From: Alex Deucher <alexander.deucher@amd.com>
Date: Fri, 28 Oct 2011 14:30:02 +0000 (-0400)
Subject: drm/radeon/kms: allocate vram scratch page on 6xx+
X-Git-Tag: v3.2-rc1~11^2~25
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=16cdf04d30c24a6e698863351c11d9a8da2591ed;p=pandora-kernel.git

drm/radeon/kms: allocate vram scratch page on 6xx+

The vram scratch was originally only used on some 7xx asics
to work around a hw bug.  Allocate the scratch page on all 6xx+
radeons and set the MC_VM_SYSTEM_APERTURE_DEFAULT_ADDR to point
to it.  We shouldn't ever hit it since we limit the system
aperture to vram or vram and AGP, but better safe than sorry.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
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