[linux-sunxi] Re: tv-in documentation from allwinner?

2015-05-29 Thread Stefan Monnier
 the lack of parts (DVB tuners) that can feed a TS to the A20 so no 
 proper integration with a DVB linux subsystem has been done.

Oh, I missed the fact that the onboard part only does the TS part.
If you need an external tuner, then indeed it's probably not worth
the trouble.


Stefan

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[linux-sunxi] Re: tv-in documentation from allwinner?

2015-05-28 Thread Stefan Monnier
 There is quite a bit of documentation on the MPEG-TS part.  And some
 people have been looking into writing a driver, but lack of commonly
 available hardware to develop on slows things down.

I suspect that lack of driver for that part is also a reason for the
lack of boards that provide access to the DVB functionality :-(

With good mali+cedar+ts drivers, the A20 would be a great platform to
run Kodi, but sadly none of those three has seen much activity.


Stefan

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[linux-sunxi] Re: tv-in documentation from allwinner?

2015-05-28 Thread Andrea Venturi


On Thursday, May 28, 2015 at 9:39:11 PM UTC+2, Stefan Monnier wrote:

  There is quite a bit of documentation on the MPEG-TS part.  And some 
  people have been looking into writing a driver, but lack of commonly 
  available hardware to develop on slows things down. 

 I suspect that lack of driver for that part is also a reason for the 
 lack of boards that provide access to the DVB functionality :-( 


yeah, but i suspect the problem is the other way around..

the lack of parts (DVB tuners) that can feed a TS to the A20 so no 
proper integration with a DVB linux subsystem has been done.

as far as i can see there are some choices:

* ready to go but expensive: NIMs from Sr-systems 
http://sr-systems.de/content.php?show=Produktelng=engstyle=std
they showcase the proper busses TS+I2C for being driven by a sunxi card 
(but they are professional gears: 100€ or so for such a card)..

* Extension card for the Octopus Digital Devices DVB bridge: i really 
suppose this too is based on link with TS+I2C between base DVB bridge card 
to PCI express and extension (DVB tuners/ CI modules..) BUT some 
investigation still needed: 
http://www.digitaldevices.de/english/Octopus_PCIe_Bridge.html

* _slightly_ less expensive but with high hacking value :-) , the 
Hauppauge Triplestick, pretty powerful USB DVB dongle composed of two 
boards, one is the DVB tuner and the other is the USB driver, here a good 
naked review:
 http://blog.palosaari.fi/2014/04/naked-hardware-15-pctv-triplestick-292e.html 


if you desolder the _tiny_connector (1mm step IIRC), you can again have the 
TS+I2C (+VCC/GND) stuff. the SiLabs tuner/demod is pretty unknown as there 
are no PDF freely available, but powerful, and it's already supported by 
Linux, so you could use the dongle as it is, through USB, and save the 
effort to link it to the DVB Allwinner subsystem..

that was the best i could put together, but maybe other can share other 
solutions. of course i've no economic interest in any of these vendors. and 
sorry if we have hijacked the analog tv decoder main topic! 

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[linux-sunxi] Re: tv-in documentation from allwinner?

2015-05-25 Thread Rosimildo DaSilva
This is AW at its best! Selling H/W and not providing the proper 
documentation or even source code showing how the H/W block works!

It is no coincidence that many people simply gave up on all this totally 
lost company called All Winner.

R

On Monday, May 25, 2015 at 12:45:47 PM UTC-5, euge sobrino wrote:

 I need to decode a analog signal, but i cannot see any reference nor 
 documentation of the 4 TVIN pins of A20.  I Even see cubietruck has the 
 connector attached but no references. Am I missing anything or is another 
 undocumented stuff from allwinner.

 Thanks


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