RTSX_SD_VPCLK1_CTL
rtsx_write(sc, RTSX_SD_VPCLK1_CTL, RTSX_PHASE_SELECT_MASK, sample_point);
rtsx_write(sc, RTSX_SD_VPCLK1_CTL, RTSX_PHASE_NOT_RESET, 0);
rtsx_write(sc, RTSX_SD_VPCLK1_CTL, RTSX_PHASE_NOT_RESET, RTSX_PHASE_NOT_RESET);