TPACPI_BRGHT_MODE_ECNVRAM
if (brightness_mode != TPACPI_BRGHT_MODE_ECNVRAM)
case TPACPI_BRGHT_MODE_ECNVRAM:
case TPACPI_BRGHT_MODE_ECNVRAM:
brightness_mode = TPACPI_BRGHT_MODE_ECNVRAM;
(brightness_mode == TPACPI_BRGHT_MODE_ECNVRAM ||