drm/i915: Set guardband clipping workaround bit in the right register.
A previous patch, namely: commit bf97b276 Author: Daniel Vetter <daniel.vetter@ffwll.ch> Date: Wed Apr 11 20:42:41 2012 +0200 drm/i915: implement w/a for incorrect guarband clipping accidentally set bit 5 in 3D_CHICKEN, which has nothing to do with clipping. This patch changes it to be set in 3D_CHICKEN3, where it belongs. The game "Dante" demonstrates random clipping issues when guardband clipping is enabled and bit 5 of 3D_CHICKEN3 isn't set. So the workaround is actually necessary. Cc: Daniel Vetter <daniel.vetter@ffwll.ch> Cc: Oliver McFadden <oliver.mcfadden@linux.intel.com> Acked-by: NPaul Menzel <paulepanter@users.sourceforge.net> Signed-off-by: NKenneth Graunke <kenneth@whitecape.org> Reviewed-by: NMika Kuoppala <mika.kuoppala@intel.com> Cc: stable@vger.kernel.org Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
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