PUNIT_REG_PWRGT_STATUS
val = vlv_punit_read(display->drm, PUNIT_REG_PWRGT_STATUS);
ret = poll_timeout_us(val = vlv_punit_read(display->drm, PUNIT_REG_PWRGT_STATUS),
state = vlv_punit_read(display->drm, PUNIT_REG_PWRGT_STATUS) & mask;