116 		struct media_pad *pad = gobj_to_pad(gobj);  in dev_dbg_obj()  local
121 			pad->flags & MEDIA_PAD_FL_SINK   ? "sink " : "",  in dev_dbg_obj()
122 			pad->flags & MEDIA_PAD_FL_SOURCE ? "source " : "",  in dev_dbg_obj()
123 			pad->entity->name, pad->index);  in dev_dbg_obj()
233  * @pad0: The first pad index
234  * @pad1: The second pad index
238  * and enabling one of the pads means that the other pad will become "locked"
246  * One of @pad0 and @pad1 must be a sink pad and the other one a source pad.
420  * When a new pad is reached, an entry is pushed on the top of the stack and
421  * points to the incoming pad and the first link of the entity.
424  * internal pad dependencies in the entity, and then links in the graph. It
426  * links that originate from a pad that is internally connected to the incoming
427  * pad, as reported by the media_entity_has_pad_interdep() function.
433  * @pad: The media pad being visited
437 	struct media_pad *pad;  member
500 				    struct media_pad *pad)  in media_pipeline_walk_push()  argument
513 	entry->pad = pad;  in media_pipeline_walk_push()
514 	entry->links = pad->entity->links.next;  in media_pipeline_walk_push()
518 		walk->stack.top, pad->entity->name, pad->index);  in media_pipeline_walk_push()
537 	if (entry->links->next == &entry->pad->entity->links) {  in media_pipeline_walk_pop()
561 /* Add a pad to the pipeline and push it to the stack. */
564 				  struct media_pad *pad)  in media_pipeline_add_pad()  argument
569 		if (ppad->pad == pad) {  in media_pipeline_add_pad()
570 			dev_dbg(pad->graph_obj.mdev->dev,  in media_pipeline_add_pad()
571 				"media pipeline: already contains pad '%s':%u\n",  in media_pipeline_add_pad()
572 				pad->entity->name, pad->index);  in media_pipeline_add_pad()
582 	ppad->pad = pad;  in media_pipeline_add_pad()
586 	dev_dbg(pad->graph_obj.mdev->dev,  in media_pipeline_add_pad()
587 		"media pipeline: added pad '%s':%u\n",  in media_pipeline_add_pad()
588 		pad->entity->name, pad->index);  in media_pipeline_add_pad()
590 	return media_pipeline_walk_push(walk, pad);  in media_pipeline_add_pad()
605 	origin = entry->pad;  in media_pipeline_explore_next_link()
620 	/* Get the local pad and remote pad. */  in media_pipeline_explore_next_link()
630 	 * Skip links that originate from a different pad than the incoming pad  in media_pipeline_explore_next_link()
631 	 * that is not connected internally in the entity to the incoming pad.  in media_pipeline_explore_next_link()
642 	 * Add the local pad of the link to the pipeline and push it to the  in media_pipeline_explore_next_link()
649 	/* Similarly, add the remote pad, but only if the link is enabled. */  in media_pipeline_explore_next_link()
677 		 * Skip the origin pad (already handled), pad that have links  in media_pipeline_explore_next_link()
706 				   struct media_pad *pad)  in media_pipeline_populate()  argument
714 	 * from @pad.  in media_pipeline_populate()
717 	pipe->mdev = pad->graph_obj.mdev;  in media_pipeline_populate()
721 	ret = media_pipeline_add_pad(pipe, &walk, pad);  in media_pipeline_populate()
738 	dev_dbg(pad->graph_obj.mdev->dev,  in media_pipeline_populate()
742 		dev_dbg(pad->graph_obj.mdev->dev, "- '%s':%u\n",  in media_pipeline_populate()
743 			ppad->pad->entity->name, ppad->pad->index);  in media_pipeline_populate()
758 __must_check int __media_pipeline_start(struct media_pad *pad,  in __media_pipeline_start()  argument
761 	struct media_device *mdev = pad->graph_obj.mdev;  in __media_pipeline_start()
769 	 * If the pad is already part of a pipeline, that pipeline must be the  in __media_pipeline_start()
772 	if (WARN_ON(pad->pipe && pad->pipe != pipe))  in __media_pipeline_start()
786 	 * with media_pipeline_pad instances for each pad found during graph  in __media_pipeline_start()
789 	ret = media_pipeline_populate(pipe, pad);  in __media_pipeline_start()
799 		struct media_pad *pad = ppad->pad;  in __media_pipeline_start()  local
800 		struct media_entity *entity = pad->entity;  in __media_pipeline_start()
804 		dev_dbg(mdev->dev, "Validating pad '%s':%u\n", pad->entity->name,  in __media_pipeline_start()
805 			pad->index);  in __media_pipeline_start()
808 		 * 1. Ensure that the pad doesn't already belong to a different  in __media_pipeline_start()
811 		if (pad->pipe) {  in __media_pipeline_start()
812 			dev_dbg(mdev->dev, "Failed to start pipeline: pad '%s':%u busy\n",  in __media_pipeline_start()
813 				pad->entity->name, pad->index);  in __media_pipeline_start()
819 		 * 2. Validate all active links whose sink is the current pad.  in __media_pipeline_start()
821 		 * the connected sink pad to avoid duplicating checks.  in __media_pipeline_start()
824 			/* Skip links unrelated to the current pad. */  in __media_pipeline_start()
825 			if (link->sink != pad && link->source != pad)  in __media_pipeline_start()
828 			/* Record if the pad has links and enabled links. */  in __media_pipeline_start()
834 			 * current pad as its sink.  in __media_pipeline_start()
839 			if (link->sink != pad)  in __media_pipeline_start()
865 		 * 3. If the pad has the MEDIA_PAD_FL_MUST_CONNECT flag set,  in __media_pipeline_start()
868 		if ((pad->flags & MEDIA_PAD_FL_MUST_CONNECT) &&  in __media_pipeline_start()
871 				"Pad '%s':%u must be connected by an enabled link\n",  in __media_pipeline_start()
872 				pad->entity->name, pad->index);  in __media_pipeline_start()
877 		/* Validation passed, store the pipe pointer in the pad. */  in __media_pipeline_start()
878 		pad->pipe = pipe;  in __media_pipeline_start()
895 		err_ppad->pad->pipe = NULL;  in __media_pipeline_start()
904 __must_check int media_pipeline_start(struct media_pad *pad,  in media_pipeline_start()  argument
907 	struct media_device *mdev = pad->graph_obj.mdev;  in media_pipeline_start()
911 	ret = __media_pipeline_start(pad, pipe);  in media_pipeline_start()
917 void __media_pipeline_stop(struct media_pad *pad)  in __media_pipeline_stop()  argument
919 	struct media_pipeline *pipe = pad->pipe;  in __media_pipeline_stop()
933 		ppad->pad->pipe = NULL;  in __media_pipeline_stop()
942 void media_pipeline_stop(struct media_pad *pad)  in media_pipeline_stop()  argument
944 	struct media_device *mdev = pad->graph_obj.mdev;  in media_pipeline_stop()
947 	__media_pipeline_stop(pad);  in media_pipeline_stop()
952 __must_check int media_pipeline_alloc_start(struct media_pad *pad)  in media_pipeline_alloc_start()  argument
954 	struct media_device *mdev = pad->graph_obj.mdev;  in media_pipeline_alloc_start()
962 	 * Is the pad already part of a pipeline? If not, we need to allocate  in media_pipeline_alloc_start()
965 	pipe = media_pad_pipeline(pad);  in media_pipeline_alloc_start()
977 	ret = __media_pipeline_start(pad, pipe);  in media_pipeline_alloc_start()
991 			       struct media_pad *pad)  in __media_pipeline_pad_iter_next()  argument
993 	if (!pad)  in __media_pipeline_pad_iter_next()
999 	pad = list_entry(iter->cursor, struct media_pipeline_pad, list)->pad;  in __media_pipeline_pad_iter_next()
1002 	return pad;  in __media_pipeline_pad_iter_next()
1032 		entity = ppad->pad->entity;  in __media_pipeline_entity_iter_next()
1373 struct media_pad *media_pad_remote_pad_first(const struct media_pad *pad)  in media_pad_remote_pad_first()  argument
1377 	for_each_media_entity_data_link(pad->entity, link) {  in media_pad_remote_pad_first()
1381 		if (link->source == pad)  in media_pad_remote_pad_first()
1384 		if (link->sink == pad)  in media_pad_remote_pad_first()
1397 	struct media_pad *pad = NULL;  in media_entity_remote_pad_unique()  local
1418 			if (pad)  in media_entity_remote_pad_unique()
1421 			pad = remote_pad;  in media_entity_remote_pad_unique()
1425 	if (!pad)  in media_entity_remote_pad_unique()
1428 	return pad;  in media_entity_remote_pad_unique()
1432 struct media_pad *media_pad_remote_pad_unique(const struct media_pad *pad)  in media_pad_remote_pad_unique()  argument
1437 	list_for_each_entry(link, &pad->entity->links, list) {  in media_pad_remote_pad_unique()
1443 		if (link->sink == pad)  in media_pad_remote_pad_unique()
1445 		else if (link->source == pad)  in media_pad_remote_pad_unique()
1500 	struct media_pad *pad;  in media_entity_pipeline()  local
1502 	media_entity_for_each_pad(entity, pad) {  in media_entity_pipeline()
1503 		if (pad->pipe)  in media_entity_pipeline()
1504 			return pad->pipe;  in media_entity_pipeline()
1511 struct media_pipeline *media_pad_pipeline(struct media_pad *pad)  in media_pad_pipeline()  argument
1513 	return pad->pipe;  in media_pad_pipeline()