[linux-dvb] Problems with KNC1 DVB-C

Oliver Endriss o.endriss at gmx.de
Sun Apr 29 18:02:50 CEST 2007


Rudy Zijlstra wrote:
> Oliver Endriss wrote:
> > Rudy Zijlstra wrote:
> >   
> >> hi all,
> >>
> >> On kernel 2.6.19.1 the KNC1 is working correctly. On 2.6.20.1 and 
> >> 2.6.21-rc2 i get problems though, and the device is not fully loaded. 
> >> I've attached the dmesg output. Anybody an idea how to progress? I have 
> >> the feeling the i2c communicaton is not working correctly. How to solve 
> >> this?
> >>     
> >
> > Could you please test if it works again, if you replace
> >   SAA7146_USE_I2C_IRQ
> > by
> >   SAA7146_I2C_SHORT_DELAY
> > in budget-av.c?
> >
> > @all:
> > Can someone confirm this problem with card type 1894:0021
> > (KNC1 DVB-C Plus)?
> >
> > Oliver
> >
> >   
> I finally had time to return to this.
> 
> Find attached original dmesg output on 2.6.21.1 and result with above change

Apparently it works in polling mode, but not in interrupt mode. Why?

Can someone else confirm problems with this card type
(Terratec Cinergy 1200 DVB-C, sub-system 0x153b:0x1156)?

Now I consider the following options:
- Add a module parameter to disable irq mode.
- Turn off irq mode for card type 0x153b:0x1156.
- Turn off irq mode for the TDA10021 frontend.
- Revert to polling mode for all cards.
:-(

Any opinions?

CU
Oliver

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