Send two null packets before a SLEEP OUT, to work around with a problem in the Lattice
DPHY IP.

Also add some testing code, disabled.
diff --git a/drivers/video/omap2/displays/panel-tonka.c b/drivers/video/omap2/displays/panel-tonka.c
index f263266..d37a34c 100644
--- a/drivers/video/omap2/displays/panel-tonka.c
+++ b/drivers/video/omap2/displays/panel-tonka.c
@@ -1273,6 +1273,22 @@
 	omapdss_dsi_vc_enable_hs(dssdev, td->channel, true);
 #endif
 
+#if 0
+	{
+		int i = 0;
+		printk("XXX SENDING NULL PACKETS\n");
+		unsigned long timeout = jiffies + msecs_to_jiffies(15000);
+		do {
+			(void) dsi_vc_send_null(td->dssdev, td->channel);
+			i++;
+		} while (time_before(jiffies, timeout));
+		printk("XXX SENT %d NULL PACKETS\n", i);
+	}
+#endif
+
+	(void) dsi_vc_send_null(td->dssdev, td->channel);
+	(void) dsi_vc_send_null(td->dssdev, td->channel);
+
 	r = tonka_sleep_out(td);
 	if (r)
 		goto err;
@@ -1620,7 +1636,11 @@
 	if (r)
 		goto err;
 
+#if 1
 	if (td->te_enabled && panel_data->use_ext_te) {
+#else
+	if (0) {
+#endif
 		td->update_region.x = x;
 		td->update_region.y = y;
 		td->update_region.w = w;