patch for lifeview hybrid mini
-------- Message original --------
Sujet: Re: patch for lifeview hybrid mini
Date : Tue, 24 Aug 2010 08:35:39 +0200
De : [email protected] <[email protected]>
Pour : hermann pitton <[email protected]>, [email protected], [email protected]
Quoted 3 lines · hermann pitton
Hello Thomas,
Hi hermann
Quoted 10 lines
the assumption is good then.
Latest revisions of the Lifeview cards do switch to radio mode with gpio21 high and let it low for TV. (it was the other way round previously)
I was just wondering, if it might have radio support at all, since gpio21 is not set in the m$ gpio mask and you say it does not come with radio software.
Quoted 8 lines
The gpio18 and 16 can trigger IRQs and are usually in use on such remotes for the button up/down signal and related IRQ sampling.
All saa7133/35/31e with tda8275ac and radio IF support use a special 7.5MHz ceramic filter, usually a huge well visible part in blue or orange color, but on latest designs they are hard to identify, since they might appear as SMD discrets now too.
it's hard to look because the card is covered by a metal plate and we don't want to break it.
Quoted 5 lines
The switch to this filter is often related to a an antenna connector RF input switch triggered by the same gpio, but not necessarily. All sort of combinations do exist.
good news :(
Quoted 9 lines
Anyway, we demodulate the radio IF from such tuners on the saa7133/35/31e on the saa chip and do also the stereo separation and detection there. Hartmut added the needed code in saa7134-tvaudio and it is valid for all tuner=54.
To achieve that, you need to use amux = TV for radio and likely also some gpio is involved for the RF routing.
Will look at this.
Many thanks.
Quoted 6 lines
Cheers,
Hermann
Best regards,
thomas