Merge tag 'topic/core-stuff-2014-11-28' of git://anongit.freedesktop.org/drm-intel into drm-next

So here's a pile of atomic fixes and improvements from various people.
There's still more patches in-flight, so I think I'll keep collecting them
in a separate branch.

* tag 'topic/core-stuff-2014-11-28' of git://anongit.freedesktop.org/drm-intel:
  drm/atomic: clear plane's CRTC and FB when shutting down
  drm: Handle atomic state properly in kms getfoo ioctl
  drm: use mode_object_find helpers
  drm: fix indentation
  drm/msm: switch to atomic-helpers iterator macros
  drm/atomic: add plane iterator macros
  drm/atomic: track bitmask of planes attached to crtc
  drm: Free atomic state during cleanup
  drm: Make drm_atomic.h standalone includible
  drm: Make drm_atomic_helper.h standalone includible
  drm/plane: Add missing kerneldoc
  drm/plane: Pass old state to ->atomic_update()
  drm/atomic_helper: Cope with plane->crtc == NULL in disable helper
  drm/atomic: Drop per-plane locking TODO
  drm/atomic-helper: Skip vblank waits for unchanged fbs
  drm: Document that drm_dev_alloc doesn't need a parent

1 files changed, 21 insertions, 11 deletions

diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c
index d3b46746b611..ff5f034cc405 100644
--- a/drivers/gpu/drm/drm_atomic.c
+++ b/drivers/gpu/drm/drm_atomic.c
@@ -243,12 +243,6 @@ drm_atomic_get_plane_state(struct drm_atomic_state *state,
 	if (state->plane_states[index])
 		return state->plane_states[index];
 
-	/*
-	 * TODO: We currently don't have per-plane mutexes. So instead of trying
-	 * crazy tricks with deferring plane->crtc and hoping for the best just
-	 * grab all crtc locks. Once we have per-plane locks we must update this
-	 * to only take the plane mutex.
-	 */
 	ret = drm_modeset_lock(&plane->mutex, state->acquire_ctx);
 	if (ret)
 		return ERR_PTR(ret);
@@ -350,7 +344,8 @@ EXPORT_SYMBOL(drm_atomic_get_connector_state);
 
 /**
  * drm_atomic_set_crtc_for_plane - set crtc for plane
- * @plane_state: atomic state object for the plane
+ * @state: the incoming atomic state
+ * @plane: the plane whose incoming state to update
  * @crtc: crtc to use for the plane
  *
  * Changing the assigned crtc for a plane requires us to grab the lock and state
@@ -363,20 +358,35 @@ EXPORT_SYMBOL(drm_atomic_get_connector_state);
  * sequence must be restarted. All other errors are fatal.
  */
 int
-drm_atomic_set_crtc_for_plane(struct drm_plane_state *plane_state,
-			      struct drm_crtc *crtc)
+drm_atomic_set_crtc_for_plane(struct drm_atomic_state *state,
+			      struct drm_plane *plane, struct drm_crtc *crtc)
 {
+	struct drm_plane_state *plane_state =
+			drm_atomic_get_plane_state(state, plane);
 	struct drm_crtc_state *crtc_state;
 
+	if (WARN_ON(IS_ERR(plane_state)))
+		return PTR_ERR(plane_state);
+
+	if (plane_state->crtc) {
+		crtc_state = drm_atomic_get_crtc_state(plane_state->state,
+						       plane_state->crtc);
+		if (WARN_ON(IS_ERR(crtc_state)))
+			return PTR_ERR(crtc_state);
+
+		crtc_state->plane_mask &= ~(1 << drm_plane_index(plane));
+	}
+
+	plane_state->crtc = crtc;
+
 	if (crtc) {
 		crtc_state = drm_atomic_get_crtc_state(plane_state->state,
 						       crtc);
 		if (IS_ERR(crtc_state))
 			return PTR_ERR(crtc_state);
+		crtc_state->plane_mask |= (1 << drm_plane_index(plane));
 	}
 
-	plane_state->crtc = crtc;
-
 	if (crtc)
 		DRM_DEBUG_KMS("Link plane state %p to [CRTC:%d]\n",
 			      plane_state, crtc->base.id);