[Intel-gfx] [PATCH 4/4] drm/i915: don't rewrite the GTT on resume v4

[Daniel Vetter]

On Fri, Nov 02, 2012 at 11:14:02AM -0700, Jesse Barnes wrote:
> The BIOS shouldn't be touching this memory across suspend/resume, so
> just leave it alone.  This saves us ~6ms on resume on my T420 (retested
> with write combined PTEs).
> 
> v2: change gtt restore default on pre-gen4 (Chris)
>     move needs_gtt_restore flag into dev_priv
> v3: make sure we restore GTT on resume from hibernate (Daniel)
>     use opregion support as the cutoff for restore from resume (Chris)
> v4: use a better check for opregion (Chris)
> 
> Reviewed-by: Chris Wilson <chris at chris-wilson.co.uk>
> Signed-off-by: Jesse Barnes <jbarnes at virtuousgeek.org>

Merged, with some bikeshed applied, and the less-than-careful locking
switch in patch 3 fixed. Please check whether I haven't botched it up.

Thanks, Daniel
-- 
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch