diff options
author | Antti Palosaari <crope@iki.fi> | 2015-10-10 12:50:59 -0400 |
---|---|---|
committer | Mauro Carvalho Chehab <mchehab@osg.samsung.com> | 2015-10-20 13:39:37 -0400 |
commit | b2411b93cdcb5cb154827b8fcd2f436dd0ddab73 (patch) | |
tree | 8d1b2c341cc16411b3a727e9156adb56f59a3e4e | |
parent | 41018cb84a9ed440db1508d67d9dd4084d5460eb (diff) |
[media] DocBook: document tuner RF gain control
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>
-rw-r--r-- | Documentation/DocBook/media/v4l/compat.xml | 4 | ||||
-rw-r--r-- | Documentation/DocBook/media/v4l/controls.xml | 14 | ||||
-rw-r--r-- | Documentation/DocBook/media/v4l/v4l2.xml | 1 |
3 files changed, 19 insertions, 0 deletions
diff --git a/Documentation/DocBook/media/v4l/compat.xml b/Documentation/DocBook/media/v4l/compat.xml index 08f4efcab4e9..6c4e95146d16 100644 --- a/Documentation/DocBook/media/v4l/compat.xml +++ b/Documentation/DocBook/media/v4l/compat.xml | |||
@@ -2600,6 +2600,10 @@ and &v4l2-mbus-framefmt;. | |||
2600 | <constant>V4L2_TUNER_ADC</constant> is deprecated now. | 2600 | <constant>V4L2_TUNER_ADC</constant> is deprecated now. |
2601 | </para> | 2601 | </para> |
2602 | </listitem> | 2602 | </listitem> |
2603 | <listitem> | ||
2604 | <para>Added <constant>V4L2_CID_RF_TUNER_RF_GAIN</constant> | ||
2605 | RF Tuner control.</para> | ||
2606 | </listitem> | ||
2603 | </orderedlist> | 2607 | </orderedlist> |
2604 | </section> | 2608 | </section> |
2605 | 2609 | ||
diff --git a/Documentation/DocBook/media/v4l/controls.xml b/Documentation/DocBook/media/v4l/controls.xml index 33aece541880..f13a429093f1 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> | |||
5418 | <entry spanname="descr">Enables/disables IF automatic gain control (AGC)</entry> | 5418 | <entry spanname="descr">Enables/disables IF automatic gain control (AGC)</entry> |
5419 | </row> | 5419 | </row> |
5420 | <row> | 5420 | <row> |
5421 | <entry spanname="id"><constant>V4L2_CID_RF_TUNER_RF_GAIN</constant> </entry> | ||
5422 | <entry>integer</entry> | ||
5423 | </row> | ||
5424 | <row> | ||
5425 | <entry spanname="descr">The RF amplifier is the very first | ||
5426 | amplifier on the receiver signal path, just right after the antenna input. | ||
5427 | The difference between the LNA gain and the RF gain in this document is that | ||
5428 | the LNA gain is integrated in the tuner chip while the RF gain is a separate | ||
5429 | chip. There may be both RF and LNA gain controls in the same device. | ||
5430 | The range and step are driver-specific.</entry> | ||
5431 | </row> | ||
5432 | <row> | ||
5421 | <entry spanname="id"><constant>V4L2_CID_RF_TUNER_LNA_GAIN</constant> </entry> | 5433 | <entry spanname="id"><constant>V4L2_CID_RF_TUNER_LNA_GAIN</constant> </entry> |
5422 | <entry>integer</entry> | 5434 | <entry>integer</entry> |
5423 | </row> | 5435 | </row> |
@@ -5425,6 +5437,8 @@ set. Unit is in Hz. The range and step are driver-specific.</entry> | |||
5425 | <entry spanname="descr">LNA (low noise amplifier) gain is first | 5437 | <entry spanname="descr">LNA (low noise amplifier) gain is first |
5426 | gain stage on the RF tuner signal path. It is located very close to tuner | 5438 | gain stage on the RF tuner signal path. It is located very close to tuner |
5427 | antenna input. Used when <constant>V4L2_CID_RF_TUNER_LNA_GAIN_AUTO</constant> is not set. | 5439 | antenna input. Used when <constant>V4L2_CID_RF_TUNER_LNA_GAIN_AUTO</constant> is not set. |
5440 | See <constant>V4L2_CID_RF_TUNER_RF_GAIN</constant> to understand how RF gain | ||
5441 | and LNA gain differs from the each others. | ||
5428 | The range and step are driver-specific.</entry> | 5442 | The range and step are driver-specific.</entry> |
5429 | </row> | 5443 | </row> |
5430 | <row> | 5444 | <row> |
diff --git a/Documentation/DocBook/media/v4l/v4l2.xml b/Documentation/DocBook/media/v4l/v4l2.xml index 01a24df92e1d..9cc4117644fc 100644 --- a/Documentation/DocBook/media/v4l/v4l2.xml +++ b/Documentation/DocBook/media/v4l/v4l2.xml | |||
@@ -156,6 +156,7 @@ applications. --> | |||
156 | <date>2015-05-26</date> | 156 | <date>2015-05-26</date> |
157 | <authorinitials>ap</authorinitials> | 157 | <authorinitials>ap</authorinitials> |
158 | <revremark>Renamed V4L2_TUNER_ADC to V4L2_TUNER_SDR. | 158 | <revremark>Renamed V4L2_TUNER_ADC to V4L2_TUNER_SDR. |
159 | Added V4L2_CID_RF_TUNER_RF_GAIN control. | ||
159 | </revremark> | 160 | </revremark> |
160 | </revision> | 161 | </revision> |
161 | 162 | ||