[linux-dvb] Re: Howto setup a multicast network connection?

[Holger Kiehl <Holger.Kiehl@dwd.de>]

On Mon, 23 Jun 2003, Holger Waechtler wrote:

> Holger Kiehl wrote:
> > On Tue, 17 Jun 2003, Holger Waechtler wrote:
> > 
> > 
> >>Holger Kiehl wrote:
> >>
> >>>If I poweroff the machine and start it again I no longer get this error.
> >>>With a soft reboot I always get 'No such device' error. Someone else
> >>>also reported the same behaviour.
> >>
> >>good, please let us know when you can find out more what register 
> >>setting exactly causes this problem.
> >>
> > 
> > I will need some help here since the three drivers just differ to much.
> > 
> > 
> >>>In the meantime I have also tried the driver from the KNC1, which is
> >>>is a branch from the linuxtv driver and they call it DVB-ANDI. This does
> >>>not have the problem with soft reboots and I do manage to receive some
> >>>multicast packages, but I loose a lot. This time there are lots of
> >>>the following messages in /var/log/messages:
> >>
> >>Can you please analyze the register settings of this driver a bit more 
> >>in detail if this one is working reliably?
> >>
> > 
> > Attached you will find the register settings for all three drivers,
> > DVB-ANDI, Metzler and linuxtv. Please give me some hints which registers
> > I should change or focus on. What I already tried before I put in the
> > printk() messages, to set init_tab of the linuxtv the same as DVB-ANDI,
> > but there was no change.
> 
> (well, that's exactly the challenge: find out which setting exactly 
> causes the problem - ;)
> 
> Hmm, I'd start searching at the PLL bytes (the 4- or 5-byte-string 
> written in pll_write() or tuner.c or whereever - ), the tuner/syntesizer 
> is usually pretty sensitive for misconfiguration.
> 
> Maybe that's exactly the problem: your log shows
> stv0299.c: setup for tuner BSRU6, TDQB-S00x
> DVB: registering frontend 0:0 (STV0299/TSA5059/SL1935 based)...
> 
> but probe_tuner() should dump something like
> stv0299.c: setup for tuner SU1278/SH
> DVB: registering frontend 0:0 (STV0299/TSA5059/SL1935 based)...
> 
> for the KNC-1 (you have a SU1278SH soldered on your board, right?).
> 
Correct.

> Maybe just the probing code is broken -- you can test this by hardcoding 
> the return value of probe_tuner() to PHILIPS_SU1278SH. If so we'll 
> probably have to check the name string to detect the tuner.
> 
It's now hardcoded, but szap does not get a lock and kdvb is eating a lot
of cpu time. Between, i2c->xfer() returns a -121.

Holger (Kiehl)



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