From: Antti Palosaari <crope@iki.fi>
To: Hans Verkuil <hverkuil@xs4all.nl>, linux-media@vger.kernel.org
Subject: Re: [PATCHv3 12/13] DocBook: fix S_FREQUENCY => G_FREQUENCY
Date: Tue, 11 Aug 2015 05:55:16 +0300 [thread overview]
Message-ID: <55C96414.3050805@iki.fi> (raw)
In-Reply-To: <55C871B9.2080207@xs4all.nl>
On 08/10/2015 12:41 PM, Hans Verkuil wrote:
> On 07/31/2015 04:10 AM, Antti Palosaari wrote:
>> It is VIDIOC_G_FREQUENCY which does not use type to identify tuner,
>> not VIDIOC_S_FREQUENCY. VIDIOC_S_FREQUENCY uses both tuner and type
>> fields. One of these V4L API weirdness...
>
> Actually, that's not what this is about. It's about whether g/s_frequency gets/sets
> the frequency for the tuner or the modulator. That has nothing to do with the tuner
> and type fields. The problem described here in the spec is a problem for both G and
> S_FREQUENCY.
ah, now I think I see it. There is no tuner type for FM radio modulator
- but instead it is capability of tuner type V4L2_TUNER_RADIO. As both
radio receiver and transmitter has same tuner type it is not possible to
identify it using tuner type...
regards
Antti
--
http://palosaari.fi/
next prev parent reply other threads:[~2015-08-11 2:55 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
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 [this message]
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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