nvkm_hwsq_wait
void nvkm_hwsq_wait(struct nvkm_hwsq *, u8 flag, u8 data);
nvkm_hwsq_wait(hwsq, head_sync ? 0x3 : 0x1, 0x0);
nvkm_hwsq_wait(hwsq, head_sync ? 0x3 : 0x1, 0x1);
nvkm_hwsq_wait(ram->hwsq, flag, data);