--- linux-4.8/drivers/gpu/drm/i915/intel_opregion.c	2016-10-02 19:24:33.000000000 -0400
+++ linux-4.8-patch/drivers/gpu/drm/i915/intel_opregion.c	2016-10-04 01:20:40.928367713 -0400
@@ -1047,23 +1047,6 @@
 	return err;
 }
 
-static int intel_use_opregion_panel_type_callback(const struct dmi_system_id *id)
-{
-	DRM_INFO("Using panel type from OpRegion on %s\n", id->ident);
-	return 1;
-}
-
-static const struct dmi_system_id intel_use_opregion_panel_type[] = {
-	{
-		.callback = intel_use_opregion_panel_type_callback,
-		.ident = "Conrac GmbH IX45GM2",
-		.matches = {DMI_MATCH(DMI_SYS_VENDOR, "Conrac GmbH"),
-			    DMI_MATCH(DMI_PRODUCT_NAME, "IX45GM2"),
-		},
-	},
-	{ }
-};
-
 int
 intel_opregion_get_panel_type(struct drm_i915_private *dev_priv)
 {
@@ -1089,16 +1072,6 @@
 		return -ENODEV;
 	}
 
-	/*
-	 * So far we know that some machined must use it, others must not use it.
-	 * There doesn't seem to be any way to determine which way to go, except
-	 * via a quirk list :(
-	 */
-	if (!dmi_check_system(intel_use_opregion_panel_type)) {
-		DRM_DEBUG_KMS("Ignoring OpRegion panel type (%d)\n", ret - 1);
-		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