media: v4l: vsp1: Turn frame end completion status into a bitfield

We will soon need to return more than a boolean completion status from
the vsp1_dlm_irq_frame_end() IRQ handler. Turn the return value into a
bitfield to prepare for that. No functional change is introduced here.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

drivers/media/platform/vsp1/vsp1_dl.c

@@ -616,14 +616,18 @@ void vsp1_dl_list_commit(struct vsp1_dl_list *dl)
  * vsp1_dlm_irq_frame_end - Display list handler for the frame end interrupt
  * @dlm: the display list manager
  *
- * Return true if the previous display list has completed at frame end, or false
+ * Return a set of flags that indicates display list completion status.
- * if it has been delayed by one frame because the display list commit raced
+ *
- * with the frame end interrupt. The function always returns true in header mode
+ * The VSP1_DL_FRAME_END_COMPLETED flag indicates that the previous display list
- * as display list processing is then not continuous and races never occur.
+ * has completed at frame end. If the flag is not returned display list
+ * completion has been delayed by one frame because the display list commit
+ * raced with the frame end interrupt. The function always returns with the flag
+ * set in header mode as display list processing is then not continuous and
+ * races never occur.
  */
-bool vsp1_dlm_irq_frame_end(struct vsp1_dl_manager *dlm)
+unsigned int vsp1_dlm_irq_frame_end(struct vsp1_dl_manager *dlm)
 {
-	bool completed = false;
+	unsigned int flags = 0;
 
 	spin_lock(&dlm->lock);
 
@@ -634,7 +638,7 @@ bool vsp1_dlm_irq_frame_end(struct vsp1_dl_manager *dlm)
 	if (dlm->singleshot) {
 		__vsp1_dl_list_put(dlm->active);
 		dlm->active = NULL;
-		completed = true;
+		flags |= VSP1_DL_FRAME_END_COMPLETED;
 		goto done;
 	}
 
@@ -655,7 +659,7 @@ bool vsp1_dlm_irq_frame_end(struct vsp1_dl_manager *dlm)
 		__vsp1_dl_list_put(dlm->active);
 		dlm->active = dlm->queued;
 		dlm->queued = NULL;
-		completed = true;
+		flags |= VSP1_DL_FRAME_END_COMPLETED;
 	}
 
 	/*
@@ -672,7 +676,7 @@ bool vsp1_dlm_irq_frame_end(struct vsp1_dl_manager *dlm)
 done:
 	spin_unlock(&dlm->lock);
 
-	return completed;
+	return flags;
 }
 
 /* Hardware Setup */

drivers/media/platform/vsp1/vsp1_dl.h

@@ -20,6 +20,8 @@ struct vsp1_dl_fragment;
 struct vsp1_dl_list;
 struct vsp1_dl_manager;
 
+#define VSP1_DL_FRAME_END_COMPLETED		BIT(0)
+
 void vsp1_dlm_setup(struct vsp1_device *vsp1);
 
 struct vsp1_dl_manager *vsp1_dlm_create(struct vsp1_device *vsp1,
@@ -27,7 +29,7 @@ struct vsp1_dl_manager *vsp1_dlm_create(struct vsp1_device *vsp1,
 					unsigned int prealloc);
 void vsp1_dlm_destroy(struct vsp1_dl_manager *dlm);
 void vsp1_dlm_reset(struct vsp1_dl_manager *dlm);
-bool vsp1_dlm_irq_frame_end(struct vsp1_dl_manager *dlm);
+unsigned int vsp1_dlm_irq_frame_end(struct vsp1_dl_manager *dlm);
 
 struct vsp1_dl_list *vsp1_dl_list_get(struct vsp1_dl_manager *dlm);
 void vsp1_dl_list_put(struct vsp1_dl_list *dl);

drivers/media/platform/vsp1/vsp1_drm.c

@@ -34,12 +34,13 @@
  */
 
 static void vsp1_du_pipeline_frame_end(struct vsp1_pipeline *pipe,
-				       bool completed)
+				       unsigned int completion)
 {
 	struct vsp1_drm_pipeline *drm_pipe = to_vsp1_drm_pipeline(pipe);
 
 	if (drm_pipe->du_complete)
-		drm_pipe->du_complete(drm_pipe->du_private, completed);
+		drm_pipe->du_complete(drm_pipe->du_private,
+				      completion & VSP1_DL_FRAME_END_COMPLETED);
 }
 
 /* -----------------------------------------------------------------------------

drivers/media/platform/vsp1/vsp1_pipe.c

@@ -315,17 +315,17 @@ bool vsp1_pipeline_ready(struct vsp1_pipeline *pipe)
 
 void vsp1_pipeline_frame_end(struct vsp1_pipeline *pipe)
 {
-	bool completed;
+	unsigned int flags;
 
 	if (pipe == NULL)
 		return;
 
 	/*
 	 * If the DL commit raced with the frame end interrupt, the commit ends
-	 * up being postponed by one frame. @completed represents whether the
+	 * up being postponed by one frame. The returned flags tell whether the
 	 * active frame was finished or postponed.
 	 */
-	completed = vsp1_dlm_irq_frame_end(pipe->output->dlm);
+	flags = vsp1_dlm_irq_frame_end(pipe->output->dlm);
 
 	if (pipe->hgo)
 		vsp1_hgo_frame_end(pipe->hgo);
@@ -338,7 +338,7 @@ void vsp1_pipeline_frame_end(struct vsp1_pipeline *pipe)
 	 * frame_end to account for vblank events.
 	 */
 	if (pipe->frame_end)
-		pipe->frame_end(pipe, completed);
+		pipe->frame_end(pipe, flags);
 
 	pipe->sequence++;
 }

drivers/media/platform/vsp1/vsp1_pipe.h

@@ -118,7 +118,7 @@ struct vsp1_pipeline {
 	enum vsp1_pipeline_state state;
 	wait_queue_head_t wq;
 
-	void (*frame_end)(struct vsp1_pipeline *pipe, bool completed);
+	void (*frame_end)(struct vsp1_pipeline *pipe, unsigned int completion);
 
 	struct mutex lock;
 	struct kref kref;

drivers/media/platform/vsp1/vsp1_video.c

@@ -444,7 +444,7 @@ static void vsp1_video_pipeline_run(struct vsp1_pipeline *pipe)
 }
 
 static void vsp1_video_pipeline_frame_end(struct vsp1_pipeline *pipe,
-					  bool completed)
+					  unsigned int completion)
 {
 	struct vsp1_device *vsp1 = pipe->output->entity.vsp1;
 	enum vsp1_pipeline_state state;
@@ -452,7 +452,7 @@ static void vsp1_video_pipeline_frame_end(struct vsp1_pipeline *pipe,
 	unsigned int i;
 
 	/* M2M Pipelines should never call here with an incomplete frame. */
-	WARN_ON_ONCE(!completed);
+	WARN_ON_ONCE(!(completion & VSP1_DL_FRAME_END_COMPLETED));
 
 	spin_lock_irqsave(&pipe->irqlock, flags);