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| -rw-r--r-- | Documentation/driver-api/media/v4l2-subdev.rst | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/Documentation/driver-api/media/v4l2-subdev.rst b/Documentation/driver-api/media/v4l2-subdev.rst index eba5e4468282..e56b50b3f203 100644 --- a/Documentation/driver-api/media/v4l2-subdev.rst +++ b/Documentation/driver-api/media/v4l2-subdev.rst @@ -218,6 +218,17 @@ available. There may be one or more async connections to a given sub-device but this is not known at the time of adding the connections to the notifier. Async connections are bound as matching async sub-devices are found, one by one. +Asynchronous sub-device notifier for sub-devices +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + +A driver that registers an asynchronous sub-device may also register an +asynchronous notifier. This is called an asynchronous sub-device notifier andthe +process is similar to that of a bridge driver apart from that the notifier is +initialised using :c:func:`v4l2_async_subdev_nf_init` instead. A sub-device +notifier may complete only after the V4L2 device becomes available, i.e. there's +a path via async sub-devices and notifiers to a notifier that is not an +asynchronous sub-device notifier. + Asynchronous sub-device registration helper for camera sensor drivers ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ |