From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jesse Barnes <jbarnes@virtuousgeek.org>
Subject: Re: [PATCH 1/2] drm/i915: re-enable semaphores by
 default
Date: Wed, 16 Nov 2011 11:23:50 -0800
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To: Eugeni Dodonov <eugeni@dodonov.net>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>, intel-gfx@lists.freedesktop.org, Eugeni Dodonov <eugeni.dodonov@intel.com>
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On Wed, 16 Nov 2011 17:05:37 -0200
Eugeni Dodonov <eugeni@dodonov.net> wrote:

> On Wed, Nov 16, 2011 at 15:24, Andrew Lutomirski <luto@mit.edu> wrote:
> 
> > AFAICT my snb laptop has always been stable with semaphores and VT-d
> > enabled.  Is this problem possibly restricted to just desktop
> > machines?  I'm happy to test, since my box that can reproduce the hang
> > instantly is still around.
> >
> 
> I cannot reproduce those issues on any mobile SNB, but I am out of desktop
> ones. So perhaps it is a clue.
> 
> Jesse, Keith, Daniel, what if we add something like:
> 
> ...
> .has_semaphores=1, .has_rc6=1
> ...
> 
> to i915_drv.c intel_sandybridge_m_info, and take them into account when
> using default values for those settings?

Something like that is fine with me, or just doing it in modeset_init
for certain chipsets.

-- 
Jesse Barnes, Intel Open Source Technology Center