diff --git a/Documentation/video4linux/v4l2-framework.txt b/Documentation/video4linux/v4l2-framework.txt
index 369d4bc..493ffd1 100644
--- a/Documentation/video4linux/v4l2-framework.txt
+++ b/Documentation/video4linux/v4l2-framework.txt
@@ -266,11 +266,16 @@
 	...
 };
 
+struct v4l2_subdev_pad_ops {
+	...
+};
+
 struct v4l2_subdev_ops {
 	const struct v4l2_subdev_core_ops  *core;
 	const struct v4l2_subdev_tuner_ops *tuner;
 	const struct v4l2_subdev_audio_ops *audio;
 	const struct v4l2_subdev_video_ops *video;
+	const struct v4l2_subdev_pad_ops *video;
 };
 
 The core ops are common to all subdevs, the other categories are implemented
@@ -307,6 +312,10 @@
 
 	media_entity_cleanup(&sd->entity);
 
+If the subdev driver intends to process video and integrate with the media
+framework, it must implement format related functionality using
+v4l2_subdev_pad_ops instead of v4l2_subdev_video_ops.
+
 A device (bridge) driver needs to register the v4l2_subdev with the
 v4l2_device: