From: Hans Verkuil <hverkuil@xs4all.nl>
To: Antti Palosaari <crope@iki.fi>, linux-media@vger.kernel.org
Subject: Re: [PATCHv3 03/13] DocBook: document tuner RF gain control
Date: Mon, 10 Aug 2015 10:57:45 +0200 [thread overview]
Message-ID: <55C86789.60404@xs4all.nl> (raw)
In-Reply-To: <1438308650-2702-4-git-send-email-crope@iki.fi>
On 07/31/2015 04:10 AM, Antti Palosaari wrote:
> Add brief description for tuner RF gain control.
>
> Cc: Hans Verkuil <hverkuil@xs4all.nl>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
> Signed-off-by: Antti Palosaari <crope@iki.fi>
> ---
> 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>
>
>
next prev parent reply other threads:[~2015-08-10 8:58 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-07-31 2:10 [PATCHv3 00/13] SDR transmitter API Antti Palosaari
2015-07-31 2:10 ` [PATCHv3 01/13] v4l2: rename V4L2_TUNER_ADC to V4L2_TUNER_SDR Antti Palosaari
2015-07-31 2:10 ` [PATCHv3 02/13] v4l2: add RF gain control Antti Palosaari
2015-08-10 8:56 ` Hans Verkuil
2015-07-31 2:10 ` [PATCHv3 03/13] DocBook: document tuner " Antti Palosaari
2015-08-10 8:57 ` Hans Verkuil [this message]
2015-07-31 2:10 ` [PATCHv3 04/13] v4l2: add support for SDR transmitter Antti Palosaari
2015-07-31 2:10 ` [PATCHv3 05/13] DocBook: document " Antti Palosaari
2015-07-31 2:10 ` [PATCHv3 06/13] v4l: add type field to v4l2_modulator struct Antti Palosaari
2015-08-10 9:01 ` Hans Verkuil
2015-07-31 2:10 ` [PATCHv3 07/13] DocBook: add modulator type field Antti Palosaari
2015-08-10 9:02 ` Hans Verkuil
2015-07-31 2:10 ` [PATCHv3 08/13] hackrf: add control for RF amplifier Antti Palosaari
2015-08-10 9:03 ` Hans Verkuil
2015-07-31 2:10 ` [PATCHv3 09/13] hackrf: switch to single function which configures everything Antti Palosaari
2015-08-10 9:04 ` Hans Verkuil
2015-07-31 2:10 ` [PATCHv3 10/13] hackrf: add support for transmitter Antti Palosaari
2015-08-10 9:34 ` Hans Verkuil
2015-07-31 2:10 ` [PATCHv3 11/13] hackrf: do not set human readable name for formats Antti Palosaari
2015-07-31 2:10 ` [PATCHv3 12/13] DocBook: fix S_FREQUENCY => G_FREQUENCY Antti Palosaari
2015-08-10 9:41 ` Hans Verkuil
2015-08-11 2:55 ` Antti Palosaari
2015-07-31 2:10 ` [PATCHv3 13/13] DocBook: add tuner types SDR and RF for G_TUNER / S_TUNER Antti Palosaari
2015-08-10 9:43 ` Hans Verkuil
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