v4l: vsp1: Add support for multiple DRM pipelines

The R-Car H3 ES2.0 VSP-DL instance has two LIF entities and can drive
two display pipelines at the same time. Refactor the VSP DRM code to
support that by introducing a vsp_drm_pipeline object that models one
display pipeline.
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Acked-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

drivers/media/platform/vsp1/vsp1_drm.h

@@ -18,32 +18,41 @@
 #include "vsp1_pipe.h"
 
 /**
- * vsp1_drm - State for the API exposed to the DRM driver
+ * vsp1_drm_pipeline - State for the API exposed to the DRM driver
  * @pipe: the VSP1 pipeline used for display
- * @num_inputs: number of active pipeline inputs at the beginning of an update
- * @inputs: source crop rectangle, destination compose rectangle and z-order
- *	position for every input
+ * @enabled: pipeline state at the beginning of an update
  * @du_complete: frame completion callback for the DU driver (optional)
  * @du_private: data to be passed to the du_complete callback
  */
-struct vsp1_drm {
+struct vsp1_drm_pipeline {
 	struct vsp1_pipeline pipe;
-	unsigned int num_inputs;
+	bool enabled;
+
+	/* Frame synchronisation */
+	void (*du_complete)(void *);
+	void *du_private;
+};
+
+/**
+ * vsp1_drm - State for the API exposed to the DRM driver
+ * @pipe: the VSP1 DRM pipeline used for display
+ * @inputs: source crop rectangle, destination compose rectangle and z-order
+ *	position for every input (indexed by RPF index)
+ */
+struct vsp1_drm {
+	struct vsp1_drm_pipeline pipe[VSP1_MAX_LIF];
+
 	struct {
-		bool enabled;
 		struct v4l2_rect crop;
 		struct v4l2_rect compose;
 		unsigned int zpos;
 	} inputs[VSP1_MAX_RPF];
-
-	/* Frame synchronisation */
-	void (*du_complete)(void *);
-	void *du_private;
 };
 
-static inline struct vsp1_drm *to_vsp1_drm(struct vsp1_pipeline *pipe)
+static inline struct vsp1_drm_pipeline *
+to_vsp1_drm_pipeline(struct vsp1_pipeline *pipe)
 {
-	return container_of(pipe, struct vsp1_drm, pipe);
+	return container_of(pipe, struct vsp1_drm_pipeline, pipe);
 }
 
 int vsp1_drm_init(struct vsp1_device *vsp1);