29  * @MEDIA_GRAPH_PAD:		Identify a media pad
116  * struct media_pipeline_pad - A pad part of a media pipeline
119  * @pipe:		The media_pipeline that the pad is part of
120  * @pad:		The media pad
122  * This structure associate a pad with a media pipeline. Instances of
130 	struct media_pad *pad;  member
142  *		a pad. In that case, it represents the source pad.
148  *		a pad. In that case, it represents the sink pad.
151  * @reverse:	Pointer to the link for the reverse direction of a pad to pad
175  * enum media_pad_signal_type - type of the signal inside a media pad
179  *	uniquely identified by the pad number.
181  *	The pad contains an analog signal. It can be Radio Frequency,
203  * struct media_pad - A media pad graph object.
206  * @entity:	Entity this pad belongs to
207  * @index:	Pad index in the entity pads array, numbered from 0 to n
208  * @sig_type:	Type of the signal inside a media pad
209  * @flags:	Pad flags, as defined in
212  * @pipe:	Pipeline this pad belongs to. Use media_entity_pipeline() to
231  * @get_fwnode_pad:	Return the pad number based on a fwnode endpoint or
233  *			to map a fwnode to a media pad number. Optional.
243  *			means that the other pad will become "locked" and
359  * @iter: The iterator pad
657  * function calls are used. However, if the object (entity, link, pad,
694  * Drivers must set the direction of every pad in the pads array before calling
719  * media_get_pad_index() - retrieves a pad index from an entity
722  * @is_sink:	true if the pad is a sink, false if it is a source
723  * @sig_type:	type of signal of the pad to be search
725  * This helper function finds the first pad index inside an entity that
730  * On success, return the pad number. If the pad was not found or the media
739  * @source:	pointer to &media_entity of the source pad.
740  * @source_pad:	number of the source pad in the pads array
741  * @sink:	pointer to &media_entity of the sink pad.
742  * @sink_pad:	number of the sink pad in the pads array.
751  *   When two or more links target a sink pad, only one of them can be
774  * @source: pointer to &media_entity of the source pad. If NULL, it will use
776  * @source_pad: number of the source pad in the pads array
778  * @sink: pointer to &media_entity of the sink pad. If NULL, it will use
780  * @sink_pad: number of the sink pad in the pads array.
877  * enabled link at a sink pad prevents another link at the same pad from
884  *    on media_create_pad_link(), for pad to pad links or the same as described
891  * @source: Source pad
892  * @sink: Sink pad
901  * media_pad_remote_pad_first - Find the first pad at the remote end of a link
902  * @pad: Pad at the local end of the link
904  * Search for a remote pad connected to the given pad by iterating over all
905  * links originating or terminating at that pad until an enabled link is found.
907  * Return: returns a pointer to the pad at the remote end of the first found
910 struct media_pad *media_pad_remote_pad_first(const struct media_pad *pad);
913  * media_pad_remote_pad_unique - Find a remote pad connected to a pad
914  * @pad: The pad
916  * Search for and return a remote pad connected to @pad through an enabled
920  * that support a single active source at a time on a given pad.
922  * Return: A pointer to the remote pad, or one of the following error pointers
926  * * -ENOLINK - No connected pad found
928 struct media_pad *media_pad_remote_pad_unique(const struct media_pad *pad);
931  * media_entity_remote_pad_unique - Find a remote pad connected to an entity
933  * @type: The type of pad to find (MEDIA_PAD_FL_SINK or MEDIA_PAD_FL_SOURCE)
935  * Search for and return a remote pad of @type connected to @entity through an
942  * Return: A pointer to the remote pad, or one of the following error pointers
946  * * -ENOLINK - No connected pad found
953  * media_entity_remote_source_pad_unique - Find a remote source pad connected to
957  * Search for and return a remote source pad connected to @entity through an
964  * Return: A pointer to the remote pad, or one of the following error pointers
968  * * -ENOLINK - No connected pad found
977  * media_pad_is_streaming - Test if a pad is part of a streaming pipeline
978  * @pad: The pad
980  * Return: True if the pad is part of a pipeline started with the
983 static inline bool media_pad_is_streaming(const struct media_pad *pad)  in media_pad_is_streaming()  argument
985 	return pad->pipe;  in media_pad_is_streaming()
997 	struct media_pad *pad;  in media_entity_is_streaming()  local
999 	media_entity_for_each_pad(entity, pad) {  in media_entity_is_streaming()
1000 		if (media_pad_is_streaming(pad))  in media_entity_is_streaming()
1018  * multiple streams (either on different pads, or on the same pad using
1028  * media_pad_pipeline - Get the media pipeline a pad is part of
1029  * @pad: The pad
1031  * This function returns the media pipeline that a pad has been associated
1035  * Return: The media_pipeline the pad is part of, or NULL if the pad is
1038 struct media_pipeline *media_pad_pipeline(struct media_pad *pad);
1041  * media_entity_get_fwnode_pad - Get pad number from fwnode
1044  * @fwnode: Pointer to the fwnode_handle which should be used to find the pad
1045  * @direction_flags: Expected direction of the pad, as defined in
1049  * This function can be used to resolve the media pad number from
1054  * then this function searches the entity for the first pad that
1057  * Return: returns the pad number on success or a negative error code.
1118  * @pad: Starting pad
1121  * Mark all pads connected to a given pad through enabled links, either
1123  * to every pad in the pipeline and stored in the media_pad pipe field.
1130 __must_check int media_pipeline_start(struct media_pad *pad,
1135  * @pad: Starting pad
1140 __must_check int __media_pipeline_start(struct media_pad *pad,
1145  * @pad: Starting pad
1155 void media_pipeline_stop(struct media_pad *pad);
1160  * @pad: Starting pad
1164 void __media_pipeline_stop(struct media_pad *pad);
1168  * @pad: Starting pad
1172  * the pad is already part of a pipeline, or allocate a new pipeline.
1177 __must_check int media_pipeline_alloc_start(struct media_pad *pad);