video and usb driver (rk3588)

[Michael Grunditz]

> I have a display now and it is really fast! However clipping doesn't
> work as it should. It doesn't crash but it makes graphics a bit blurry
> if active, and so is mouse pointer. There is no speed gain with
> clipping.


Solved! I had "CACHE" as attribute for the dma buffer. I changed to
WRITE_COMBINED now, and it all works!
Thanks to Norman who suggested cache problems.