Symbol: SND_CTL_SUBDEV_RAWMIDI
sound/core/rawmidi.c
1067
control->preferred_subdevice[SND_CTL_SUBDEV_RAWMIDI] = val;
sound/core/rawmidi.c
484
subdevice = snd_ctl_get_preferred_subdevice(card, SND_CTL_SUBDEV_RAWMIDI);