I can confirm that 0x2A and 0x2B has no effect on this hardware, so partial mode will not work. But I did manage to patch the driver and make direct mode work in the following PR. I am using it for my project which has no rotation (so I did not test for sw rotations, it might require additional patch). Before this I was using full refresh and had 4-8fps, now I get 22-30fps with direct mode.