Re: [PATCH] Multifrontend support for saa7134

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Am Dienstag, den 24.11.2009, 02:08 +0100 schrieb hermann pitton:
> Hi Mauro,
> 
> Am Montag, den 23.11.2009, 14:04 -0200 schrieb Mauro Carvalho Chehab:
> > Hi Lukáš/Hermann,
> > 
> > Any news about this patch? I'll mark it as RFC at the patchwork, since it seems that this is not finished yet. Please let me know if you make some progress.
> > 
> > > @@ -1352,6 +1353,7 @@ struct saa7134_board saa7134_boards[] =
> > >  		.tuner_addr     = ADDR_UNSET,
> > >  		.radio_addr     = ADDR_UNSET,
> > >  		 .mpeg           = SAA7134_MPEG_DVB,
> > > +		 .num_frontends  = 1,
> > >  		 .inputs         = {{
> > >  			 .name = name_tv,
> > >  			 .vmux = 1,
> > 
> > Just one suggestion here: it is a way better to assume that an "uninitialized" value (e. g. num_frontends = 0) for num_frontends to mean that just one frontend exists. This saves space at the initialization segment
> > of the module and avoids the risk of someone forget to add num_frontends=0.
> > 
> > cheers,
> > Mauro.
> 
> I currently don't have time to work on it and Lukáš' time is also
> limited.
> 
> We stay in contact and I can provide a device not yet working for me to
> him, if he wants. I'll keep you posted. You can have one too ;)
> 
> Currently the hardware reset in saa7134-dvb.c seems to break tda8275a
> hybrid tuners on my saa7131e devices for DVB-T. This is not restricted
> to the devices with multiple frontends, but also hits such with single
> frontend only. The TRIO has two tda8275a, they are not in use as hybrid
> tuners and don't need extra initialization again, that might be the
> difference.
> 
> We should avoid such saa7133 hardware reset on those cards not needing
> it in any case, means all with single frontend.

Or find a solution for this ridiculous "frontend is superior over the
bridge" going on since years against any common sense and claiming to
cover hybrid stuff too, imposing total nonsense on all such interested. 

> ON DVB-S is also a regression visible, in one of two cases needs a
> second tuning attempt now and it also seems to be related to the
> hardware reset, since without works fine like previously.
> 
> Patch is not ready yet for inclusion.

Getting hands dirty on what is around now on specs, that hardware reset
changes all gpios to be input on the bridge.

Of course nothing left after it for that five years work on such on that
dvb stuff. Mike proceed.

Cheers,
Hermann






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