[PATCH v3 0/6] drm: add asynchrounous plane update

[PATCH v3 0/6] drm: add asynchrounous plane update

[Gustavo Padovan]

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

Hi,

This is just a rebase on top of latest drm-misc-next. Last iteration
can be found here:

https://www.spinics.net/lists/intel-gfx/msg130582.html

Please review! Thanks,

       Gustavo

---
Gustavo Padovan (6):
  drm/atomic: initial support for asynchronous plane update
  drm/i915: update cursors asynchronously through atomic
  drm/i915: remove intel_cursor_plane_funcs
  drm/msm: update cursors asynchronously through atomic
  drm/msm: remove mdp5_cursor_plane_funcs
  drm/vc4: update cursors asynchronously through atomic

 drivers/gpu/drm/drm_atomic.c              |  70 ++++++++++++
 drivers/gpu/drm/drm_atomic_helper.c       |  35 ++++++
 drivers/gpu/drm/i915/intel_atomic_plane.c |  73 +++++++++++++
 drivers/gpu/drm/i915/intel_display.c      | 160 ++++-----------------------
 drivers/gpu/drm/msm/mdp/mdp5/mdp5_plane.c | 175 +++++++++++-------------------
 drivers/gpu/drm/msm/msm_atomic.c          |   6 +
 drivers/gpu/drm/vc4/vc4_kms.c             |  20 ++++
 drivers/gpu/drm/vc4/vc4_plane.c           | 128 +++++++++-------------
 include/drm/drm_atomic.h                  |   2 +
 include/drm/drm_atomic_helper.h           |   2 +
 include/drm/drm_modeset_helper_vtables.h  |  50 +++++++++
 11 files changed, 398 insertions(+), 323 deletions(-)

-- 
2.9.4

_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel

[PATCH v3 1/6] drm/atomic: initial support for asynchronous plane update

[Gustavo Padovan]

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

In some cases, like cursor updates, it is interesting to update the
plane in an asynchronous fashion to avoid big delays. The current queued
update could be still waiting for a fence to signal and thus block any
subsequent update until its scan out. In cases like this if we update the
cursor synchronously through the atomic API it will cause significant
delays that would even be noticed by the final user.

This patch creates a fast path to jump ahead the current queued state and
do single planes updates without going through all atomic steps in
drm_atomic_helper_commit(). We take this path for legacy cursor updates.

For now only single plane updates are supported, but we plan to support
multiple planes updates and async PageFlips through this interface as well
in the near future.

v5:
	- improve comments (Eric Anholt)

v4:
	- fix state->crtc NULL check (Archit Taneja)

v3:
	- fix iteration on the wrong crtc state
	- put back code to forbid updates if there is a queued update for
	the same plane (Ville Syrjälä)
	- move size checks back to drivers (Ville Syrjälä)
	- move ASYNC_UPDATE flag addition to its own patch (Ville Syrjälä)

v2:
	- allow updates even if there is a queued update for the same
	plane.
        - fixes on the documentation (Emil Velikov)
        - unconditionally call ->atomic_async_update (Emil Velikov)
        - check for ->atomic_async_update earlier (Daniel Vetter)
        - make ->atomic_async_check() the last step (Daniel Vetter)
        - add ASYNC_UPDATE flag (Eric Anholt)
        - update state in core after ->atomic_async_update (Eric Anholt)
	- update docs (Eric Anholt)

Cc: Daniel Vetter <daniel.vetter@intel.com>
Cc: Rob Clark <robdclark@gmail.com>
Cc: Eric Anholt <eric@anholt.net>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.com>
Reviewed-by: Archit Taneja <architt@codeaurora.org>
Acked-by: Eric Anholt <eric@anholt.net>
---
 drivers/gpu/drm/drm_atomic.c             | 70 ++++++++++++++++++++++++++++++++
 drivers/gpu/drm/drm_atomic_helper.c      | 35 ++++++++++++++++
 include/drm/drm_atomic.h                 |  2 +
 include/drm/drm_atomic_helper.h          |  2 +
 include/drm/drm_modeset_helper_vtables.h | 50 +++++++++++++++++++++++
 5 files changed, 159 insertions(+)

diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c
index c0f336d..e406688 100644
--- a/drivers/gpu/drm/drm_atomic.c
+++ b/drivers/gpu/drm/drm_atomic.c
@@ -644,6 +644,73 @@ static int drm_atomic_crtc_check(struct drm_crtc *crtc,
 	return 0;
 }
 
+static bool drm_atomic_async_check(struct drm_atomic_state *state)
+{
+	struct drm_crtc *crtc;
+	struct drm_crtc_state *crtc_state;
+	struct drm_crtc_commit *commit;
+	struct drm_plane *__plane, *plane = NULL;
+	struct drm_plane_state *__plane_state, *plane_state = NULL;
+	const struct drm_plane_helper_funcs *funcs;
+	int i, j, n_planes = 0;
+
+	for_each_new_crtc_in_state(state, crtc, crtc_state, i) {
+		if (drm_atomic_crtc_needs_modeset(crtc_state))
+			return false;
+	}
+
+	for_each_new_plane_in_state(state, __plane, __plane_state, i) {
+		n_planes++;
+		plane = __plane;
+		plane_state = __plane_state;
+	}
+
+	/* FIXME: we support only single plane updates for now */
+	if (!plane || n_planes != 1)
+		return false;
+
+	if (!plane_state->crtc)
+		return false;
+
+	funcs = plane->helper_private;
+	if (!funcs->atomic_async_update)
+		return false;
+
+	if (plane_state->fence)
+		return false;
+
+	/*
+	 * 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.
+	 */
+	for_each_new_crtc_in_state(state, crtc, crtc_state, i) {
+		if (plane->crtc != crtc)
+			continue;
+
+		spin_lock(&crtc->commit_lock);
+		commit = list_first_entry_or_null(&crtc->commit_list,
+						  struct drm_crtc_commit,
+						  commit_entry);
+		if (!commit) {
+			spin_unlock(&crtc->commit_lock);
+			continue;
+		}
+		spin_unlock(&crtc->commit_lock);
+
+		if (!crtc->state->state)
+			continue;
+
+		for_each_plane_in_state(crtc->state->state, __plane,
+					__plane_state, j) {
+			if (__plane == plane)
+				return false;
+		}
+	}
+
+	return !funcs->atomic_async_check(plane, plane_state);
+}
+
 static void drm_atomic_crtc_print_state(struct drm_printer *p,
 		const struct drm_crtc_state *state)
 {
@@ -1665,6 +1732,9 @@ int drm_atomic_check_only(struct drm_atomic_state *state)
 		}
 	}
 
+	if (state->legacy_cursor_update)
+		state->async_update = drm_atomic_async_check(state);
+
 	return ret;
 }
 EXPORT_SYMBOL(drm_atomic_check_only);
diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c
index c4e4e8b..8c4ee8b 100644
--- a/drivers/gpu/drm/drm_atomic_helper.c
+++ b/drivers/gpu/drm/drm_atomic_helper.c
@@ -1346,6 +1346,30 @@ static void commit_work(struct work_struct *work)
 }
 
 /**
+ * drm_atomic_helper_async_commit - commit state asynchronously
+ *
+ * This function commits a state asynchronously, i.e., not vblank
+ * synchronized. It should be used on a state only when
+ * drm_atomic_async_check() succeeds. Async commits are not supposed to swap
+ * the states like normal sync commits, but just do in-place changes on the
+ * current state.
+ */
+void drm_atomic_helper_async_commit(struct drm_device *dev,
+				    struct drm_atomic_state *state)
+{
+	struct drm_plane *plane;
+	struct drm_plane_state *plane_state;
+	const struct drm_plane_helper_funcs *funcs;
+	int i;
+
+	for_each_new_plane_in_state(state, plane, plane_state, i) {
+		funcs = plane->helper_private;
+		funcs->atomic_async_update(plane, plane_state);
+	}
+}
+EXPORT_SYMBOL(drm_atomic_helper_async_commit);
+
+/**
  * drm_atomic_helper_commit - commit validated state object
  * @dev: DRM device
  * @state: the driver state object
@@ -1369,6 +1393,17 @@ int drm_atomic_helper_commit(struct drm_device *dev,
 {
 	int ret;
 
+	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;
+	}
+
 	ret = drm_atomic_helper_setup_commit(state, nonblock);
 	if (ret)
 		return ret;
diff --git a/include/drm/drm_atomic.h b/include/drm/drm_atomic.h
index 0196f26..dcc8e0c 100644
--- a/include/drm/drm_atomic.h
+++ b/include/drm/drm_atomic.h
@@ -207,6 +207,7 @@ struct __drm_private_objs_state {
  * @dev: parent DRM device
  * @allow_modeset: allow full modeset
  * @legacy_cursor_update: hint to enforce legacy cursor IOCTL semantics
+ * @async_update: hint for asynchronous plane update
  * @planes: pointer to array of structures with per-plane data
  * @crtcs: pointer to array of CRTC pointers
  * @num_connector: size of the @connectors and @connector_states arrays
@@ -221,6 +222,7 @@ struct drm_atomic_state {
 	struct drm_device *dev;
 	bool allow_modeset : 1;
 	bool legacy_cursor_update : 1;
+	bool async_update : 1;
 	struct __drm_planes_state *planes;
 	struct __drm_crtcs_state *crtcs;
 	int num_connector;
diff --git a/include/drm/drm_atomic_helper.h b/include/drm/drm_atomic_helper.h
index 3bfeb2b..faa19fb 100644
--- a/include/drm/drm_atomic_helper.h
+++ b/include/drm/drm_atomic_helper.h
@@ -44,6 +44,8 @@ void drm_atomic_helper_commit_tail(struct drm_atomic_state *state);
 int drm_atomic_helper_commit(struct drm_device *dev,
 			     struct drm_atomic_state *state,
 			     bool nonblock);
+void drm_atomic_helper_async_commit(struct drm_device *dev,
+				    struct drm_atomic_state *state);
 
 int drm_atomic_helper_wait_for_fences(struct drm_device *dev,
 					struct drm_atomic_state *state,
diff --git a/include/drm/drm_modeset_helper_vtables.h b/include/drm/drm_modeset_helper_vtables.h
index 474a102..2a83112 100644
--- a/include/drm/drm_modeset_helper_vtables.h
+++ b/include/drm/drm_modeset_helper_vtables.h
@@ -1129,6 +1129,56 @@ struct drm_plane_helper_funcs {
 	 */
 	void (*atomic_disable)(struct drm_plane *plane,
 			       struct drm_plane_state *old_state);
+
+	/**
+	 * @atomic_async_check:
+	 *
+	 * Drivers should set this function pointer to check if the plane state
+	 * can be updated in a async fashion. Here async means "not vblank
+	 * synchronized".
+	 *
+	 * This hook is called by drm_atomic_async_check() to establish if a
+	 * given update can be committed asynchronously, that is, if it can
+	 * jump ahead of the state currently queued for update.
+	 *
+	 * RETURNS:
+	 *
+	 * Return 0 on success and any error returned indicates that the update
+	 * can not be applied in asynchronous manner.
+	 */
+	int (*atomic_async_check)(struct drm_plane *plane,
+				  struct drm_plane_state *state);
+
+	/**
+	 * @atomic_async_update:
+	 *
+	 * Drivers should set this function pointer to perform asynchronous
+	 * updates of planes, that is, jump ahead of the currently queued
+	 * state and update the plane. Here async means "not vblank
+	 * synchronized".
+	 *
+	 * This hook is called by drm_atomic_helper_async_commit().
+	 *
+	 * An async update will happen on legacy cursor updates. An async
+	 * update won't happen if there is an outstanding commit modifying
+	 * the same plane.
+	 *
+	 * Note that unlike &drm_plane_helper_funcs.atomic_update this hook
+	 * takes the new &drm_plane_state as parameter. When doing async_update
+	 * drivers shouldn't replace the &drm_plane_state but update the
+	 * current one with the new plane configurations in the new
+	 * plane_state.
+	 *
+	 * FIXME:
+	 *  - It only works for single plane updates
+	 *  - Async Pageflips are not supported yet
+	 *  - Some hw might still scan out the old buffer until the next
+	 *  vblank, however we let go of the fb references as soon as
+	 *  we run this hook. For now drivers must implement their own workers
+	 *  for deferring if needed, until a common solution is created.
+	 */
+	void (*atomic_async_update)(struct drm_plane *plane,
+				    struct drm_plane_state *new_state);
 };
 
 /**
-- 
2.9.4

_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel

[PATCH v3 2/6] 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.

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>
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      | 149 +++++-------------------------
 2 files changed, 97 insertions(+), 125 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_atomic_plane.c b/drivers/gpu/drm/i915/intel_atomic_plane.c
index a40c82c..1737b8a 100644
--- a/drivers/gpu/drm/i915/intel_atomic_plane.c
+++ b/drivers/gpu/drm/i915/intel_atomic_plane.c
@@ -246,11 +246,84 @@ 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(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(plane, 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 636c64e..736301d 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -13004,6 +13004,26 @@ 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;
@@ -13162,6 +13182,9 @@ intel_prepare_plane_fb(struct drm_plane *plane,
 		}
 	}
 
+	if (new_state->state->async_update)
+		return 0;
+
 	if (!obj && !old_obj)
 		return 0;
 
@@ -13389,132 +13412,8 @@ 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;
-
-	/*
-	 * 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 = IS_I830(dev_priv) ? 16 * 1024 : 256;
-
-		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;
-	old_vma = to_intel_plane_state(old_plane_state)->vma;
-
-	i915_gem_track_fb(intel_fb_obj(old_fb), intel_fb_obj(fb),
-			  intel_plane->frontbuffer_bit);
-
-	/* Swap plane state */
-	new_plane_state->fence = old_plane_state->fence;
-	*to_intel_plane_state(old_plane_state) = *to_intel_plane_state(new_plane_state);
-	new_plane_state->fence = NULL;
-	new_plane_state->fb = old_fb;
-	to_intel_plane_state(new_plane_state)->vma = old_vma;
-
-	if (plane->state->visible) {
-		trace_intel_update_plane(plane, to_intel_crtc(crtc));
-		intel_plane->update_plane(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(plane, crtc);
-	}
-
-	intel_cleanup_plane_fb(plane, new_plane_state);
-
-out_unlock:
-	mutex_unlock(&dev_priv->drm.struct_mutex);
-out_free:
-	intel_plane_destroy_state(plane, new_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,
 	.set_property = drm_atomic_helper_plane_set_property,
-- 
2.9.4

_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx

[PATCH v3 3/6] 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>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.com>
---
 drivers/gpu/drm/i915/intel_display.c | 13 +------------
 1 file changed, 1 insertion(+), 12 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 736301d..36f96271a 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -13412,17 +13412,6 @@ 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,
-	.set_property = drm_atomic_helper_plane_set_property,
-	.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)
 {
@@ -13669,7 +13658,7 @@ intel_cursor_plane_create(struct drm_i915_private *dev_priv, enum pipe pipe)
 	cursor->disable_plane = intel_disable_cursor_plane;
 
 	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),
 				       DRM_PLANE_TYPE_CURSOR,
-- 
2.9.4

_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel

[PATCH v3 4/6] 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.

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>
---
 drivers/gpu/drm/msm/mdp/mdp5/mdp5_plane.c | 151 +++++++++++++-----------------
 drivers/gpu/drm/msm/msm_atomic.c          |   6 ++
 2 files changed, 69 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 5e7d9af..bb5ee03 100644
--- a/drivers/gpu/drm/msm/mdp/mdp5/mdp5_plane.c
+++ b/drivers/gpu/drm/msm/mdp/mdp5/mdp5_plane.c
@@ -33,15 +33,6 @@ 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;
@@ -257,7 +248,7 @@ 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,
 		.set_property = drm_atomic_helper_plane_set_property,
@@ -484,11 +475,73 @@ 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,
@@ -997,84 +1050,6 @@ 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 9633a68b..0104311 100644
--- a/drivers/gpu/drm/msm/msm_atomic.c
+++ b/drivers/gpu/drm/msm/msm_atomic.c
@@ -202,6 +202,12 @@ 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;
-- 
2.9.4

_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx

[PATCH v3 5/6] 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, 3 insertions(+), 23 deletions(-)

diff --git a/drivers/gpu/drm/msm/mdp/mdp5/mdp5_plane.c b/drivers/gpu/drm/msm/mdp/mdp5/mdp5_plane.c
index bb5ee03..e6bf21d 100644
--- a/drivers/gpu/drm/msm/mdp/mdp5/mdp5_plane.c
+++ b/drivers/gpu/drm/msm/mdp/mdp5/mdp5_plane.c
@@ -247,19 +247,6 @@ 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,
-		.set_property = drm_atomic_helper_plane_set_property,
-		.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)
 {
@@ -1111,16 +1098,9 @@ struct drm_plane *mdp5_plane_init(struct drm_device *dev,
 
 	spin_lock_init(&mdp5_plane->pipe_lock);
 
-	if (type == DRM_PLANE_TYPE_CURSOR)
-		ret = drm_universal_plane_init(dev, plane, 0xff,
-				&mdp5_cursor_plane_funcs,
-				mdp5_plane->formats, mdp5_plane->nformats,
-				type, NULL);
-	else
-		ret = drm_universal_plane_init(dev, plane, 0xff,
-				&mdp5_plane_funcs,
-				mdp5_plane->formats, mdp5_plane->nformats,
-				type, NULL);
+	ret = drm_universal_plane_init(dev, plane, 0xff, &mdp5_plane_funcs,
+				       mdp5_plane->formats,
+				       mdp5_plane->nformats, type, NULL);
 	if (ret)
 		goto fail;
 
-- 
2.9.4

_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel

[PATCH v3 6/6] 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 27edae4..efd2656 100644
--- a/drivers/gpu/drm/vc4/vc4_kms.c
+++ b/drivers/gpu/drm/vc4/vc4_kms.c
@@ -95,6 +95,26 @@ 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 8853e9a..52bf74c 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,
-- 
2.9.4

_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx

✗ Fi.CI.BAT: failure for drm: add asynchrounous plane update (rev4)

[Patchwork]

== Series Details ==

Series: drm: add asynchrounous plane update (rev4)
URL   : https://patchwork.freedesktop.org/series/25814/
State : failure

== Summary ==

  CHK     include/config/kernel.release
  CHK     include/generated/uapi/linux/version.h
  CHK     include/generated/utsrelease.h
  CHK     include/generated/bounds.h
  CHK     include/generated/timeconst.h
  CHK     include/generated/asm-offsets.h
  CALL    scripts/checksyscalls.sh
  CHK     scripts/mod/devicetable-offsets.h
  CHK     include/generated/compile.h
  CHK     kernel/config_data.h
  CC [M]  drivers/gpu/drm/i915/intel_atomic_plane.o
drivers/gpu/drm/i915/intel_atomic_plane.c: In function ‘intel_plane_atomic_async_update’:
drivers/gpu/drm/i915/intel_atomic_plane.c:291:29: error: passing argument 1 of ‘intel_plane->update_plane’ from incompatible pointer type [-Werror=incompatible-pointer-types]
   intel_plane->update_plane(plane,
                             ^
drivers/gpu/drm/i915/intel_atomic_plane.c:291:29: note: expected ‘struct intel_plane *’ but argument is of type ‘struct drm_plane *’
drivers/gpu/drm/i915/intel_atomic_plane.c:296:30: error: passing argument 1 of ‘intel_plane->disable_plane’ from incompatible pointer type [-Werror=incompatible-pointer-types]
   intel_plane->disable_plane(plane, crtc);
                              ^
drivers/gpu/drm/i915/intel_atomic_plane.c:296:30: note: expected ‘struct intel_plane *’ but argument is of type ‘struct drm_plane *’
drivers/gpu/drm/i915/intel_atomic_plane.c:296:37: error: passing argument 2 of ‘intel_plane->disable_plane’ from incompatible pointer type [-Werror=incompatible-pointer-types]
   intel_plane->disable_plane(plane, crtc);
                                     ^
drivers/gpu/drm/i915/intel_atomic_plane.c:296:37: note: expected ‘struct intel_crtc *’ but argument is of type ‘struct drm_crtc *’
cc1: all warnings being treated as errors
scripts/Makefile.build:302: recipe for target 'drivers/gpu/drm/i915/intel_atomic_plane.o' failed
make[4]: *** [drivers/gpu/drm/i915/intel_atomic_plane.o] Error 1
scripts/Makefile.build:561: recipe for target 'drivers/gpu/drm/i915' failed
make[3]: *** [drivers/gpu/drm/i915] Error 2
scripts/Makefile.build:561: recipe for target 'drivers/gpu/drm' failed
make[2]: *** [drivers/gpu/drm] Error 2
scripts/Makefile.build:561: recipe for target 'drivers/gpu' failed
make[1]: *** [drivers/gpu] Error 2
Makefile:1016: recipe for target 'drivers' failed
make: *** [drivers] Error 2

_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx

Re: ✗ Fi.CI.BAT: failure for drm: add asynchrounous plane update (rev4)

[Gustavo Padovan]

This patch is meant for drm-misc, where the changes to
intel_plane->update_plane() and intel_plane->disable_plane() are not
present, so this patchset just builds fine there.

2017-06-28 Patchwork <patchwork@emeril.freedesktop.org>:

> == Series Details ==
> 
> Series: drm: add asynchrounous plane update (rev4)
> URL   : https://patchwork.freedesktop.org/series/25814/
> State : failure
> 
> == Summary ==
> 
>   CHK     include/config/kernel.release
>   CHK     include/generated/uapi/linux/version.h
>   CHK     include/generated/utsrelease.h
>   CHK     include/generated/bounds.h
>   CHK     include/generated/timeconst.h
>   CHK     include/generated/asm-offsets.h
>   CALL    scripts/checksyscalls.sh
>   CHK     scripts/mod/devicetable-offsets.h
>   CHK     include/generated/compile.h
>   CHK     kernel/config_data.h
>   CC [M]  drivers/gpu/drm/i915/intel_atomic_plane.o
> drivers/gpu/drm/i915/intel_atomic_plane.c: In function ‘intel_plane_atomic_async_update’:
> drivers/gpu/drm/i915/intel_atomic_plane.c:291:29: error: passing argument 1 of ‘intel_plane->update_plane’ from incompatible pointer type [-Werror=incompatible-pointer-types]
>    intel_plane->update_plane(plane,
>                              ^
> drivers/gpu/drm/i915/intel_atomic_plane.c:291:29: note: expected ‘struct intel_plane *’ but argument is of type ‘struct drm_plane *’
> drivers/gpu/drm/i915/intel_atomic_plane.c:296:30: error: passing argument 1 of ‘intel_plane->disable_plane’ from incompatible pointer type [-Werror=incompatible-pointer-types]
>    intel_plane->disable_plane(plane, crtc);
>                               ^
> drivers/gpu/drm/i915/intel_atomic_plane.c:296:30: note: expected ‘struct intel_plane *’ but argument is of type ‘struct drm_plane *’
> drivers/gpu/drm/i915/intel_atomic_plane.c:296:37: error: passing argument 2 of ‘intel_plane->disable_plane’ from incompatible pointer type [-Werror=incompatible-pointer-types]
>    intel_plane->disable_plane(plane, crtc);
>                                      ^
> drivers/gpu/drm/i915/intel_atomic_plane.c:296:37: note: expected ‘struct intel_crtc *’ but argument is of type ‘struct drm_crtc *’
> cc1: all warnings being treated as errors
> scripts/Makefile.build:302: recipe for target 'drivers/gpu/drm/i915/intel_atomic_plane.o' failed
> make[4]: *** [drivers/gpu/drm/i915/intel_atomic_plane.o] Error 1
> scripts/Makefile.build:561: recipe for target 'drivers/gpu/drm/i915' failed
> make[3]: *** [drivers/gpu/drm/i915] Error 2
> scripts/Makefile.build:561: recipe for target 'drivers/gpu/drm' failed
> make[2]: *** [drivers/gpu/drm] Error 2
> scripts/Makefile.build:561: recipe for target 'drivers/gpu' failed
> make[1]: *** [drivers/gpu] Error 2
> Makefile:1016: recipe for target 'drivers' failed
> make: *** [drivers] Error 2
> 
_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx

Re: ✗ Fi.CI.BAT: failure for drm: add asynchrounous plane update (rev4)

[Daniel Vetter]

On Wed, Jun 28, 2017 at 06:16:50PM -0300, Gustavo Padovan wrote:
> This patch is meant for drm-misc, where the changes to
> intel_plane->update_plane() and intel_plane->disable_plane() are not
> present, so this patchset just builds fine there.

Well for mergin we need it on top of drm-tip, which I also generally
recommend as development baseline. See also dim retip. Since when we merge
this series we cannot apply the i915 to drm-misc-next without first
merging in the other i915 changes - fixing stuff like this in an entirely
untested merge commit is really bad engineering :-)

Can you pls rebase so our CI can consume it?

Thanks, Daniel

> 
> 2017-06-28 Patchwork <patchwork@emeril.freedesktop.org>:
> 
> > == Series Details ==
> > 
> > Series: drm: add asynchrounous plane update (rev4)
> > URL   : https://patchwork.freedesktop.org/series/25814/
> > State : failure
> > 
> > == Summary ==
> > 
> >   CHK     include/config/kernel.release
> >   CHK     include/generated/uapi/linux/version.h
> >   CHK     include/generated/utsrelease.h
> >   CHK     include/generated/bounds.h
> >   CHK     include/generated/timeconst.h
> >   CHK     include/generated/asm-offsets.h
> >   CALL    scripts/checksyscalls.sh
> >   CHK     scripts/mod/devicetable-offsets.h
> >   CHK     include/generated/compile.h
> >   CHK     kernel/config_data.h
> >   CC [M]  drivers/gpu/drm/i915/intel_atomic_plane.o
> > drivers/gpu/drm/i915/intel_atomic_plane.c: In function ‘intel_plane_atomic_async_update’:
> > drivers/gpu/drm/i915/intel_atomic_plane.c:291:29: error: passing argument 1 of ‘intel_plane->update_plane’ from incompatible pointer type [-Werror=incompatible-pointer-types]
> >    intel_plane->update_plane(plane,
> >                              ^
> > drivers/gpu/drm/i915/intel_atomic_plane.c:291:29: note: expected ‘struct intel_plane *’ but argument is of type ‘struct drm_plane *’
> > drivers/gpu/drm/i915/intel_atomic_plane.c:296:30: error: passing argument 1 of ‘intel_plane->disable_plane’ from incompatible pointer type [-Werror=incompatible-pointer-types]
> >    intel_plane->disable_plane(plane, crtc);
> >                               ^
> > drivers/gpu/drm/i915/intel_atomic_plane.c:296:30: note: expected ‘struct intel_plane *’ but argument is of type ‘struct drm_plane *’
> > drivers/gpu/drm/i915/intel_atomic_plane.c:296:37: error: passing argument 2 of ‘intel_plane->disable_plane’ from incompatible pointer type [-Werror=incompatible-pointer-types]
> >    intel_plane->disable_plane(plane, crtc);
> >                                      ^
> > drivers/gpu/drm/i915/intel_atomic_plane.c:296:37: note: expected ‘struct intel_crtc *’ but argument is of type ‘struct drm_crtc *’
> > cc1: all warnings being treated as errors
> > scripts/Makefile.build:302: recipe for target 'drivers/gpu/drm/i915/intel_atomic_plane.o' failed
> > make[4]: *** [drivers/gpu/drm/i915/intel_atomic_plane.o] Error 1
> > scripts/Makefile.build:561: recipe for target 'drivers/gpu/drm/i915' failed
> > make[3]: *** [drivers/gpu/drm/i915] Error 2
> > scripts/Makefile.build:561: recipe for target 'drivers/gpu/drm' failed
> > make[2]: *** [drivers/gpu/drm] Error 2
> > scripts/Makefile.build:561: recipe for target 'drivers/gpu' failed
> > make[1]: *** [drivers/gpu] Error 2
> > Makefile:1016: recipe for target 'drivers' failed
> > make: *** [drivers] Error 2
> > 
> _______________________________________________
> Intel-gfx mailing list
> Intel-gfx@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/intel-gfx

-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx

Re: [PATCH v3 2/6] drm/i915: update cursors asynchronously through atomic

[Daniel Vetter]

On Wed, Jun 28, 2017 at 05:54:56PM -0300, Gustavo Padovan wrote:
> 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.
> 
> 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>
> 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      | 149 +++++-------------------------
>  2 files changed, 97 insertions(+), 125 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/intel_atomic_plane.c b/drivers/gpu/drm/i915/intel_atomic_plane.c
> index a40c82c..1737b8a 100644
> --- a/drivers/gpu/drm/i915/intel_atomic_plane.c
> +++ b/drivers/gpu/drm/i915/intel_atomic_plane.c
> @@ -246,11 +246,84 @@ 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;

If we ever expose async updates as an ATOMIC_IOCTL flag then we need to
improve this check a lot, and make it more robust. Otherwise we'll get
things wrong everytime we add a new property (like rotation).
-Daniel

> +
> +	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(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(plane, 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 636c64e..736301d 100644
> --- a/drivers/gpu/drm/i915/intel_display.c
> +++ b/drivers/gpu/drm/i915/intel_display.c
> @@ -13004,6 +13004,26 @@ 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;
> @@ -13162,6 +13182,9 @@ intel_prepare_plane_fb(struct drm_plane *plane,
>  		}
>  	}
>  
> +	if (new_state->state->async_update)
> +		return 0;
> +
>  	if (!obj && !old_obj)
>  		return 0;
>  
> @@ -13389,132 +13412,8 @@ 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;
> -
> -	/*
> -	 * 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 = IS_I830(dev_priv) ? 16 * 1024 : 256;
> -
> -		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;
> -	old_vma = to_intel_plane_state(old_plane_state)->vma;
> -
> -	i915_gem_track_fb(intel_fb_obj(old_fb), intel_fb_obj(fb),
> -			  intel_plane->frontbuffer_bit);
> -
> -	/* Swap plane state */
> -	new_plane_state->fence = old_plane_state->fence;
> -	*to_intel_plane_state(old_plane_state) = *to_intel_plane_state(new_plane_state);
> -	new_plane_state->fence = NULL;
> -	new_plane_state->fb = old_fb;
> -	to_intel_plane_state(new_plane_state)->vma = old_vma;
> -
> -	if (plane->state->visible) {
> -		trace_intel_update_plane(plane, to_intel_crtc(crtc));
> -		intel_plane->update_plane(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(plane, crtc);
> -	}
> -
> -	intel_cleanup_plane_fb(plane, new_plane_state);
> -
> -out_unlock:
> -	mutex_unlock(&dev_priv->drm.struct_mutex);
> -out_free:
> -	intel_plane_destroy_state(plane, new_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,
>  	.set_property = drm_atomic_helper_plane_set_property,
> -- 
> 2.9.4
> 
> _______________________________________________
> dri-devel mailing list
> dri-devel@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/dri-devel

-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel

Re: [PATCH v3 1/6] drm/atomic: initial support for asynchronous plane update

[Daniel Vetter]

On Wed, Jun 28, 2017 at 05:54:55PM -0300, Gustavo Padovan wrote:
> From: Gustavo Padovan <gustavo.padovan@collabora.com>
> 
> In some cases, like cursor updates, it is interesting to update the
> plane in an asynchronous fashion to avoid big delays. The current queued
> update could be still waiting for a fence to signal and thus block any
> subsequent update until its scan out. In cases like this if we update the
> cursor synchronously through the atomic API it will cause significant
> delays that would even be noticed by the final user.
> 
> This patch creates a fast path to jump ahead the current queued state and
> do single planes updates without going through all atomic steps in
> drm_atomic_helper_commit(). We take this path for legacy cursor updates.
> 
> For now only single plane updates are supported, but we plan to support
> multiple planes updates and async PageFlips through this interface as well
> in the near future.
> 
> v5:
> 	- improve comments (Eric Anholt)
> 
> v4:
> 	- fix state->crtc NULL check (Archit Taneja)
> 
> v3:
> 	- fix iteration on the wrong crtc state
> 	- put back code to forbid updates if there is a queued update for
> 	the same plane (Ville Syrjälä)
> 	- move size checks back to drivers (Ville Syrjälä)
> 	- move ASYNC_UPDATE flag addition to its own patch (Ville Syrjälä)
> 
> v2:
> 	- allow updates even if there is a queued update for the same
> 	plane.
>         - fixes on the documentation (Emil Velikov)
>         - unconditionally call ->atomic_async_update (Emil Velikov)
>         - check for ->atomic_async_update earlier (Daniel Vetter)
>         - make ->atomic_async_check() the last step (Daniel Vetter)
>         - add ASYNC_UPDATE flag (Eric Anholt)
>         - update state in core after ->atomic_async_update (Eric Anholt)
> 	- update docs (Eric Anholt)
> 
> Cc: Daniel Vetter <daniel.vetter@intel.com>
> Cc: Rob Clark <robdclark@gmail.com>
> Cc: Eric Anholt <eric@anholt.net>
> Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.com>
> Reviewed-by: Archit Taneja <architt@codeaurora.org>
> Acked-by: Eric Anholt <eric@anholt.net>

Ok I wanted to merge this, but found one more nit. The new
->atomic_async_commit/check hooks are imo driver interface functions (you
call the from the core drm_atomic.c), but you put the hooks into the
helper vtables. Can you pls move them into drm_plane_funcs instead?

The only reason this worked is because I accidentally left a
drm_plane_helper.h include in drm_atomic.c which shouldn't be there ...

Otherwise looks all good, and with that fix has my

Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>

Thanks, Daniel

> ---
>  drivers/gpu/drm/drm_atomic.c             | 70 ++++++++++++++++++++++++++++++++
>  drivers/gpu/drm/drm_atomic_helper.c      | 35 ++++++++++++++++
>  include/drm/drm_atomic.h                 |  2 +
>  include/drm/drm_atomic_helper.h          |  2 +
>  include/drm/drm_modeset_helper_vtables.h | 50 +++++++++++++++++++++++
>  5 files changed, 159 insertions(+)
> 
> diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c
> index c0f336d..e406688 100644
> --- a/drivers/gpu/drm/drm_atomic.c
> +++ b/drivers/gpu/drm/drm_atomic.c
> @@ -644,6 +644,73 @@ static int drm_atomic_crtc_check(struct drm_crtc *crtc,
>  	return 0;
>  }
>  
> +static bool drm_atomic_async_check(struct drm_atomic_state *state)
> +{
> +	struct drm_crtc *crtc;
> +	struct drm_crtc_state *crtc_state;
> +	struct drm_crtc_commit *commit;
> +	struct drm_plane *__plane, *plane = NULL;
> +	struct drm_plane_state *__plane_state, *plane_state = NULL;
> +	const struct drm_plane_helper_funcs *funcs;
> +	int i, j, n_planes = 0;
> +
> +	for_each_new_crtc_in_state(state, crtc, crtc_state, i) {
> +		if (drm_atomic_crtc_needs_modeset(crtc_state))
> +			return false;
> +	}
> +
> +	for_each_new_plane_in_state(state, __plane, __plane_state, i) {
> +		n_planes++;
> +		plane = __plane;
> +		plane_state = __plane_state;
> +	}
> +
> +	/* FIXME: we support only single plane updates for now */
> +	if (!plane || n_planes != 1)
> +		return false;
> +
> +	if (!plane_state->crtc)
> +		return false;
> +
> +	funcs = plane->helper_private;
> +	if (!funcs->atomic_async_update)
> +		return false;
> +
> +	if (plane_state->fence)
> +		return false;
> +
> +	/*
> +	 * 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.
> +	 */
> +	for_each_new_crtc_in_state(state, crtc, crtc_state, i) {
> +		if (plane->crtc != crtc)
> +			continue;
> +
> +		spin_lock(&crtc->commit_lock);
> +		commit = list_first_entry_or_null(&crtc->commit_list,
> +						  struct drm_crtc_commit,
> +						  commit_entry);
> +		if (!commit) {
> +			spin_unlock(&crtc->commit_lock);
> +			continue;
> +		}
> +		spin_unlock(&crtc->commit_lock);
> +
> +		if (!crtc->state->state)
> +			continue;
> +
> +		for_each_plane_in_state(crtc->state->state, __plane,
> +					__plane_state, j) {
> +			if (__plane == plane)
> +				return false;
> +		}
> +	}
> +
> +	return !funcs->atomic_async_check(plane, plane_state);
> +}
> +
>  static void drm_atomic_crtc_print_state(struct drm_printer *p,
>  		const struct drm_crtc_state *state)
>  {
> @@ -1665,6 +1732,9 @@ int drm_atomic_check_only(struct drm_atomic_state *state)
>  		}
>  	}
>  
> +	if (state->legacy_cursor_update)
> +		state->async_update = drm_atomic_async_check(state);
> +
>  	return ret;
>  }
>  EXPORT_SYMBOL(drm_atomic_check_only);
> diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c
> index c4e4e8b..8c4ee8b 100644
> --- a/drivers/gpu/drm/drm_atomic_helper.c
> +++ b/drivers/gpu/drm/drm_atomic_helper.c
> @@ -1346,6 +1346,30 @@ static void commit_work(struct work_struct *work)
>  }
>  
>  /**
> + * drm_atomic_helper_async_commit - commit state asynchronously
> + *
> + * This function commits a state asynchronously, i.e., not vblank
> + * synchronized. It should be used on a state only when
> + * drm_atomic_async_check() succeeds. Async commits are not supposed to swap
> + * the states like normal sync commits, but just do in-place changes on the
> + * current state.
> + */
> +void drm_atomic_helper_async_commit(struct drm_device *dev,
> +				    struct drm_atomic_state *state)
> +{
> +	struct drm_plane *plane;
> +	struct drm_plane_state *plane_state;
> +	const struct drm_plane_helper_funcs *funcs;
> +	int i;
> +
> +	for_each_new_plane_in_state(state, plane, plane_state, i) {
> +		funcs = plane->helper_private;
> +		funcs->atomic_async_update(plane, plane_state);
> +	}
> +}
> +EXPORT_SYMBOL(drm_atomic_helper_async_commit);
> +
> +/**
>   * drm_atomic_helper_commit - commit validated state object
>   * @dev: DRM device
>   * @state: the driver state object
> @@ -1369,6 +1393,17 @@ int drm_atomic_helper_commit(struct drm_device *dev,
>  {
>  	int ret;
>  
> +	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;
> +	}
> +
>  	ret = drm_atomic_helper_setup_commit(state, nonblock);
>  	if (ret)
>  		return ret;
> diff --git a/include/drm/drm_atomic.h b/include/drm/drm_atomic.h
> index 0196f26..dcc8e0c 100644
> --- a/include/drm/drm_atomic.h
> +++ b/include/drm/drm_atomic.h
> @@ -207,6 +207,7 @@ struct __drm_private_objs_state {
>   * @dev: parent DRM device
>   * @allow_modeset: allow full modeset
>   * @legacy_cursor_update: hint to enforce legacy cursor IOCTL semantics
> + * @async_update: hint for asynchronous plane update
>   * @planes: pointer to array of structures with per-plane data
>   * @crtcs: pointer to array of CRTC pointers
>   * @num_connector: size of the @connectors and @connector_states arrays
> @@ -221,6 +222,7 @@ struct drm_atomic_state {
>  	struct drm_device *dev;
>  	bool allow_modeset : 1;
>  	bool legacy_cursor_update : 1;
> +	bool async_update : 1;
>  	struct __drm_planes_state *planes;
>  	struct __drm_crtcs_state *crtcs;
>  	int num_connector;
> diff --git a/include/drm/drm_atomic_helper.h b/include/drm/drm_atomic_helper.h
> index 3bfeb2b..faa19fb 100644
> --- a/include/drm/drm_atomic_helper.h
> +++ b/include/drm/drm_atomic_helper.h
> @@ -44,6 +44,8 @@ void drm_atomic_helper_commit_tail(struct drm_atomic_state *state);
>  int drm_atomic_helper_commit(struct drm_device *dev,
>  			     struct drm_atomic_state *state,
>  			     bool nonblock);
> +void drm_atomic_helper_async_commit(struct drm_device *dev,
> +				    struct drm_atomic_state *state);
>  
>  int drm_atomic_helper_wait_for_fences(struct drm_device *dev,
>  					struct drm_atomic_state *state,
> diff --git a/include/drm/drm_modeset_helper_vtables.h b/include/drm/drm_modeset_helper_vtables.h
> index 474a102..2a83112 100644
> --- a/include/drm/drm_modeset_helper_vtables.h
> +++ b/include/drm/drm_modeset_helper_vtables.h
> @@ -1129,6 +1129,56 @@ struct drm_plane_helper_funcs {
>  	 */
>  	void (*atomic_disable)(struct drm_plane *plane,
>  			       struct drm_plane_state *old_state);
> +
> +	/**
> +	 * @atomic_async_check:
> +	 *
> +	 * Drivers should set this function pointer to check if the plane state
> +	 * can be updated in a async fashion. Here async means "not vblank
> +	 * synchronized".
> +	 *
> +	 * This hook is called by drm_atomic_async_check() to establish if a
> +	 * given update can be committed asynchronously, that is, if it can
> +	 * jump ahead of the state currently queued for update.
> +	 *
> +	 * RETURNS:
> +	 *
> +	 * Return 0 on success and any error returned indicates that the update
> +	 * can not be applied in asynchronous manner.
> +	 */
> +	int (*atomic_async_check)(struct drm_plane *plane,
> +				  struct drm_plane_state *state);
> +
> +	/**
> +	 * @atomic_async_update:
> +	 *
> +	 * Drivers should set this function pointer to perform asynchronous
> +	 * updates of planes, that is, jump ahead of the currently queued
> +	 * state and update the plane. Here async means "not vblank
> +	 * synchronized".
> +	 *
> +	 * This hook is called by drm_atomic_helper_async_commit().
> +	 *
> +	 * An async update will happen on legacy cursor updates. An async
> +	 * update won't happen if there is an outstanding commit modifying
> +	 * the same plane.
> +	 *
> +	 * Note that unlike &drm_plane_helper_funcs.atomic_update this hook
> +	 * takes the new &drm_plane_state as parameter. When doing async_update
> +	 * drivers shouldn't replace the &drm_plane_state but update the
> +	 * current one with the new plane configurations in the new
> +	 * plane_state.
> +	 *
> +	 * FIXME:
> +	 *  - It only works for single plane updates
> +	 *  - Async Pageflips are not supported yet
> +	 *  - Some hw might still scan out the old buffer until the next
> +	 *  vblank, however we let go of the fb references as soon as
> +	 *  we run this hook. For now drivers must implement their own workers
> +	 *  for deferring if needed, until a common solution is created.
> +	 */
> +	void (*atomic_async_update)(struct drm_plane *plane,
> +				    struct drm_plane_state *new_state);
>  };
>  
>  /**
> -- 
> 2.9.4
> 
> _______________________________________________
> dri-devel mailing list
> dri-devel@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/dri-devel

-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx

Re: [PATCH v3 1/6] drm/atomic: initial support for asynchronous plane update

[Daniel Vetter]

On Fri, Jun 30, 2017 at 09:30:50AM +0200, Daniel Vetter wrote:
> On Wed, Jun 28, 2017 at 05:54:55PM -0300, Gustavo Padovan wrote:
> > From: Gustavo Padovan <gustavo.padovan@collabora.com>
> > 
> > In some cases, like cursor updates, it is interesting to update the
> > plane in an asynchronous fashion to avoid big delays. The current queued
> > update could be still waiting for a fence to signal and thus block any
> > subsequent update until its scan out. In cases like this if we update the
> > cursor synchronously through the atomic API it will cause significant
> > delays that would even be noticed by the final user.
> > 
> > This patch creates a fast path to jump ahead the current queued state and
> > do single planes updates without going through all atomic steps in
> > drm_atomic_helper_commit(). We take this path for legacy cursor updates.
> > 
> > For now only single plane updates are supported, but we plan to support
> > multiple planes updates and async PageFlips through this interface as well
> > in the near future.
> > 
> > v5:
> > 	- improve comments (Eric Anholt)
> > 
> > v4:
> > 	- fix state->crtc NULL check (Archit Taneja)
> > 
> > v3:
> > 	- fix iteration on the wrong crtc state
> > 	- put back code to forbid updates if there is a queued update for
> > 	the same plane (Ville Syrjälä)
> > 	- move size checks back to drivers (Ville Syrjälä)
> > 	- move ASYNC_UPDATE flag addition to its own patch (Ville Syrjälä)
> > 
> > v2:
> > 	- allow updates even if there is a queued update for the same
> > 	plane.
> >         - fixes on the documentation (Emil Velikov)
> >         - unconditionally call ->atomic_async_update (Emil Velikov)
> >         - check for ->atomic_async_update earlier (Daniel Vetter)
> >         - make ->atomic_async_check() the last step (Daniel Vetter)
> >         - add ASYNC_UPDATE flag (Eric Anholt)
> >         - update state in core after ->atomic_async_update (Eric Anholt)
> > 	- update docs (Eric Anholt)
> > 
> > Cc: Daniel Vetter <daniel.vetter@intel.com>
> > Cc: Rob Clark <robdclark@gmail.com>
> > Cc: Eric Anholt <eric@anholt.net>
> > Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.com>
> > Reviewed-by: Archit Taneja <architt@codeaurora.org>
> > Acked-by: Eric Anholt <eric@anholt.net>
> 
> Ok I wanted to merge this, but found one more nit. The new
> ->atomic_async_commit/check hooks are imo driver interface functions (you
> call the from the core drm_atomic.c), but you put the hooks into the
> helper vtables. Can you pls move them into drm_plane_funcs instead?
> 
> The only reason this worked is because I accidentally left a
> drm_plane_helper.h include in drm_atomic.c which shouldn't be there ...

Otoh this does all feel supremely like helper code, so maybe the better
option would be to move all the code you're adding here into
drm_atomic_helper.c, (with function prefixes changed). You already call
async_commit from the helper's atomic_commit, and doing the same for the
check side would make things more symmetric.

I think that way round would be even cleaner separation between core code
and helpers.
-Daniel

> 
> Otherwise looks all good, and with that fix has my
> 
> Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
> 
> Thanks, Daniel
> 
> > ---
> >  drivers/gpu/drm/drm_atomic.c             | 70 ++++++++++++++++++++++++++++++++
> >  drivers/gpu/drm/drm_atomic_helper.c      | 35 ++++++++++++++++
> >  include/drm/drm_atomic.h                 |  2 +
> >  include/drm/drm_atomic_helper.h          |  2 +
> >  include/drm/drm_modeset_helper_vtables.h | 50 +++++++++++++++++++++++
> >  5 files changed, 159 insertions(+)
> > 
> > diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c
> > index c0f336d..e406688 100644
> > --- a/drivers/gpu/drm/drm_atomic.c
> > +++ b/drivers/gpu/drm/drm_atomic.c
> > @@ -644,6 +644,73 @@ static int drm_atomic_crtc_check(struct drm_crtc *crtc,
> >  	return 0;
> >  }
> >  
> > +static bool drm_atomic_async_check(struct drm_atomic_state *state)
> > +{
> > +	struct drm_crtc *crtc;
> > +	struct drm_crtc_state *crtc_state;
> > +	struct drm_crtc_commit *commit;
> > +	struct drm_plane *__plane, *plane = NULL;
> > +	struct drm_plane_state *__plane_state, *plane_state = NULL;
> > +	const struct drm_plane_helper_funcs *funcs;
> > +	int i, j, n_planes = 0;
> > +
> > +	for_each_new_crtc_in_state(state, crtc, crtc_state, i) {
> > +		if (drm_atomic_crtc_needs_modeset(crtc_state))
> > +			return false;
> > +	}
> > +
> > +	for_each_new_plane_in_state(state, __plane, __plane_state, i) {
> > +		n_planes++;
> > +		plane = __plane;
> > +		plane_state = __plane_state;
> > +	}
> > +
> > +	/* FIXME: we support only single plane updates for now */
> > +	if (!plane || n_planes != 1)
> > +		return false;
> > +
> > +	if (!plane_state->crtc)
> > +		return false;
> > +
> > +	funcs = plane->helper_private;
> > +	if (!funcs->atomic_async_update)
> > +		return false;
> > +
> > +	if (plane_state->fence)
> > +		return false;
> > +
> > +	/*
> > +	 * 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.
> > +	 */
> > +	for_each_new_crtc_in_state(state, crtc, crtc_state, i) {
> > +		if (plane->crtc != crtc)
> > +			continue;
> > +
> > +		spin_lock(&crtc->commit_lock);
> > +		commit = list_first_entry_or_null(&crtc->commit_list,
> > +						  struct drm_crtc_commit,
> > +						  commit_entry);
> > +		if (!commit) {
> > +			spin_unlock(&crtc->commit_lock);
> > +			continue;
> > +		}
> > +		spin_unlock(&crtc->commit_lock);
> > +
> > +		if (!crtc->state->state)
> > +			continue;
> > +
> > +		for_each_plane_in_state(crtc->state->state, __plane,
> > +					__plane_state, j) {
> > +			if (__plane == plane)
> > +				return false;
> > +		}
> > +	}
> > +
> > +	return !funcs->atomic_async_check(plane, plane_state);
> > +}
> > +
> >  static void drm_atomic_crtc_print_state(struct drm_printer *p,
> >  		const struct drm_crtc_state *state)
> >  {
> > @@ -1665,6 +1732,9 @@ int drm_atomic_check_only(struct drm_atomic_state *state)
> >  		}
> >  	}
> >  
> > +	if (state->legacy_cursor_update)
> > +		state->async_update = drm_atomic_async_check(state);
> > +
> >  	return ret;
> >  }
> >  EXPORT_SYMBOL(drm_atomic_check_only);
> > diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c
> > index c4e4e8b..8c4ee8b 100644
> > --- a/drivers/gpu/drm/drm_atomic_helper.c
> > +++ b/drivers/gpu/drm/drm_atomic_helper.c
> > @@ -1346,6 +1346,30 @@ static void commit_work(struct work_struct *work)
> >  }
> >  
> >  /**
> > + * drm_atomic_helper_async_commit - commit state asynchronously
> > + *
> > + * This function commits a state asynchronously, i.e., not vblank
> > + * synchronized. It should be used on a state only when
> > + * drm_atomic_async_check() succeeds. Async commits are not supposed to swap
> > + * the states like normal sync commits, but just do in-place changes on the
> > + * current state.
> > + */
> > +void drm_atomic_helper_async_commit(struct drm_device *dev,
> > +				    struct drm_atomic_state *state)
> > +{
> > +	struct drm_plane *plane;
> > +	struct drm_plane_state *plane_state;
> > +	const struct drm_plane_helper_funcs *funcs;
> > +	int i;
> > +
> > +	for_each_new_plane_in_state(state, plane, plane_state, i) {
> > +		funcs = plane->helper_private;
> > +		funcs->atomic_async_update(plane, plane_state);
> > +	}
> > +}
> > +EXPORT_SYMBOL(drm_atomic_helper_async_commit);
> > +
> > +/**
> >   * drm_atomic_helper_commit - commit validated state object
> >   * @dev: DRM device
> >   * @state: the driver state object
> > @@ -1369,6 +1393,17 @@ int drm_atomic_helper_commit(struct drm_device *dev,
> >  {
> >  	int ret;
> >  
> > +	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;
> > +	}
> > +
> >  	ret = drm_atomic_helper_setup_commit(state, nonblock);
> >  	if (ret)
> >  		return ret;
> > diff --git a/include/drm/drm_atomic.h b/include/drm/drm_atomic.h
> > index 0196f26..dcc8e0c 100644
> > --- a/include/drm/drm_atomic.h
> > +++ b/include/drm/drm_atomic.h
> > @@ -207,6 +207,7 @@ struct __drm_private_objs_state {
> >   * @dev: parent DRM device
> >   * @allow_modeset: allow full modeset
> >   * @legacy_cursor_update: hint to enforce legacy cursor IOCTL semantics
> > + * @async_update: hint for asynchronous plane update
> >   * @planes: pointer to array of structures with per-plane data
> >   * @crtcs: pointer to array of CRTC pointers
> >   * @num_connector: size of the @connectors and @connector_states arrays
> > @@ -221,6 +222,7 @@ struct drm_atomic_state {
> >  	struct drm_device *dev;
> >  	bool allow_modeset : 1;
> >  	bool legacy_cursor_update : 1;
> > +	bool async_update : 1;
> >  	struct __drm_planes_state *planes;
> >  	struct __drm_crtcs_state *crtcs;
> >  	int num_connector;
> > diff --git a/include/drm/drm_atomic_helper.h b/include/drm/drm_atomic_helper.h
> > index 3bfeb2b..faa19fb 100644
> > --- a/include/drm/drm_atomic_helper.h
> > +++ b/include/drm/drm_atomic_helper.h
> > @@ -44,6 +44,8 @@ void drm_atomic_helper_commit_tail(struct drm_atomic_state *state);
> >  int drm_atomic_helper_commit(struct drm_device *dev,
> >  			     struct drm_atomic_state *state,
> >  			     bool nonblock);
> > +void drm_atomic_helper_async_commit(struct drm_device *dev,
> > +				    struct drm_atomic_state *state);
> >  
> >  int drm_atomic_helper_wait_for_fences(struct drm_device *dev,
> >  					struct drm_atomic_state *state,
> > diff --git a/include/drm/drm_modeset_helper_vtables.h b/include/drm/drm_modeset_helper_vtables.h
> > index 474a102..2a83112 100644
> > --- a/include/drm/drm_modeset_helper_vtables.h
> > +++ b/include/drm/drm_modeset_helper_vtables.h
> > @@ -1129,6 +1129,56 @@ struct drm_plane_helper_funcs {
> >  	 */
> >  	void (*atomic_disable)(struct drm_plane *plane,
> >  			       struct drm_plane_state *old_state);
> > +
> > +	/**
> > +	 * @atomic_async_check:
> > +	 *
> > +	 * Drivers should set this function pointer to check if the plane state
> > +	 * can be updated in a async fashion. Here async means "not vblank
> > +	 * synchronized".
> > +	 *
> > +	 * This hook is called by drm_atomic_async_check() to establish if a
> > +	 * given update can be committed asynchronously, that is, if it can
> > +	 * jump ahead of the state currently queued for update.
> > +	 *
> > +	 * RETURNS:
> > +	 *
> > +	 * Return 0 on success and any error returned indicates that the update
> > +	 * can not be applied in asynchronous manner.
> > +	 */
> > +	int (*atomic_async_check)(struct drm_plane *plane,
> > +				  struct drm_plane_state *state);
> > +
> > +	/**
> > +	 * @atomic_async_update:
> > +	 *
> > +	 * Drivers should set this function pointer to perform asynchronous
> > +	 * updates of planes, that is, jump ahead of the currently queued
> > +	 * state and update the plane. Here async means "not vblank
> > +	 * synchronized".
> > +	 *
> > +	 * This hook is called by drm_atomic_helper_async_commit().
> > +	 *
> > +	 * An async update will happen on legacy cursor updates. An async
> > +	 * update won't happen if there is an outstanding commit modifying
> > +	 * the same plane.
> > +	 *
> > +	 * Note that unlike &drm_plane_helper_funcs.atomic_update this hook
> > +	 * takes the new &drm_plane_state as parameter. When doing async_update
> > +	 * drivers shouldn't replace the &drm_plane_state but update the
> > +	 * current one with the new plane configurations in the new
> > +	 * plane_state.
> > +	 *
> > +	 * FIXME:
> > +	 *  - It only works for single plane updates
> > +	 *  - Async Pageflips are not supported yet
> > +	 *  - Some hw might still scan out the old buffer until the next
> > +	 *  vblank, however we let go of the fb references as soon as
> > +	 *  we run this hook. For now drivers must implement their own workers
> > +	 *  for deferring if needed, until a common solution is created.
> > +	 */
> > +	void (*atomic_async_update)(struct drm_plane *plane,
> > +				    struct drm_plane_state *new_state);
> >  };
> >  
> >  /**
> > -- 
> > 2.9.4
> > 
> > _______________________________________________
> > dri-devel mailing list
> > dri-devel@lists.freedesktop.org
> > https://lists.freedesktop.org/mailman/listinfo/dri-devel
> 
> -- 
> Daniel Vetter
> Software Engineer, Intel Corporation
> http://blog.ffwll.ch

-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel