1215 	struct uvc_video_chain *chain;  in uvc_gpio_event()  local
1224 	chain = list_first_entry(&dev->chains, struct uvc_video_chain, list);  in uvc_gpio_event()
1225 	uvc_ctrl_status_event(chain, unit->controls, &new_val);  in uvc_gpio_event()
1340 static int uvc_scan_chain_entity(struct uvc_video_chain *chain,  in uvc_scan_chain_entity()  argument
1348 			uvc_dbg(chain->dev, DESCR,  in uvc_scan_chain_entity()
1359 		if (chain->processing != NULL) {  in uvc_scan_chain_entity()
1360 			uvc_dbg(chain->dev, DESCR,  in uvc_scan_chain_entity()
1365 		chain->processing = entity;  in uvc_scan_chain_entity()
1375 		if (chain->selector != NULL) {  in uvc_scan_chain_entity()
1376 			uvc_dbg(chain->dev, DESCR,  in uvc_scan_chain_entity()
1381 		chain->selector = entity;  in uvc_scan_chain_entity()
1407 		uvc_dbg(chain->dev, DESCR,  in uvc_scan_chain_entity()
1413 	list_add_tail(&entity->chain, &chain->entities);  in uvc_scan_chain_entity()
1417 static int uvc_scan_chain_forward(struct uvc_video_chain *chain,  in uvc_scan_chain_forward()  argument
1428 		forward = uvc_entity_by_reference(chain->dev, entity->id,  in uvc_scan_chain_forward()
1434 		if (forward->chain.next || forward->chain.prev) {  in uvc_scan_chain_forward()
1435 			uvc_dbg(chain->dev, DESCR,  in uvc_scan_chain_forward()
1444 				uvc_dbg(chain->dev, DESCR,  in uvc_scan_chain_forward()
1463 				source = uvc_entity_by_id(chain->dev,  in uvc_scan_chain_forward()
1466 					uvc_dbg(chain->dev, DESCR,  in uvc_scan_chain_forward()
1475 			list_add_tail(&forward->chain, &chain->entities);  in uvc_scan_chain_forward()
1488 				uvc_dbg(chain->dev, DESCR,  in uvc_scan_chain_forward()
1495 				uvc_dbg(chain->dev, DESCR,  in uvc_scan_chain_forward()
1501 			list_add_tail(&forward->chain, &chain->entities);  in uvc_scan_chain_forward()
1516 static int uvc_scan_chain_backward(struct uvc_video_chain *chain,  in uvc_scan_chain_backward()  argument
1538 		chain->selector = entity;  in uvc_scan_chain_backward()
1541 			term = uvc_entity_by_id(chain->dev, id);  in uvc_scan_chain_backward()
1543 				uvc_dbg(chain->dev, DESCR,  in uvc_scan_chain_backward()
1549 			if (term->chain.next || term->chain.prev) {  in uvc_scan_chain_backward()
1550 				uvc_dbg(chain->dev, DESCR,  in uvc_scan_chain_backward()
1558 			list_add_tail(&term->chain, &chain->entities);  in uvc_scan_chain_backward()
1559 			uvc_scan_chain_forward(chain, term, entity);  in uvc_scan_chain_backward()
1583 	entity = uvc_entity_by_id(chain->dev, id);  in uvc_scan_chain_backward()
1585 		uvc_dbg(chain->dev, DESCR,  in uvc_scan_chain_backward()
1594 static int uvc_scan_chain(struct uvc_video_chain *chain,  in uvc_scan_chain()  argument
1599 	uvc_dbg(chain->dev, PROBE, "Scanning UVC chain:");  in uvc_scan_chain()
1606 		if (entity->chain.next || entity->chain.prev) {  in uvc_scan_chain()
1607 			uvc_dbg(chain->dev, DESCR,  in uvc_scan_chain()
1614 		if (uvc_scan_chain_entity(chain, entity) < 0)  in uvc_scan_chain()
1618 		if (uvc_scan_chain_forward(chain, entity, prev) < 0)  in uvc_scan_chain()
1623 		if (uvc_scan_chain_backward(chain, &entity) < 0)  in uvc_scan_chain()
1637 	list_for_each_entry(term, terms, chain) {  in uvc_print_terms()
1654 static const char *uvc_print_chain(struct uvc_video_chain *chain)  in uvc_print_chain()  argument
1659 	p += uvc_print_terms(&chain->entities, UVC_TERM_INPUT, p);  in uvc_print_chain()
1661 	uvc_print_terms(&chain->entities, UVC_TERM_OUTPUT, p);  in uvc_print_chain()
1668 	struct uvc_video_chain *chain;  in uvc_alloc_chain()  local
1670 	chain = kzalloc(sizeof(*chain), GFP_KERNEL);  in uvc_alloc_chain()
1671 	if (chain == NULL)  in uvc_alloc_chain()
1674 	INIT_LIST_HEAD(&chain->entities);  in uvc_alloc_chain()
1675 	mutex_init(&chain->ctrl_mutex);  in uvc_alloc_chain()
1676 	chain->dev = dev;  in uvc_alloc_chain()
1677 	v4l2_prio_init(&chain->prio);  in uvc_alloc_chain()
1679 	return chain;  in uvc_alloc_chain()
1697 	struct uvc_video_chain *chain;  in uvc_scan_fallback()  local
1725 	chain = uvc_alloc_chain(dev);  in uvc_scan_fallback()
1726 	if (chain == NULL)  in uvc_scan_fallback()
1729 	if (uvc_scan_chain_entity(chain, oterm) < 0)  in uvc_scan_fallback()
1749 		if (uvc_scan_chain_entity(chain, entity) < 0)  in uvc_scan_fallback()
1756 	if (uvc_scan_chain_entity(chain, iterm) < 0)  in uvc_scan_fallback()
1761 	list_add_tail(&chain->list, &dev->chains);  in uvc_scan_fallback()
1764 		uvc_print_chain(chain));  in uvc_scan_fallback()
1769 	kfree(chain);  in uvc_scan_fallback()
1780 	struct uvc_video_chain *chain;  in uvc_scan_device()  local
1793 		if (term->chain.next || term->chain.prev)  in uvc_scan_device()
1796 		chain = uvc_alloc_chain(dev);  in uvc_scan_device()
1797 		if (chain == NULL)  in uvc_scan_device()
1802 		if (uvc_scan_chain(chain, term) < 0) {  in uvc_scan_device()
1803 			kfree(chain);  in uvc_scan_device()
1808 			uvc_print_chain(chain));  in uvc_scan_device()
1810 		list_add_tail(&chain->list, &dev->chains);  in uvc_scan_device()
1823 		chain = list_first_entry(&dev->chains,  in uvc_scan_device()
1825 		list_add_tail(&dev->gpio_unit->chain, &chain->entities);  in uvc_scan_device()
1861 		struct uvc_video_chain *chain;  in uvc_delete()  local
1862 		chain = list_entry(p, struct uvc_video_chain, list);  in uvc_delete()
1863 		kfree(chain);  in uvc_delete()
1947 	vdev->prio = &stream->chain->prio;  in uvc_register_video_device()
2000 		stream->chain->caps |= V4L2_CAP_VIDEO_CAPTURE  in uvc_register_video()
2003 		stream->chain->caps |= V4L2_CAP_VIDEO_OUTPUT;  in uvc_register_video()
2017 	struct uvc_video_chain *chain)  in uvc_register_terms()  argument
2023 	list_for_each_entry(term, &chain->entities, chain) {  in uvc_register_terms()
2035 		stream->chain = chain;  in uvc_register_terms()
2054 	struct uvc_video_chain *chain;  in uvc_register_chains()  local
2057 	list_for_each_entry(chain, &dev->chains, list) {  in uvc_register_chains()
2058 		ret = uvc_register_terms(dev, chain);  in uvc_register_chains()
2063 		ret = uvc_mc_register_entities(chain);  in uvc_register_chains()