commit a95735569312f2ab0c80425e2cd1e5cb0b4e1870
author Chris Wilson <chris@chris-wilson.co.uk> Sun Aug 22 13:18:16 2010 +0100
committer Chris Wilson <chris@chris-wilson.co.uk> Wed Sep 08 10:23:58 2010 +0100
tree 9daf28afa9b797b7f51486f4f759de9359b1e1e9
parent 5d607f9b038ea03f5e5b3064d2f3993f9ea67e1e

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>