mirror of https://gitee.com/openkylin/linux.git
33 lines
1.2 KiB
ReStructuredText
33 lines
1.2 KiB
ReStructuredText
.. Permission is granted to copy, distribute and/or modify this
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.. document under the terms of the GNU Free Documentation License,
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.. Version 1.1 or any later version published by the Free Software
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.. Foundation, with no Invariant Sections, no Front-Cover Texts
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.. and no Back-Cover Texts. A copy of the license is included at
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.. Documentation/media/uapi/fdl-appendix.rst.
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..
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.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections
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.. _dvb-fe-read-status:
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***************************************
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Querying frontend status and statistics
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***************************************
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Once :ref:`FE_SET_PROPERTY <FE_GET_PROPERTY>` is called, the
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frontend will run a kernel thread that will periodically check for the
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tuner lock status and provide statistics about the quality of the
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signal.
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The information about the frontend tuner locking status can be queried
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using :ref:`FE_READ_STATUS`.
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Signal statistics are provided via
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:ref:`FE_GET_PROPERTY`.
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.. note::
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Most statistics require the demodulator to be fully locked
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(e. g. with :c:type:`FE_HAS_LOCK <fe_status>` bit set). See
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:ref:`Frontend statistics indicators <frontend-stat-properties>` for
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more details.
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