drm/i915: add quirk to invert brightness on eMachines G725

commit 1ffff603 upstream.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=59628Reported-by: Roland Gruber <post@rolandgruber.de>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
[wml: Backported to 3.4: Adjust context]
Signed-off-by: Weng Meiling <wengmeiling.weng@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/gpu/drm/i915/intel_display.c

@@ -9246,6 +9246,9 @@ struct intel_quirk intel_quirks[] = {
 	/* Acer Aspire 5734Z must invert backlight brightness */
 	{ 0x2a42, 0x1025, 0x0459, quirk_invert_brightness },
 
+	/* Acer/eMachines G725 */
+	{ 0x2a42, 0x1025, 0x0210, quirk_invert_brightness },
+
 	/* Dell XPS13 HD Sandy Bridge */
 	{ 0x0116, 0x1028, 0x052e, quirk_no_pcm_pwm_enable },
 	/* Dell XPS13 HD and XPS13 FHD Ivy Bridge */