179 	int err;  in drm_dp_dpcd_access()  local
196 		err = aux->transfer(aux, &msg);  in drm_dp_dpcd_access()
198 		if (err < 0) {  in drm_dp_dpcd_access()
199 			if (err == -EBUSY)  in drm_dp_dpcd_access()
202 			return err;  in drm_dp_dpcd_access()
208 			if (err < size)  in drm_dp_dpcd_access()
210 			return err;  in drm_dp_dpcd_access()
299 	int err;  in drm_dp_link_probe()  local
303 	err = drm_dp_dpcd_read(aux, DP_DPCD_REV, values, sizeof(values));  in drm_dp_link_probe()
304 	if (err < 0)  in drm_dp_link_probe()
305 		return err;  in drm_dp_link_probe()
328 	int err;  in drm_dp_link_power_up()  local
334 	err = drm_dp_dpcd_readb(aux, DP_SET_POWER, &value);  in drm_dp_link_power_up()
335 	if (err < 0)  in drm_dp_link_power_up()
336 		return err;  in drm_dp_link_power_up()
341 	err = drm_dp_dpcd_writeb(aux, DP_SET_POWER, value);  in drm_dp_link_power_up()
342 	if (err < 0)  in drm_dp_link_power_up()
343 		return err;  in drm_dp_link_power_up()
366 	int err;  in drm_dp_link_power_down()  local
372 	err = drm_dp_dpcd_readb(aux, DP_SET_POWER, &value);  in drm_dp_link_power_down()
373 	if (err < 0)  in drm_dp_link_power_down()
374 		return err;  in drm_dp_link_power_down()
379 	err = drm_dp_dpcd_writeb(aux, DP_SET_POWER, value);  in drm_dp_link_power_down()
380 	if (err < 0)  in drm_dp_link_power_down()
381 		return err;  in drm_dp_link_power_down()
397 	int err;  in drm_dp_link_configure()  local
405 	err = drm_dp_dpcd_write(aux, DP_LINK_BW_SET, values, sizeof(values));  in drm_dp_link_configure()
406 	if (err < 0)  in drm_dp_link_configure()
407 		return err;  in drm_dp_link_configure()
523 	int err, ret = orig_msg->size;  in drm_dp_i2c_drain_msg()  local
527 		err = drm_dp_i2c_do_msg(aux, &msg);  in drm_dp_i2c_drain_msg()
528 		if (err <= 0)  in drm_dp_i2c_drain_msg()
529 			return err == 0 ? -EPROTO : err;  in drm_dp_i2c_drain_msg()
531 		if (err < msg.size && err < ret) {  in drm_dp_i2c_drain_msg()
533 				      msg.size, err);  in drm_dp_i2c_drain_msg()
534 			ret = err;  in drm_dp_i2c_drain_msg()
537 		msg.size -= err;  in drm_dp_i2c_drain_msg()
538 		msg.buffer += err;  in drm_dp_i2c_drain_msg()
561 	int err = 0;  in drm_dp_i2c_xfer()  local
579 		err = drm_dp_i2c_do_msg(aux, &msg);  in drm_dp_i2c_xfer()
580 		if (err < 0)  in drm_dp_i2c_xfer()
591 			err = drm_dp_i2c_drain_msg(aux, &msg);  in drm_dp_i2c_xfer()
592 			if (err < 0)  in drm_dp_i2c_xfer()
594 			transfer_size = err;  in drm_dp_i2c_xfer()
596 		if (err < 0)  in drm_dp_i2c_xfer()
599 	if (err >= 0)  in drm_dp_i2c_xfer()
600 		err = num;  in drm_dp_i2c_xfer()
610 	return err;  in drm_dp_i2c_xfer()