media: sun6i-csi: Get bridge subdev directly in capture stream ops

The remote subdev connected to the capture video device is always
our bridge, so get the bridge subdev directly instead of using a
dedicated helper (which is removed by this commit).
Signed-off-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
Acked-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

drivers/media/platform/sunxi/sun6i-csi/sun6i_csi_capture.c

@@ -42,22 +42,6 @@ void sun6i_csi_capture_format(struct sun6i_csi_device *csi_dev,
 		*field = csi_dev->capture.format.fmt.pix.field;
 }
 
-static struct v4l2_subdev *
-sun6i_csi_capture_remote_subdev(struct sun6i_csi_capture *capture, u32 *pad)
-{
-	struct media_pad *remote;
-
-	remote = media_pad_remote_pad_first(&capture->pad);
-
-	if (!remote || !is_media_entity_v4l2_subdev(remote->entity))
-		return NULL;
-
-	if (pad)
-		*pad = remote->index;
-
-	return media_entity_to_v4l2_subdev(remote->entity);
-}
-
 /* Format */
 
 static const struct sun6i_csi_capture_format sun6i_csi_capture_formats[] = {
@@ -822,8 +806,8 @@ static int sun6i_csi_capture_start_streaming(struct vb2_queue *queue,
 	struct sun6i_csi_capture *capture = &csi_dev->capture;
 	struct sun6i_csi_capture_state *state = &capture->state;
 	struct video_device *video_dev = &capture->video_dev;
+	struct v4l2_subdev *subdev = &csi_dev->bridge.subdev;
 	struct device *dev = csi_dev->dev;
-	struct v4l2_subdev *subdev;
 	int ret;
 
 	state->sequence = 0;
@@ -832,12 +816,6 @@ static int sun6i_csi_capture_start_streaming(struct vb2_queue *queue,
 	if (ret < 0)
 		goto error_state;
 
-	subdev = sun6i_csi_capture_remote_subdev(capture, NULL);
-	if (!subdev) {
-		ret = -EINVAL;
-		goto error_media_pipeline;
-	}
-
 	/* PM */
 
 	ret = pm_runtime_resume_and_get(dev);
@@ -886,12 +864,10 @@ static void sun6i_csi_capture_stop_streaming(struct vb2_queue *queue)
 {
 	struct sun6i_csi_device *csi_dev = vb2_get_drv_priv(queue);
 	struct sun6i_csi_capture *capture = &csi_dev->capture;
+	struct v4l2_subdev *subdev = &csi_dev->bridge.subdev;
 	struct device *dev = csi_dev->dev;
-	struct v4l2_subdev *subdev;
 
-	subdev = sun6i_csi_capture_remote_subdev(capture, NULL);
-	if (subdev)
-		v4l2_subdev_call(subdev, video, s_stream, 0);
+	v4l2_subdev_call(subdev, video, s_stream, 0);
 
 	sun6i_csi_capture_disable(csi_dev);
 	sun6i_csi_capture_irq_disable(csi_dev);