media: staging/imx: Don't set driver data for v4l2_dev

The media device is already available via multiple methods, there is no
need to set driver data for v4l2_dev to the media device.

In imx_media_link_notify(), get media device from link->graph_obj.mdev.

In imx_media_capture_device_register(), get media device from
v4l2_dev->mdev.
Signed-off-by: Steve Longerbeam <slongerbeam@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

drivers/staging/media/imx/imx-media-capture.c

@@ -729,15 +729,16 @@ int imx_media_capture_device_register(struct imx_media_video_dev *vdev)
 {
 	struct capture_priv *priv = to_capture_priv(vdev);
 	struct v4l2_subdev *sd = priv->src_sd;
+	struct v4l2_device *v4l2_dev = sd->v4l2_dev;
 	struct video_device *vfd = vdev->vfd;
 	struct vb2_queue *vq = &priv->q;
 	struct v4l2_subdev_format fmt_src;
 	int ret;
 
 	/* get media device */
-	priv->md = dev_get_drvdata(sd->v4l2_dev->dev);
+	priv->md = container_of(v4l2_dev->mdev, struct imx_media_dev, md);
 
-	vfd->v4l2_dev = sd->v4l2_dev;
+	vfd->v4l2_dev = v4l2_dev;
 
 	ret = video_register_device(vfd, VFL_TYPE_GRABBER, -1);
 	if (ret) {

drivers/staging/media/imx/imx-media-dev-common.c

@@ -260,10 +260,11 @@ static int imx_media_inherit_controls(struct imx_media_dev *imxmd,
 static int imx_media_link_notify(struct media_link *link, u32 flags,
 				 unsigned int notification)
 {
+	struct imx_media_dev *imxmd = container_of(link->graph_obj.mdev,
+						   struct imx_media_dev, md);
 	struct media_entity *source = link->source->entity;
 	struct imx_media_pad_vdev *pad_vdev;
 	struct list_head *pad_vdev_list;
-	struct imx_media_dev *imxmd;
 	struct video_device *vfd;
 	struct v4l2_subdev *sd;
 	int pad_idx, ret;
@@ -279,8 +280,6 @@ static int imx_media_link_notify(struct media_link *link, u32 flags,
 	sd = media_entity_to_v4l2_subdev(source);
 	pad_idx = link->source->index;
 
-	imxmd = dev_get_drvdata(sd->v4l2_dev->dev);
-
 	pad_vdev_list = to_pad_vdev_list(sd, pad_idx);
 	if (!pad_vdev_list) {
 		/* nothing to do if source sd has no pad vdev list */
@@ -384,8 +383,6 @@ struct imx_media_dev *imx_media_dev_init(struct device *dev,
 		goto cleanup;
 	}
 
-	dev_set_drvdata(imxmd->v4l2_dev.dev, imxmd);
-
 	INIT_LIST_HEAD(&imxmd->vdev_list);
 
 	v4l2_async_notifier_init(&imxmd->notifier);