From: Laurent Pinchart <[email protected]> This is a wrapper around the media entity has_route operation.
Signed-off-by: Laurent Pinchart <[email protected]> Signed-off-by: Michal Simek <[email protected]> Signed-off-by: Sakari Ailus <[email protected]> Signed-off-by: Jacopo Mondi <[email protected]> --- drivers/media/media-entity.c | 19 +++++++++++++++++++ include/media/media-entity.h | 17 +++++++++++++++++ 2 files changed, 36 insertions(+) diff --git a/drivers/media/media-entity.c b/drivers/media/media-entity.c index 6f5196d05894..8e0ca8b1cfa2 100644 --- a/drivers/media/media-entity.c +++ b/drivers/media/media-entity.c @@ -238,6 +238,25 @@ EXPORT_SYMBOL_GPL(media_entity_pads_init); * Graph traversal */ +bool media_entity_has_route(struct media_entity *entity, unsigned int pad0, + unsigned int pad1) +{ + if (pad0 >= entity->num_pads || pad1 >= entity->num_pads) + return false; + + if (pad0 == pad1) + return true; + + if (!entity->ops || !entity->ops->has_route) + return true; + + if (entity->pads[pad1].index < entity->pads[pad0].index) + swap(pad0, pad1); + + return entity->ops->has_route(entity, pad0, pad1); +} +EXPORT_SYMBOL_GPL(media_entity_has_route); + static struct media_pad * media_pad_other(struct media_pad *pad, struct media_link *link) { diff --git a/include/media/media-entity.h b/include/media/media-entity.h index 675bc27b8b3c..205561545d7e 100644 --- a/include/media/media-entity.h +++ b/include/media/media-entity.h @@ -919,6 +919,23 @@ int media_entity_get_fwnode_pad(struct media_entity *entity, __must_check int media_graph_walk_init( struct media_graph *graph, struct media_device *mdev); +/** + * media_entity_has_route - Check if two entity pads are connected internally + * + * @entity: The entity + * @pad0: The first pad index + * @pad1: The second pad index + * + * This function can be used to check whether two pads of an entity are + * connected internally in the entity. + * + * The caller must hold entity->graph_obj.mdev->mutex. + * + * Return: true if the pads are connected internally and false otherwise. + */ +bool media_entity_has_route(struct media_entity *entity, unsigned int pad0, + unsigned int pad1); + /** * media_graph_walk_cleanup - Release resources used by graph walk. * -- 2.20.1
