taw at bitwiz.org.uk
Wed May 6 18:38:47 CEST 2009
On Wed, 06 May 2009 14:13:28 +0200
Lars-Peter Clausen <lars at metafoo.de> wrote:
> In my opinion instead of exa we should use uxa which is exa without
> memory management. And thats also whats intel is using now.
Hmm, I haven't looked too closely at UXA yet, but I didn't think UXA would
give us any advantages over EXA+pixmap creation hooks...?
> And another question is do you know if it's possible to tell the s3c
> to do a dma transfer of the cmdq buffer in the background instead of
> iowriting it and blocking the cpu?
I think it's probably more worth worrying about the speed of getting data
in/out of the chip, rather than the command sequences themselves. But
in either case, sadly, DMA doesn't result in any improvement. See this
thread, which goes into a lot of detail about what happens:
JPEG data uploads, anyone? >:->
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