From 8aff6ad5a393b8e2ad00dce4d278ecf41397bf0d Mon Sep 17 00:00:00 2001
From: Alex Deucher <alexander.deucher@amd.com>
Date: Wed, 17 Sep 2014 11:31:02 -0400
Subject: [PATCH] drm/radeon: add a backlight quirk for Amilo Xi 2550

Only the acpi backlight seems to work.  Using the
radeon backlight controller causes the backlight to
go off.

bug:
https://bugs.freedesktop.org/show_bug.cgi?id=81382

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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