IPC_SST_PERIOD_ELAPSED  102 sound/soc/intel/atom/sst-mfld-dsp.h #define IPC_SST_PERIOD_ELAPSED 0x97 /* period elapsed */
IPC_SST_PERIOD_ELAPSED   58 sound/soc/intel/baytrail/sst-baytrail-ipc.c #define IPC_SST_PERIOD_ELAPSED	0x97