[Intel-gfx] [PATCH] drm/i915: Sanitize the output registers after resume

[Chris Wilson]

After sending this patch, to the changelog I added:

See commit 47f1c6c9ffdec0c0e5a2c2709bd63c7380b325c4 ("drm/i915:
Clean conflicting modesetting registers upon init") for further details
on the original bug.

-- 
Chris Wilson, Intel Open Source Technology Centre