DAI_PCM_LOOPBACK_CH_MASK  939 sound/soc/mediatek/mt6797/mt6797-reg.h #define DAI_PCM_LOOPBACK_CH_MASK                            0x1
DAI_PCM_LOOPBACK_CH_MASK  957 sound/soc/mediatek/mt8183/mt8183-reg.h #define DAI_PCM_LOOPBACK_CH_MASK                      0x3