[linux-dvb] [PATCH 1/3] Fix a problem during the access to the IER and ISR registers of the SA7146

Oliver Endriss o.endriss at gmx.de
Thu Dec 28 18:03:48 CET 2006


Dominik Strasser wrote:
> Oliver Endriss schrieb:
> > Dominik Strasser wrote:
> >> what about the attached patch, to silence the other message (which also 
> >> swamped my logs after I've managed to silence this one) - see my other post.
> >
> > Basically I have no problem to change this message back to a debug
> > message if nothing else helps. On the other hand I don't understand why
> > I2C timeouts might occur during normal operation of the driver.
> >
> > Please try a lower I2C bitrate in the av7110 driver.
> > In av7110.c, line 2465, replace SAA7146_I2C_BUS_BIT_RATE_120 by
> > SAA7146_I2C_BUS_BIT_RATE_240. Does this help?
> >   
>
> sorry, this doesn't help fully. I still see the message but very 
> infrequently. It occurs something like twice per minute. Before it was 
> every second. Maybe this is OK then ?

Imho it should not occur during normal operation.
In my syslog I cannot find a single message...

You could try to further reduce i2c speed (SAA7146_I2C_BUS_BIT_RATE_360).

I wonder whether there is some broken hardware which causes noise on the
i2c bus (a broken power supply for example).

Can you test the card on a different computer?

Oliver

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