diff options
Diffstat (limited to 'include/media/media-entity.h')
| -rw-r--r-- | include/media/media-entity.h | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/include/media/media-entity.h b/include/media/media-entity.h index a9a1c0ec5d1c..4efe2f88e6dc 100644 --- a/include/media/media-entity.h +++ b/include/media/media-entity.h @@ -1140,4 +1140,34 @@ struct media_link * media_create_ancillary_link(struct media_entity *primary, struct media_entity *ancillary); +/** + * __media_entity_next_link() - Iterate through a &media_entity's links + * + * @entity: pointer to the &media_entity + * @link: pointer to a &media_link to hold the iterated values + * @link_type: one of the MEDIA_LNK_FL_LINK_TYPE flags + * + * Return the next link against an entity matching a specific link type. This + * allows iteration through an entity's links whilst guaranteeing all of the + * returned links are of the given type. + */ +struct media_link *__media_entity_next_link(struct media_entity *entity, + struct media_link *link, + unsigned long link_type); + +/** + * for_each_media_entity_data_link() - Iterate through an entity's data links + * + * @entity: pointer to the &media_entity + * @link: pointer to a &media_link to hold the iterated values + * + * Iterate over a &media_entity's data links + */ +#define for_each_media_entity_data_link(entity, link) \ + for (link = __media_entity_next_link(entity, NULL, \ + MEDIA_LNK_FL_DATA_LINK); \ + link; \ + link = __media_entity_next_link(entity, link, \ + MEDIA_LNK_FL_DATA_LINK)) + #endif |