[PATCH][Natty SRU] drm/i915: Sanitize the output registers after resume

[Seth Forshee]

This patch is already queued for the next .38 stable release, but I'd
like to go ahead and get it in for the first natty SRU.

SRU Justification

Impact: Graphics corruption after resuming from hiberante on some
machines with Intel GMA 3150 graphics, others potentially affected as
well.

Fix: Upstream patch to force output registers to known state in resume
hanlder

Test case: Hibernate affected machines and observe the display after
resuming.

BugLink: http://bugs.launchpad.net/bugs/745304


Chris Wilson (1):
  drm/i915: Sanitize the output registers after resume

 drivers/gpu/drm/i915/intel_display.c |   68 ++++++++++++++++++----------------
 1 files changed, 36 insertions(+), 32 deletions(-)