drm/i915: properly disable the VDD when disabling the panel
Commit b3064154 tried to revert commit dff392db, but wasn't complete, which resulted in regressions on Haswell. So this commit should fix b3064154 by undoing what it did and providing an actual complete revert of dff392db. Fixes regression introduced by: commit b3064154 Author: Patrik Jakobsson <patrik.r.jakobsson@gmail.com> Date: Tue Mar 4 00:42:44 2014 +0100 drm/i915: Don't just say it, actually force edp vdd Testcase: igt/pm_pc8 Signed-off-by: NPaulo Zanoni <paulo.r.zanoni@intel.com> Tested-by: NPatrik Jakobsson <patrik.r.jakobsson@gmail.com> Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
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