Commit d295c6a4 authored by Niklas Söderlund's avatar Niklas Söderlund Committed by Mauro Carvalho Chehab
Browse files

[media] media: entity: Add media_entity_get_fwnode_pad() function 



This is a wrapper around the media entity get_fwnode_pad operation.

Signed-off-by: default avatarNiklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Acked-by: default avatarSakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: default avatarHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@s-opensource.com>
parent ae45cd5e

drivers/media/media-entity.c

+36 −0
Original line number Diff line number Diff line
@@ -18,6 +18,7 @@ 


#include <linux/bitmap.h>

#include <linux/module.h>

#include <linux/property.h>

#include <linux/slab.h>

#include <media/media-entity.h>

#include <media/media-device.h>
@@ -386,6 +387,41 @@ struct media_entity *media_graph_walk_next(struct media_graph *graph) 
}

EXPORT_SYMBOL_GPL(media_graph_walk_next);



int media_entity_get_fwnode_pad(struct media_entity *entity,

				struct fwnode_handle *fwnode,

				unsigned long direction_flags)

{

	struct fwnode_endpoint endpoint;

	unsigned int i;

	int ret;



	if (!entity->ops || !entity->ops->get_fwnode_pad) {

		for (i = 0; i < entity->num_pads; i++) {

			if (entity->pads[i].flags & direction_flags)

				return i;

		}



		return -ENXIO;

	}



	ret = fwnode_graph_parse_endpoint(fwnode, &endpoint);

	if (ret)

		return ret;



	ret = entity->ops->get_fwnode_pad(&endpoint);

	if (ret < 0)

		return ret;



	if (ret >= entity->num_pads)

		return -ENXIO;



	if (!(entity->pads[ret].flags & direction_flags))

		return -ENXIO;



	return ret;

}

EXPORT_SYMBOL_GPL(media_entity_get_fwnode_pad);



/* -----------------------------------------------------------------------------

 * Pipeline management

 */

include/media/media-entity.h

+23 −0
Original line number Diff line number Diff line
@@ -820,6 +820,29 @@ struct media_pad *media_entity_remote_pad(struct media_pad *pad); 
 */

struct media_entity *media_entity_get(struct media_entity *entity);



/**

 * media_entity_get_fwnode_pad - Get pad number from fwnode

 *

 * @entity: The entity

 * @fwnode: Pointer to the fwnode_handle which should be used to find the pad

 * @direction_flags: Expected direction of the pad, as defined in

 *		     :ref:`include/uapi/linux/media.h <media_header>`

 *		     (seek for ``MEDIA_PAD_FL_*``)

 *

 * This function can be used to resolve the media pad number from

 * a fwnode. This is useful for devices which use more complex

 * mappings of media pads.

 *

 * If the entity dose not implement the get_fwnode_pad() operation

 * then this function searches the entity for the first pad that

 * matches the @direction_flags.

 *

 * Return: returns the pad number on success or a negative error code.

 */

int media_entity_get_fwnode_pad(struct media_entity *entity,

				struct fwnode_handle *fwnode,

				unsigned long direction_flags);



/**

 * media_graph_walk_init - Allocate resources used by graph walk.

 *