diff --git a/Documentation/media-framework.txt b/Documentation/media-framework.txt
index ab17f33..78ae020 100644
--- a/Documentation/media-framework.txt
+++ b/Documentation/media-framework.txt
@@ -258,3 +258,16 @@
 
 Graph traversal can be interrupted at any moment. No cleanup function call is
 required and the graph structure can be freed normally.
+
+
+Use count and power handling
+----------------------------
+
+Due to the wide differences between drivers regarding power management needs,
+the media controller does not implement power management. However, the
+media_entity structure includes a use_count field that media drivers can use to
+track the number of users of every entity for power management needs.
+
+The use_count field is owned by media drivers and must not be touched by entity
+drivers. Access to the field must be protected by the media device graph_mutex
+lock.