BLTCNTL
reg2 = i810_readw(BLTCNTL, mmio) & ~0x30;
i810_writew(BLTCNTL, mmio, reg2);
tmp_word = i810_readw(BLTCNTL, mmio);
i810_writew(BLTCNTL, mmio, tmp_word);
par->hw_state.bltcntl = i810_readw(BLTCNTL, mmio);