[PATCH 0/4] fb support for 8bpp bitmaps

[Michel Dänzer]

On Mit, 2014-01-15 at 19:30 -0800, Keith Packard wrote:
> Michel Dänzer <michel at daenzer.net> writes:
> 
> > What's the plan for dealing with GPU tiling in this scheme? Disabling
> > tiling for all textures which could be hit by software fallbacks seems
> > like a bad plan for GPU performance.
> 
> If you can't get the hardware to de-tile, then you can use wfb.

Ugh. Based on my experience with wfb, I wouldn't expect that to perform
better than the current fallback paths in glamor.

BTW, as I reported in
https://bugs.freedesktop.org/show_bug.cgi?id=68524#c27 , accessing the
texture memory in VRAM directly isn't much faster than those either with
a discrete GPU.


So, while I highly applaud the goal of making a glamor based generic
driver generally usable (especially for XWayland), please don't bake in
such platform specific assumptions then.


-- 
Earthling Michel Dänzer            |                  http://www.amd.com
Libre software enthusiast          |                Mesa and X developer
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