[Bug 18397] Small pixmap corruption [EXA enabled]

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Tue Sep 1 09:51:40 PDT 2009


--- Comment #73 from Alex Deucher <agd5f at yahoo.com>  2009-09-01 09:51:39 PST ---
(In reply to comment #71)
> (In reply to comment #69)
> > Created an attachment (id=28899)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=28899) [details] [details]
> > patch for pre-r6xx chips
> > 
> > This seems to fix the DFS issues for me on my problematic r5xx card. Basically
> > for small xfers we do the blit twice to make sure it's hit memory.
> Hmm I don't like the idea. Surely there must be some way to correctly determine
> the blit has really completed?
> Otherwise, isn't actually the size (so something like width * height * bpp)
> rather than width or height relevant for this?

Yes, the size is relevant.  There's apparently some threshold for the write
combiner in the bus interface.

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