From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Tue, 23 Nov 2010 12:09:30 +0000 (+0000)
Subject: drm/i915: Compute physical addresses from base of stolen memory
X-Git-Tag: v2.6.38-rc1~419^2~23^2~93
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=fe669bf88e9108b96a847385df08c9b1e98c1420;p=pandora-kernel.git

drm/i915: Compute physical addresses from base of stolen memory

The GATT is a write-only set of registers, reading from them in the
manner of i915_gtt_to_phys() is supposed to be undefined. However a
simple solution exists as we allocate linear memory from the stolen
area, we can simply add the block offset to the base register. As a
side-effect we recover all the unused stolen GTT entries and so enlarge
our aperture.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
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