drm/i915: panel: invert brightness acer aspire 5734z

commit 5a15ab5b93e4a3ebcd4fa6c76cf646a45e9cf806 upstream.

Mark the Acer Aspire 5734Z that this machines requires the module to
invert the panel backlight brightness value after reading from and prior
to writing to the PCI configuration space.

Signed-off-by: Carsten Emde <C.Emde@osadl.org>
Acked-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Acked-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index b096c0e74cc51a4a3ceaaa72bed5419e6d7d1f0f..2de874c34c2fc49227b65e0ea22fe05b7c53b9e5 100644 (file)
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -8832,7 +8832,8 @@ static void quirk_ssc_force_disable(struct drm_device *dev)
 }
 
 /*
- * A machine may need to invert the panel backlight brightness value
+ * A machine (e.g. Acer Aspire 5734Z) may need to invert the panel backlight
+ * brightness value
  */
 static void quirk_invert_brightness(struct drm_device *dev)
 {
@@ -8874,6 +8875,9 @@ struct intel_quirk intel_quirks[] = {
 
        /* Sony Vaio Y cannot use SSC on LVDS */
        { 0x0046, 0x104d, 0x9076, quirk_ssc_force_disable },
+
+       /* Acer Aspire 5734Z must invert backlight brightness */
+       { 0x2a42, 0x1025, 0x0459, quirk_invert_brightness },
 };
 
 static void intel_init_quirks(struct drm_device *dev)