NVIF_OUTP_ACQUIRE_V0_PIOR
ret = nvif_outp_acquire(outp, NVIF_OUTP_ACQUIRE_V0_PIOR, &args);
if (outp->ior && args->v0.type <= NVIF_OUTP_ACQUIRE_V0_PIOR)
case NVIF_OUTP_ACQUIRE_V0_PIOR: