From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Fri, 3 Dec 2010 15:37:31 +0000 (+0000)
Subject: drm/i915: Clean conflicting modesetting registers upon init
X-Git-Tag: v2.6.37-rc6~37^2~6^2~8
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=47f1c6c9ffdec0c0e5a2c2709bd63c7380b325c4;p=pandora-kernel.git

drm/i915: Clean conflicting modesetting registers upon init

If we leave the registers in a conflicting state then when we attempt
to teardown the active mode, we will not disable the pipes and planes
in the correct order -- leaving a plane reading from a disabled pipe and
possibly leading to undefined behaviour.

Reported-and-tested-by: Andy Whitcroft <apw@canonical.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=32078
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: stable@kernel.org
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