Documentation/userspace-api/media/dvb/fe-set-frontend-tune-mode.rst

Source file repositories/reference/linux-study-clean/Documentation/userspace-api/media/dvb/fe-set-frontend-tune-mode.rst

File Facts

System: Linux kernel
Corpus path: Documentation/userspace-api/media/dvb/fe-set-frontend-tune-mode.rst
Extension: .rst
Size: 1301 bytes
Lines: 56
Domain: Support Tooling And Documentation
Bucket: Documentation
Inferred role: Support Tooling And Documentation: documentation
Status: atlas-only

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

No C-style include directives detected by the generator.

Detected Declarations

No top-level syscall, struct, function, initcall, or export declaration detected by the generator.

Annotated Snippet

.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
.. c:namespace:: DTV.fe

.. _FE_SET_FRONTEND_TUNE_MODE:

*******************************
ioctl FE_SET_FRONTEND_TUNE_MODE
*******************************

Name
====

FE_SET_FRONTEND_TUNE_MODE - Allow setting tuner mode flags to the frontend.

Synopsis
========

.. c:macro:: FE_SET_FRONTEND_TUNE_MODE

``int ioctl(int fd, FE_SET_FRONTEND_TUNE_MODE, unsigned int flags)``

Arguments
=========

``fd``
    File descriptor returned by :c:func:`open()`.

``flags``
    Valid flags:

    -  0 - normal tune mode

    -  ``FE_TUNE_MODE_ONESHOT`` - When set, this flag will disable any
       zigzagging or other "normal" tuning behaviour. Additionally,
       there will be no automatic monitoring of the lock status, and
       hence no frontend events will be generated. If a frontend device
       is closed, this flag will be automatically turned off when the
       device is reopened read-write.

Description
===========

Allow setting tuner mode flags to the frontend, between 0 (normal) or
``FE_TUNE_MODE_ONESHOT`` mode

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.

Annotation

Atlas domain: Support Tooling And Documentation / Documentation.
Implementation status: atlas-only.

Implementation Notes

This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.