2  * Media entity
23 #include <media/media-entity.h>
30 		return "entity";  in gobj_type()
109 			"%s id %u: entity '%s'\n",  in dev_dbg_obj()
135 			pad->entity->name, pad->index);  in dev_dbg_obj()
206 int media_entity_pads_init(struct media_entity *entity, u16 num_pads,  in media_entity_pads_init()  argument
209 	struct media_device *mdev = entity->graph_obj.mdev;  in media_entity_pads_init()
215 	entity->num_pads = num_pads;  in media_entity_pads_init()
216 	entity->pads = pads;  in media_entity_pads_init()
222 		pads[i].entity = entity;  in media_entity_pads_init()
226 					&entity->pads[i].graph_obj);  in media_entity_pads_init()
241 media_entity_other(struct media_entity *entity, struct media_link *link)  in media_entity_other()  argument
243 	if (link->source->entity == entity)  in media_entity_other()
244 		return link->sink->entity;  in media_entity_other()
246 		return link->source->entity;  in media_entity_other()
249 /* push an entity to traversal stack */
251 		       struct media_entity *entity)  in stack_push()  argument
258 	graph->stack[graph->top].link = entity->links.next;  in stack_push()
259 	graph->stack[graph->top].entity = entity;  in stack_push()
264 	struct media_entity *entity;  in stack_pop()  local
266 	entity = graph->stack[graph->top].entity;  in stack_pop()
269 	return entity;  in stack_pop()
273 #define stack_top(en)	((en)->stack[(en)->top].entity)
304 			    struct media_entity *entity)  in media_graph_walk_start()  argument
307 	media_entity_enum_set(&graph->ent_enum, entity);  in media_graph_walk_start()
310 	graph->stack[graph->top].entity = NULL;  in media_graph_walk_start()
311 	stack_push(graph, entity);  in media_graph_walk_start()
312 	dev_dbg(entity->graph_obj.mdev->dev,  in media_graph_walk_start()
313 		"begin graph walk at '%s'\n", entity->name);  in media_graph_walk_start()
319 	struct media_entity *entity = stack_top(graph);  in media_graph_walk_iter()  local
328 		dev_dbg(entity->graph_obj.mdev->dev,  in media_graph_walk_iter()
330 			link->source->entity->name, link->source->index,  in media_graph_walk_iter()
331 			link->sink->entity->name, link->sink->index);  in media_graph_walk_iter()
335 	/* Get the entity in the other end of the link . */  in media_graph_walk_iter()
336 	next = media_entity_other(entity, link);  in media_graph_walk_iter()
338 	/* Has the entity already been visited? */  in media_graph_walk_iter()
341 		dev_dbg(entity->graph_obj.mdev->dev,  in media_graph_walk_iter()
342 			"walk: skipping entity '%s' (already seen)\n",  in media_graph_walk_iter()
347 	/* Push the new entity to stack and start over. */  in media_graph_walk_iter()
350 	dev_dbg(entity->graph_obj.mdev->dev, "walk: pushing '%s' on stack\n",  in media_graph_walk_iter()
356 	struct media_entity *entity;  in media_graph_walk_next()  local
362 	 * Depth first search. Push entity to stack and continue from  in media_graph_walk_next()
369 	entity = stack_pop(graph);  in media_graph_walk_next()
370 	dev_dbg(entity->graph_obj.mdev->dev,  in media_graph_walk_next()
371 		"walk: returning entity '%s'\n", entity->name);  in media_graph_walk_next()
373 	return entity;  in media_graph_walk_next()
377 int media_entity_get_fwnode_pad(struct media_entity *entity,  in media_entity_get_fwnode_pad()  argument
385 	if (!entity->ops || !entity->ops->get_fwnode_pad) {  in media_entity_get_fwnode_pad()
386 		for (i = 0; i < entity->num_pads; i++) {  in media_entity_get_fwnode_pad()
387 			if (entity->pads[i].flags & direction_flags)  in media_entity_get_fwnode_pad()
398 	ret = entity->ops->get_fwnode_pad(&endpoint);  in media_entity_get_fwnode_pad()
402 	if (ret >= entity->num_pads)  in media_entity_get_fwnode_pad()
405 	if (!(entity->pads[ret].flags & direction_flags))  in media_entity_get_fwnode_pad()
416 __must_check int __media_pipeline_start(struct media_entity *entity,  in __media_pipeline_start()  argument
419 	struct media_device *mdev = entity->graph_obj.mdev;  in __media_pipeline_start()
421 	struct media_entity *entity_err = entity;  in __media_pipeline_start()
431 	media_graph_walk_start(&pipe->graph, entity);  in __media_pipeline_start()
433 	while ((entity = media_graph_walk_next(graph))) {  in __media_pipeline_start()
437 		entity->stream_count++;  in __media_pipeline_start()
439 		if (WARN_ON(entity->pipe && entity->pipe != pipe)) {  in __media_pipeline_start()
444 		entity->pipe = pipe;  in __media_pipeline_start()
447 		if (entity->stream_count > 1)  in __media_pipeline_start()
450 		if (!entity->ops || !entity->ops->link_validate)  in __media_pipeline_start()
453 		bitmap_zero(active, entity->num_pads);  in __media_pipeline_start()
454 		bitmap_fill(has_no_links, entity->num_pads);  in __media_pipeline_start()
456 		list_for_each_entry(link, &entity->links, list) {  in __media_pipeline_start()
457 			struct media_pad *pad = link->sink->entity == entity  in __media_pipeline_start()
480 			ret = entity->ops->link_validate(link);  in __media_pipeline_start()
482 				dev_dbg(entity->graph_obj.mdev->dev,  in __media_pipeline_start()
484 					link->source->entity->name,  in __media_pipeline_start()
486 					entity->name, link->sink->index, ret);  in __media_pipeline_start()
492 		bitmap_or(active, active, has_no_links, entity->num_pads);  in __media_pipeline_start()
494 		if (!bitmap_full(active, entity->num_pads)) {  in __media_pipeline_start()
496 			dev_dbg(entity->graph_obj.mdev->dev,  in __media_pipeline_start()
498 				entity->name,  in __media_pipeline_start()
500 					active, entity->num_pads));  in __media_pipeline_start()
526 		if (entity_err == entity)  in __media_pipeline_start()
538 __must_check int media_pipeline_start(struct media_entity *entity,  in media_pipeline_start()  argument
541 	struct media_device *mdev = entity->graph_obj.mdev;  in media_pipeline_start()
545 	ret = __media_pipeline_start(entity, pipe);  in media_pipeline_start()
551 void __media_pipeline_stop(struct media_entity *entity)  in __media_pipeline_stop()  argument
553 	struct media_graph *graph = &entity->pipe->graph;  in __media_pipeline_stop()
554 	struct media_pipeline *pipe = entity->pipe;  in __media_pipeline_stop()
563 	media_graph_walk_start(graph, entity);  in __media_pipeline_stop()
565 	while ((entity = media_graph_walk_next(graph))) {  in __media_pipeline_stop()
567 		if (!WARN_ON_ONCE(entity->stream_count <= 0)) {  in __media_pipeline_stop()
568 			entity->stream_count--;  in __media_pipeline_stop()
569 			if (entity->stream_count == 0)  in __media_pipeline_stop()
570 				entity->pipe = NULL;  in __media_pipeline_stop()
580 void media_pipeline_stop(struct media_entity *entity)  in media_pipeline_stop()  argument
582 	struct media_device *mdev = entity->graph_obj.mdev;  in media_pipeline_stop()
585 	__media_pipeline_stop(entity);  in media_pipeline_stop()
594 struct media_entity *media_entity_get(struct media_entity *entity)  in media_entity_get()  argument
596 	if (entity == NULL)  in media_entity_get()
599 	if (entity->graph_obj.mdev->dev &&  in media_entity_get()
600 	    !try_module_get(entity->graph_obj.mdev->dev->driver->owner))  in media_entity_get()
603 	return entity;  in media_entity_get()
607 void media_entity_put(struct media_entity *entity)  in media_entity_put()  argument
609 	if (entity == NULL)  in media_entity_put()
612 	if (entity->graph_obj.mdev->dev)  in media_entity_put()
613 		module_put(entity->graph_obj.mdev->dev->driver->owner);  in media_entity_put()
634 static void __media_entity_remove_link(struct media_entity *entity,  in __media_entity_remove_link()  argument
640 	if (link->source->entity == entity)  in __media_entity_remove_link()
641 		remote = link->sink->entity;  in __media_entity_remove_link()
643 		remote = link->source->entity;  in __media_entity_remove_link()
649 		if (link->source->entity == entity)  in __media_entity_remove_link()
727 	struct media_entity *entity;  in media_create_pad_links()  local
764 	media_device_for_each_entity(entity, mdev) {  in media_create_pad_links()
765 		if (entity->function != function)  in media_create_pad_links()
770 						    entity, sink_pad, flags);  in media_create_pad_links()
772 			ret = media_create_pad_link(entity, source_pad,  in media_create_pad_links()
782 void __media_entity_remove_links(struct media_entity *entity)  in __media_entity_remove_links()  argument
786 	list_for_each_entry_safe(link, tmp, &entity->links, list)  in __media_entity_remove_links()
787 		__media_entity_remove_link(entity, link);  in __media_entity_remove_links()
789 	entity->num_links = 0;  in __media_entity_remove_links()
790 	entity->num_backlinks = 0;  in __media_entity_remove_links()
794 void media_entity_remove_links(struct media_entity *entity)  in media_entity_remove_links()  argument
796 	struct media_device *mdev = entity->graph_obj.mdev;  in media_entity_remove_links()
798 	/* Do nothing if the entity is not registered. */  in media_entity_remove_links()
803 	__media_entity_remove_links(entity);  in media_entity_remove_links()
813 	ret = media_entity_call(link->source->entity, link_setup,  in __media_entity_setup_link_notify()
818 	ret = media_entity_call(link->sink->entity, link_setup,  in __media_entity_setup_link_notify()
821 		media_entity_call(link->source->entity, link_setup,  in __media_entity_setup_link_notify()
852 	source = link->source->entity;  in __media_entity_setup_link()
853 	sink = link->sink->entity;  in __media_entity_setup_link()
895 	list_for_each_entry(link, &source->entity->links, list) {  in media_entity_find_link()
896 		if (link->source->entity == source->entity &&  in media_entity_find_link()
898 		    link->sink->entity == sink->entity &&  in media_entity_find_link()
911 	list_for_each_entry(link, &pad->entity->links, list) {  in media_entity_remote_pad()
969 struct media_link *media_create_intf_link(struct media_entity *entity,  in media_create_intf_link()  argument
980 	link->entity = entity;  in media_create_intf_link()