NVWriteVgaGr
NVWriteVgaGr(dev, 0, NV_VIO_GX_READ_MAP_INDEX, plane);
NVWriteVgaGr(dev, 0, NV_VIO_GX_MODE_INDEX, 0x0);
NVWriteVgaGr(dev, 0, NV_VIO_GX_MISC_INDEX, 0x5);
NVWriteVgaGr(dev, 0, NV_VIO_GX_READ_MAP_INDEX, gr4);
NVWriteVgaGr(dev, 0, NV_VIO_GX_MODE_INDEX, gr5);
NVWriteVgaGr(dev, 0, NV_VIO_GX_MISC_INDEX, gr6);
NVWriteVgaGr(dev, head, i, regp->Graphics[i]);
void NVWriteVgaGr(struct drm_device *, int head, uint8_t index, uint8_t value);