PCM_SERIAL_LOOPBACK_MASK_SFT  851 sound/soc/mediatek/mt6797/mt6797-reg.h #define PCM_SERIAL_LOOPBACK_MASK_SFT                        (0x1 << 28)
PCM_SERIAL_LOOPBACK_MASK_SFT  866 sound/soc/mediatek/mt8183/mt8183-reg.h #define PCM_SERIAL_LOOPBACK_MASK_SFT                  (0x1 << 28)