drm/atomic: Introduce state->obj backpointers

Useful since this way we can pass around just the state objects and
will get ther real object, too.

Specifically this allows us to again simplify the parameters for
set_crtc_for_plane.

v2: msm already has it's own specific plane_reset hook, don't forget
that one!

v3: Fixup kerneldoc, reported by 0-day builder.

Cc: Rob Clark <robdclark@gmail.com>
Reviewed-by: Rob Clark <robdclark@gmail.com> (v2)
Tested-by: Rob Clark <robdclark@gmail.com> (v2)
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>

2 files changed, 11 insertions, 2 deletions

diff --git a/include/drm/drm_atomic.h b/include/drm/drm_atomic.h
index ad2229574dd9..e224ccfa11ca 100644
--- a/include/drm/drm_atomic.h
+++ b/include/drm/drm_atomic.h
@@ -46,8 +46,8 @@ drm_atomic_get_connector_state(struct drm_atomic_state *state,
                                struct drm_connector *connector);
 
 int __must_check
-drm_atomic_set_crtc_for_plane(struct drm_atomic_state *state,
-                              struct drm_plane *plane, struct drm_crtc *crtc);
+drm_atomic_set_crtc_for_plane(struct drm_plane_state *plane_state,
+                              struct drm_crtc *crtc);
 void drm_atomic_set_fb_for_plane(struct drm_plane_state *plane_state,
                                  struct drm_framebuffer *fb);
 int __must_check
diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
index 4ee78212f8bf..fd8139ca629a 100644
--- a/include/drm/drm_crtc.h
+++ b/include/drm/drm_crtc.h
@@ -237,6 +237,7 @@ struct drm_atomic_state;
 
 /**
  * struct drm_crtc_state - mutable CRTC state
+ * @crtc: backpointer to the CRTC
  * @enable: whether the CRTC should be enabled, gates all other state
  * @active: whether the CRTC is actively displaying (used for DPMS)
  * @mode_changed: for use by helpers and drivers when computing state updates
@@ -257,6 +258,8 @@ struct drm_atomic_state;
  * assignment, @active controls the actual hardware state.
  */
 struct drm_crtc_state {
+        struct drm_crtc *crtc;
+
         bool enable;
         bool active;
 
@@ -457,11 +460,14 @@ struct drm_crtc {
 
 /**
  * struct drm_connector_state - mutable connector state
+ * @connector: backpointer to the connector
  * @crtc: CRTC to connect connector to, NULL if disabled
  * @best_encoder: can be used by helpers and drivers to select the encoder
  * @state: backpointer to global drm_atomic_state
  */
 struct drm_connector_state {
+        struct drm_connector *connector;
+
         struct drm_crtc *crtc;  /* do not write directly, use drm_atomic_set_crtc_for_connector() */
 
         struct drm_encoder *best_encoder;
@@ -701,6 +707,7 @@ struct drm_connector {
 
 /**
  * struct drm_plane_state - mutable plane state
+ * @plane: backpointer to the plane
  * @crtc: currently bound CRTC, NULL if disabled
  * @fb: currently bound framebuffer
  * @fence: optional fence to wait for before scanning out @fb
@@ -717,6 +724,8 @@ struct drm_connector {
  * @state: backpointer to global drm_atomic_state
  */
 struct drm_plane_state {
+        struct drm_plane *plane;
+
         struct drm_crtc *crtc;   /* do not write directly, use drm_atomic_set_crtc_for_plane() */
         struct drm_framebuffer *fb;  /* do not write directly, use drm_atomic_set_fb_for_plane() */
         struct fence *fence;