1 files changed, 59 insertions, 4 deletions

diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c
index d579fd8f7cb8..2c2c9caf0be5 100644
--- a/drivers/gpu/drm/drm_atomic_helper.c
+++ b/drivers/gpu/drm/drm_atomic_helper.c
@@ -1511,6 +1511,47 @@ void drm_atomic_helper_commit_modeset_enables(struct drm_device *dev,
 }
 EXPORT_SYMBOL(drm_atomic_helper_commit_modeset_enables);
 
+/*
+ * For atomic updates which touch just a single CRTC, calculate the time of the
+ * next vblank, and inform all the fences of the deadline.
+ */
+static void set_fence_deadline(struct drm_device *dev,
+			       struct drm_atomic_state *state)
+{
+	struct drm_crtc *crtc;
+	struct drm_crtc_state *new_crtc_state;
+	struct drm_plane *plane;
+	struct drm_plane_state *new_plane_state;
+	ktime_t vbltime = 0;
+	int i;
+
+	for_each_new_crtc_in_state (state, crtc, new_crtc_state, i) {
+		ktime_t v;
+
+		if (drm_atomic_crtc_needs_modeset(new_crtc_state))
+			continue;
+
+		if (!new_crtc_state->active)
+			continue;
+
+		if (drm_crtc_next_vblank_start(crtc, &v))
+			continue;
+
+		if (!vbltime || ktime_before(v, vbltime))
+			vbltime = v;
+	}
+
+	/* If no CRTCs updated, then nothing to do: */
+	if (!vbltime)
+		return;
+
+	for_each_new_plane_in_state (state, plane, new_plane_state, i) {
+		if (!new_plane_state->fence)
+			continue;
+		dma_fence_set_deadline(new_plane_state->fence, vbltime);
+	}
+}
+
 /**
  * drm_atomic_helper_wait_for_fences - wait for fences stashed in plane state
  * @dev: DRM device
@@ -1540,6 +1581,8 @@ int drm_atomic_helper_wait_for_fences(struct drm_device *dev,
 	struct drm_plane_state *new_plane_state;
 	int i, ret;
 
+	set_fence_deadline(dev, state);
+
 	for_each_new_plane_in_state(state, plane, new_plane_state, i) {
 		if (!new_plane_state->fence)
 			continue;
@@ -2702,6 +2745,11 @@ void drm_atomic_helper_commit_planes(struct drm_device *dev,
 			funcs->atomic_disable(plane, old_state);
 		} else if (new_plane_state->crtc || disabling) {
 			funcs->atomic_update(plane, old_state);
+
+			if (!disabling && funcs->atomic_enable) {
+				if (drm_atomic_plane_enabling(old_plane_state, new_plane_state))
+					funcs->atomic_enable(plane, old_state);
+			}
 		}
 	}
 
@@ -2762,6 +2810,7 @@ drm_atomic_helper_commit_planes_on_crtc(struct drm_crtc_state *old_crtc_state)
 		struct drm_plane_state *new_plane_state =
 			drm_atomic_get_new_plane_state(old_state, plane);
 		const struct drm_plane_helper_funcs *plane_funcs;
+		bool disabling;
 
 		plane_funcs = plane->helper_private;
 
@@ -2771,12 +2820,18 @@ drm_atomic_helper_commit_planes_on_crtc(struct drm_crtc_state *old_crtc_state)
 		WARN_ON(new_plane_state->crtc &&
 			new_plane_state->crtc != crtc);
 
-		if (drm_atomic_plane_disabling(old_plane_state, new_plane_state) &&
-		    plane_funcs->atomic_disable)
+		disabling = drm_atomic_plane_disabling(old_plane_state, new_plane_state);
+
+		if (disabling && plane_funcs->atomic_disable) {
 			plane_funcs->atomic_disable(plane, old_state);
-		else if (new_plane_state->crtc ||
-			 drm_atomic_plane_disabling(old_plane_state, new_plane_state))
+		} else if (new_plane_state->crtc || disabling) {
 			plane_funcs->atomic_update(plane, old_state);
+
+			if (!disabling && plane_funcs->atomic_enable) {
+				if (drm_atomic_plane_enabling(old_plane_state, new_plane_state))
+					plane_funcs->atomic_enable(plane, old_state);
+			}
+		}
 	}
 
 	if (crtc_funcs && crtc_funcs->atomic_flush)