snd_ctl_elem_value 817 include/sound/asound.h struct snd_ctl_elem_value { snd_ctl_elem_value 854 include/sound/asound.h SNDRV_CTL_IOCTL_ELEM_READ = _IOWR('U', 0x12, struct snd_ctl_elem_value), snd_ctl_elem_value 855 include/sound/asound.h SNDRV_CTL_IOCTL_ELEM_WRITE = _IOWR('U', 0x13, struct snd_ctl_elem_value),