diff --git a/include/media/v4l2-subdev.h b/include/media/v4l2-subdev.h
index 2ecd737..abf1a0e 100644
--- a/include/media/v4l2-subdev.h
+++ b/include/media/v4l2-subdev.h
@@ -274,6 +274,10 @@
    s_mbus_config: set a certain mediabus configuration. This operation is added
 	for compatibility with soc-camera drivers and should not be used by new
 	software.
+
+   s_rx_buffer: set a host allocated memory buffer for the subdev. The subdev
+	can adjust @size to a lower value and must not write more data to the
+	buffer starting at @data than the original value of @size.
  */
 struct v4l2_subdev_video_ops {
 	int (*s_routing)(struct v4l2_subdev *sd, u32 input, u32 output, u32 config);
@@ -327,6 +331,8 @@
 			     struct v4l2_mbus_config *cfg);
 	int (*s_mbus_config)(struct v4l2_subdev *sd,
 			     const struct v4l2_mbus_config *cfg);
+	int (*s_rx_buffer)(struct v4l2_subdev *sd, void *buf,
+			   unsigned int *size);
 };
 
 /*