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

[Holger Waechtler <holger@qanu.de>]

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.
>  
If I remember correctly this delay was only required for a few 
particular demods, thus the demod driver should be the better place...

Holger