diff options
Diffstat (limited to 'drivers/media/media-entity.c')
| -rw-r--r-- | drivers/media/media-entity.c | 43 |
1 files changed, 42 insertions, 1 deletions
diff --git a/drivers/media/media-entity.c b/drivers/media/media-entity.c index bc44193efa47..dd0f0ead9516 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 */ @@ -530,8 +566,13 @@ void __media_pipeline_stop(struct media_entity *entity) struct media_graph *graph = &entity->pipe->graph; struct media_pipeline *pipe = entity->pipe; + /* + * If the following check fails, the driver has performed an + * unbalanced call to media_pipeline_stop() + */ + if (WARN_ON(!pipe)) + return; - WARN_ON(!pipe->streaming_count); media_graph_walk_start(graph, entity); while ((entity = media_graph_walk_next(graph))) { |