[mythtv-users] DVB delivery systems

[Stuart Auchterlonie]

On 21/09/15 12:29, Mike Perkins wrote:
> On 21/09/15 12:07, Stuart Auchterlonie wrote:
>> On 20/09/15 10:20, Devin Heitmueller wrote:
>>>> As I recall (it's been a while since I last configured my tuners) the
>>>> different standards (T vs. C) are exposed as different device nodes,
>>>> but
>>>> don't quote me on that.
>>>
>>> This only applies to devices where there are two separate demodulator
>>> chips in the device.  If the device has a single demod which supports
>>> both DVB-T and DVB-C, then it still gets represented as a single
>>> frontend device node and you have to tell it which mode to operate in.
>>>
>>> That said, I don't know whether MythTV ever got around to setting the
>>> delivery system.
>>>
>>
>> I'm pretty sure we are going to have to add explicit support for this.
>>
> Following up on my somewhat vague message above, I have now had the
> chance to access my backend and dmesg gives me:
> 
...
> ...
> 
> [   12.267085] tda18271 6-0060: creating new instance
> [   12.271685] TDA18271HD/C2 detected @ 6-0060
> [   12.526085] tda18271 6-0060: attaching existing instance
> [   12.526096] DVB: registering new adapter (em28xx #0)
> [   12.526106] DVB: registering adapter 2 frontend 0 (Sony CXD2820R
> (DVB-T/T2))...
> [   12.526313] DVB: registering adapter 2 frontend 1 (Sony CXD2820R
> (DVB-C))...
> [   12.533764] em28xx #0: Successfully loaded em28xx-dvb
> [   12.533775] Em28xx: Initialized (Em28xx dvb Extension) extension
> 

This is good, and makes your life easier, however i thought i'd check
out my new PCTV 292e and it only presents a single frontend.

So querying the frontend with dvb-fe-tools (part of v4l-utils)
I can see that it's reporting multiple supported delivery systems.

DVB API Version 5.10, Current v5 delivery system: DVBT
Supported delivery systems:
    [DVBT]
     DVBT2
     DVBC/ANNEX_A

We have a ticket open about non auto switching devices, of which
this is the prime example.

Cheers
Stuart