[mythtv-users] DVB delivery systems

[Mike Perkins]

On 21/09/15 14:15, John Pilkington wrote:
> 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:
>>
>> [   10.246892] Linux video capture interface: v2.00
>> [   10.255654] dib0700: loaded with support for 21 different device-types
>> [   10.256235] dvb-usb: found a 'Hauppauge Nova-T Stick' in warm state.
>> [   10.256379] dvb-usb: will pass the complete MPEG2 transport stream to
>> the software demuxer.
>> [   10.257499] DVB: registering new adapter (Hauppauge Nova-T Stick)
>> [   10.318566] em28xx: New device PCTV Systems PCTV 290e @ 480 Mbps
>> (2013:024f, interface 0, class 0)
>> [   10.318689] em28xx #0: chip ID is em28174
>> [   10.464567] DVB: registering adapter 0 frontend 0 (DiBcom 7000PC)...
>> [   10.625437] em28xx #0: Identified as PCTV nanoStick T2 290e (card=78)
>> [   10.674933] DiB0070: successfully identified
>> [   10.700072] Registered IR keymap rc-pinnacle-pctv-hd
>> [   10.700327] input: em28xx IR (em28xx #0) as
>> /devices/pci0000:00/0000:00:02.1/usb1/1-3/rc/rc0/input3
>> [   10.700526] rc0: em28xx IR (em28xx #0) as
>> /devices/pci0000:00/0000:00:02.1/usb1/1-3/rc/rc0
>> [   10.700934] em28xx #0: v4l2 driver version 0.1.3
>> [   10.705740] em28xx #0: V4L2 video device registered as video0
>> [   10.705813] usbcore: registered new interface driver em28xx
>> [   10.705818] em28xx driver loaded
>> [   10.724077] Registered IR keymap rc-dib0700-rc5
>> [   10.724445] input: IR-receiver inside an USB DVB receiver as
>> /devices/pci0000:00/0000:00:02.1/usb1/1-5/rc/rc1/input4
>> [   10.725229] rc1: IR-receiver inside an USB DVB receiver as
>> /devices/pci0000:00/0000:00:02.1/usb1/1-5/rc/rc1
>> [   10.725453] dvb-usb: schedule remote query interval to 50 msecs.
>> [   10.725463] dvb-usb: Hauppauge Nova-T Stick successfully initialized
>> and connected.
>> [   10.725573] dib0700: rc submit urb failed
>> [   10.725578]
>> [   10.728662] dvb-usb: found a 'Hauppauge Nova-T Stick' in warm state.
>> [   10.728847] dvb-usb: will pass the complete MPEG2 transport stream to
>> the software demuxer.
>> [   10.730125] DVB: registering new adapter (Hauppauge Nova-T Stick)
>> [   10.940322] DVB: registering adapter 1 frontend 0 (DiBcom 7000PC)...
>>
>> ...
>>
>> [   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
>>
>> It's not clear from the order of messages since it appears to be
>> initializing three tuners at once but I'm guessing the (DVB-T/T2) and
>> (DVB-C) messages refer to the pc-290e, proving it has separate endpoints
>> for those modes.
>>
>
> I can't comment on relevance to the subject line, but my *buntu trusty laptop
> has a single 290e, and dmesg differs:
>
>    22.269388] em28174 #0: V4L2 video device registered as video0
> [   22.269395] em28174 #0: dvb set to isoc mode.
> [   22.269808] usbcore: registered new interface driver em28xx
> [   22.291627] tda18271 7-0060: creating new instance
>
>
>    22.543767] DVB: registering new adapter (em28174 #0)
> [   22.543780] usb 2-1: DVB: registering adapter 0 frontend 0 (Sony CXD2820R)...
> [   22.544293] em28174 #0: Successfully loaded em28xx-dvb
>
> John P
>
Are those different drivers registering the same device? My setup is pure Debian 
Wheezy.

-- 

Mike Perkins