MUTE_ON
u8 ldac_reg = snd_soc_component_read(component, LDAC_VOL) & ~MUTE_ON;
u8 rdac_reg = snd_soc_component_read(component, RDAC_VOL) & ~MUTE_ON;
snd_soc_component_write(component, LDAC_VOL, ldac_reg | MUTE_ON);
snd_soc_component_write(component, RDAC_VOL, rdac_reg | MUTE_ON);
snd_soc_component_write(component, LDAC_VOL, DEFAULT_VOL | MUTE_ON);
snd_soc_component_write(component, RDAC_VOL, DEFAULT_VOL | MUTE_ON);