drm/i915: assume all GM45 Acer laptops use inverted backlight PWM
authorJani Nikula <jani.nikula@intel.com>
Fri, 20 Sep 2013 12:05:30 +0000 (15:05 +0300)
committerDaniel Vetter <daniel.vetter@ffwll.ch>
Fri, 20 Sep 2013 21:50:44 +0000 (23:50 +0200)
commitee1452d7458451a7508e0663553ce88d63958157
treef3f7b7b10388056734a0bf5e025035b6692f9d14
parente5ad4026b9270532bfbc2fcb73cc74fbb46887d1
drm/i915: assume all GM45 Acer laptops use inverted backlight PWM

There is plenty of evidence suggesting all of the GM45 based Acer
laptops (including their eMachines and Packard Bell brands) use inverted
backlight PWM. Assume this is really the case, and quirk them all.

The old bugs that were fixed by subsystem device specific quirks:
 * https://bugs.freedesktop.org/show_bug.cgi?id=59628
 * https://bugzilla.kernel.org/show_bug.cgi?id=31522#c35
 * https://bugs.freedesktop.org/show_bug.cgi?id=44156
 * https://bugzilla.kernel.org/show_bug.cgi?id=53881

See also this bug and the plethora of duplicates:
 * https://bugs.launchpad.net/ubuntu/+source/linux/+bug/765438

References: https://bugzilla.kernel.org/show_bug.cgi?id=54171
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
drivers/gpu/drm/i915/intel_display.c