Commit 8fe784b9 authored by Steve Longerbeam's avatar Steve Longerbeam Committed by Mauro Carvalho Chehab
Browse files

media: v4l2-subdev: add v4l2_subdev_get_fwnode_pad_1_to_1 



Add a convenience function that can be used as the .get_fwnode_pad
operation for subdevices that map port numbers and pad indexes 1:1.
The function verifies the endpoint is owned by the subdevice, and if
so returns the endpoint port number.

Signed-off-by: default avatarSteve Longerbeam <slongerbeam@gmail.com>
Signed-off-by: default avatarSakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab+huawei@kernel.org>
parent 70d4a9ef

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

+22 −0
Original line number Diff line number Diff line
@@ -749,6 +749,28 @@ const struct v4l2_file_operations v4l2_subdev_fops = { 
};



#ifdef CONFIG_MEDIA_CONTROLLER



int v4l2_subdev_get_fwnode_pad_1_to_1(struct media_entity *entity,

				      struct fwnode_endpoint *endpoint)

{

	struct fwnode_handle *fwnode;

	struct v4l2_subdev *sd;



	if (!is_media_entity_v4l2_subdev(entity))

		return -EINVAL;



	sd = media_entity_to_v4l2_subdev(entity);



	fwnode = fwnode_graph_get_port_parent(endpoint->local_fwnode);

	fwnode_handle_put(fwnode);



	if (dev_fwnode(sd->dev) == fwnode)

		return endpoint->port;



	return -ENXIO;

}

EXPORT_SYMBOL_GPL(v4l2_subdev_get_fwnode_pad_1_to_1);



int v4l2_subdev_link_validate_default(struct v4l2_subdev *sd,

				      struct media_link *link,

				      struct v4l2_subdev_format *source_fmt,

include/media/v4l2-subdev.h

+17 −0
Original line number Diff line number Diff line
@@ -1027,6 +1027,23 @@ static inline void *v4l2_get_subdev_hostdata(const struct v4l2_subdev *sd) 


#ifdef CONFIG_MEDIA_CONTROLLER



/**

 * v4l2_subdev_get_fwnode_pad_1_to_1 - Get pad number from a subdev fwnode

 *                                     endpoint, assuming 1:1 port:pad

 *

 * @entity - Pointer to the subdev entity

 * @endpoint - Pointer to a parsed fwnode endpoint

 *

 * This function can be used as the .get_fwnode_pad operation for

 * subdevices that map port numbers and pad indexes 1:1. If the endpoint

 * is owned by the subdevice, the function returns the endpoint port

 * number.

 *

 * Returns the endpoint port number on success or a negative error code.

 */

int v4l2_subdev_get_fwnode_pad_1_to_1(struct media_entity *entity,

				      struct fwnode_endpoint *endpoint);



/**

 * v4l2_subdev_link_validate_default - validates a media link

 *