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

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>

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 92208f8d35125d71f0fee8bd5913eb96f9f27925..683002fb63d1797d103dc4e4757c3d98a6c7004f 100644 (file)
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -9021,7 +9021,8 @@ 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)
 {
@@ -9061,6 +9062,9 @@ 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)