staging: sw_sync: Add debug support

Add debugfs support hooks.

Cc: Maarten Lankhorst <maarten.lankhorst@canonical.com>
Cc: Erik Gilling <konkers@android.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Rob Clark <robclark@gmail.com>
Cc: Sumit Semwal <sumit.semwal@linaro.org>
Cc: dri-devel@lists.freedesktop.org
Cc: Android Kernel Team <kernel-team@android.com>
Signed-off-by: Erik Gilling <konkers@android.com>
[jstultz: Add commit message]
Signed-off-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/android/sw_sync.c

@@ -70,11 +70,30 @@ static int sw_sync_pt_compare(struct sync_pt *a, struct sync_pt *b)
 	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,
 };