radio tuner but no V4L2_CAP_RADIO ?

radio tuner but no V4L2_CAP_RADIO ?

[Martin Dauskardt]

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?

Is there are any other way to check radio for support (besides trying to open 
a matching radio device) ?

Re: radio tuner but no V4L2_CAP_RADIO ?

[Andy Walls]

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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