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
162  *		a pad. In that case, it represents the source pad.
168  *		a pad. In that case, it represents the sink pad.
171  * @reverse:	Pointer to the link for the reverse direction of a pad to pad
195  * enum media_pad_signal_type - type of the signal inside a media pad
199  *	uniquely identified by the pad number.
201  *	The pad contains an analog signal. It can be Radio Frequency,
223  * struct media_pad - A media pad graph object.
226  * @entity:	Entity this pad belongs to
227  * @index:	Pad index in the entity pads array, numbered from 0 to n
228  * @num_links:	Number of links connected to this pad
229  * @sig_type:	Type of the signal inside a media pad
230  * @flags:	Pad flags, as defined in
233  * @pipe:	Pipeline this pad belongs to. Use media_entity_pipeline() to
253  * @get_fwnode_pad:	Return the pad number based on a fwnode endpoint or
255  *			to map a fwnode to a media pad number. Optional.
265  *			means that the other pad will become "locked" and
379  * @iter: The iterator pad
677  * function calls are used. However, if the object (entity, link, pad,
714  * Drivers must set the direction of every pad in the pads array before calling
739  * media_get_pad_index() - retrieves a pad index from an entity
742  * @pad_type:	the type of the pad, one of MEDIA_PAD_FL_* pad types
743  * @sig_type:	type of signal of the pad to be search
745  * This helper function finds the first pad index inside an entity that
750  * On success, return the pad number. If the pad was not found or the media
759  * @source:	pointer to &media_entity of the source pad.
760  * @source_pad:	number of the source pad in the pads array
761  * @sink:	pointer to &media_entity of the sink pad.
762  * @sink_pad:	number of the sink pad in the pads array.
771  *   When two or more links target a sink pad, only one of them can be
794  * @source: pointer to &media_entity of the source pad. If NULL, it will use
796  * @source_pad: number of the source pad in the pads array
798  * @sink: pointer to &media_entity of the sink pad. If NULL, it will use
800  * @sink_pad: number of the sink pad in the pads array.
897  * enabled link at a sink pad prevents another link at the same pad from
904  *    on media_create_pad_link(), for pad to pad links or the same as described
911  * @source: Source pad
912  * @sink: Sink pad
921  * media_pad_remote_pad_first - Find the first pad at the remote end of a link
922  * @pad: Pad at the local end of the link
924  * Search for a remote pad connected to the given pad by iterating over all
925  * links originating or terminating at that pad until an enabled link is found.
927  * Return: returns a pointer to the pad at the remote end of the first found
930 struct media_pad *media_pad_remote_pad_first(const struct media_pad *pad);
933  * media_pad_remote_pad_unique - Find a remote pad connected to a pad
934  * @pad: The pad
936  * Search for and return a remote pad connected to @pad through an enabled
940  * that support a single active source at a time on a given pad.
942  * Return: A pointer to the remote pad, or one of the following error pointers
946  * * -ENOLINK - No connected pad found
948 struct media_pad *media_pad_remote_pad_unique(const struct media_pad *pad);
951  * media_entity_remote_pad_unique - Find a remote pad connected to an entity
953  * @type: The type of pad to find (MEDIA_PAD_FL_SINK or MEDIA_PAD_FL_SOURCE)
955  * Search for and return a remote pad of @type connected to @entity through an
962  * Return: A pointer to the remote pad, or one of the following error pointers
966  * * -ENOLINK - No connected pad found
973  * media_entity_remote_source_pad_unique - Find a remote source pad connected to
977  * Search for and return a remote source pad connected to @entity through an
984  * Return: A pointer to the remote pad, or one of the following error pointers
988  * * -ENOLINK - No connected pad found
997  * media_pad_is_streaming - Test if a pad is part of a streaming pipeline
998  * @pad: The pad
1000  * Return: True if the pad is part of a pipeline started with the
1003 static inline bool media_pad_is_streaming(const struct media_pad *pad)  in media_pad_is_streaming()  argument
1005 	return pad->pipe;  in media_pad_is_streaming()
1017 	struct media_pad *pad;  in media_entity_is_streaming()  local
1019 	media_entity_for_each_pad(entity, pad) {  in media_entity_is_streaming()
1020 		if (media_pad_is_streaming(pad))  in media_entity_is_streaming()
1038  * multiple streams (either on different pads, or on the same pad using
1048  * media_pad_pipeline - Get the media pipeline a pad is part of
1049  * @pad: The pad
1051  * This function returns the media pipeline that a pad has been associated
1055  * Return: The media_pipeline the pad is part of, or NULL if the pad is
1058 struct media_pipeline *media_pad_pipeline(struct media_pad *pad);
1061  * media_entity_get_fwnode_pad - Get pad number from fwnode
1064  * @fwnode: Pointer to the fwnode_handle which should be used to find the pad
1065  * @direction_flags: Expected direction of the pad, as defined in
1069  * This function can be used to resolve the media pad number from
1074  * then this function searches the entity for the first pad that
1077  * Return: returns the pad number on success or a negative error code.
1146  * @pad: Starting pad
1149  * Mark all pads connected to a given pad through enabled links, either
1151  * to every pad in the pipeline and stored in the media_pad pipe field.
1158 __must_check int media_pipeline_start(struct media_pad *pad,
1163  * @pad: Starting pad
1168 __must_check int __media_pipeline_start(struct media_pad *pad,
1173  * @pad: Starting pad
1175  * Mark all pads connected to a given pad through enabled links, either
1183 void media_pipeline_stop(struct media_pad *pad);
1188  * @pad: Starting pad
1192 void __media_pipeline_stop(struct media_pad *pad);
1197 			       struct media_pad *pad);
1203  * @pad: The iterator pad
1209 #define media_pipeline_for_each_pad(pipe, iter, pad)			\  argument
1210 	for (pad = __media_pipeline_pad_iter_next((pipe), iter, NULL);	\
1211 	     pad != NULL;						\
1212 	     pad = __media_pipeline_pad_iter_next((pipe), iter, pad))
1266  * @pad: Starting pad
1270  * the pad is already part of a pipeline, or allocate a new pipeline.
1275 __must_check int media_pipeline_alloc_start(struct media_pad *pad);