688 				const struct drm_dp_sideband_msg_tx *txmsg)  in drm_dp_mst_dump_sideband_msg_tx()  argument
695 	drm_dp_mst_rad_to_str(txmsg->dst->rad, txmsg->dst->lct, buf,  in drm_dp_mst_dump_sideband_msg_tx()
698 		   txmsg->cur_offset, txmsg->cur_len, txmsg->seqno,  in drm_dp_mst_dump_sideband_msg_tx()
699 		   drm_dp_mst_sideband_tx_state_str(txmsg->state),  in drm_dp_mst_dump_sideband_msg_tx()
700 		   txmsg->path_msg, buf);  in drm_dp_mst_dump_sideband_msg_tx()
702 	ret = drm_dp_decode_sideband_req(txmsg, &req);  in drm_dp_mst_dump_sideband_msg_tx()
1238 			      struct drm_dp_sideband_msg_tx *txmsg)  in check_txmsg_state()  argument
1247 	state = READ_ONCE(txmsg->state);  in check_txmsg_state()
1253 				    struct drm_dp_sideband_msg_tx *txmsg)  in drm_dp_mst_wait_tx_reply()  argument
1275 					 check_txmsg_state(mgr, txmsg),  in drm_dp_mst_wait_tx_reply()
1289 		if (txmsg->state == DRM_DP_SIDEBAND_TX_TIMEOUT) {  in drm_dp_mst_wait_tx_reply()
1295 			    txmsg, txmsg->state, txmsg->seqno);  in drm_dp_mst_wait_tx_reply()
1301 		if (txmsg->state == DRM_DP_SIDEBAND_TX_QUEUED ||  in drm_dp_mst_wait_tx_reply()
1302 		    txmsg->state == DRM_DP_SIDEBAND_TX_START_SEND ||  in drm_dp_mst_wait_tx_reply()
1303 		    txmsg->state == DRM_DP_SIDEBAND_TX_SENT)  in drm_dp_mst_wait_tx_reply()
1304 			list_del(&txmsg->next);  in drm_dp_mst_wait_tx_reply()
1310 		drm_dp_mst_dump_sideband_msg_tx(&p, txmsg);  in drm_dp_mst_wait_tx_reply()
2753 				  struct drm_dp_sideband_msg_tx *txmsg)  in set_hdr_from_dst_qlock()  argument
2755 	struct drm_dp_mst_branch *mstb = txmsg->dst;  in set_hdr_from_dst_qlock()
2758 	req_type = txmsg->msg[0] & 0x7f;  in set_hdr_from_dst_qlock()
2765 	hdr->path_msg = txmsg->path_msg;  in set_hdr_from_dst_qlock()
2782 				   struct drm_dp_sideband_msg_tx *txmsg,  in process_single_tx_qlock()  argument
2790 	if (txmsg->state == DRM_DP_SIDEBAND_TX_SENT)  in process_single_tx_qlock()
2795 	if (txmsg->state == DRM_DP_SIDEBAND_TX_QUEUED)  in process_single_tx_qlock()
2796 		txmsg->state = DRM_DP_SIDEBAND_TX_START_SEND;  in process_single_tx_qlock()
2799 	ret = set_hdr_from_dst_qlock(&hdr, txmsg);  in process_single_tx_qlock()
2804 	len = txmsg->cur_len - txmsg->cur_offset;  in process_single_tx_qlock()
2810 	if (len == txmsg->cur_len)  in process_single_tx_qlock()
2818 	memcpy(&chunk[idx], &txmsg->msg[txmsg->cur_offset], tosend);  in process_single_tx_qlock()
2829 			drm_dp_mst_dump_sideband_msg_tx(&p, txmsg);  in process_single_tx_qlock()
2834 	txmsg->cur_offset += tosend;  in process_single_tx_qlock()
2835 	if (txmsg->cur_offset == txmsg->cur_len) {  in process_single_tx_qlock()
2836 		txmsg->state = DRM_DP_SIDEBAND_TX_SENT;  in process_single_tx_qlock()
2844 	struct drm_dp_sideband_msg_tx *txmsg;  in process_single_down_tx_qlock()  local
2853 	txmsg = list_first_entry(&mgr->tx_msg_downq,  in process_single_down_tx_qlock()
2855 	ret = process_single_tx_qlock(mgr, txmsg, false);  in process_single_down_tx_qlock()
2858 		list_del(&txmsg->next);  in process_single_down_tx_qlock()
2859 		txmsg->state = DRM_DP_SIDEBAND_TX_TIMEOUT;  in process_single_down_tx_qlock()
2865 				 struct drm_dp_sideband_msg_tx *txmsg)  in drm_dp_queue_down_tx()  argument
2868 	list_add_tail(&txmsg->next, &mgr->tx_msg_downq);  in drm_dp_queue_down_tx()
2873 		drm_dp_mst_dump_sideband_msg_tx(&p, txmsg);  in drm_dp_queue_down_tx()
2908 	struct drm_dp_sideband_msg_tx *txmsg;  in drm_dp_send_link_address()  local
2914 	txmsg = kzalloc(sizeof(*txmsg), GFP_KERNEL);  in drm_dp_send_link_address()
2915 	if (!txmsg)  in drm_dp_send_link_address()
2918 	txmsg->dst = mstb;  in drm_dp_send_link_address()
2919 	build_link_address(txmsg);  in drm_dp_send_link_address()
2922 	drm_dp_queue_down_tx(mgr, txmsg);  in drm_dp_send_link_address()
2925 	ret = drm_dp_mst_wait_tx_reply(mstb, txmsg);  in drm_dp_send_link_address()
2930 	if (txmsg->reply.reply_type == DP_SIDEBAND_REPLY_NAK) {  in drm_dp_send_link_address()
2936 	reply = &txmsg->reply.u.link_addr;  in drm_dp_send_link_address()
2980 	kfree(txmsg);  in drm_dp_send_link_address()
2988 	struct drm_dp_sideband_msg_tx *txmsg;  in drm_dp_send_clear_payload_id_table()  local
2991 	txmsg = kzalloc(sizeof(*txmsg), GFP_KERNEL);  in drm_dp_send_clear_payload_id_table()
2992 	if (!txmsg)  in drm_dp_send_clear_payload_id_table()
2995 	txmsg->dst = mstb;  in drm_dp_send_clear_payload_id_table()
2996 	build_clear_payload_id_table(txmsg);  in drm_dp_send_clear_payload_id_table()
2998 	drm_dp_queue_down_tx(mgr, txmsg);  in drm_dp_send_clear_payload_id_table()
3000 	ret = drm_dp_mst_wait_tx_reply(mstb, txmsg);  in drm_dp_send_clear_payload_id_table()
3001 	if (ret > 0 && txmsg->reply.reply_type == DP_SIDEBAND_REPLY_NAK)  in drm_dp_send_clear_payload_id_table()
3004 	kfree(txmsg);  in drm_dp_send_clear_payload_id_table()
3013 	struct drm_dp_sideband_msg_tx *txmsg;  in drm_dp_send_enum_path_resources()  local
3016 	txmsg = kzalloc(sizeof(*txmsg), GFP_KERNEL);  in drm_dp_send_enum_path_resources()
3017 	if (!txmsg)  in drm_dp_send_enum_path_resources()
3020 	txmsg->dst = mstb;  in drm_dp_send_enum_path_resources()
3021 	build_enum_path_resources(txmsg, port->port_num);  in drm_dp_send_enum_path_resources()
3023 	drm_dp_queue_down_tx(mgr, txmsg);  in drm_dp_send_enum_path_resources()
3025 	ret = drm_dp_mst_wait_tx_reply(mstb, txmsg);  in drm_dp_send_enum_path_resources()
3028 		path_res = &txmsg->reply.u.path_resources;  in drm_dp_send_enum_path_resources()
3030 		if (txmsg->reply.reply_type == DP_SIDEBAND_REPLY_NAK) {  in drm_dp_send_enum_path_resources()
3054 	kfree(txmsg);  in drm_dp_send_enum_path_resources()
3112 	struct drm_dp_sideband_msg_tx *txmsg;  in drm_dp_payload_send_msg()  local
3129 	txmsg = kzalloc(sizeof(*txmsg), GFP_KERNEL);  in drm_dp_payload_send_msg()
3130 	if (!txmsg) {  in drm_dp_payload_send_msg()
3138 	txmsg->dst = mstb;  in drm_dp_payload_send_msg()
3139 	build_allocate_payload(txmsg, port_num,  in drm_dp_payload_send_msg()
3143 	drm_dp_queue_down_tx(mgr, txmsg);  in drm_dp_payload_send_msg()
3153 	ret = drm_dp_mst_wait_tx_reply(mstb, txmsg);  in drm_dp_payload_send_msg()
3155 		if (txmsg->reply.reply_type == DP_SIDEBAND_REPLY_NAK)  in drm_dp_payload_send_msg()
3160 	kfree(txmsg);  in drm_dp_payload_send_msg()
3169 	struct drm_dp_sideband_msg_tx *txmsg;  in drm_dp_send_power_updown_phy()  local
3176 	txmsg = kzalloc(sizeof(*txmsg), GFP_KERNEL);  in drm_dp_send_power_updown_phy()
3177 	if (!txmsg) {  in drm_dp_send_power_updown_phy()
3182 	txmsg->dst = port->parent;  in drm_dp_send_power_updown_phy()
3183 	build_power_updown_phy(txmsg, port->port_num, power_up);  in drm_dp_send_power_updown_phy()
3184 	drm_dp_queue_down_tx(mgr, txmsg);  in drm_dp_send_power_updown_phy()
3186 	ret = drm_dp_mst_wait_tx_reply(port->parent, txmsg);  in drm_dp_send_power_updown_phy()
3188 		if (txmsg->reply.reply_type == DP_SIDEBAND_REPLY_NAK)  in drm_dp_send_power_updown_phy()
3193 	kfree(txmsg);  in drm_dp_send_power_updown_phy()
3206 	struct drm_dp_sideband_msg_tx *txmsg;  in drm_dp_send_query_stream_enc_status()  local
3210 	txmsg = kzalloc(sizeof(*txmsg), GFP_KERNEL);  in drm_dp_send_query_stream_enc_status()
3211 	if (!txmsg)  in drm_dp_send_query_stream_enc_status()
3231 	txmsg->dst = mgr->mst_primary;  in drm_dp_send_query_stream_enc_status()
3233 	build_query_stream_enc_status(txmsg, payload->vcpi, nonce);  in drm_dp_send_query_stream_enc_status()
3235 	drm_dp_queue_down_tx(mgr, txmsg);  in drm_dp_send_query_stream_enc_status()
3237 	ret = drm_dp_mst_wait_tx_reply(mgr->mst_primary, txmsg);  in drm_dp_send_query_stream_enc_status()
3240 	} else if (txmsg->reply.reply_type == DP_SIDEBAND_REPLY_NAK) {  in drm_dp_send_query_stream_enc_status()
3247 	memcpy(status, &txmsg->reply.u.enc_status, sizeof(*status));  in drm_dp_send_query_stream_enc_status()
3253 	kfree(txmsg);  in drm_dp_send_query_stream_enc_status()
3431 	struct drm_dp_sideband_msg_tx *txmsg;  in drm_dp_send_dpcd_read()  local
3438 	txmsg = kzalloc(sizeof(*txmsg), GFP_KERNEL);  in drm_dp_send_dpcd_read()
3439 	if (!txmsg) {  in drm_dp_send_dpcd_read()
3444 	build_dpcd_read(txmsg, port->port_num, offset, size);  in drm_dp_send_dpcd_read()
3445 	txmsg->dst = port->parent;  in drm_dp_send_dpcd_read()
3447 	drm_dp_queue_down_tx(mgr, txmsg);  in drm_dp_send_dpcd_read()
3449 	ret = drm_dp_mst_wait_tx_reply(mstb, txmsg);  in drm_dp_send_dpcd_read()
3453 	if (txmsg->reply.reply_type == 1) {  in drm_dp_send_dpcd_read()
3460 	if (txmsg->reply.u.remote_dpcd_read_ack.num_bytes != size) {  in drm_dp_send_dpcd_read()
3465 	ret = min_t(size_t, txmsg->reply.u.remote_dpcd_read_ack.num_bytes,  in drm_dp_send_dpcd_read()
3467 	memcpy(bytes, txmsg->reply.u.remote_dpcd_read_ack.bytes, ret);  in drm_dp_send_dpcd_read()
3470 	kfree(txmsg);  in drm_dp_send_dpcd_read()
3482 	struct drm_dp_sideband_msg_tx *txmsg;  in drm_dp_send_dpcd_write()  local
3489 	txmsg = kzalloc(sizeof(*txmsg), GFP_KERNEL);  in drm_dp_send_dpcd_write()
3490 	if (!txmsg) {  in drm_dp_send_dpcd_write()
3495 	build_dpcd_write(txmsg, port->port_num, offset, size, bytes);  in drm_dp_send_dpcd_write()
3496 	txmsg->dst = mstb;  in drm_dp_send_dpcd_write()
3498 	drm_dp_queue_down_tx(mgr, txmsg);  in drm_dp_send_dpcd_write()
3500 	ret = drm_dp_mst_wait_tx_reply(mstb, txmsg);  in drm_dp_send_dpcd_write()
3502 		if (txmsg->reply.reply_type == DP_SIDEBAND_REPLY_NAK)  in drm_dp_send_dpcd_write()
3508 	kfree(txmsg);  in drm_dp_send_dpcd_write()
3528 	struct drm_dp_sideband_msg_tx *txmsg;  in drm_dp_send_up_ack_reply()  local
3530 	txmsg = kzalloc(sizeof(*txmsg), GFP_KERNEL);  in drm_dp_send_up_ack_reply()
3531 	if (!txmsg)  in drm_dp_send_up_ack_reply()
3534 	txmsg->dst = mstb;  in drm_dp_send_up_ack_reply()
3535 	drm_dp_encode_up_ack_reply(txmsg, req_type);  in drm_dp_send_up_ack_reply()
3539 	process_single_tx_qlock(mgr, txmsg, true);  in drm_dp_send_up_ack_reply()
3542 	kfree(txmsg);  in drm_dp_send_up_ack_reply()
3864 	struct drm_dp_sideband_msg_tx *txmsg;  in drm_dp_mst_handle_down_rep()  local
3877 	txmsg = list_first_entry_or_null(&mgr->tx_msg_downq,  in drm_dp_mst_handle_down_rep()
3882 	if (!txmsg || txmsg->dst != mstb) {  in drm_dp_mst_handle_down_rep()
3891 	drm_dp_sideband_parse_reply(mgr, msg, &txmsg->reply);  in drm_dp_mst_handle_down_rep()
3893 	if (txmsg->reply.reply_type == DP_SIDEBAND_REPLY_NAK) {  in drm_dp_mst_handle_down_rep()
3896 			    txmsg->reply.req_type,  in drm_dp_mst_handle_down_rep()
3897 			    drm_dp_mst_req_type_str(txmsg->reply.req_type),  in drm_dp_mst_handle_down_rep()
3898 			    txmsg->reply.u.nak.reason,  in drm_dp_mst_handle_down_rep()
3899 			    drm_dp_mst_nak_reason_str(txmsg->reply.u.nak.reason),  in drm_dp_mst_handle_down_rep()
3900 			    txmsg->reply.u.nak.nak_data);  in drm_dp_mst_handle_down_rep()
3907 	txmsg->state = DRM_DP_SIDEBAND_TX_RX;  in drm_dp_mst_handle_down_rep()
3908 	list_del(&txmsg->next);  in drm_dp_mst_handle_down_rep()
4116 	struct drm_dp_sideband_msg_tx *txmsg;  in drm_dp_mst_hpd_irq_send_new_request()  local
4120 	txmsg = list_first_entry_or_null(&mgr->tx_msg_downq,  in drm_dp_mst_hpd_irq_send_new_request()
4123 	if (!txmsg ||  in drm_dp_mst_hpd_irq_send_new_request()
4124 	    txmsg->state == DRM_DP_SIDEBAND_TX_START_SEND ||  in drm_dp_mst_hpd_irq_send_new_request()
4125 	    txmsg->state == DRM_DP_SIDEBAND_TX_SENT)  in drm_dp_mst_hpd_irq_send_new_request()
4928 	struct drm_dp_sideband_msg_tx *txmsg, *txmsg_tmp;  in drm_dp_delayed_destroy_mstb()  local
4940 	list_for_each_entry_safe(txmsg, txmsg_tmp, &mgr->tx_msg_downq, next) {  in drm_dp_delayed_destroy_mstb()
4941 		if (txmsg->dst != mstb)  in drm_dp_delayed_destroy_mstb()
4944 		txmsg->state = DRM_DP_SIDEBAND_TX_TIMEOUT;  in drm_dp_delayed_destroy_mstb()
4945 		list_del(&txmsg->next);  in drm_dp_delayed_destroy_mstb()
5613 	struct drm_dp_sideband_msg_tx *txmsg = NULL;  in drm_dp_mst_i2c_read()  local
5629 	txmsg = kzalloc(sizeof(*txmsg), GFP_KERNEL);  in drm_dp_mst_i2c_read()
5630 	if (!txmsg) {  in drm_dp_mst_i2c_read()
5635 	txmsg->dst = mstb;  in drm_dp_mst_i2c_read()
5636 	drm_dp_encode_sideband_req(&msg, txmsg);  in drm_dp_mst_i2c_read()
5638 	drm_dp_queue_down_tx(mgr, txmsg);  in drm_dp_mst_i2c_read()
5640 	ret = drm_dp_mst_wait_tx_reply(mstb, txmsg);  in drm_dp_mst_i2c_read()
5643 		if (txmsg->reply.reply_type == DP_SIDEBAND_REPLY_NAK) {  in drm_dp_mst_i2c_read()
5647 		if (txmsg->reply.u.remote_i2c_read_ack.num_bytes != msgs[num - 1].len) {  in drm_dp_mst_i2c_read()
5651 		memcpy(msgs[num - 1].buf, txmsg->reply.u.remote_i2c_read_ack.bytes, msgs[num - 1].len);  in drm_dp_mst_i2c_read()
5655 	kfree(txmsg);  in drm_dp_mst_i2c_read()
5666 	struct drm_dp_sideband_msg_tx *txmsg = NULL;  in drm_dp_mst_i2c_write()  local
5669 	txmsg = kzalloc(sizeof(*txmsg), GFP_KERNEL);  in drm_dp_mst_i2c_write()
5670 	if (!txmsg) {  in drm_dp_mst_i2c_write()
5682 		memset(txmsg, 0, sizeof(*txmsg));  in drm_dp_mst_i2c_write()
5683 		txmsg->dst = mstb;  in drm_dp_mst_i2c_write()
5685 		drm_dp_encode_sideband_req(&msg, txmsg);  in drm_dp_mst_i2c_write()
5686 		drm_dp_queue_down_tx(mgr, txmsg);  in drm_dp_mst_i2c_write()
5688 		ret = drm_dp_mst_wait_tx_reply(mstb, txmsg);  in drm_dp_mst_i2c_write()
5690 			if (txmsg->reply.reply_type == DP_SIDEBAND_REPLY_NAK) {  in drm_dp_mst_i2c_write()
5700 	kfree(txmsg);  in drm_dp_mst_i2c_write()