expo: Draw the current opened menu on top

When a menu is opened, it must be displayed over all other objects in
the scene, so that all its items are visible.

Handle this by drawing the menu object a second time, after all other
objects have been drawn. Draw all of the objects which are dependent
on the menu object.

Signed-off-by: Simon Glass <sjg@chromium.org>

1 files changed, 12 insertions, 0 deletions

diff --git a/boot/expo.c b/boot/expo.c
index d5e935966b..e99555163c 100644
--- a/boot/expo.c
+++ b/boot/expo.c
@@ -172,6 +172,18 @@ int expo_set_scene_id(struct expo *exp, uint scene_id)
 	return 0;
 }
 
+int expo_first_scene_id(struct expo *exp)
+{
+	struct scene *scn;
+
+	if (list_empty(&exp->scene_head))
+		return -ENOENT;
+
+	scn = list_first_entry(&exp->scene_head, struct scene, sibling);
+
+	return scn->id;
+}
+
 int expo_render(struct expo *exp)
 {
 	struct udevice *dev = exp->display;