EXA patches

[Michel Dänzer]

On Tue, 2009-08-04 at 11:54 +1000, Dave Airlie wrote:
> On Tue, 2009-08-04 at 09:49 +0800, Joel Feiner wrote:
> > 2009/8/4 Michel Dänzer <michel at daenzer.net>
> >         <snip>
> >         
> >         I wonder if maybe the slowdown I'm seeing is because the
> >         radeon driver
> >         is temporarily lacking UploadToScreen and DownloadFromScreen
> >         hooks with
> >         KMS, though I'm not sure what those would be used for with
> >         text
> >         rendering.
> > 
> > Off-topic, but if I may enquire out of intellectual curiosity: why
> > doesn't the KMS version of Radeon have UTS and DFS acceleration?
> 
> The code is in the branch, but its really ugly, I was hoping to actual
> do it cleaner which might involve a new kernel interface to ask for the 
> current placement of a buffer object so we can decide whether to just
> memcpy or we need to blit for DFS. I'm not sure I saw a good reason for
> UTS, doing Host data blits isn't really useful with BOs at least with
> the current code.

One potential benefit of UTS is pipelining. But I agree that DFS is
probably more important.


-- 
Earthling Michel Dänzer           |                http://www.vmware.com
Libre software enthusiast         |          Debian, X and DRI developer