drm/radeon: add backlight quirk for hybrid mac
authorAlex Deucher <alexander.deucher@amd.com>
Mon, 10 Jun 2013 13:57:07 +0000 (09:57 -0400)
committerAlex Deucher <alexander.deucher@amd.com>
Wed, 12 Jun 2013 12:22:49 +0000 (08:22 -0400)
Mac laptops with multiple GPUs apparently use the gmux
driver for backlight control.  Don't register a radeon
backlight interface.  We may need to add other pci ids
for other hybrid mac laptops.

Fixes:
https://bugs.freedesktop.org/show_bug.cgi?id=65377

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org

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