NV04_PGRAPH_CTX_CONTROL
if (nvkm_rd32(device, NV04_PGRAPH_CTX_CONTROL) & 0x00010000) {
nvkm_wr32(device, NV04_PGRAPH_CTX_CONTROL, 0x10010100);
nvkm_wr32(device, NV04_PGRAPH_CTX_CONTROL, 0x10000000);
nvkm_wr32(device, NV04_PGRAPH_CTX_CONTROL , 0x10000100);