snd_mtpav_output_port_write  329 sound/drivers/mtpav.c 	snd_mtpav_output_port_write(mtp_card, portp, substream);
snd_mtpav_output_port_write  422 sound/drivers/mtpav.c 			snd_mtpav_output_port_write(chip, portp, portp->output);