Adding upstream version 4.19.249.upstream/4.19.249upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 21 insertions, 0 deletions

diff --git a/Documentation/media/uapi/v4l/dev-effect.rst b/Documentation/media/uapi/v4l/dev-effect.rst
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index 000000000..b946cc9e1
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+.. -*- coding: utf-8; mode: rst -*-
+
+.. _effect:
+
+************************
+Effect Devices Interface
+************************
+
+.. note::
+    This interface has been be suspended from the V4L2 API.
+    The implementation for such effects should be done
+    via mem2mem devices.
+
+A V4L2 video effect device can do image effects, filtering, or combine
+two or more images or image streams. For example video transitions or
+wipes. Applications send data to be processed and receive the result
+data either with :ref:`read() <func-read>` and
+:ref:`write() <func-write>` functions, or through the streaming I/O
+mechanism.
+
+[to do]