tree bf5780faae3711bb43ded8f984d377c7f94c462b
parent de3f440f8c9922afe8770dd16c84f1c87d779b59
author Li Peng <peng.li@linux.intel.com> 1264611909 +0800
committer Eric Anholt <eric@anholt.net> 1264803729 -0800

drm/i915: don't trigger ironlake vblank interrupt at irq install

Zhenyu noticed that the ironlake vblank enabling patch has one
issue that it will trigger vblank starting from irq postinstall,
this isn't necessary. This patch addresses this issue by only
adding the vblank into DEIER but mask them in DEIMR, so that it
won't trigger vblank interrupt at irq install.

Signed-off-by: Li Peng <peng.li@intel.com>
Acked-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Signed-off-by: Eric Anholt <eric@anholt.net>