PCM2_BUFFER_LOOPBACK_MASK  959 sound/soc/mediatek/mt6797/mt6797-reg.h #define PCM2_BUFFER_LOOPBACK_MASK                            0x1
PCM2_BUFFER_LOOPBACK_MASK  974 sound/soc/mediatek/mt8183/mt8183-reg.h #define PCM2_BUFFER_LOOPBACK_MASK                     0x1