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41018cb)
Add brief description for tuner RF gain control.
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
<constant>V4L2_TUNER_ADC</constant> is deprecated now.
</para>
</listitem>
<constant>V4L2_TUNER_ADC</constant> is deprecated now.
</para>
</listitem>
+ <listitem>
+ <para>Added <constant>V4L2_CID_RF_TUNER_RF_GAIN</constant>
+RF Tuner control.</para>
+ </listitem>
</orderedlist>
</section>
</orderedlist>
</section>
<row>
<entry spanname="descr">Enables/disables IF automatic gain control (AGC)</entry>
</row>
<row>
<entry spanname="descr">Enables/disables IF automatic gain control (AGC)</entry>
</row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_RF_TUNER_RF_GAIN</constant> </entry>
+ <entry>integer</entry>
+ </row>
+ <row>
+ <entry spanname="descr">The RF amplifier is the very first
+amplifier on the receiver signal path, just right after the antenna input.
+The difference between the LNA gain and the RF gain in this document is that
+the LNA gain is integrated in the tuner chip while the RF gain is a separate
+chip. There may be both RF and LNA gain controls in the same device.
+The range and step are driver-specific.</entry>
+ </row>
<row>
<entry spanname="id"><constant>V4L2_CID_RF_TUNER_LNA_GAIN</constant> </entry>
<entry>integer</entry>
<row>
<entry spanname="id"><constant>V4L2_CID_RF_TUNER_LNA_GAIN</constant> </entry>
<entry>integer</entry>
<entry spanname="descr">LNA (low noise amplifier) gain is first
gain stage on the RF tuner signal path. It is located very close to tuner
antenna input. Used when <constant>V4L2_CID_RF_TUNER_LNA_GAIN_AUTO</constant> is not set.
<entry spanname="descr">LNA (low noise amplifier) gain is first
gain stage on the RF tuner signal path. It is located very close to tuner
antenna input. Used when <constant>V4L2_CID_RF_TUNER_LNA_GAIN_AUTO</constant> is not set.
+See <constant>V4L2_CID_RF_TUNER_RF_GAIN</constant> to understand how RF gain
+and LNA gain differs from the each others.
The range and step are driver-specific.</entry>
</row>
<row>
The range and step are driver-specific.</entry>
</row>
<row>
<date>2015-05-26</date>
<authorinitials>ap</authorinitials>
<revremark>Renamed V4L2_TUNER_ADC to V4L2_TUNER_SDR.
<date>2015-05-26</date>
<authorinitials>ap</authorinitials>
<revremark>Renamed V4L2_TUNER_ADC to V4L2_TUNER_SDR.
+Added V4L2_CID_RF_TUNER_RF_GAIN control.