[linux-dvb] Re: Tuning problems with the refactored drivers

[Andrew de Quincey <adq_dvb@lidskialf.net>]

On Sunday 17 Oct 2004 23:52, Andrew de Quincey wrote:
> > First it tuned pretty badly. (Only 30 channels or so found) but after
> > that I added the mdelay(200)
> > command to line 116 of ves1820.c method ves1820_setup_reg0 and it
> > started to tune channels very well.
> > Now it can even find channels from out national tv channel! So maybe the
> > mdelay-line should also be added in the
> > CVS? (mdelay(50) got removed when you removed that hack)
> >
> >     ves1820_writereg(state, 0x00, reg0 & 0xfe);
> >     ves1820_writereg(state, 0x00, reg0 | 0x01);
> >     mdelay(200);                                                      //
> > this is the new line!
>
> Does setting the dvb_override_tune_delay parameter to 200 have the same
> effect as doing this? Its just that there is a mechanism defined for
> solving exactly this problem which I would prefer to use rather than
> putting an mdelay in the frontend itself.
>
> Glad to hear its getting better!
>
> > Is this ms line btw. CPU speed dependent. (Would slow PC's require
> > longer delay and faster one shorter?)
>
> It shouldn't do - the demod has its own clock.

Oops - misunderstood you. No, mdelay is in milliseconds, so it doesn't matter 
what the CPU speed is.