[Intel-gfx] [PATCH] allocate MCHBAR space & enable if necessary

[Chris Wilson]

On Tue, 2009-01-27 at 16:52 -0800, Jesse Barnes wrote:
> Here's an updated version that remembers whether the BAR should be disabled
> again or not.
> 
> -- 
> Jesse Barnes, Intel Open Source Technology Center
> 
> I noticed on my Eee 901 that the i915 DRM driver wasn't reading the MCHBAR
> reg at startup time, and so it would disable tiling.  For decent
> performance, especially on an Eee-like platform, tiling is a must.  So I
> put this patch together to allocate MCHBAR space and enable it if
> necessary.  I've only tested it on 915 so far, but would appreciate wider
> testing.
> 
> Signed-off-by: Jesse Barnes <jbarnes at virtuousgeek.org>

Just a reminder that this works for me and is required to enable tiling
on my i915...

Tested-by: Chris Wilson <chris at chris-wilson.co.uk> [i915]