I2S_PCM_LOOPBACK_CH_MASK  942 sound/soc/mediatek/mt6797/mt6797-reg.h #define I2S_PCM_LOOPBACK_CH_MASK                            0x1
I2S_PCM_LOOPBACK_CH_MASK  960 sound/soc/mediatek/mt8183/mt8183-reg.h #define I2S_PCM_LOOPBACK_CH_MASK                      0x3