From: Ben Hutchings <ben@decadent.org.uk>
Subject: cirrus: Disable by default

Current Debian userland is not compatible with this driver, so set
modeset=0 by default (making module init fail).
xserver-xorg-video-cirrus will need to override this once it is
compatible, by installing a modprobe config file.

--- a/drivers/gpu/drm/cirrus/cirrus_drv.c
+++ b/drivers/gpu/drm/cirrus/cirrus_drv.c
@@ -15,7 +15,7 @@
 
 #include "cirrus_drv.h"
 
-int cirrus_modeset = -1;
+int cirrus_modeset = 0;
 
 MODULE_PARM_DESC(modeset, "Disable/Enable modesetting");
 module_param_named(modeset, cirrus_modeset, int, 0400);