[media] media_device: add a topology version field
Every time a graph object is added or removed, the version
of the topology changes. That's a requirement for the new
MEDIA_IOC_G_TOPOLOGY, in order to allow userspace to know
that the topology has changed after a previous call to it.
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
diff --git a/drivers/media/media-entity.c b/drivers/media/media-entity.c
index 2f3d3aa..1b2fd72 100644
--- a/drivers/media/media-entity.c
+++ b/drivers/media/media-entity.c
@@ -173,6 +173,9 @@
list_add_tail(&gobj->list, &mdev->interfaces);
break;
}
+
+ mdev->topology_version++;
+
dev_dbg_obj(__func__, gobj);
}
@@ -187,6 +190,8 @@
{
dev_dbg_obj(__func__, gobj);
+ gobj->mdev->topology_version++;
+
/* Remove the object from mdev list */
list_del(&gobj->list);
}