diff -urNp a/drivers/gpu/drm/nouveau/nouveau_connector.c b/drivers/gpu/drm/nouveau/nouveau_connector.c
--- a/drivers/gpu/drm/nouveau/nouveau_connector.c	2012-08-02 18:38:10.000000000 -0500
+++ b/drivers/gpu/drm/nouveau/nouveau_connector.c	2012-08-10 00:07:47.839038880 -0500
@@ -650,6 +650,11 @@ nouveau_connector_detect_depth(struct dr
 	struct drm_display_mode *mode = nv_connector->native_mode;
 	bool duallink;
 
+	/* force BPC to 6 for Retina testing */
+	NV_DEBUG_KMS(connector->dev, "forcing bpc = 6 for retina\n");
+	connector->display_info.bpc = 6;
+	return;
+
 	/* if the edid is feeling nice enough to provide this info, use it */
 	if (nv_connector->edid && connector->display_info.bpc)
 		return;