media: drivers: use video_device_pipeline_alloc_start()

Use video_device_pipeline_alloc_start() instead of manually
allocating/managing the media pipeline storage.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

drivers/media/platform/renesas/rcar-vin/rcar-dma.c

@@ -1244,8 +1244,6 @@ static int rvin_mc_validate_format(struct rvin_dev *vin, struct v4l2_subdev *sd,
 
 static int rvin_set_stream(struct rvin_dev *vin, int on)
 {
-	struct media_pipeline *pipe;
-	struct media_device *mdev;
 	struct v4l2_subdev *sd;
 	struct media_pad *pad;
 	int ret;
@@ -1273,17 +1271,7 @@ static int rvin_set_stream(struct rvin_dev *vin, int on)
 	if (ret)
 		return ret;
 
-	/*
-	 * The graph lock needs to be taken to protect concurrent
-	 * starts of multiple VIN instances as they might share
-	 * a common subdevice down the line and then should use
-	 * the same pipe.
-	 */
-	mdev = vin->vdev.entity.graph_obj.mdev;
-	mutex_lock(&mdev->graph_mutex);
-	pipe = media_entity_pipeline(&sd->entity) ? : &vin->vdev.pipe;
-	ret = __video_device_pipeline_start(&vin->vdev, pipe);
-	mutex_unlock(&mdev->graph_mutex);
+	ret = video_device_pipeline_alloc_start(&vin->vdev);
 	if (ret)
 		return ret;
 

drivers/media/platform/sunxi/sun4i-csi/sun4i_dma.c

@@ -266,7 +266,7 @@ static int sun4i_csi_start_streaming(struct vb2_queue *vq, unsigned int count)
 		goto err_clear_dma_queue;
 	}
 
-	ret = video_device_pipeline_start(&csi->vdev, &csi->vdev.pipe);
+	ret = video_device_pipeline_alloc_start(&csi->vdev);
 	if (ret < 0)
 		goto err_free_scratch_buffer;
 

drivers/media/platform/sunxi/sun6i-csi/sun6i_video.c

@@ -141,7 +141,7 @@ static int sun6i_video_start_streaming(struct vb2_queue *vq, unsigned int count)
 
 	video->sequence = 0;
 
-	ret = video_device_pipeline_start(&video->vdev, &video->vdev.pipe);
+	ret = video_device_pipeline_alloc_start(&video->vdev);
 	if (ret < 0)
 		goto clear_dma_queue;
 

drivers/media/platform/ti/cal/cal-video.c

@@ -708,7 +708,7 @@ static int cal_start_streaming(struct vb2_queue *vq, unsigned int count)
 	dma_addr_t addr;
 	int ret;
 
-	ret = video_device_pipeline_start(&ctx->vdev, &ctx->phy->pipe);
+	ret = video_device_pipeline_alloc_start(&ctx->vdev);
 	if (ret < 0) {
 		ctx_err(ctx, "Failed to start media pipeline: %d\n", ret);
 		goto error_release_buffers;

drivers/media/platform/ti/cal/cal.h

@@ -174,7 +174,6 @@ struct cal_camerarx {
 	struct device_node	*source_ep_node;
 	struct device_node	*source_node;
 	struct v4l2_subdev	*source;
-	struct media_pipeline	pipe;
 
 	struct v4l2_subdev	subdev;
 	struct media_pad	pads[CAL_CAMERARX_NUM_PADS];