 1 file changed, 4 insertions(+), 22 deletions(-)

diff --git a/drivers/gpu/drm/msm/mdp/mdp5/mdp5_plane.c b/drivers/gpu/drm/msm/mdp/mdp5/mdp5_plane.c
index 83200bbf91f8..1eee8c730665 100644
--- a/drivers/gpu/drm/msm/mdp/mdp5/mdp5_plane.c
+++ b/drivers/gpu/drm/msm/mdp/mdp5/mdp5_plane.c
@@ -245,18 +245,6 @@ static const struct drm_plane_funcs mdp5_plane_funcs = {
 		.atomic_print_state = mdp5_plane_atomic_print_state,
 };
 
-static const struct drm_plane_funcs mdp5_cursor_plane_funcs = {
-		.update_plane = drm_atomic_helper_update_plane,
-		.disable_plane = drm_atomic_helper_disable_plane,
-		.destroy = mdp5_plane_destroy,
-		.atomic_set_property = mdp5_plane_atomic_set_property,
-		.atomic_get_property = mdp5_plane_atomic_get_property,
-		.reset = mdp5_plane_reset,
-		.atomic_duplicate_state = mdp5_plane_duplicate_state,
-		.atomic_destroy_state = mdp5_plane_destroy_state,
-		.atomic_print_state = mdp5_plane_atomic_print_state,
-};
-
 static int mdp5_plane_prepare_fb(struct drm_plane *plane,
 				 struct drm_plane_state *new_state)
 {
@@ -1108,16 +1096,10 @@ struct drm_plane *mdp5_plane_init(struct drm_device *dev,
 	mdp5_plane->nformats = mdp_get_formats(mdp5_plane->formats,
 		ARRAY_SIZE(mdp5_plane->formats), false);
 
-	if (type == DRM_PLANE_TYPE_CURSOR)
-		ret = drm_universal_plane_init(dev, plane, 0xff,
-				&mdp5_cursor_plane_funcs,
-				mdp5_plane->formats, mdp5_plane->nformats,
-				NULL, type, NULL);
-	else
-		ret = drm_universal_plane_init(dev, plane, 0xff,
-				&mdp5_plane_funcs,
-				mdp5_plane->formats, mdp5_plane->nformats,
-				NULL, type, NULL);
+	ret = drm_universal_plane_init(dev, plane, 0xff, &mdp5_plane_funcs,
+				       mdp5_plane->formats,
+				       mdp5_plane->nformats,
+				       NULL, type, NULL);
 	if (ret)
 		goto fail;
 
-- 
2.13.5

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[-PATCH v5 5/5] drm/vc4: update cursors asynchronously through atomic

[Gustavo Padovan]

From: Gustavo Padovan <gustavo.padovan@collabora.com>

Add support for async updates of cursors by using the new atomic
interface for that. Basically what this commit does is do what
vc4_update_plane() did but through atomic.

v5: add missing call to vc4_plane_atomic_check() (Eric Anholt)

v4: add drm_atomic_helper_async() commit (Eric Anholt)

v3: move size checks back to drivers (Ville Syrjälä)

v2: move fb setting to core and use new state (Eric Anholt)

Cc: Eric Anholt <eric@anholt.net>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Eric Anholt <eric@anholt.net>
---
 drivers/gpu/drm/vc4/vc4_kms.c   |  20 +++++++
 drivers/gpu/drm/vc4/vc4_plane.c | 128 ++++++++++++++++------------------------
 2 files changed, 71 insertions(+), 77 deletions(-)

diff --git a/drivers/gpu/drm/vc4/vc4_kms.c b/drivers/gpu/drm/vc4/vc4_kms.c
index 50c4959b5bd3..e006b4849f73 100644
--- a/drivers/gpu/drm/vc4/vc4_kms.c
+++ b/drivers/gpu/drm/vc4/vc4_kms.c
@@ -96,6 +96,26 @@ static int vc4_atomic_commit(struct drm_device *dev,
 	struct vc4_dev *vc4 = to_vc4_dev(dev);
 	int ret;
 
+	if (state->async_update) {
+		ret = down_interruptible(&vc4->async_modeset);
+		if (ret)
+			return ret;
+
+		ret = drm_atomic_helper_prepare_planes(dev, state);
+		if (ret) {
+			up(&vc4->async_modeset);
+			return ret;
+		}
+
+		drm_atomic_helper_async_commit(dev, state);
+
+		drm_atomic_helper_cleanup_planes(dev, state);
+
+		up(&vc4->async_modeset);
+
+		return 0;
+	}
+
 	ret = drm_atomic_helper_setup_commit(state, nonblock);
 	if (ret)
 		return ret;
diff --git a/drivers/gpu/drm/vc4/vc4_plane.c b/drivers/gpu/drm/vc4/vc4_plane.c
index 2968b3ebb895..36d41b172919 100644
--- a/drivers/gpu/drm/vc4/vc4_plane.c
+++ b/drivers/gpu/drm/vc4/vc4_plane.c
@@ -759,87 +759,41 @@ void vc4_plane_async_set_fb(struct drm_plane *plane, struct drm_framebuffer *fb)
 	vc4_state->dlist[vc4_state->ptr0_offset] = addr;
 }
 
-static int vc4_prepare_fb(struct drm_plane *plane,
-			  struct drm_plane_state *state)
+static int vc4_plane_atomic_async_check(struct drm_plane *plane,
+					struct drm_plane_state *state)
 {
-	struct vc4_bo *bo;
-	struct dma_fence *fence;
+	if (plane != state->crtc->cursor)
+		return -EINVAL;
 
-	if ((plane->state->fb == state->fb) || !state->fb)
-		return 0;
+	if (!plane->state)
+		return -EINVAL;
 
-	bo = to_vc4_bo(&drm_fb_cma_get_gem_obj(state->fb, 0)->base);
-	fence = reservation_object_get_excl_rcu(bo->resv);
-	drm_atomic_set_fence_for_plane(state, fence);
+	/* No configuring new scaling in the fast path. */
+	if (state->crtc_w != plane->state->crtc_w ||
+	    state->crtc_h != plane->state->crtc_h ||
+	    state->src_w != plane->state->src_w ||
+	    state->src_h != plane->state->src_h) {
+		return -EINVAL;
+	}
 
 	return 0;
 }
 
-static const struct drm_plane_helper_funcs vc4_plane_helper_funcs = {
-	.atomic_check = vc4_plane_atomic_check,
-	.atomic_update = vc4_plane_atomic_update,
-	.prepare_fb = vc4_prepare_fb,
-};
-
-static void vc4_plane_destroy(struct drm_plane *plane)
-{
-	drm_plane_helper_disable(plane);
-	drm_plane_cleanup(plane);
-}
-
-/* Implements immediate (non-vblank-synced) updates of the cursor
- * position, or falls back to the atomic helper otherwise.
- */
-static int
-vc4_update_plane(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,
-		 uint32_t src_x, uint32_t src_y,
-		 uint32_t src_w, uint32_t src_h,
-		 struct drm_modeset_acquire_ctx *ctx)
+static void vc4_plane_atomic_async_update(struct drm_plane *plane,
+					  struct drm_plane_state *new_state)
 {
-	struct drm_plane_state *plane_state;
-	struct vc4_plane_state *vc4_state;
-
-	if (plane != crtc->cursor)
-		goto out;
-
-	plane_state = plane->state;
-	vc4_state = to_vc4_plane_state(plane_state);
-
-	if (!plane_state)
-		goto out;
-
-	/* No configuring new scaling in the fast path. */
-	if (crtc_w != plane_state->crtc_w ||
-	    crtc_h != plane_state->crtc_h ||
-	    src_w != plane_state->src_w ||
-	    src_h != plane_state->src_h) {
-		goto out;
-	}
-
-	if (fb != plane_state->fb) {
-		drm_atomic_set_fb_for_plane(plane->state, fb);
-		vc4_plane_async_set_fb(plane, fb);
-	}
+	struct vc4_plane_state *vc4_state = to_vc4_plane_state(plane->state);
 
-	/* Set the cursor's position on the screen.  This is the
-	 * expected change from the drm_mode_cursor_universal()
-	 * helper.
-	 */
-	plane_state->crtc_x = crtc_x;
-	plane_state->crtc_y = crtc_y;
+	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;
 
-	/* Allow changing the start position within the cursor BO, if
-	 * that matters.
-	 */
-	plane_state->src_x = src_x;
-	plane_state->src_y = src_y;
+	if (plane->state->fb != new_state->fb)
+		vc4_plane_async_set_fb(plane, new_state->fb);
 
 	/* Update the display list based on the new crtc_x/y. */
-	vc4_plane_atomic_check(plane, plane_state);
+	vc4_plane_atomic_check(plane, plane->state);
 
 	/* Note that we can't just call vc4_plane_write_dlist()
 	 * because that would smash the context data that the HVS is
@@ -851,20 +805,40 @@ vc4_update_plane(struct drm_plane *plane,
 	       &vc4_state->hw_dlist[vc4_state->pos2_offset]);
 	writel(vc4_state->dlist[vc4_state->ptr0_offset],
 	       &vc4_state->hw_dlist[vc4_state->ptr0_offset]);
+}
+
+static int vc4_prepare_fb(struct drm_plane *plane,
+			  struct drm_plane_state *state)
+{
+	struct vc4_bo *bo;
+	struct dma_fence *fence;
+
+	if ((plane->state->fb == state->fb) || !state->fb)
+		return 0;
+
+	bo = to_vc4_bo(&drm_fb_cma_get_gem_obj(state->fb, 0)->base);
+	fence = reservation_object_get_excl_rcu(bo->resv);
+	drm_atomic_set_fence_for_plane(state, fence);
 
 	return 0;
+}
+
+static const struct drm_plane_helper_funcs vc4_plane_helper_funcs = {
+	.atomic_check = vc4_plane_atomic_check,
+	.atomic_update = vc4_plane_atomic_update,
+	.atomic_async_check = vc4_plane_atomic_async_check,
+	.atomic_async_update = vc4_plane_atomic_async_update,
+	.prepare_fb = vc4_prepare_fb,
+};
 
-out:
-	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 void vc4_plane_destroy(struct drm_plane *plane)
+{
+	drm_plane_helper_disable(plane);
+	drm_plane_cleanup(plane);
 }
 
 static const struct drm_plane_funcs vc4_plane_funcs = {
-	.update_plane = vc4_update_plane,
+	.update_plane = drm_atomic_helper_update_plane,
 	.disable_plane = drm_atomic_helper_disable_plane,
 	.destroy = vc4_plane_destroy,
 	.set_property = NULL,
-- 
2.13.5

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Re: [-PATCH v5 1/5] drm/i915: update cursors asynchronously through atomic

[Chris Wilson]

Quoting Gustavo Padovan (2017-09-08 20:24:15)
> @@ -13167,6 +13170,26 @@ static int intel_atomic_commit(struct drm_device *dev,
>         struct drm_i915_private *dev_priv = to_i915(dev);
>         int ret = 0;
>  
> +       /*
> +        * The atomic async 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.
> +        */
> +       if (state->async_update) {
> +               ret = mutex_lock_interruptible(&dev->struct_mutex);
> +               if (ret)
> +                       return ret;

This deadlock should be found by the test suite, or else we are missing
tests!

> +
> +               ret = drm_atomic_helper_prepare_planes(dev, state);

And that will make adding the missing if (ret) return ret; easier.

> +               mutex_unlock(&dev->struct_mutex);
> +
> +               drm_atomic_helper_async_commit(dev, state);
> +               return 0;
> +       }
> +
>         ret = drm_atomic_helper_setup_commit(state, nonblock);
>         if (ret)
>                 return ret;
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Re: [-PATCH v5 1/5] drm/i915: update cursors asynchronously through atomic

[Gustavo Padovan]

2017-09-08 Chris Wilson <chris@chris-wilson.co.uk>:

> Quoting Gustavo Padovan (2017-09-08 20:24:15)
> > @@ -13167,6 +13170,26 @@ static int intel_atomic_commit(struct drm_device *dev,
> >         struct drm_i915_private *dev_priv = to_i915(dev);
> >         int ret = 0;
> >  
> > +       /*
> > +        * The atomic async 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.
> > +        */
> > +       if (state->async_update) {
> > +               ret = mutex_lock_interruptible(&dev->struct_mutex);
> > +               if (ret)
> > +                       return ret;
> 
> This deadlock should be found by the test suite, or else we are missing
> tests!

It seems that I missed the fact that the driver changed when I rebased and
resent. I'll investigate this further and come back with another patch.

Gustavo
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