diff --git a/drivers/media/platform/rcar-vin/rcar-v4l2.c b/drivers/media/platform/rcar-vin/rcar-v4l2.c
index 0bc4487e2482346220f1692338ed9247e10ac66b..929816b609f7892a347ff065b61ada6c5b98af28 100644
--- a/drivers/media/platform/rcar-vin/rcar-v4l2.c
+++ b/drivers/media/platform/rcar-vin/rcar-v4l2.c
@@ -683,6 +683,9 @@ int rvin_v4l2_probe(struct rvin_dev *vin)
 	struct v4l2_mbus_framefmt *mf = &fmt.format;
 	struct video_device *vdev = &vin->vdev;
 	struct v4l2_subdev *sd = vin_to_source(vin);
+#if defined(CONFIG_MEDIA_CONTROLLER)
+	int pad_idx;
+#endif
 	int ret;
 
 	v4l2_set_subdev_hostdata(sd, vin);
@@ -729,6 +732,19 @@ int rvin_v4l2_probe(struct rvin_dev *vin)
 	vdev->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING |
 		V4L2_CAP_READWRITE;
 
+	vin->src_pad_idx = 0;
+#if defined(CONFIG_MEDIA_CONTROLLER)
+	for (pad_idx = 0; pad_idx < sd->entity.num_pads; pad_idx++)
+		if (sd->entity.pads[pad_idx].flags
+				== MEDIA_PAD_FL_SOURCE)
+			break;
+	if (pad_idx >= sd->entity.num_pads)
+		return -EINVAL;
+
+	vin->src_pad_idx = pad_idx;
+#endif
+	fmt.pad = vin->src_pad_idx;
+
 	/* Try to improve our guess of a reasonable window format */
 	ret = v4l2_subdev_call(sd, pad, get_fmt, NULL, &fmt);
 	if (ret) {
diff --git a/drivers/media/platform/rcar-vin/rcar-vin.h b/drivers/media/platform/rcar-vin/rcar-vin.h
index 544a3b36280874faa6b96442804efc6045234e5b..a6dd6db246ab924bf6f22ab91a797d8b98598c76 100644
--- a/drivers/media/platform/rcar-vin/rcar-vin.h
+++ b/drivers/media/platform/rcar-vin/rcar-vin.h
@@ -87,6 +87,7 @@ struct rvin_graph_entity {
  *
  * @vdev:		V4L2 video device associated with VIN
  * @v4l2_dev:		V4L2 device
+ * @src_pad_idx:	source pad index for media controller drivers
  * @ctrl_handler:	V4L2 control handler
  * @notifier:		V4L2 asynchronous subdevs notifier
  * @entity:		entity in the DT for subdevice
@@ -117,6 +118,7 @@ struct rvin_dev {
 
 	struct video_device vdev;
 	struct v4l2_device v4l2_dev;
+	int src_pad_idx;
 	struct v4l2_ctrl_handler ctrl_handler;
 	struct v4l2_async_notifier notifier;
 	struct rvin_graph_entity entity;