As I said before, the dma_fill function is based on dma_copy and I tried to
keep the diff small. But you are right, this could be improved.

> Have you created a patch to get these functions called in place of the
> currently broken code?

I did but I was missing the context that is needed to call the dma_fill
function.
You can try Marek's patches on the mailing list, they work well for me.

You can try to replace the call to util_blitter_clear_buffer with the dma_fill
version if you are interested in it. But I don't think that you will see any
noticeable difference (given the assumtion that the dma version works).