81 				    struct drm_dp_mst_branch *mstb);
85 				   struct drm_dp_mst_branch *mstb);
88 					   struct drm_dp_mst_branch *mstb,
1291 static int drm_dp_mst_wait_tx_reply(struct drm_dp_mst_branch *mstb,  in drm_dp_mst_wait_tx_reply()  argument
1294 	struct drm_dp_mst_topology_mgr *mgr = mstb->mgr;  in drm_dp_mst_wait_tx_reply()
1358 	struct drm_dp_mst_branch *mstb;  in drm_dp_add_mst_branch_device()  local
1360 	mstb = kzalloc(sizeof(*mstb), GFP_KERNEL);  in drm_dp_add_mst_branch_device()
1361 	if (!mstb)  in drm_dp_add_mst_branch_device()
1364 	mstb->lct = lct;  in drm_dp_add_mst_branch_device()
1366 		memcpy(mstb->rad, rad, lct / 2);  in drm_dp_add_mst_branch_device()
1367 	INIT_LIST_HEAD(&mstb->ports);  in drm_dp_add_mst_branch_device()
1368 	kref_init(&mstb->topology_kref);  in drm_dp_add_mst_branch_device()
1369 	kref_init(&mstb->malloc_kref);  in drm_dp_add_mst_branch_device()
1370 	return mstb;  in drm_dp_add_mst_branch_device()
1375 	struct drm_dp_mst_branch *mstb =  in drm_dp_free_mst_branch_device()  local
1378 	if (mstb->port_parent)  in drm_dp_free_mst_branch_device()
1379 		drm_dp_mst_put_port_malloc(mstb->port_parent);  in drm_dp_free_mst_branch_device()
1381 	kfree(mstb);  in drm_dp_free_mst_branch_device()
1484 drm_dp_mst_get_mstb_malloc(struct drm_dp_mst_branch *mstb)  in drm_dp_mst_get_mstb_malloc()  argument
1486 	kref_get(&mstb->malloc_kref);  in drm_dp_mst_get_mstb_malloc()
1487 	DRM_DEBUG("mstb %p (%d)\n", mstb, kref_read(&mstb->malloc_kref));  in drm_dp_mst_get_mstb_malloc()
1502 drm_dp_mst_put_mstb_malloc(struct drm_dp_mst_branch *mstb)  in drm_dp_mst_put_mstb_malloc()  argument
1504 	DRM_DEBUG("mstb %p (%d)\n", mstb, kref_read(&mstb->malloc_kref) - 1);  in drm_dp_mst_put_mstb_malloc()
1505 	kref_put(&mstb->malloc_kref, drm_dp_free_mst_branch_device);  in drm_dp_mst_put_mstb_malloc()
1679 drm_dp_mst_dump_mstb_topology_history(struct drm_dp_mst_branch *mstb)  in drm_dp_mst_dump_mstb_topology_history()  argument
1681 	__dump_topology_ref_history(&mstb->topology_ref_history, mstb,  in drm_dp_mst_dump_mstb_topology_history()
1693 save_mstb_topology_ref(struct drm_dp_mst_branch *mstb,  in save_mstb_topology_ref()  argument
1696 	__topology_ref_save(mstb->mgr, &mstb->topology_ref_history, type);  in save_mstb_topology_ref()
1723 drm_dp_mst_dump_mstb_topology_history(struct drm_dp_mst_branch *mstb) {}  in drm_dp_mst_dump_mstb_topology_history()  argument
1726 #define save_mstb_topology_ref(mstb, type)  argument
1732 	struct drm_dp_mst_branch *mstb =  in drm_dp_destroy_mst_branch_device()  local
1734 	struct drm_dp_mst_topology_mgr *mgr = mstb->mgr;  in drm_dp_destroy_mst_branch_device()
1736 	drm_dp_mst_dump_mstb_topology_history(mstb);  in drm_dp_destroy_mst_branch_device()
1738 	INIT_LIST_HEAD(&mstb->destroy_next);  in drm_dp_destroy_mst_branch_device()
1745 	list_add(&mstb->destroy_next, &mgr->destroy_branch_device_list);  in drm_dp_destroy_mst_branch_device()
1773 drm_dp_mst_topology_try_get_mstb(struct drm_dp_mst_branch *mstb)  in drm_dp_mst_topology_try_get_mstb()  argument
1777 	topology_ref_history_lock(mstb->mgr);  in drm_dp_mst_topology_try_get_mstb()
1778 	ret = kref_get_unless_zero(&mstb->topology_kref);  in drm_dp_mst_topology_try_get_mstb()
1781 			  mstb, kref_read(&mstb->topology_kref));  in drm_dp_mst_topology_try_get_mstb()
1782 		save_mstb_topology_ref(mstb, DRM_DP_MST_TOPOLOGY_REF_GET);  in drm_dp_mst_topology_try_get_mstb()
1785 	topology_ref_history_unlock(mstb->mgr);  in drm_dp_mst_topology_try_get_mstb()
1804 static void drm_dp_mst_topology_get_mstb(struct drm_dp_mst_branch *mstb)  in drm_dp_mst_topology_get_mstb()  argument
1806 	topology_ref_history_lock(mstb->mgr);  in drm_dp_mst_topology_get_mstb()
1808 	save_mstb_topology_ref(mstb, DRM_DP_MST_TOPOLOGY_REF_GET);  in drm_dp_mst_topology_get_mstb()
1809 	WARN_ON(kref_read(&mstb->topology_kref) == 0);  in drm_dp_mst_topology_get_mstb()
1810 	kref_get(&mstb->topology_kref);  in drm_dp_mst_topology_get_mstb()
1811 	DRM_DEBUG("mstb %p (%d)\n", mstb, kref_read(&mstb->topology_kref));  in drm_dp_mst_topology_get_mstb()
1813 	topology_ref_history_unlock(mstb->mgr);  in drm_dp_mst_topology_get_mstb()
1829 drm_dp_mst_topology_put_mstb(struct drm_dp_mst_branch *mstb)  in drm_dp_mst_topology_put_mstb()  argument
1831 	topology_ref_history_lock(mstb->mgr);  in drm_dp_mst_topology_put_mstb()
1834 		  mstb, kref_read(&mstb->topology_kref) - 1);  in drm_dp_mst_topology_put_mstb()
1835 	save_mstb_topology_ref(mstb, DRM_DP_MST_TOPOLOGY_REF_PUT);  in drm_dp_mst_topology_put_mstb()
1837 	topology_ref_history_unlock(mstb->mgr);  in drm_dp_mst_topology_put_mstb()
1838 	kref_put(&mstb->topology_kref, drm_dp_destroy_mst_branch_device);  in drm_dp_mst_topology_put_mstb()
1955 drm_dp_mst_topology_get_mstb_validated_locked(struct drm_dp_mst_branch *mstb,  in drm_dp_mst_topology_get_mstb_validated_locked()  argument
1961 	if (to_find == mstb)  in drm_dp_mst_topology_get_mstb_validated_locked()
1962 		return mstb;  in drm_dp_mst_topology_get_mstb_validated_locked()
1964 	list_for_each_entry(port, &mstb->ports, next) {  in drm_dp_mst_topology_get_mstb_validated_locked()
1965 		if (port->mstb) {  in drm_dp_mst_topology_get_mstb_validated_locked()
1967 			    port->mstb, to_find);  in drm_dp_mst_topology_get_mstb_validated_locked()
1977 				       struct drm_dp_mst_branch *mstb)  in drm_dp_mst_topology_get_mstb_validated()  argument
1984 		    mgr->mst_primary, mstb);  in drm_dp_mst_topology_get_mstb_validated()
1994 drm_dp_mst_topology_get_port_validated_locked(struct drm_dp_mst_branch *mstb,  in drm_dp_mst_topology_get_port_validated_locked()  argument
1999 	list_for_each_entry(port, &mstb->ports, next) {  in drm_dp_mst_topology_get_port_validated_locked()
2003 		if (port->mstb) {  in drm_dp_mst_topology_get_port_validated_locked()
2005 			    port->mstb, to_find);  in drm_dp_mst_topology_get_port_validated_locked()
2031 static struct drm_dp_mst_port *drm_dp_get_port(struct drm_dp_mst_branch *mstb, u8 port_num)  in drm_dp_get_port()  argument
2036 	list_for_each_entry(port, &mstb->ports, next) {  in drm_dp_get_port()
2089 	struct drm_dp_mst_branch *mstb;  in drm_dp_port_set_pdt()  local
2114 			drm_dp_mst_topology_put_mstb(port->mstb);  in drm_dp_port_set_pdt()
2115 			port->mstb = NULL;  in drm_dp_port_set_pdt()
2129 			mstb = drm_dp_add_mst_branch_device(lct, rad);  in drm_dp_port_set_pdt()
2130 			if (!mstb) {  in drm_dp_port_set_pdt()
2138 			port->mstb = mstb;  in drm_dp_port_set_pdt()
2139 			mstb->mgr = port->mgr;  in drm_dp_port_set_pdt()
2140 			mstb->port_parent = port;  in drm_dp_port_set_pdt()
2206 static int drm_dp_check_mstb_guid(struct drm_dp_mst_branch *mstb, u8 *guid)  in drm_dp_check_mstb_guid()  argument
2210 	memcpy(mstb->guid, guid, 16);  in drm_dp_check_mstb_guid()
2212 	if (!drm_dp_validate_guid(mstb->mgr, mstb->guid)) {  in drm_dp_check_mstb_guid()
2213 		if (mstb->port_parent) {  in drm_dp_check_mstb_guid()
2214 			ret = drm_dp_send_dpcd_write(mstb->mgr,  in drm_dp_check_mstb_guid()
2215 						     mstb->port_parent,  in drm_dp_check_mstb_guid()
2216 						     DP_GUID, 16, mstb->guid);  in drm_dp_check_mstb_guid()
2218 			ret = drm_dp_dpcd_write(mstb->mgr->aux,  in drm_dp_check_mstb_guid()
2219 						DP_GUID, mstb->guid, 16);  in drm_dp_check_mstb_guid()
2229 static void build_mst_prop_path(const struct drm_dp_mst_branch *mstb,  in build_mst_prop_path()  argument
2237 	snprintf(proppath, proppath_size, "mst:%d", mstb->mgr->conn_base_id);  in build_mst_prop_path()
2238 	for (i = 0; i < (mstb->lct - 1); i++) {  in build_mst_prop_path()
2240 		int port_num = (mstb->rad[i / 2] >> shift) & 0xf;  in build_mst_prop_path()
2290 drm_dp_mst_port_add_connector(struct drm_dp_mst_branch *mstb,  in drm_dp_mst_port_add_connector()  argument
2297 	build_mst_prop_path(mstb, port->port_num, proppath, sizeof(proppath));  in drm_dp_mst_port_add_connector()
2336 		    struct drm_dp_mst_branch *mstb, u8 port_number)  in drm_dp_mst_add_port()  argument
2345 	port->parent = mstb;  in drm_dp_mst_add_port()
2359 	drm_dp_mst_get_mstb_malloc(mstb);  in drm_dp_mst_add_port()
2365 drm_dp_mst_handle_link_address_port(struct drm_dp_mst_branch *mstb,  in drm_dp_mst_handle_link_address_port()  argument
2369 	struct drm_dp_mst_topology_mgr *mgr = mstb->mgr;  in drm_dp_mst_handle_link_address_port()
2376 	port = drm_dp_get_port(mstb, port_msg->port_number);  in drm_dp_mst_handle_link_address_port()
2378 		port = drm_dp_mst_add_port(dev, mgr, mstb,  in drm_dp_mst_handle_link_address_port()
2390 		port = drm_dp_mst_add_port(dev, mgr, mstb,  in drm_dp_mst_handle_link_address_port()
2430 		list_add(&port->next, &mstb->ports);  in drm_dp_mst_handle_link_address_port()
2431 		mstb->num_ports++;  in drm_dp_mst_handle_link_address_port()
2441 			ret = drm_dp_send_enum_path_resources(mgr, mstb,  in drm_dp_mst_handle_link_address_port()
2471 		drm_dp_mst_port_add_connector(mstb, port);  in drm_dp_mst_handle_link_address_port()
2473 	if (send_link_addr && port->mstb) {  in drm_dp_mst_handle_link_address_port()
2474 		ret = drm_dp_send_link_address(mgr, port->mstb);  in drm_dp_mst_handle_link_address_port()
2495 drm_dp_mst_handle_conn_stat(struct drm_dp_mst_branch *mstb,  in drm_dp_mst_handle_conn_stat()  argument
2498 	struct drm_dp_mst_topology_mgr *mgr = mstb->mgr;  in drm_dp_mst_handle_conn_stat()
2505 	port = drm_dp_get_port(mstb, conn_stat->port_number);  in drm_dp_mst_handle_conn_stat()
2517 			mstb->link_address_sent = false;  in drm_dp_mst_handle_conn_stat()
2527 		mstb->link_address_sent = false;  in drm_dp_mst_handle_conn_stat()
2539 			drm_dp_send_enum_path_resources(mgr, mstb, port);  in drm_dp_mst_handle_conn_stat()
2580 		drm_dp_mst_port_add_connector(mstb, port);  in drm_dp_mst_handle_conn_stat()
2585 		queue_work(system_long_wq, &mstb->mgr->work);  in drm_dp_mst_handle_conn_stat()
2591 	struct drm_dp_mst_branch *mstb;  in drm_dp_get_mst_branch_device()  local
2597 	mstb = mgr->mst_primary;  in drm_dp_get_mst_branch_device()
2599 	if (!mstb)  in drm_dp_get_mst_branch_device()
2606 		list_for_each_entry(port, &mstb->ports, next) {  in drm_dp_get_mst_branch_device()
2608 				mstb = port->mstb;  in drm_dp_get_mst_branch_device()
2609 				if (!mstb) {  in drm_dp_get_mst_branch_device()
2618 	ret = drm_dp_mst_topology_try_get_mstb(mstb);  in drm_dp_get_mst_branch_device()
2620 		mstb = NULL;  in drm_dp_get_mst_branch_device()
2623 	return mstb;  in drm_dp_get_mst_branch_device()
2627 	struct drm_dp_mst_branch *mstb,  in get_mst_branch_device_by_guid_helper()  argument
2633 	if (memcmp(mstb->guid, guid, 16) == 0)  in get_mst_branch_device_by_guid_helper()
2634 		return mstb;  in get_mst_branch_device_by_guid_helper()
2637 	list_for_each_entry(port, &mstb->ports, next) {  in get_mst_branch_device_by_guid_helper()
2638 		if (!port->mstb)  in get_mst_branch_device_by_guid_helper()
2641 		found_mstb = get_mst_branch_device_by_guid_helper(port->mstb, guid);  in get_mst_branch_device_by_guid_helper()
2654 	struct drm_dp_mst_branch *mstb;  in drm_dp_get_mst_branch_device_by_guid()  local
2660 	mstb = get_mst_branch_device_by_guid_helper(mgr->mst_primary, guid);  in drm_dp_get_mst_branch_device_by_guid()
2661 	if (mstb) {  in drm_dp_get_mst_branch_device_by_guid()
2662 		ret = drm_dp_mst_topology_try_get_mstb(mstb);  in drm_dp_get_mst_branch_device_by_guid()
2664 			mstb = NULL;  in drm_dp_get_mst_branch_device_by_guid()
2668 	return mstb;  in drm_dp_get_mst_branch_device_by_guid()
2672 					       struct drm_dp_mst_branch *mstb)  in drm_dp_check_and_send_link_address()  argument
2678 	if (!mstb->link_address_sent) {  in drm_dp_check_and_send_link_address()
2679 		ret = drm_dp_send_link_address(mgr, mstb);  in drm_dp_check_and_send_link_address()
2686 	list_for_each_entry(port, &mstb->ports, next) {  in drm_dp_check_and_send_link_address()
2692 		if (port->mstb)  in drm_dp_check_and_send_link_address()
2694 			    mgr, port->mstb);  in drm_dp_check_and_send_link_address()
2715 	struct drm_dp_mst_branch *mstb;  in drm_dp_mst_link_probe_work()  local
2725 	mstb = mgr->mst_primary;  in drm_dp_mst_link_probe_work()
2726 	if (mstb) {  in drm_dp_mst_link_probe_work()
2727 		ret = drm_dp_mst_topology_try_get_mstb(mstb);  in drm_dp_mst_link_probe_work()
2729 			mstb = NULL;  in drm_dp_mst_link_probe_work()
2732 	if (!mstb) {  in drm_dp_mst_link_probe_work()
2747 		drm_dp_send_clear_payload_id_table(mgr, mstb);  in drm_dp_mst_link_probe_work()
2750 	ret = drm_dp_check_and_send_link_address(mgr, mstb);  in drm_dp_mst_link_probe_work()
2751 	drm_dp_mst_topology_put_mstb(mstb);  in drm_dp_mst_link_probe_work()
2821 	struct drm_dp_mst_branch *mstb = txmsg->dst;  in set_hdr_from_dst_qlock()  local
2831 	hdr->lct = mstb->lct;  in set_hdr_from_dst_qlock()
2832 	hdr->lcr = mstb->lct - 1;  in set_hdr_from_dst_qlock()
2833 	if (mstb->lct > 1)  in set_hdr_from_dst_qlock()
2834 		memcpy(hdr->rad, mstb->rad, mstb->lct / 2);  in set_hdr_from_dst_qlock()
2962 				     struct drm_dp_mst_branch *mstb)  in drm_dp_send_link_address()  argument
2974 	txmsg->dst = mstb;  in drm_dp_send_link_address()
2977 	mstb->link_address_sent = true;  in drm_dp_send_link_address()
2981 	ret = drm_dp_mst_wait_tx_reply(mstb, txmsg);  in drm_dp_send_link_address()
2996 	ret = drm_dp_check_mstb_guid(mstb, reply->guid);  in drm_dp_send_link_address()
3000 		drm_dp_mst_rad_to_str(mstb->rad, mstb->lct, buf, sizeof(buf));  in drm_dp_send_link_address()
3008 		ret = drm_dp_mst_handle_link_address_port(mstb, mgr->dev,  in drm_dp_send_link_address()
3022 	list_for_each_entry_safe(port, tmp, &mstb->ports, next) {  in drm_dp_send_link_address()
3036 		mstb->link_address_sent = false;  in drm_dp_send_link_address()
3043 				   struct drm_dp_mst_branch *mstb)  in drm_dp_send_clear_payload_id_table()  argument
3052 	txmsg->dst = mstb;  in drm_dp_send_clear_payload_id_table()
3057 	ret = drm_dp_mst_wait_tx_reply(mstb, txmsg);  in drm_dp_send_clear_payload_id_table()
3066 				struct drm_dp_mst_branch *mstb,  in drm_dp_send_enum_path_resources()  argument
3077 	txmsg->dst = mstb;  in drm_dp_send_enum_path_resources()
3082 	ret = drm_dp_mst_wait_tx_reply(mstb, txmsg);  in drm_dp_send_enum_path_resources()
3115 …atic struct drm_dp_mst_port *drm_dp_get_last_connected_port_to_mstb(struct drm_dp_mst_branch *mstb)  in drm_dp_get_last_connected_port_to_mstb()  argument
3117 	if (!mstb->port_parent)  in drm_dp_get_last_connected_port_to_mstb()
3120 	if (mstb->port_parent->mstb != mstb)  in drm_dp_get_last_connected_port_to_mstb()
3121 		return mstb->port_parent;  in drm_dp_get_last_connected_port_to_mstb()
3123 	return drm_dp_get_last_connected_port_to_mstb(mstb->port_parent->parent);  in drm_dp_get_last_connected_port_to_mstb()
3136 					struct drm_dp_mst_branch *mstb,  in drm_dp_get_last_connected_port_and_mstb()  argument
3147 		found_port = drm_dp_get_last_connected_port_to_mstb(mstb);  in drm_dp_get_last_connected_port_and_mstb()
3156 			mstb = found_port->parent;  in drm_dp_get_last_connected_port_and_mstb()
3170 	struct drm_dp_mst_branch *mstb;  in drm_dp_payload_send_msg()  local
3176 	mstb = drm_dp_mst_topology_get_mstb_validated(mgr, port->parent);  in drm_dp_payload_send_msg()
3177 	if (!mstb) {  in drm_dp_payload_send_msg()
3178 		mstb = drm_dp_get_last_connected_port_and_mstb(mgr,  in drm_dp_payload_send_msg()
3182 		if (!mstb)  in drm_dp_payload_send_msg()
3195 	txmsg->dst = mstb;  in drm_dp_payload_send_msg()
3210 	ret = drm_dp_mst_wait_tx_reply(mstb, txmsg);  in drm_dp_payload_send_msg()
3219 	drm_dp_mst_topology_put_mstb(mstb);  in drm_dp_payload_send_msg()
3517 	struct drm_dp_mst_branch *mstb;  in drm_dp_send_dpcd_read()  local
3519 	mstb = drm_dp_mst_topology_get_mstb_validated(mgr, port->parent);  in drm_dp_send_dpcd_read()
3520 	if (!mstb)  in drm_dp_send_dpcd_read()
3534 	ret = drm_dp_mst_wait_tx_reply(mstb, txmsg);  in drm_dp_send_dpcd_read()
3541 			  mstb, port->port_num, offset, size);  in drm_dp_send_dpcd_read()
3558 	drm_dp_mst_topology_put_mstb(mstb);  in drm_dp_send_dpcd_read()
3569 	struct drm_dp_mst_branch *mstb;  in drm_dp_send_dpcd_write()  local
3571 	mstb = drm_dp_mst_topology_get_mstb_validated(mgr, port->parent);  in drm_dp_send_dpcd_write()
3572 	if (!mstb)  in drm_dp_send_dpcd_write()
3582 	txmsg->dst = mstb;  in drm_dp_send_dpcd_write()
3586 	ret = drm_dp_mst_wait_tx_reply(mstb, txmsg);  in drm_dp_send_dpcd_write()
3596 	drm_dp_mst_topology_put_mstb(mstb);  in drm_dp_send_dpcd_write()
3611 				    struct drm_dp_mst_branch *mstb,  in drm_dp_send_up_ack_reply()  argument
3620 	txmsg->dst = mstb;  in drm_dp_send_up_ack_reply()
3674 	struct drm_dp_mst_branch *mstb = NULL;  in drm_dp_mst_topology_mgr_set_mst()  local
3703 		mstb = drm_dp_add_mst_branch_device(1, NULL);  in drm_dp_mst_topology_mgr_set_mst()
3704 		if (mstb == NULL) {  in drm_dp_mst_topology_mgr_set_mst()
3708 		mstb->mgr = mgr;  in drm_dp_mst_topology_mgr_set_mst()
3711 		mgr->mst_primary = mstb;  in drm_dp_mst_topology_mgr_set_mst()
3730 		mstb = mgr->mst_primary;  in drm_dp_mst_topology_mgr_set_mst()
3748 	if (mstb)  in drm_dp_mst_topology_mgr_set_mst()
3749 		drm_dp_mst_topology_put_mstb(mstb);  in drm_dp_mst_topology_mgr_set_mst()
3756 drm_dp_mst_topology_mgr_invalidate_mstb(struct drm_dp_mst_branch *mstb)  in drm_dp_mst_topology_mgr_invalidate_mstb()  argument
3761 	mstb->link_address_sent = false;  in drm_dp_mst_topology_mgr_invalidate_mstb()
3763 	list_for_each_entry(port, &mstb->ports, next)  in drm_dp_mst_topology_mgr_invalidate_mstb()
3764 		if (port->mstb)  in drm_dp_mst_topology_mgr_invalidate_mstb()
3765 			drm_dp_mst_topology_mgr_invalidate_mstb(port->mstb);  in drm_dp_mst_topology_mgr_invalidate_mstb()
3874 		      struct drm_dp_mst_branch **mstb)  in drm_dp_get_one_sb_msg()  argument
3888 		*mstb = NULL;  in drm_dp_get_one_sb_msg()
3907 		*mstb = drm_dp_get_mst_branch_device(mgr, hdr.lct, hdr.rad);  in drm_dp_get_one_sb_msg()
3908 		if (!*mstb) {  in drm_dp_get_one_sb_msg()
3955 	struct drm_dp_mst_branch *mstb = NULL;  in drm_dp_mst_handle_down_rep()  local
3958 	if (!drm_dp_get_one_sb_msg(mgr, false, &mstb))  in drm_dp_mst_handle_down_rep()
3972 	if (!txmsg || txmsg->dst != mstb) {  in drm_dp_mst_handle_down_rep()
3977 			      mstb, hdr->seqno, hdr->lct, hdr->rad[0],  in drm_dp_mst_handle_down_rep()
3994 	drm_dp_mst_topology_put_mstb(mstb);  in drm_dp_mst_handle_down_rep()
4008 	if (mstb)  in drm_dp_mst_handle_down_rep()
4009 		drm_dp_mst_topology_put_mstb(mstb);  in drm_dp_mst_handle_down_rep()
4018 	struct drm_dp_mst_branch *mstb = NULL;  in drm_dp_mst_process_up_req()  local
4032 			mstb = drm_dp_get_mst_branch_device_by_guid(mgr, guid);  in drm_dp_mst_process_up_req()
4034 		mstb = drm_dp_get_mst_branch_device(mgr, hdr->lct, hdr->rad);  in drm_dp_mst_process_up_req()
4037 	if (!mstb) {  in drm_dp_mst_process_up_req()
4045 		drm_dp_mst_handle_conn_stat(mstb, &msg->u.conn_stat);  in drm_dp_mst_process_up_req()
4049 	drm_dp_mst_topology_put_mstb(mstb);  in drm_dp_mst_process_up_req()
4713 				 struct drm_dp_mst_branch *mstb)  in drm_dp_mst_dump_mstb()  argument
4716 	int tabs = mstb->lct;  in drm_dp_mst_dump_mstb()
4724 	seq_printf(m, "%smst: %p, %d\n", prefix, mstb, mstb->num_ports);  in drm_dp_mst_dump_mstb()
4725 	list_for_each_entry(port, &mstb->ports, next) {  in drm_dp_mst_dump_mstb()
4727 		if (port->mstb)  in drm_dp_mst_dump_mstb()
4728 			drm_dp_mst_dump_mstb(m, port->mstb);  in drm_dp_mst_dump_mstb()
4878 drm_dp_delayed_destroy_mstb(struct drm_dp_mst_branch *mstb)  in drm_dp_delayed_destroy_mstb()  argument
4880 	struct drm_dp_mst_topology_mgr *mgr = mstb->mgr;  in drm_dp_delayed_destroy_mstb()
4886 	list_for_each_entry_safe(port, port_tmp, &mstb->ports, next) {  in drm_dp_delayed_destroy_mstb()
4893 	mutex_lock(&mstb->mgr->qlock);  in drm_dp_delayed_destroy_mstb()
4895 		if (txmsg->dst != mstb)  in drm_dp_delayed_destroy_mstb()
4902 	mutex_unlock(&mstb->mgr->qlock);  in drm_dp_delayed_destroy_mstb()
4905 		wake_up_all(&mstb->mgr->tx_waitq);  in drm_dp_delayed_destroy_mstb()
4907 	drm_dp_mst_put_mstb_malloc(mstb);  in drm_dp_delayed_destroy_mstb()
4926 			struct drm_dp_mst_branch *mstb;  in drm_dp_delayed_destroy_work()  local
4929 			mstb = list_first_entry_or_null(&mgr->destroy_branch_device_list,  in drm_dp_delayed_destroy_work()
4932 			if (mstb)  in drm_dp_delayed_destroy_work()
4933 				list_del(&mstb->destroy_next);  in drm_dp_delayed_destroy_work()
4936 			if (!mstb)  in drm_dp_delayed_destroy_work()
4939 			drm_dp_delayed_destroy_mstb(mstb);  in drm_dp_delayed_destroy_work()
5044 drm_dp_mst_atomic_check_mstb_bw_limit(struct drm_dp_mst_branch *mstb,  in drm_dp_mst_atomic_check_mstb_bw_limit()  argument
5057 		    !drm_dp_mst_port_downstream_of_branch(vcpi->port, mstb))  in drm_dp_mst_atomic_check_mstb_bw_limit()
5066 	if (mstb->port_parent)  in drm_dp_mst_atomic_check_mstb_bw_limit()
5068 				 mstb->port_parent->parent, mstb->port_parent,  in drm_dp_mst_atomic_check_mstb_bw_limit()
5069 				 mstb);  in drm_dp_mst_atomic_check_mstb_bw_limit()
5072 				 mstb);  in drm_dp_mst_atomic_check_mstb_bw_limit()
5074 	list_for_each_entry(port, &mstb->ports, next) {  in drm_dp_mst_atomic_check_mstb_bw_limit()
5118 		pbn_used = drm_dp_mst_atomic_check_mstb_bw_limit(port->mstb,  in drm_dp_mst_atomic_check_port_bw_limit()
5517 static int drm_dp_mst_i2c_read(struct drm_dp_mst_branch *mstb,  in drm_dp_mst_i2c_read()  argument
5546 	txmsg->dst = mstb;  in drm_dp_mst_i2c_read()
5551 	ret = drm_dp_mst_wait_tx_reply(mstb, txmsg);  in drm_dp_mst_i2c_read()
5570 static int drm_dp_mst_i2c_write(struct drm_dp_mst_branch *mstb,  in drm_dp_mst_i2c_write()  argument
5594 		txmsg->dst = mstb;  in drm_dp_mst_i2c_write()
5599 		ret = drm_dp_mst_wait_tx_reply(mstb, txmsg);  in drm_dp_mst_i2c_write()
5622 	struct drm_dp_mst_branch *mstb;  in drm_dp_mst_i2c_xfer()  local
5626 	mstb = drm_dp_mst_topology_get_mstb_validated(mgr, port->parent);  in drm_dp_mst_i2c_xfer()
5627 	if (!mstb)  in drm_dp_mst_i2c_xfer()
5631 		ret = drm_dp_mst_i2c_read(mstb, port, msgs, num);  in drm_dp_mst_i2c_xfer()
5633 		ret = drm_dp_mst_i2c_write(mstb, port, msgs, num);  in drm_dp_mst_i2c_xfer()
5639 	drm_dp_mst_topology_put_mstb(mstb);  in drm_dp_mst_i2c_xfer()
5728 	    port->mstb &&  in drm_dp_mst_is_virtual_dpcd()
5729 	    port->mstb->num_ports == 2) {  in drm_dp_mst_is_virtual_dpcd()
5730 		list_for_each_entry(downstream_port, &port->mstb->ports, next) {  in drm_dp_mst_is_virtual_dpcd()