drm/i915: enable vdd when switching off the eDP panel
authorDaniel Vetter <daniel.vetter@ffwll.ch>
Sun, 20 May 2012 15:14:50 +0000 (17:14 +0200)
committerDaniel Vetter <daniel.vetter@ffwll.ch>
Thu, 24 May 2012 15:54:01 +0000 (17:54 +0200)
commit6cb49835da0426f69a2931bc2a0a8156344b0e41
tree72658df0053d2bbeccb9260c28e14ac307f4786a
parent92b27b088c51bd9a979e39e184c41b1f57352dca
drm/i915: enable vdd when switching off the eDP panel

We have one bug report from a validation team that we get the eDP
panel sequencing still somewhat wrong: We need to enable VDD while
switching off the panel and backlight. Unfortunately that reporter
seems to have fallen off the earth :(

For another reporter this actually fixes a black panel issue because
without this the backlight/panel gets confused and doesn't light up
again.

v2: I've forgotten to remove the vdd_off call in panel_off which is
now bogus. This essentially reverts

commit 17038de5f16569a25343cf68668f3b657eafb00e
Author: Chris Wilson <chris@chris-wilson.co.uk>
Date:   Mon Apr 16 22:43:42 2012 +0100

    drm/i915/dp: Flush any outstanding work to turn the VDD off

v3: the current panel_off code forces off the vdd power, too. Which is
bogus and resulted in some funny warnings later on when we've tried to
do aux channel communications with just the vdd forced on. Fix this,
too.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=46312
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=43163
Tested-by: Vincent Frentzel <zcecc22@gmail.com>
Cc: stable@kernel.org
Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
drivers/gpu/drm/i915/intel_dp.c