drm/i915/panel: Only record the backlight level when it is enabled
authorChris Wilson <chris@chris-wilson.co.uk>
Tue, 11 Jan 2011 17:06:04 +0000 (17:06 +0000)
committerChris Wilson <chris@chris-wilson.co.uk>
Tue, 11 Jan 2011 20:27:04 +0000 (20:27 +0000)
commit47356eb67285014527a5ab87543ba1fae3d1e10a
tree99281f2efc166c00930060dfa80d1af47509e2c8
parent97aaf910731b03b27b1c4c8a58006a1dc99dcd9a
drm/i915/panel: Only record the backlight level when it is enabled

By tracking the current status of the backlight we can prevent recording
the value of the current backlight when we have disabled it. And so
prevent restoring it to 'off' after an unbalanced sequence of
intel_lvds_disable/enable.

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=22672
Tested-by: Alex Riesen <raa.lkml@gmail.com>
Tested-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: stable@kernel.org
drivers/gpu/drm/i915/i915_drv.h
drivers/gpu/drm/i915/intel_display.c
drivers/gpu/drm/i915/intel_drv.h
drivers/gpu/drm/i915/intel_lvds.c
drivers/gpu/drm/i915/intel_panel.c