mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2025-01-13 04:56:32 +07:00
54f38fcae5
Since 2017, there is an space reserved for userspace API,
created by changeset 1d596dee38 ("docs: Create a user-space API guide").
As the media subsystem was one of the first subsystems to use
Sphinx, until this patch, we were keeping things on a separate
place.
Let's just use the new location, as having all uAPI altogether
will likely make things easier for developers.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
54 lines
1.1 KiB
ReStructuredText
54 lines
1.1 KiB
ReStructuredText
.. Permission is granted to copy, distribute and/or modify this
|
|
.. document under the terms of the GNU Free Documentation License,
|
|
.. Version 1.1 or any later version published by the Free Software
|
|
.. Foundation, with no Invariant Sections, no Front-Cover Texts
|
|
.. and no Back-Cover Texts. A copy of the license is included at
|
|
.. Documentation/userspace-api/media/fdl-appendix.rst.
|
|
..
|
|
.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections
|
|
|
|
.. _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 (referred 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.
|