WM8711_APDIGI
u16 mute_reg = snd_soc_component_read(component, WM8711_APDIGI) & 0xfff7;
snd_soc_component_write(component, WM8711_APDIGI, mute_reg | 0x8);
snd_soc_component_write(component, WM8711_APDIGI, mute_reg);