[Intel-gfx] [PATCH] drm/i915: fix swizzling on gen6+

[Daniel Vetter]

On Mon, Sep 12, 2011 at 09:13:39PM +0100, Chris Wilson wrote:
> On Mon, 12 Sep 2011 20:49:16 +0200, Daniel Vetter <daniel.vetter at ffwll.ch> wrote:
> > Fixes tests/gem_tiled_pread on my snb. I know, mesa doesn't use this
> > on gen6+, but I also hate failing testcases.
> 
> Hmm, I thought gen6 also has DRAM configuration registers that we were
> meant to set and to follow. Not that I could actually find the
> cross-references! I've been surprised that it works and scared
> to poke too hard just in case it was broken underneath. ;-)

Well, I've checked with my ilk and snb, and now it works for both. ymmv.
The other options is to return SWIZZLE_UNKOWN back to userspace and
disable the tests on gen5+. I don't care too much either way, but I think
making it work is less risky. And now that qa actually runs our tests, we
might even catch this earlier.
-Daniel
-- 
Daniel Vetter
Mail: daniel at ffwll.ch
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