Commits
Li Peng committed 643ced9b0b4
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>