mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-27 08:25:12 +07:00
82559ac027
All those files are under GFDL 1.1 or later, with no invariant sections. Tag them as such. Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
73 lines
1.8 KiB
ReStructuredText
73 lines
1.8 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/media/uapi/fdl-appendix.rst.
|
|
..
|
|
.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections
|
|
|
|
.. _FE_READ_STATUS:
|
|
|
|
********************
|
|
ioctl FE_READ_STATUS
|
|
********************
|
|
|
|
Name
|
|
====
|
|
|
|
FE_READ_STATUS - Returns status information about the front-end. This call only requires - read-only access to the device
|
|
|
|
|
|
Synopsis
|
|
========
|
|
|
|
.. c:function:: int ioctl( int fd, FE_READ_STATUS, unsigned int *status )
|
|
:name: FE_READ_STATUS
|
|
|
|
|
|
Arguments
|
|
=========
|
|
|
|
``fd``
|
|
File descriptor returned by :ref:`open() <frontend_f_open>`.
|
|
|
|
``status``
|
|
pointer to a bitmask integer filled with the values defined by enum
|
|
:c:type:`fe_status`.
|
|
|
|
|
|
Description
|
|
===========
|
|
|
|
All Digital TV frontend devices support the ``FE_READ_STATUS`` ioctl. It is
|
|
used to check about the locking status of the frontend after being
|
|
tuned. The ioctl takes a pointer to an integer where the status will be
|
|
written.
|
|
|
|
.. note::
|
|
|
|
The size of status is actually sizeof(enum fe_status), with
|
|
varies according with the architecture. This needs to be fixed in the
|
|
future.
|
|
|
|
|
|
int fe_status
|
|
=============
|
|
|
|
The fe_status parameter is used to indicate the current state and/or
|
|
state changes of the frontend hardware. It is produced using the enum
|
|
:c:type:`fe_status` values on a bitmask
|
|
|
|
|
|
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.
|