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Commit 820342ac authored by Sakari Ailus's avatar Sakari Ailus Committed by Mauro Carvalho Chehab
Browse files

media: v4l2-async: Add v4l2_async_notifier_add_fwnode_remote_subdev 



v4l2_async_notifier_add_fwnode_remote_subdev is a convenience function for
parsing information on V4L2 fwnode subdevs.

Signed-off-by: default avatarSakari Ailus <sakari.ailus@linux.intel.com>
Tested-by: default avatarNiklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab+samsung@kernel.org>
parent 016413d9

drivers/media/v4l2-core/v4l2-async.c

+23 −0
Original line number Diff line number Diff line
@@ -606,6 +606,29 @@ v4l2_async_notifier_add_fwnode_subdev(struct v4l2_async_notifier *notifier, 
}

EXPORT_SYMBOL_GPL(v4l2_async_notifier_add_fwnode_subdev);



int

v4l2_async_notifier_add_fwnode_remote_subdev(struct v4l2_async_notifier *notif,

					     struct fwnode_handle *endpoint,

					     struct v4l2_async_subdev *asd)

{

	struct fwnode_handle *remote;

	int ret;



	remote = fwnode_graph_get_remote_port_parent(endpoint);

	if (!remote)

		return -ENOTCONN;



	asd->match_type = V4L2_ASYNC_MATCH_FWNODE;

	asd->match.fwnode = remote;



	ret = v4l2_async_notifier_add_subdev(notif, asd);

	if (ret)

		fwnode_handle_put(remote);



	return ret;

}

EXPORT_SYMBOL_GPL(v4l2_async_notifier_add_fwnode_remote_subdev);



struct v4l2_async_subdev *

v4l2_async_notifier_add_i2c_subdev(struct v4l2_async_notifier *notifier,

				   int adapter_id, unsigned short address,

include/media/v4l2-async.h

+25 −0
Original line number Diff line number Diff line
@@ -181,6 +181,31 @@ v4l2_async_notifier_add_fwnode_subdev(struct v4l2_async_notifier *notifier, 
				      struct fwnode_handle *fwnode,

				      unsigned int asd_struct_size);



/**

 * v4l2_async_notifier_add_fwnode_remote_subdev - Allocate and add a fwnode

 *						  remote async subdev to the

 *						  notifier's master asd_list.

 *

 * @notif: pointer to &struct v4l2_async_notifier

 * @endpoint: local endpoint pointing to the remote sub-device to be matched

 * @asd: Async sub-device struct allocated by the caller. The &struct

 *	 v4l2_async_subdev shall be the first member of the driver's async

 *	 sub-device struct, i.e. both begin at the same memory address.

 *

 * Gets the remote endpoint of a given local endpoint, set it up for fwnode

 * matching and adds the async sub-device to the notifier's @asd_list. The

 * function also gets a reference of the fwnode which is released later at

 * notifier cleanup time.

 *

 * This is just like @v4l2_async_notifier_add_fwnode_subdev, but with the

 * exception that the fwnode refers to a local endpoint, not the remote one, and

 * the function relies on the caller to allocate the async sub-device struct.

 */

int

v4l2_async_notifier_add_fwnode_remote_subdev(struct v4l2_async_notifier *notif,

					     struct fwnode_handle *endpoint,

					     struct v4l2_async_subdev *asd);



/**

 * v4l2_async_notifier_add_i2c_subdev - Allocate and add an i2c async

 *				subdev to the notifier's master asd_list.