sync: refactor sync debug printing

Move driver callbacks to fill strings instead of using seq_files.  This
will allow those values to be used in a future tracepoint patch.

Change-Id: I9b706343e35b11124141fe520e520514a32003d2
Signed-off-by: Erik Gilling <konkers@android.com>
diff --git a/drivers/base/sync.c b/drivers/base/sync.c
index d8987dc..3943051 100644
--- a/drivers/base/sync.c
+++ b/drivers/base/sync.c
@@ -842,7 +842,17 @@
 		seq_printf(s, "@%ld.%06ld", tv.tv_sec, tv.tv_usec);
 	}
 
-	if (pt->parent->ops->print_pt) {
+	if (pt->parent->ops->timeline_value_str &&
+	    pt->parent->ops->pt_value_str) {
+		char value[64];
+		pt->parent->ops->pt_value_str(pt, value, sizeof(value));
+		seq_printf(s, ": %s", value);
+		if (fence) {
+			pt->parent->ops->timeline_value_str(pt->parent, value,
+						    sizeof(value));
+			seq_printf(s, " / %s", value);
+		}
+	} else if (pt->parent->ops->print_pt) {
 		seq_printf(s, ": ");
 		pt->parent->ops->print_pt(s, pt);
 	}
@@ -857,7 +867,11 @@
 
 	seq_printf(s, "%s %s", obj->name, obj->ops->driver_name);
 
-	if (obj->ops->print_obj) {
+	if (obj->ops->timeline_value_str) {
+		char value[64];
+		obj->ops->timeline_value_str(obj, value, sizeof(value));
+		seq_printf(s, ": %s", value);
+	} else if (obj->ops->print_obj) {
 		seq_printf(s, ": ");
 		obj->ops->print_obj(s, obj);
 	}