Adding upstream version 4.19.249.upstream/4.19.249upstream

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

1 files changed, 46 insertions, 0 deletions

diff --git a/Documentation/media/uapi/dvb/ca-set-descr.rst b/Documentation/media/uapi/dvb/ca-set-descr.rst
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+.. -*- coding: utf-8; mode: rst -*-
+
+.. _CA_SET_DESCR:
+
+============
+CA_SET_DESCR
+============
+
+Name
+----
+
+CA_SET_DESCR
+
+
+Synopsis
+--------
+
+.. c:function:: int ioctl(fd, CA_SET_DESCR, struct ca_descr *desc)
+    :name: CA_SET_DESCR
+
+
+Arguments
+---------
+
+``fd``
+  File descriptor returned by a previous call to :c:func:`open() <cec-open>`.
+
+``msg``
+  Pointer to struct :c:type:`ca_descr`.
+
+Description
+-----------
+
+CA_SET_DESCR is used for feeding descrambler CA slots with descrambling
+keys (refered as control words).
+
+Return Value
+------------
+
+On success 0 is returned.
+
+On error -1 is returned, and the ``errno`` variable is set
+appropriately.
+
+Generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.