[Intel-gfx] [PATCH] drm/i915: quirk away broken OpRegion VBT

[Jesse Barnes]

On Sat, 24 Mar 2012 23:03:08 +0000
Chris Wilson <chris at chris-wilson.co.uk> wrote:

> On Sat, 24 Mar 2012 23:51:30 +0100, Daniel Vetter <daniel.vetter at ffwll.ch> wrote:
> > Somehow the BIOS manages to screw things up when copying the VBT
> > around, because the one we scrap from the VBIOS rom actually works.
> > 
> > Cc: stable at kernel.org
> > Tested-by: Markus Heinz <markus.heinz at uni-dortmund.de>
> > Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=28812
> > Signed-Off-by: Daniel Vetter <daniel.vetter at ffwll.ch>
> 
> That completely disproves my theory that the BIOS writers that went to
> the extra trouble to implement the OpRegion specification would be more
> likely to get it right and to make the information stored there accurate.
> 
> Acked-by: Chris Wilson <chris at chris-wilson.co.uk>

On some platforms OpRegion is the *only* way to get the VBT
reasonably... but quirking around broken ones is fine (though I suspect
we're not doing something right; the OpRegion VBT ought to be fine).

-- 
Jesse Barnes, Intel Open Source Technology Center
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