[linux-dvb] Re: Transponder switching taking considerably longer

[Oliver Endriss <o.endriss@gmx.de>]

On Friday 25 July 2003 16:44, Klaus Schmidinger wrote:
> Oliver Endriss wrote:
> > ...I recently changed I2C bus speed from 10.3kHz to 275kHz to speed
> > up tuning and I2C firmware downloads. At least it does for me. ;-)
> >
> > Maybe this causes problems with some frontends if they need some
> > delays between tuning and status check. Or they cannot handle the
> > high speed reliably...
> >
> > Try to change
> >     SAA7146_I2C_BUS_BIT_RATE_120
> > back to
> >     SAA7146_I2C_BUS_BIT_RATE_3200
> > in saa7146_core.c. Does it make a difference?
>
> This results in
>
> Jul 25 16:41:44 video kernel: DVB: AV7111(0) - firm f0240009, rtsl
> b0250018, vid 71010068, app 8000261a Jul 25 16:41:44 video kernel:
> DVB: AV7111(0) - firmware supports CI link layer interface Jul 25
> 16:41:45 video kernel: av7110(0): adac type set to 0
> Jul 25 16:41:45 video kernel: Couldn't read from EEPROM: not there?
> ...
> and the screen stays black (the OSD works, though).

Argh, I think you have to increase the udelay(20) in saa7146.c line 1286 
for the lower speed. Try something like udelay(500).

Oliver


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