forked from Minki/linux
60c2820d0f
The name of the subsystem is "media", and not "linux_tv". Also, as we plan to add other stuff there in the future, let's rename also the media uAPI book to media_uapi, to make it clearer. No functional changes. Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
80 lines
1.6 KiB
ReStructuredText
80 lines
1.6 KiB
ReStructuredText
.. -*- coding: utf-8; mode: rst -*-
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.. _FE_SET_FRONTEND:
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***************
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FE_SET_FRONTEND
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***************
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Name
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====
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FE_SET_FRONTEND
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Synopsis
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========
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.. cpp:function:: int ioctl(int fd, int request = FE_SET_FRONTEND, struct dvb_frontend_parameters *p)
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Arguments
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=========
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.. flat-table::
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:header-rows: 0
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:stub-columns: 0
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- .. row 1
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- int fd
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- File descriptor returned by a previous call to open().
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- .. row 2
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- int request
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- Equals :ref:`FE_SET_FRONTEND` for this
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command.
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- .. row 3
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- struct dvb_frontend_parameters \*p
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- Points to parameters for tuning operation.
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Description
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===========
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This ioctl call starts a tuning operation using specified parameters.
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The result of this call will be successful if the parameters were valid
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and the tuning could be initiated. The result of the tuning operation in
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itself, however, will arrive asynchronously as an event (see
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documentation for :ref:`FE_GET_EVENT` and
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FrontendEvent.) If a new :ref:`FE_SET_FRONTEND`
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operation is initiated before the previous one was completed, the
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previous operation will be aborted in favor of the new one. This command
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requires read/write access to the device.
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Return Value
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============
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On success 0 is returned, on error -1 and the ``errno`` variable is set
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appropriately. The generic error codes are described at the
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:ref:`Generic Error Codes <gen-errors>` chapter.
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.. flat-table::
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:header-rows: 0
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:stub-columns: 0
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- .. row 1
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- ``EINVAL``
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- Maximum supported symbol rate reached.
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