drm: rcar-du: Implement universal plane support

Explicitly create the CRTC primary plane instead of relying on the core
helpers to do so. This simplifies the plane logic by merging the KMS and
software planes.

Reject plane API operations on the primary planes for now, as that code
will anyway be refactored when implementing support for atomic updates.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>

1 files changed, 8 insertions, 9 deletions

diff --git a/drivers/gpu/drm/rcar-du/rcar_du_plane.h b/drivers/gpu/drm/rcar-du/rcar_du_plane.h
index 3021288b1a89..813b3212392a 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_plane.h
+++ b/drivers/gpu/drm/rcar-du/rcar_du_plane.h
@@ -22,17 +22,17 @@
 struct rcar_du_format_info;
 struct rcar_du_group;
 
-/* The RCAR DU has 8 hardware planes, shared between KMS planes and CRTCs. As
- * using KMS planes requires at least one of the CRTCs being enabled, no more
- * than 7 KMS planes can be available. We thus create 7 KMS planes and
- * 9 software planes (one for each KMS planes and one for each CRTC).
+/* The RCAR DU has 8 hardware planes, shared between primary and overlay planes.
+ * As using overlay planes requires at least one of the CRTCs being enabled, no
+ * more than 7 overlay planes can be available. We thus create 1 primary plane
+ * per CRTC and 7 overlay planes, for a total of up to 9 KMS planes.
  */
-
-#define RCAR_DU_NUM_KMS_PLANES		7
+#define RCAR_DU_NUM_KMS_PLANES		9
 #define RCAR_DU_NUM_HW_PLANES		8
-#define RCAR_DU_NUM_SW_PLANES		9
 
 struct rcar_du_plane {
+	struct drm_plane plane;
+
 	struct rcar_du_group *group;
 	struct drm_crtc *crtc;
 
@@ -58,7 +58,7 @@ struct rcar_du_plane {
 };
 
 struct rcar_du_planes {
-	struct rcar_du_plane planes[RCAR_DU_NUM_SW_PLANES];
+	struct rcar_du_plane planes[RCAR_DU_NUM_KMS_PLANES];
 	unsigned int free;
 	struct mutex lock;
 
@@ -68,7 +68,6 @@ struct rcar_du_planes {
 };
 
 int rcar_du_planes_init(struct rcar_du_group *rgrp);
-int rcar_du_planes_register(struct rcar_du_group *rgrp);
 
 void rcar_du_plane_setup(struct rcar_du_plane *plane);
 void rcar_du_plane_update_base(struct rcar_du_plane *plane);