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()
232  * and enabling one of the pads means that the other pad will become "locked"
407  * When a new pad is reached, an entry is pushed on the top of the stack and
408  * points to the incoming pad and the first link of the entity.
411  * internal pad dependencies in the entity, and then links in the graph. It
413  * links that originate from a pad that is internally connected to the incoming
414  * pad, as reported by the media_entity_has_pad_interdep() function.
420  * @pad: The media pad being visited
424 	struct media_pad *pad;  member
487 				    struct media_pad *pad)  in media_pipeline_walk_push()  argument
500 	entry->pad = pad;  in media_pipeline_walk_push()
501 	entry->links = pad->entity->links.next;  in media_pipeline_walk_push()
505 		walk->stack.top, pad->entity->name, pad->index);  in media_pipeline_walk_push()
523 	if (entry->links->next == &entry->pad->entity->links) {  in media_pipeline_walk_pop()
545 /* Add a pad to the pipeline and push it to the stack. */
548 				  struct media_pad *pad)  in media_pipeline_add_pad()  argument
553 		if (ppad->pad == pad) {  in media_pipeline_add_pad()
554 			dev_dbg(pad->graph_obj.mdev->dev,  in media_pipeline_add_pad()
555 				"media pipeline: already contains pad '%s':%u\n",  in media_pipeline_add_pad()
556 				pad->entity->name, pad->index);  in media_pipeline_add_pad()
566 	ppad->pad = pad;  in media_pipeline_add_pad()
570 	dev_dbg(pad->graph_obj.mdev->dev,  in media_pipeline_add_pad()
571 		"media pipeline: added pad '%s':%u\n",  in media_pipeline_add_pad()
572 		pad->entity->name, pad->index);  in media_pipeline_add_pad()
574 	return media_pipeline_walk_push(walk, pad);  in media_pipeline_add_pad()
582 	struct media_pad *pad;  in media_pipeline_explore_next_link()  local
588 	pad = entry->pad;  in media_pipeline_explore_next_link()
604 	/* Get the local pad and remote pad. */  in media_pipeline_explore_next_link()
605 	if (link->source->entity == pad->entity) {  in media_pipeline_explore_next_link()
614 	 * Skip links that originate from a different pad than the incoming pad  in media_pipeline_explore_next_link()
615 	 * that is not connected internally in the entity to the incoming pad.  in media_pipeline_explore_next_link()
617 	if (pad != local &&  in media_pipeline_explore_next_link()
618 	    !media_entity_has_pad_interdep(pad->entity, pad->index, local->index)) {  in media_pipeline_explore_next_link()
651 				   struct media_pad *pad)  in media_pipeline_populate()  argument
659 	 * from @pad.  in media_pipeline_populate()
662 	pipe->mdev = pad->graph_obj.mdev;  in media_pipeline_populate()
666 	ret = media_pipeline_add_pad(pipe, &walk, pad);  in media_pipeline_populate()
683 	dev_dbg(pad->graph_obj.mdev->dev,  in media_pipeline_populate()
687 		dev_dbg(pad->graph_obj.mdev->dev, "- '%s':%u\n",  in media_pipeline_populate()
688 			ppad->pad->entity->name, ppad->pad->index);  in media_pipeline_populate()
703 __must_check int __media_pipeline_start(struct media_pad *pad,  in __media_pipeline_start()  argument
706 	struct media_device *mdev = pad->entity->graph_obj.mdev;  in __media_pipeline_start()
717 	if (WARN_ON(pad->pipe && pad->pipe != pipe))  in __media_pipeline_start()
731 	 * with media_pipeline_pad instances for each pad found during graph  in __media_pipeline_start()
734 	ret = media_pipeline_populate(pipe, pad);  in __media_pipeline_start()
744 		struct media_pad *pad = ppad->pad;  in __media_pipeline_start()  local
745 		struct media_entity *entity = pad->entity;  in __media_pipeline_start()
750 		dev_dbg(mdev->dev, "Validating pad '%s':%u\n", pad->entity->name,  in __media_pipeline_start()
751 			pad->index);  in __media_pipeline_start()
754 		 * 1. Ensure that the pad doesn't already belong to a different  in __media_pipeline_start()
757 		if (pad->pipe) {  in __media_pipeline_start()
758 			dev_dbg(mdev->dev, "Failed to start pipeline: pad '%s':%u busy\n",  in __media_pipeline_start()
759 				pad->entity->name, pad->index);  in __media_pipeline_start()
765 		 * 2. Validate all active links whose sink is the current pad.  in __media_pipeline_start()
767 		 * the connected sink pad to avoid duplicating checks.  in __media_pipeline_start()
770 			/* Skip links unrelated to the current pad. */  in __media_pipeline_start()
771 			if (link->sink != pad && link->source != pad)  in __media_pipeline_start()
774 			/* Record if the pad has links and enabled links. */  in __media_pipeline_start()
781 			 * current pad as its sink.  in __media_pipeline_start()
786 			if (link->sink != pad)  in __media_pipeline_start()
812 		 * 3. If the pad has the MEDIA_PAD_FL_MUST_CONNECT flag set,  in __media_pipeline_start()
815 		if ((pad->flags & MEDIA_PAD_FL_MUST_CONNECT) && has_link &&  in __media_pipeline_start()
818 				"Pad '%s':%u must be connected by an enabled link\n",  in __media_pipeline_start()
819 				pad->entity->name, pad->index);  in __media_pipeline_start()
824 		/* Validation passed, store the pipe pointer in the pad. */  in __media_pipeline_start()
825 		pad->pipe = pipe;  in __media_pipeline_start()
842 		err_ppad->pad->pipe = NULL;  in __media_pipeline_start()
851 __must_check int media_pipeline_start(struct media_pad *pad,  in media_pipeline_start()  argument
854 	struct media_device *mdev = pad->entity->graph_obj.mdev;  in media_pipeline_start()
858 	ret = __media_pipeline_start(pad, pipe);  in media_pipeline_start()
864 void __media_pipeline_stop(struct media_pad *pad)  in __media_pipeline_stop()  argument
866 	struct media_pipeline *pipe = pad->pipe;  in __media_pipeline_stop()
880 		ppad->pad->pipe = NULL;  in __media_pipeline_stop()
889 void media_pipeline_stop(struct media_pad *pad)  in media_pipeline_stop()  argument
891 	struct media_device *mdev = pad->entity->graph_obj.mdev;  in media_pipeline_stop()
894 	__media_pipeline_stop(pad);  in media_pipeline_stop()
899 __must_check int media_pipeline_alloc_start(struct media_pad *pad)  in media_pipeline_alloc_start()  argument
901 	struct media_device *mdev = pad->entity->graph_obj.mdev;  in media_pipeline_alloc_start()
912 	pipe = media_pad_pipeline(pad);  in media_pipeline_alloc_start()
924 	ret = __media_pipeline_start(pad, pipe);  in media_pipeline_alloc_start()
1260 struct media_pad *media_pad_remote_pad_first(const struct media_pad *pad)  in media_pad_remote_pad_first()  argument
1264 	for_each_media_entity_data_link(pad->entity, link) {  in media_pad_remote_pad_first()
1268 		if (link->source == pad)  in media_pad_remote_pad_first()
1271 		if (link->sink == pad)  in media_pad_remote_pad_first()
1284 	struct media_pad *pad = NULL;  in media_entity_remote_pad_unique()  local
1305 			if (pad)  in media_entity_remote_pad_unique()
1308 			pad = remote_pad;  in media_entity_remote_pad_unique()
1312 	if (!pad)  in media_entity_remote_pad_unique()
1315 	return pad;  in media_entity_remote_pad_unique()
1319 struct media_pad *media_pad_remote_pad_unique(const struct media_pad *pad)  in media_pad_remote_pad_unique()  argument
1324 	list_for_each_entry(link, &pad->entity->links, list) {  in media_pad_remote_pad_unique()
1330 		if (link->sink == pad)  in media_pad_remote_pad_unique()
1332 		else if (link->source == pad)  in media_pad_remote_pad_unique()
1387 	struct media_pad *pad;  in media_entity_pipeline()  local
1389 	media_entity_for_each_pad(entity, pad) {  in media_entity_pipeline()
1390 		if (pad->pipe)  in media_entity_pipeline()
1391 			return pad->pipe;  in media_entity_pipeline()
1398 struct media_pipeline *media_pad_pipeline(struct media_pad *pad)  in media_pad_pipeline()  argument
1400 	return pad->pipe;  in media_pad_pipeline()