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-rw-r--r--Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst2
1 files changed, 2 insertions, 0 deletions
diff --git a/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst b/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst
index e88b5e6944a6..c2e0adece613 100644
--- a/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst
+++ b/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst
@@ -2986,6 +2986,8 @@ enum v4l2_mpeg_video_hevc_size_of_length_field -
These bitstream parameters are defined according to :ref:`hevc`.
They are described in section 7.4.7 "General slice segment header
semantics" of the specification.
+ This control is a dynamically sized 1-dimensional array,
+ V4L2_CTRL_FLAG_DYNAMIC_ARRAY flag must be set when using it.
.. c:type:: v4l2_ctrl_hevc_slice_params