diff --git a/src/libcamera/v4l2_videodevice.cpp b/src/libcamera/v4l2_videodevice.cpp
index 14eba0561d6a..156601d08d0c 100644
--- a/src/libcamera/v4l2_videodevice.cpp
+++ b/src/libcamera/v4l2_videodevice.cpp
@@ -2128,11 +2128,16 @@ V4L2PixelFormat V4L2VideoDevice::toV4L2PixelFormat(const PixelFormat &pixelForma
  * deviceNode which operate together using two queues to implement the V4L2
  * Memory to Memory API.
  *
- * The two devices should be opened by calling open() on the V4L2M2MDevice, and
- * can be closed by calling close on the V4L2M2MDevice.
+ * User of this class should create a new instance of the V4L2M2MDevice for each
+ * desired execution context and then open it by calling open() on the
+ * V4L2M2MDevice and close it by calling close() on the V4L2M2MDevice.
  *
  * Calling V4L2VideoDevice::open() and V4L2VideoDevice::close() on the capture
  * or output V4L2VideoDevice is not permitted.
+ *
+ * Once the M2M device is open users can operate on the output and capture queue
+ * represented by the V4L2VideoDevice returned by the output() and capture()
+ * functions.
  */
 
 /**