Merge branches 'pm-core', 'pm-clk', 'pm-domains' and 'pm-pci'

[deliverable/linux.git] / drivers / gpu / drm / i915 / intel_opregion.c

diff --git a/drivers/gpu/drm/i915/intel_opregion.c b/drivers/gpu/drm/i915/intel_opregion.c
index 99e26034ae8d0df783d706839b67b0fd2f161585..16e209d326b69469278fd93f47e8d7e26237a29c 100644 (file)
--- a/drivers/gpu/drm/i915/intel_opregion.c
+++ b/drivers/gpu/drm/i915/intel_opregion.c
@@ -1038,5 +1038,16 @@ intel_opregion_get_panel_type(struct drm_device *dev)
                return -ENODEV;
        }
 
+       /*
+        * FIXME On Dell XPS 13 9350 the OpRegion panel type (0) gives us
+        * low vswing for eDP, whereas the VBT panel type (2) gives us normal
+        * vswing instead. Low vswing results in some display flickers, so
+        * let's simply ignore the OpRegion panel type on SKL for now.
+        */
+       if (IS_SKYLAKE(dev)) {
+               DRM_DEBUG_KMS("Ignoring OpRegion panel type (%d)\n", ret - 1);
+               return -ENODEV;
+       }
+
        return ret - 1;
 }