diff mbox series

[08/11] rcar-vin: Create a callback to setup media links

Message ID 20210413180253.2575451-9-niklas.soderlund+renesas@ragnatech.se
State Superseded
Headers show
Series rcar-vin: Add r8a779a0 support | expand

Commit Message

Niklas Söderlund April 13, 2021, 6:02 p.m. UTC 
New IP versions will have different media graphs and require a different
link setup. Breakout the specific link setup to a callback that are
associated with the group.

Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
---
 drivers/media/platform/rcar-vin/rcar-core.c | 97 ++++++++++++---------
 drivers/media/platform/rcar-vin/rcar-vin.h  |  3 +
 2 files changed, 57 insertions(+), 43 deletions(-)

Comments

Jacopo Mondi July 7, 2021, 10:33 a.m. UTC | #1 
Hi Niklas,

On Tue, Apr 13, 2021 at 08:02:50PM +0200, Niklas Söderlund wrote:
> New IP versions will have different media graphs and require a different

> link setup. Breakout the specific link setup to a callback that are

> associated with the group.

>

> Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>

> ---

>  drivers/media/platform/rcar-vin/rcar-core.c | 97 ++++++++++++---------

>  drivers/media/platform/rcar-vin/rcar-vin.h  |  3 +

>  2 files changed, 57 insertions(+), 43 deletions(-)

>

> diff --git a/drivers/media/platform/rcar-vin/rcar-core.c b/drivers/media/platform/rcar-vin/rcar-core.c

> index 2628637084ae2aa9..d03ecd443b01c2b3 100644

> --- a/drivers/media/platform/rcar-vin/rcar-core.c

> +++ b/drivers/media/platform/rcar-vin/rcar-core.c

> @@ -247,7 +247,8 @@ static void rvin_group_cleanup(struct rvin_group *group)

>  	mutex_destroy(&group->lock);

>  }

>

> -static int rvin_group_init(struct rvin_group *group, struct rvin_dev *vin)

> +static int rvin_group_init(struct rvin_group *group, struct rvin_dev *vin,

> +			   void (*link_setup)(struct rvin_dev *))

>  {

>  	struct media_device *mdev = &group->mdev;

>  	const struct of_device_id *match;

> @@ -263,6 +264,8 @@ static int rvin_group_init(struct rvin_group *group, struct rvin_dev *vin)

>

>  	vin_dbg(vin, "found %u enabled VIN's in DT", group->count);

>

> +	group->link_setup = link_setup;

> +

>  	mdev->dev = vin->dev;

>  	mdev->ops = &rvin_media_ops;

>

> @@ -295,7 +298,8 @@ static void rvin_group_release(struct kref *kref)

>  	mutex_unlock(&rvin_group_lock);

>  }

>

> -static int rvin_group_get(struct rvin_dev *vin)

> +static int rvin_group_get(struct rvin_dev *vin,

> +			  void (*link_setup)(struct rvin_dev *))

>  {

>  	struct rvin_group *group;

>  	u32 id;

> @@ -327,7 +331,7 @@ static int rvin_group_get(struct rvin_dev *vin)

>  			goto err_group;

>  		}

>

> -		ret = rvin_group_init(group, vin);

> +		ret = rvin_group_init(group, vin, link_setup);

>  		if (ret) {

>  			kfree(group);

>  			vin_err(vin, "Failed to initialize group\n");

> @@ -386,7 +390,6 @@ static void rvin_group_put(struct rvin_dev *vin)

>  static int rvin_group_notify_complete(struct v4l2_async_notifier *notifier)

>  {

>  	struct rvin_dev *vin = v4l2_dev_to_vin(notifier->v4l2_dev);

> -	const struct rvin_group_route *route;

>  	unsigned int i;

>  	int ret;

>

> @@ -410,44 +413,7 @@ static int rvin_group_notify_complete(struct v4l2_async_notifier *notifier)

>  		}

>  	}

>

> -	/* Create all media device links between VINs and CSI-2's. */

> -	mutex_lock(&vin->group->lock);

> -	for (route = vin->info->routes; route->mask; route++) {

> -		struct media_pad *source_pad, *sink_pad;

> -		struct media_entity *source, *sink;

> -		unsigned int source_idx;

> -

> -		/* Check that VIN is part of the group. */

> -		if (!vin->group->vin[route->vin])

> -			continue;

> -

> -		/* Check that VIN' master is part of the group. */

> -		if (!vin->group->vin[rvin_group_id_to_master(route->vin)])

> -			continue;

> -

> -		/* Check that CSI-2 is part of the group. */

> -		if (!vin->group->remotes[route->csi].subdev)

> -			continue;

> -

> -		source = &vin->group->remotes[route->csi].subdev->entity;

> -		source_idx = rvin_group_csi_channel_to_pad(route->channel);

> -		source_pad = &source->pads[source_idx];

> -

> -		sink = &vin->group->vin[route->vin]->vdev.entity;

> -		sink_pad = &sink->pads[0];

> -

> -		/* Skip if link already exists. */

> -		if (media_entity_find_link(source_pad, sink_pad))

> -			continue;

> -

> -		ret = media_create_pad_link(source, source_idx, sink, 0, 0);

> -		if (ret) {

> -			vin_err(vin, "Error adding link from %s to %s\n",

> -				source->name, sink->name);

> -			break;

> -		}

> -	}

> -	mutex_unlock(&vin->group->lock);

> +	vin->group->link_setup(vin);


Compared to the previuous version, we've lost the ability to return
erros on failures in link creation. Is it intentional ?

Thanks
   j

>

>  	return ret;

>  }

> @@ -953,6 +919,51 @@ static int rvin_parallel_init(struct rvin_dev *vin)

>   * CSI-2

>   */

>

> +static void rvin_csi2_setup_links(struct rvin_dev *vin)

> +{

> +	const struct rvin_group_route *route;

> +	int ret;

> +

> +	/* Create all media device links between VINs and CSI-2's. */

> +	mutex_lock(&vin->group->lock);

> +	for (route = vin->info->routes; route->mask; route++) {

> +		struct media_pad *source_pad, *sink_pad;

> +		struct media_entity *source, *sink;

> +		unsigned int source_idx;

> +

> +		/* Check that VIN is part of the group. */

> +		if (!vin->group->vin[route->vin])

> +			continue;

> +

> +		/* Check that VIN' master is part of the group. */

> +		if (!vin->group->vin[rvin_group_id_to_master(route->vin)])

> +			continue;

> +

> +		/* Check that CSI-2 is part of the group. */

> +		if (!vin->group->remotes[route->csi].subdev)

> +			continue;

> +

> +		source = &vin->group->remotes[route->csi].subdev->entity;

> +		source_idx = rvin_group_csi_channel_to_pad(route->channel);

> +		source_pad = &source->pads[source_idx];

> +

> +		sink = &vin->group->vin[route->vin]->vdev.entity;

> +		sink_pad = &sink->pads[0];

> +

> +		/* Skip if link already exists. */

> +		if (media_entity_find_link(source_pad, sink_pad))

> +			continue;

> +

> +		ret = media_create_pad_link(source, source_idx, sink, 0, 0);

> +		if (ret) {

> +			vin_err(vin, "Error adding link from %s to %s\n",

> +				source->name, sink->name);

> +			break;

> +		}

> +	}

> +	mutex_unlock(&vin->group->lock);

> +}

> +

>  static void rvin_csi2_cleanup(struct rvin_dev *vin)

>  {

>  	rvin_group_notifier_cleanup(vin);

> @@ -973,7 +984,7 @@ static int rvin_csi2_init(struct rvin_dev *vin)

>  	if (ret < 0)

>  		return ret;

>

> -	ret = rvin_group_get(vin);

> +	ret = rvin_group_get(vin, rvin_csi2_setup_links);

>  	if (ret)

>  		goto err_controls;

>

> diff --git a/drivers/media/platform/rcar-vin/rcar-vin.h b/drivers/media/platform/rcar-vin/rcar-vin.h

> index 39207aaf39ef9391..f2c32d5ceb7f83d9 100644

> --- a/drivers/media/platform/rcar-vin/rcar-vin.h

> +++ b/drivers/media/platform/rcar-vin/rcar-vin.h

> @@ -269,6 +269,7 @@ struct rvin_dev {

>   * @count:		number of enabled VIN instances found in DT

>   * @notifier:		group notifier for CSI-2 async subdevices

>   * @vin:		VIN instances which are part of the group

> + * @link_setup:		Callback to create all links for the media graph

>   * @remotes:		array of pairs of fwnode and subdev pointers

>   *			to all remote subdevices.

>   */

> @@ -282,6 +283,8 @@ struct rvin_group {

>  	struct v4l2_async_notifier notifier;

>  	struct rvin_dev *vin[RCAR_VIN_NUM];

>

> +	void (*link_setup)(struct rvin_dev *vin);

> +

>  	struct {

>  		struct v4l2_async_subdev *asd;

>  		struct v4l2_subdev *subdev;

> --

> 2.31.1

>
Niklas Söderlund July 8, 2021, 3:46 p.m. UTC | #2 
Hi Jacopo,

Thanks for your review effort.

On 2021-07-07 12:33:55 +0200, Jacopo Mondi wrote:
> Hi Niklas,

> 

> On Tue, Apr 13, 2021 at 08:02:50PM +0200, Niklas Söderlund wrote:

> > New IP versions will have different media graphs and require a different

> > link setup. Breakout the specific link setup to a callback that are

> > associated with the group.

> >

> > Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>

> > ---

> >  drivers/media/platform/rcar-vin/rcar-core.c | 97 ++++++++++++---------

> >  drivers/media/platform/rcar-vin/rcar-vin.h  |  3 +

> >  2 files changed, 57 insertions(+), 43 deletions(-)

> >

> > diff --git a/drivers/media/platform/rcar-vin/rcar-core.c b/drivers/media/platform/rcar-vin/rcar-core.c

> > index 2628637084ae2aa9..d03ecd443b01c2b3 100644

> > --- a/drivers/media/platform/rcar-vin/rcar-core.c

> > +++ b/drivers/media/platform/rcar-vin/rcar-core.c

> > @@ -247,7 +247,8 @@ static void rvin_group_cleanup(struct rvin_group *group)

> >  	mutex_destroy(&group->lock);

> >  }

> >

> > -static int rvin_group_init(struct rvin_group *group, struct rvin_dev *vin)

> > +static int rvin_group_init(struct rvin_group *group, struct rvin_dev *vin,

> > +			   void (*link_setup)(struct rvin_dev *))

> >  {

> >  	struct media_device *mdev = &group->mdev;

> >  	const struct of_device_id *match;

> > @@ -263,6 +264,8 @@ static int rvin_group_init(struct rvin_group *group, struct rvin_dev *vin)

> >

> >  	vin_dbg(vin, "found %u enabled VIN's in DT", group->count);

> >

> > +	group->link_setup = link_setup;

> > +

> >  	mdev->dev = vin->dev;

> >  	mdev->ops = &rvin_media_ops;

> >

> > @@ -295,7 +298,8 @@ static void rvin_group_release(struct kref *kref)

> >  	mutex_unlock(&rvin_group_lock);

> >  }

> >

> > -static int rvin_group_get(struct rvin_dev *vin)

> > +static int rvin_group_get(struct rvin_dev *vin,

> > +			  void (*link_setup)(struct rvin_dev *))

> >  {

> >  	struct rvin_group *group;

> >  	u32 id;

> > @@ -327,7 +331,7 @@ static int rvin_group_get(struct rvin_dev *vin)

> >  			goto err_group;

> >  		}

> >

> > -		ret = rvin_group_init(group, vin);

> > +		ret = rvin_group_init(group, vin, link_setup);

> >  		if (ret) {

> >  			kfree(group);

> >  			vin_err(vin, "Failed to initialize group\n");

> > @@ -386,7 +390,6 @@ static void rvin_group_put(struct rvin_dev *vin)

> >  static int rvin_group_notify_complete(struct v4l2_async_notifier *notifier)

> >  {

> >  	struct rvin_dev *vin = v4l2_dev_to_vin(notifier->v4l2_dev);

> > -	const struct rvin_group_route *route;

> >  	unsigned int i;

> >  	int ret;

> >

> > @@ -410,44 +413,7 @@ static int rvin_group_notify_complete(struct v4l2_async_notifier *notifier)

> >  		}

> >  	}

> >

> > -	/* Create all media device links between VINs and CSI-2's. */

> > -	mutex_lock(&vin->group->lock);

> > -	for (route = vin->info->routes; route->mask; route++) {

> > -		struct media_pad *source_pad, *sink_pad;

> > -		struct media_entity *source, *sink;

> > -		unsigned int source_idx;

> > -

> > -		/* Check that VIN is part of the group. */

> > -		if (!vin->group->vin[route->vin])

> > -			continue;

> > -

> > -		/* Check that VIN' master is part of the group. */

> > -		if (!vin->group->vin[rvin_group_id_to_master(route->vin)])

> > -			continue;

> > -

> > -		/* Check that CSI-2 is part of the group. */

> > -		if (!vin->group->remotes[route->csi].subdev)

> > -			continue;

> > -

> > -		source = &vin->group->remotes[route->csi].subdev->entity;

> > -		source_idx = rvin_group_csi_channel_to_pad(route->channel);

> > -		source_pad = &source->pads[source_idx];

> > -

> > -		sink = &vin->group->vin[route->vin]->vdev.entity;

> > -		sink_pad = &sink->pads[0];

> > -

> > -		/* Skip if link already exists. */

> > -		if (media_entity_find_link(source_pad, sink_pad))

> > -			continue;

> > -

> > -		ret = media_create_pad_link(source, source_idx, sink, 0, 0);

> > -		if (ret) {

> > -			vin_err(vin, "Error adding link from %s to %s\n",

> > -				source->name, sink->name);

> > -			break;

> > -		}

> > -	}

> > -	mutex_unlock(&vin->group->lock);

> > +	vin->group->link_setup(vin);

> 

> Compared to the previuous version, we've lost the ability to return

> erros on failures in link creation. Is it intentional ?


This is a good point, I will fix it for v2 (same for the comment in the 
ISP case you point out in 11/11).

> 

> Thanks

>    j

> 

> >

> >  	return ret;

> >  }

> > @@ -953,6 +919,51 @@ static int rvin_parallel_init(struct rvin_dev *vin)

> >   * CSI-2

> >   */

> >

> > +static void rvin_csi2_setup_links(struct rvin_dev *vin)

> > +{

> > +	const struct rvin_group_route *route;

> > +	int ret;

> > +

> > +	/* Create all media device links between VINs and CSI-2's. */

> > +	mutex_lock(&vin->group->lock);

> > +	for (route = vin->info->routes; route->mask; route++) {

> > +		struct media_pad *source_pad, *sink_pad;

> > +		struct media_entity *source, *sink;

> > +		unsigned int source_idx;

> > +

> > +		/* Check that VIN is part of the group. */

> > +		if (!vin->group->vin[route->vin])

> > +			continue;

> > +

> > +		/* Check that VIN' master is part of the group. */

> > +		if (!vin->group->vin[rvin_group_id_to_master(route->vin)])

> > +			continue;

> > +

> > +		/* Check that CSI-2 is part of the group. */

> > +		if (!vin->group->remotes[route->csi].subdev)

> > +			continue;

> > +

> > +		source = &vin->group->remotes[route->csi].subdev->entity;

> > +		source_idx = rvin_group_csi_channel_to_pad(route->channel);

> > +		source_pad = &source->pads[source_idx];

> > +

> > +		sink = &vin->group->vin[route->vin]->vdev.entity;

> > +		sink_pad = &sink->pads[0];

> > +

> > +		/* Skip if link already exists. */

> > +		if (media_entity_find_link(source_pad, sink_pad))

> > +			continue;

> > +

> > +		ret = media_create_pad_link(source, source_idx, sink, 0, 0);

> > +		if (ret) {

> > +			vin_err(vin, "Error adding link from %s to %s\n",

> > +				source->name, sink->name);

> > +			break;

> > +		}

> > +	}

> > +	mutex_unlock(&vin->group->lock);

> > +}

> > +

> >  static void rvin_csi2_cleanup(struct rvin_dev *vin)

> >  {

> >  	rvin_group_notifier_cleanup(vin);

> > @@ -973,7 +984,7 @@ static int rvin_csi2_init(struct rvin_dev *vin)

> >  	if (ret < 0)

> >  		return ret;

> >

> > -	ret = rvin_group_get(vin);

> > +	ret = rvin_group_get(vin, rvin_csi2_setup_links);

> >  	if (ret)

> >  		goto err_controls;

> >

> > diff --git a/drivers/media/platform/rcar-vin/rcar-vin.h b/drivers/media/platform/rcar-vin/rcar-vin.h

> > index 39207aaf39ef9391..f2c32d5ceb7f83d9 100644

> > --- a/drivers/media/platform/rcar-vin/rcar-vin.h

> > +++ b/drivers/media/platform/rcar-vin/rcar-vin.h

> > @@ -269,6 +269,7 @@ struct rvin_dev {

> >   * @count:		number of enabled VIN instances found in DT

> >   * @notifier:		group notifier for CSI-2 async subdevices

> >   * @vin:		VIN instances which are part of the group

> > + * @link_setup:		Callback to create all links for the media graph

> >   * @remotes:		array of pairs of fwnode and subdev pointers

> >   *			to all remote subdevices.

> >   */

> > @@ -282,6 +283,8 @@ struct rvin_group {

> >  	struct v4l2_async_notifier notifier;

> >  	struct rvin_dev *vin[RCAR_VIN_NUM];

> >

> > +	void (*link_setup)(struct rvin_dev *vin);

> > +

> >  	struct {

> >  		struct v4l2_async_subdev *asd;

> >  		struct v4l2_subdev *subdev;

> > --

> > 2.31.1

> >


-- 
Regards,
Niklas Söderlund
diff mbox series

Patch

diff --git a/drivers/media/platform/rcar-vin/rcar-core.c b/drivers/media/platform/rcar-vin/rcar-core.c
index 2628637084ae2aa9..d03ecd443b01c2b3 100644
--- a/drivers/media/platform/rcar-vin/rcar-core.c
+++ b/drivers/media/platform/rcar-vin/rcar-core.c
@@ -247,7 +247,8 @@  static void rvin_group_cleanup(struct rvin_group *group)
 	mutex_destroy(&group->lock);
 }
 
-static int rvin_group_init(struct rvin_group *group, struct rvin_dev *vin)
+static int rvin_group_init(struct rvin_group *group, struct rvin_dev *vin,
+			   void (*link_setup)(struct rvin_dev *))
 {
 	struct media_device *mdev = &group->mdev;
 	const struct of_device_id *match;
@@ -263,6 +264,8 @@  static int rvin_group_init(struct rvin_group *group, struct rvin_dev *vin)
 
 	vin_dbg(vin, "found %u enabled VIN's in DT", group->count);
 
+	group->link_setup = link_setup;
+
 	mdev->dev = vin->dev;
 	mdev->ops = &rvin_media_ops;
 
@@ -295,7 +298,8 @@  static void rvin_group_release(struct kref *kref)
 	mutex_unlock(&rvin_group_lock);
 }
 
-static int rvin_group_get(struct rvin_dev *vin)
+static int rvin_group_get(struct rvin_dev *vin,
+			  void (*link_setup)(struct rvin_dev *))
 {
 	struct rvin_group *group;
 	u32 id;
@@ -327,7 +331,7 @@  static int rvin_group_get(struct rvin_dev *vin)
 			goto err_group;
 		}
 
-		ret = rvin_group_init(group, vin);
+		ret = rvin_group_init(group, vin, link_setup);
 		if (ret) {
 			kfree(group);
 			vin_err(vin, "Failed to initialize group\n");
@@ -386,7 +390,6 @@  static void rvin_group_put(struct rvin_dev *vin)
 static int rvin_group_notify_complete(struct v4l2_async_notifier *notifier)
 {
 	struct rvin_dev *vin = v4l2_dev_to_vin(notifier->v4l2_dev);
-	const struct rvin_group_route *route;
 	unsigned int i;
 	int ret;
 
@@ -410,44 +413,7 @@  static int rvin_group_notify_complete(struct v4l2_async_notifier *notifier)
 		}
 	}
 
-	/* Create all media device links between VINs and CSI-2's. */
-	mutex_lock(&vin->group->lock);
-	for (route = vin->info->routes; route->mask; route++) {
-		struct media_pad *source_pad, *sink_pad;
-		struct media_entity *source, *sink;
-		unsigned int source_idx;
-
-		/* Check that VIN is part of the group. */
-		if (!vin->group->vin[route->vin])
-			continue;
-
-		/* Check that VIN' master is part of the group. */
-		if (!vin->group->vin[rvin_group_id_to_master(route->vin)])
-			continue;
-
-		/* Check that CSI-2 is part of the group. */
-		if (!vin->group->remotes[route->csi].subdev)
-			continue;
-
-		source = &vin->group->remotes[route->csi].subdev->entity;
-		source_idx = rvin_group_csi_channel_to_pad(route->channel);
-		source_pad = &source->pads[source_idx];
-
-		sink = &vin->group->vin[route->vin]->vdev.entity;
-		sink_pad = &sink->pads[0];
-
-		/* Skip if link already exists. */
-		if (media_entity_find_link(source_pad, sink_pad))
-			continue;
-
-		ret = media_create_pad_link(source, source_idx, sink, 0, 0);
-		if (ret) {
-			vin_err(vin, "Error adding link from %s to %s\n",
-				source->name, sink->name);
-			break;
-		}
-	}
-	mutex_unlock(&vin->group->lock);
+	vin->group->link_setup(vin);
 
 	return ret;
 }
@@ -953,6 +919,51 @@  static int rvin_parallel_init(struct rvin_dev *vin)
  * CSI-2
  */
 
+static void rvin_csi2_setup_links(struct rvin_dev *vin)
+{
+	const struct rvin_group_route *route;
+	int ret;
+
+	/* Create all media device links between VINs and CSI-2's. */
+	mutex_lock(&vin->group->lock);
+	for (route = vin->info->routes; route->mask; route++) {
+		struct media_pad *source_pad, *sink_pad;
+		struct media_entity *source, *sink;
+		unsigned int source_idx;
+
+		/* Check that VIN is part of the group. */
+		if (!vin->group->vin[route->vin])
+			continue;
+
+		/* Check that VIN' master is part of the group. */
+		if (!vin->group->vin[rvin_group_id_to_master(route->vin)])
+			continue;
+
+		/* Check that CSI-2 is part of the group. */
+		if (!vin->group->remotes[route->csi].subdev)
+			continue;
+
+		source = &vin->group->remotes[route->csi].subdev->entity;
+		source_idx = rvin_group_csi_channel_to_pad(route->channel);
+		source_pad = &source->pads[source_idx];
+
+		sink = &vin->group->vin[route->vin]->vdev.entity;
+		sink_pad = &sink->pads[0];
+
+		/* Skip if link already exists. */
+		if (media_entity_find_link(source_pad, sink_pad))
+			continue;
+
+		ret = media_create_pad_link(source, source_idx, sink, 0, 0);
+		if (ret) {
+			vin_err(vin, "Error adding link from %s to %s\n",
+				source->name, sink->name);
+			break;
+		}
+	}
+	mutex_unlock(&vin->group->lock);
+}
+
 static void rvin_csi2_cleanup(struct rvin_dev *vin)
 {
 	rvin_group_notifier_cleanup(vin);
@@ -973,7 +984,7 @@  static int rvin_csi2_init(struct rvin_dev *vin)
 	if (ret < 0)
 		return ret;
 
-	ret = rvin_group_get(vin);
+	ret = rvin_group_get(vin, rvin_csi2_setup_links);
 	if (ret)
 		goto err_controls;
 
diff --git a/drivers/media/platform/rcar-vin/rcar-vin.h b/drivers/media/platform/rcar-vin/rcar-vin.h
index 39207aaf39ef9391..f2c32d5ceb7f83d9 100644
--- a/drivers/media/platform/rcar-vin/rcar-vin.h
+++ b/drivers/media/platform/rcar-vin/rcar-vin.h
@@ -269,6 +269,7 @@  struct rvin_dev {
  * @count:		number of enabled VIN instances found in DT
  * @notifier:		group notifier for CSI-2 async subdevices
  * @vin:		VIN instances which are part of the group
+ * @link_setup:		Callback to create all links for the media graph
  * @remotes:		array of pairs of fwnode and subdev pointers
  *			to all remote subdevices.
  */
@@ -282,6 +283,8 @@  struct rvin_group {
 	struct v4l2_async_notifier notifier;
 	struct rvin_dev *vin[RCAR_VIN_NUM];
 
+	void (*link_setup)(struct rvin_dev *vin);
+
 	struct {
 		struct v4l2_async_subdev *asd;
 		struct v4l2_subdev *subdev;