aif2_loopback_enum 1515 sound/soc/codecs/wm8994.c static SOC_ENUM_SINGLE_DECL(aif2_loopback_enum, aif2_loopback_enum 1521 sound/soc/codecs/wm8994.c SOC_DAPM_ENUM("AIF2 Loopback", aif2_loopback_enum);