sidetoner_mux 877 sound/soc/codecs/wm8993.c static const struct snd_kcontrol_new sidetoner_mux = sidetoner_mux 903 sound/soc/codecs/wm8993.c SND_SOC_DAPM_MUX("DACR Sidetone", SND_SOC_NOPM, 0, 0, &sidetoner_mux),