From: Jani Nikula <jani.nikula@intel.com>
Date: Tue, 12 Aug 2014 14:11:42 +0000 (+0300)
Subject: drm/i915: switch off backlight for backlight class 0 brightness
X-Git-Tag: fixes-against-v3.18-rc2~73^2~32^2~106
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e6755fb78e8f20ecadf2a4080084121336624ad9;p=pandora-kernel.git

drm/i915: switch off backlight for backlight class 0 brightness

Make backlight class sysfs brightness 0 value switch off the backlight
for connectors that have the backlight_power callback defined. For eDP,
this has the similar caveats regarding power savings as bl_power as only
the power sequencer backlight control is switched off.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed_by: Clinton Taylor <Clinton.A.Taylor@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
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