On 07/31/2015 04:10 AM, Antti Palosaari wrote: > Add brief description for tuner RF gain control. > > Cc: Hans Verkuil <hverkuil@xxxxxxxxx> Acked-by: Hans Verkuil <hans.verkuil@xxxxxxxxx> > Signed-off-by: Antti Palosaari <crope@xxxxxx> > --- > Documentation/DocBook/media/v4l/compat.xml | 4 ++++ > Documentation/DocBook/media/v4l/controls.xml | 14 ++++++++++++++ > Documentation/DocBook/media/v4l/v4l2.xml | 1 + > 3 files changed, 19 insertions(+) > > diff --git a/Documentation/DocBook/media/v4l/compat.xml b/Documentation/DocBook/media/v4l/compat.xml > index f56faf5..eb091c7 100644 > --- a/Documentation/DocBook/media/v4l/compat.xml > +++ b/Documentation/DocBook/media/v4l/compat.xml > @@ -2600,6 +2600,10 @@ and &v4l2-mbus-framefmt;. > <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> > > diff --git a/Documentation/DocBook/media/v4l/controls.xml b/Documentation/DocBook/media/v4l/controls.xml > index 6e1667b..7cae933 100644 > --- a/Documentation/DocBook/media/v4l/controls.xml > +++ b/Documentation/DocBook/media/v4l/controls.xml > @@ -5418,6 +5418,18 @@ set. Unit is in Hz. The range and step are driver-specific.</entry> > <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> > @@ -5425,6 +5437,8 @@ set. Unit is in Hz. The range and step are driver-specific.</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. > +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> > diff --git a/Documentation/DocBook/media/v4l/v4l2.xml b/Documentation/DocBook/media/v4l/v4l2.xml > index c9eedc1..ab9fca4 100644 > --- a/Documentation/DocBook/media/v4l/v4l2.xml > +++ b/Documentation/DocBook/media/v4l/v4l2.xml > @@ -156,6 +156,7 @@ applications. --> > <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. > </revremark> > </revision> > > -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
