From: Andy Walls <awalls@md.metrocast.net>
To: Martin Dauskardt <martin.dauskardt@gmx.de>
Cc: linux-media@vger.kernel.org
Subject: Re: radio tuner but no V4L2_CAP_RADIO ?
Date: Sun, 13 Feb 2011 16:35:56 -0500 [thread overview]
Message-ID: <1297632956.2401.11.camel@localhost> (raw)
In-Reply-To: <201102132039.07632.martin.dauskardt@gmx.de>
On Sun, 2011-02-13 at 20:39 +0100, Martin Dauskardt wrote:
> The following cards have a Multi Standard tuner with radio:
> KNC One TV-Station DVR (saa7134) FMD1216MEX
> HVR1300 (cx88-blackbird) Philips FMD1216ME
> /dev/radio0 is present and working.
>
> Both drivers do not report the radio when using VIDIOC_QUERYCAP.
>
> Is this a bug, or is there no clear specification that a driver must report
> this?
The V4L2 API spec is unclear on this subject in most places, but it is
*very* clear here:
http://linuxtv.org/downloads/v4l-dvb-apis/radio.html#id2682669
"Devices supporting the radio interface set the V4L2_CAP_RADIO and
V4L2_CAP_TUNER or V4L2_CAP_MODULATOR flag in the capabilities field of
struct v4l2_capability returned by the VIDIOC_QUERYCAP ioctl."
Those drivers have bugs.
Regards,
Andy
> Is there are any other way to check radio for support (besides trying to open
> a matching radio device) ?
> --
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prev parent reply other threads:[~2011-02-13 21:35 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-02-13 19:39 radio tuner but no V4L2_CAP_RADIO ? Martin Dauskardt
2011-02-13 21:35 ` Andy Walls [this message]
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