diff options
| -rw-r--r-- | drivers/media/media-entity.c | 36 | ||||
| -rw-r--r-- | include/media/media-entity.h | 23 |
2 files changed, 59 insertions, 0 deletions
diff --git a/drivers/media/media-entity.c b/drivers/media/media-entity.c index bc44193efa47..82d6755bd5d0 100644 --- a/drivers/media/media-entity.c +++ b/drivers/media/media-entity.c @@ -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 */ diff --git a/include/media/media-entity.h b/include/media/media-entity.h index 46eeb036aa33..754182d29668 100644 --- a/include/media/media-entity.h +++ b/include/media/media-entity.h @@ -821,6 +821,29 @@ 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. * * @graph: Media graph structure that will be used to walk the graph |