sw_sync: add debug support

Change-Id: Ibcc5fa8cb36e283cdf0e3308064876722e2675fc
Signed-off-by: Erik Gilling <konkers@android.com>
diff --git a/drivers/base/sw_sync.c b/drivers/base/sw_sync.c
index e94ecc7..41beb9e 100644
--- a/drivers/base/sw_sync.c
+++ b/drivers/base/sw_sync.c
@@ -69,11 +69,30 @@
 	return sw_sync_cmp(pt_a->value, pt_b->value);
 }
 
+static void sw_sync_print_obj(struct seq_file *s,
+			      struct sync_timeline *sync_timeline)
+{
+	struct sw_sync_timeline *obj = (struct sw_sync_timeline *)sync_timeline;
+
+	seq_printf(s, "%d", obj->value);
+}
+
+static void sw_sync_print_pt(struct seq_file *s, struct sync_pt *sync_pt)
+{
+	struct sw_sync_pt *pt = (struct sw_sync_pt *)sync_pt;
+	struct sw_sync_timeline *obj =
+		(struct sw_sync_timeline *)sync_pt->parent;
+
+	seq_printf(s, "%d / %d", pt->value, obj->value);
+}
+
 struct sync_timeline_ops sw_sync_timeline_ops = {
 	.driver_name = "sw_sync",
 	.dup = sw_sync_pt_dup,
 	.has_signaled = sw_sync_pt_has_signaled,
 	.compare = sw_sync_pt_compare,
+	.print_obj = sw_sync_print_obj,
+	.print_pt = sw_sync_print_pt,
 };