[media] media-entity.h: move kernel-doc tags from media-entity.c
Several additional functions are described at media-entity.c. Moving them to the header file, to make the code cleaner and to have all such macros at the same place. Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>steinar/wifi_calib_4_9_kernel
Mauro Carvalho Chehab
parent
c350ef830f
commit
1fc25d30a4
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@ -26,15 +26,6 @@
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#include <media/media-entity.h>
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#include <media/media-device.h>
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/**
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* dev_dbg_obj - Prints in debug mode a change on some object
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*
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* @event_name: Name of the event to report. Could be __func__
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* @gobj: Pointer to the object
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*
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* Enabled only if DEBUG or CONFIG_DYNAMIC_DEBUG. Otherwise, it
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* won't produce any code.
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*/
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static inline const char *gobj_type(enum media_gobj_type type)
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{
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switch (type) {
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@ -79,6 +70,15 @@ static inline const char *intf_type(struct media_interface *intf)
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}
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};
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/**
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* dev_dbg_obj - Prints in debug mode a change on some object
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*
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* @event_name: Name of the event to report. Could be __func__
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* @gobj: Pointer to the object
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*
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* Enabled only if DEBUG or CONFIG_DYNAMIC_DEBUG. Otherwise, it
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* won't produce any code.
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*/
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static void dev_dbg_obj(const char *event_name, struct media_gobj *gobj)
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{
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#if defined(DEBUG) || defined (CONFIG_DYNAMIC_DEBUG)
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@ -133,19 +133,6 @@ static void dev_dbg_obj(const char *event_name, struct media_gobj *gobj)
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#endif
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}
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/**
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* media_gobj_create - Initialize a graph object
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*
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* @mdev: Pointer to the media_device that contains the object
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* @type: Type of the object
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* @gobj: Pointer to the object
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*
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* This routine initializes the embedded struct media_gobj inside a
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* media graph object. It is called automatically if media_*_create()
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* calls are used. However, if the object (entity, link, pad, interface)
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* is embedded on some other object, this function should be called before
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* registering the object at the media controller.
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*/
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void media_gobj_create(struct media_device *mdev,
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enum media_gobj_type type,
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struct media_gobj *gobj)
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@ -179,13 +166,6 @@ void media_gobj_create(struct media_device *mdev,
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dev_dbg_obj(__func__, gobj);
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}
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/**
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* media_gobj_destroy - Stop using a graph object on a media device
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*
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* @graph_obj: Pointer to the object
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*
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* This should be called at media_device_unregister_*() routines
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*/
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void media_gobj_destroy(struct media_gobj *gobj)
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{
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dev_dbg_obj(__func__, gobj);
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@ -196,31 +176,8 @@ void media_gobj_destroy(struct media_gobj *gobj)
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list_del(&gobj->list);
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}
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/**
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* media_entity_pads_init - Initialize a media entity
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*
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* @num_pads: Total number of sink and source pads.
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* @pads: Array of 'num_pads' pads.
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*
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* The total number of pads is an intrinsic property of entities known by the
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* entity driver, while the total number of links depends on hardware design
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* and is an extrinsic property unknown to the entity driver. However, in most
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* use cases the number of links can safely be assumed to be equal to or
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* larger than the number of pads.
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*
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* For those reasons the links array can be preallocated based on the number
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* of pads and will be reallocated later if extra links need to be created.
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*
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* This function allocates a links array with enough space to hold at least
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* 'num_pads' elements. The media_entity::max_links field will be set to the
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* number of allocated elements.
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*
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* The pads array is managed by the entity driver and passed to
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* media_entity_pads_init() where its pointer will be stored in the entity structure.
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*/
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int
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media_entity_pads_init(struct media_entity *entity, u16 num_pads,
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struct media_pad *pads)
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int media_entity_pads_init(struct media_entity *entity, u16 num_pads,
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struct media_pad *pads)
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{
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struct media_device *mdev = entity->graph_obj.mdev;
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unsigned int i;
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@ -285,16 +242,6 @@ static struct media_entity *stack_pop(struct media_entity_graph *graph)
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#define link_top(en) ((en)->stack[(en)->top].link)
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#define stack_top(en) ((en)->stack[(en)->top].entity)
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/**
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* media_entity_graph_walk_start - Start walking the media graph at a given entity
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* @graph: Media graph structure that will be used to walk the graph
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* @entity: Starting entity
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*
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* This function initializes the graph traversal structure to walk the entities
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* graph starting at the given entity. The traversal structure must not be
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* modified by the caller during graph traversal. When done the structure can
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* safely be freed.
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*/
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void media_entity_graph_walk_start(struct media_entity_graph *graph,
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struct media_entity *entity)
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{
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@ -310,18 +257,6 @@ void media_entity_graph_walk_start(struct media_entity_graph *graph,
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}
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EXPORT_SYMBOL_GPL(media_entity_graph_walk_start);
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/**
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* media_entity_graph_walk_next - Get the next entity in the graph
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* @graph: Media graph structure
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*
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* Perform a depth-first traversal of the given media entities graph.
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*
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* The graph structure must have been previously initialized with a call to
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* media_entity_graph_walk_start().
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*
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* Return the next entity in the graph or NULL if the whole graph have been
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* traversed.
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*/
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struct media_entity *
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media_entity_graph_walk_next(struct media_entity_graph *graph)
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{
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@ -370,20 +305,6 @@ EXPORT_SYMBOL_GPL(media_entity_graph_walk_next);
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* Pipeline management
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*/
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/**
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* media_entity_pipeline_start - Mark a pipeline as streaming
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* @entity: Starting entity
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* @pipe: Media pipeline to be assigned to all entities in the pipeline.
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*
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* Mark all entities connected to a given entity through enabled links, either
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* directly or indirectly, as streaming. The given pipeline object is assigned to
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* every entity in the pipeline and stored in the media_entity pipe field.
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*
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* Calls to this function can be nested, in which case the same number of
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* media_entity_pipeline_stop() calls will be required to stop streaming. The
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* pipeline pointer must be identical for all nested calls to
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* media_entity_pipeline_start().
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*/
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__must_check int media_entity_pipeline_start(struct media_entity *entity,
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struct media_pipeline *pipe)
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{
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@ -494,18 +415,6 @@ error:
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}
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EXPORT_SYMBOL_GPL(media_entity_pipeline_start);
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/**
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* media_entity_pipeline_stop - Mark a pipeline as not streaming
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* @entity: Starting entity
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*
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* Mark all entities connected to a given entity through enabled links, either
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* directly or indirectly, as not streaming. The media_entity pipe field is
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* reset to NULL.
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*
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* If multiple calls to media_entity_pipeline_start() have been made, the same
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* number of calls to this function are required to mark the pipeline as not
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* streaming.
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*/
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void media_entity_pipeline_stop(struct media_entity *entity)
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{
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struct media_device *mdev = entity->graph_obj.mdev;
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@ -529,16 +438,6 @@ EXPORT_SYMBOL_GPL(media_entity_pipeline_stop);
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* Module use count
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*/
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/*
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* media_entity_get - Get a reference to the parent module
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* @entity: The entity
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*
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* Get a reference to the parent media device module.
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*
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* The function will return immediately if @entity is NULL.
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*
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* Return a pointer to the entity on success or NULL on failure.
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*/
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struct media_entity *media_entity_get(struct media_entity *entity)
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{
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if (entity == NULL)
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@ -552,14 +451,6 @@ struct media_entity *media_entity_get(struct media_entity *entity)
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}
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EXPORT_SYMBOL_GPL(media_entity_get);
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/*
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* media_entity_put - Release the reference to the parent module
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* @entity: The entity
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*
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* Release the reference count acquired by media_entity_get().
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*
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* The function will return immediately if @entity is NULL.
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*/
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void media_entity_put(struct media_entity *entity)
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{
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if (entity == NULL)
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@ -718,20 +609,6 @@ static int __media_entity_setup_link_notify(struct media_link *link, u32 flags)
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return 0;
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}
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/**
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* __media_entity_setup_link - Configure a media link
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* @link: The link being configured
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* @flags: Link configuration flags
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*
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* The bulk of link setup is handled by the two entities connected through the
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* link. This function notifies both entities of the link configuration change.
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*
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* If the link is immutable or if the current and new configuration are
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* identical, return immediately.
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*
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* The user is expected to hold link->source->parent->mutex. If not,
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* media_entity_setup_link() should be used instead.
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*/
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int __media_entity_setup_link(struct media_link *link, u32 flags)
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{
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const u32 mask = MEDIA_LNK_FL_ENABLED;
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@ -788,14 +665,6 @@ int media_entity_setup_link(struct media_link *link, u32 flags)
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}
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EXPORT_SYMBOL_GPL(media_entity_setup_link);
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/**
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* media_entity_find_link - Find a link between two pads
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* @source: Source pad
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* @sink: Sink pad
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*
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* Return a pointer to the link between the two entities. If no such link
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* exists, return NULL.
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*/
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struct media_link *
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media_entity_find_link(struct media_pad *source, struct media_pad *sink)
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{
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@ -813,16 +682,6 @@ media_entity_find_link(struct media_pad *source, struct media_pad *sink)
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}
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EXPORT_SYMBOL_GPL(media_entity_find_link);
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/**
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* media_entity_remote_pad - Find the pad at the remote end of a link
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* @pad: Pad at the local end of the link
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*
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* Search for a remote pad connected to the given pad by iterating over all
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* links originating or terminating at that pad until an enabled link is found.
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*
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* Return a pointer to the pad at the remote end of the first found enabled
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* link, or NULL if no enabled link has been found.
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*/
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struct media_pad *media_entity_remote_pad(struct media_pad *pad)
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{
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struct media_link *link;
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@ -338,17 +338,43 @@ struct media_entity_graph {
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#define intf_to_devnode(intf) \
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container_of(intf, struct media_intf_devnode, intf)
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/**
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* media_gobj_create - Initialize a graph object
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*
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* @mdev: Pointer to the media_device that contains the object
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* @type: Type of the object
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* @gobj: Pointer to the graph object
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*
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* This routine initializes the embedded struct media_gobj inside a
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* media graph object. It is called automatically if media_*_create()
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* calls are used. However, if the object (entity, link, pad, interface)
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* is embedded on some other object, this function should be called before
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* registering the object at the media controller.
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*/
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void media_gobj_create(struct media_device *mdev,
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enum media_gobj_type type,
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struct media_gobj *gobj);
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/**
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* media_gobj_destroy - Stop using a graph object on a media device
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*
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* @gobj: Pointer to the graph object
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*
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* This should be called by all routines like media_device_unregister()
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* that remove/destroy media graph objects.
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*/
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void media_gobj_destroy(struct media_gobj *gobj);
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/**
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* media_entity_pads_init() - Initialize the entity pads
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*
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* @entity: entity where the pads belong
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* @num_pads: number of pads to be initialized
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* @pads: pads array
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* @num_pads: total number of sink and source pads
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* @pads: Array of @num_pads pads.
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*
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* The pads array is managed by the entity driver and passed to
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* media_entity_pads_init() where its pointer will be stored in the entity
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* structure.
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*
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* If no pads are needed, drivers could either directly fill
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* &media_entity->@num_pads with 0 and &media_entity->@pads with NULL or call
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@ -413,6 +439,20 @@ void __media_entity_remove_links(struct media_entity *entity);
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*/
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void media_entity_remove_links(struct media_entity *entity);
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/**
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* __media_entity_setup_link - Configure a media link without locking
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* @link: The link being configured
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* @flags: Link configuration flags
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*
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* The bulk of link setup is handled by the two entities connected through the
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* link. This function notifies both entities of the link configuration change.
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*
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* If the link is immutable or if the current and new configuration are
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* identical, return immediately.
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*
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* The user is expected to hold link->source->parent->mutex. If not,
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* media_entity_setup_link() should be used instead.
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*/
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int __media_entity_setup_link(struct media_link *link, u32 flags);
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/**
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@ -450,19 +490,111 @@ int __media_entity_setup_link(struct media_link *link, u32 flags);
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* on media_create_intf_link(), for interface to entity links.
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*/
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int media_entity_setup_link(struct media_link *link, u32 flags);
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/**
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* media_entity_find_link - Find a link between two pads
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* @source: Source pad
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* @sink: Sink pad
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*
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* Return a pointer to the link between the two entities. If no such link
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* exists, return NULL.
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*/
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struct media_link *media_entity_find_link(struct media_pad *source,
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struct media_pad *sink);
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/**
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* media_entity_remote_pad - Find the pad at the remote end of a link
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* @pad: Pad at the local end of the link
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*
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* Search for a remote pad connected to the given pad by iterating over all
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* links originating or terminating at that pad until an enabled link is found.
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*
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* Return a pointer to the pad at the remote end of the first found enabled
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* link, or NULL if no enabled link has been found.
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*/
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struct media_pad *media_entity_remote_pad(struct media_pad *pad);
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/**
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* media_entity_get - Get a reference to the parent module
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*
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* @entity: The entity
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*
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* Get a reference to the parent media device module.
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*
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* The function will return immediately if @entity is NULL.
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*
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* Return a pointer to the entity on success or NULL on failure.
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*/
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struct media_entity *media_entity_get(struct media_entity *entity);
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/**
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* media_entity_put - Release the reference to the parent module
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*
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* @entity: The entity
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*
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* Release the reference count acquired by media_entity_get().
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*
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* The function will return immediately if @entity is NULL.
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*/
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void media_entity_put(struct media_entity *entity);
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/**
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* media_entity_graph_walk_start - Start walking the media graph at a given entity
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* @graph: Media graph structure that will be used to walk the graph
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* @entity: Starting entity
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*
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* This function initializes the graph traversal structure to walk the entities
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* graph starting at the given entity. The traversal structure must not be
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* modified by the caller during graph traversal. When done the structure can
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* safely be freed.
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*/
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void media_entity_graph_walk_start(struct media_entity_graph *graph,
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struct media_entity *entity);
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/**
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* media_entity_graph_walk_next - Get the next entity in the graph
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* @graph: Media graph structure
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*
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* Perform a depth-first traversal of the given media entities graph.
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*
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* The graph structure must have been previously initialized with a call to
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* media_entity_graph_walk_start().
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*
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* Return the next entity in the graph or NULL if the whole graph have been
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* traversed.
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*/
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struct media_entity *
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media_entity_graph_walk_next(struct media_entity_graph *graph);
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/**
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* media_entity_pipeline_start - Mark a pipeline as streaming
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* @entity: Starting entity
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* @pipe: Media pipeline to be assigned to all entities in the pipeline.
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*
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* Mark all entities connected to a given entity through enabled links, either
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* directly or indirectly, as streaming. The given pipeline object is assigned to
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* every entity in the pipeline and stored in the media_entity pipe field.
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*
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* Calls to this function can be nested, in which case the same number of
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* media_entity_pipeline_stop() calls will be required to stop streaming. The
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* pipeline pointer must be identical for all nested calls to
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* media_entity_pipeline_start().
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*/
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__must_check int media_entity_pipeline_start(struct media_entity *entity,
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struct media_pipeline *pipe);
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/**
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* media_entity_pipeline_stop - Mark a pipeline as not streaming
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* @entity: Starting entity
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*
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* Mark all entities connected to a given entity through enabled links, either
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* directly or indirectly, as not streaming. The media_entity pipe field is
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* reset to NULL.
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*
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* If multiple calls to media_entity_pipeline_start() have been made, the same
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* number of calls to this function are required to mark the pipeline as not
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* streaming.
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*/
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void media_entity_pipeline_stop(struct media_entity *entity);
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/**
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