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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>
52 lines
1.1 KiB
ReStructuredText
52 lines
1.1 KiB
ReStructuredText
.. -*- coding: utf-8; mode: rst -*-
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.. _FE_ENABLE_HIGH_LNB_VOLTAGE:
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********************************
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ioctl FE_ENABLE_HIGH_LNB_VOLTAGE
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********************************
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Name
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====
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FE_ENABLE_HIGH_LNB_VOLTAGE - Select output DC level between normal LNBf voltages or higher LNBf - voltages.
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Synopsis
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========
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.. cpp:function:: int ioctl( int fd, int request, unsigned int high )
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Arguments
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=========
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``fd``
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File descriptor returned by :ref:`open() <frontend_f_open>`.
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``request``
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FE_ENABLE_HIGH_LNB_VOLTAGE
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``high``
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Valid flags:
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- 0 - normal 13V and 18V.
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- >0 - enables slightly higher voltages instead of 13/18V, in order
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to compensate for long antenna cables.
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Description
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===========
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Select output DC level between normal LNBf voltages or higher LNBf
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voltages between 0 (normal) or a value grater than 0 for higher
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voltages.
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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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