[Intel-gfx] [PATCH 1/2] drm/i915: set more FBC chicken bits

[Jesse Barnes]

On Tue, 18 Jan 2011 09:58:52 +0000
Chris Wilson <chris at chris-wilson.co.uk> wrote:

> On Mon, 17 Jan 2011 13:35:57 -0800, Jesse Barnes <jbarnes at virtuousgeek.org> wrote:
> > Add a couple of missing workaround bits for ILK & SNB.  These disable
> > clock gating on a couple of units that would otherwise prevent FBC from
> > working.
> 
> Both pulled into -fixes. I guess for -next we can even try re-enabling FBC
> on ILK and poke https://bugs.freedesktop.org/show_bug.cgi?id=31742

Looks like we may need to set these bits on every FBC enable too; I
came back after a DPMS and saw the same symptom, and the docs had a
warning about "the contents of this register may not be preserved".
Testing now.

-- 
Jesse Barnes, Intel Open Source Technology Center