From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Sun, 22 Aug 2010 12:18:16 +0000 (+0100)
Subject: drm/i915: Refactor panel backlight controls
X-Git-Tag: v2.6.37-rc1~92^2~28^2~204
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a95735569312f2ab0c80425e2cd1e5cb0b4e1870;p=pandora-kernel.git

drm/i915: Refactor panel backlight controls

There were two instances of code to control the panel backlight and
neither handled the complete set of device variations.

Fixes:

  Bug 29716 - [GM965] Regression: Backlight resets to minimum when changing resolution
  https://bugs.freedesktop.org/show_bug.cgi?id=29716

And a bug on one of my PineView boxes which overflowed the backlight
value.

Incorporates part of a similar patch by Matthew Garrett that exposes a
native Intel backlight controller.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
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