[asterisk-dev] mISDN_dsp and the poll parameter

[Christian]

a.spadaccini at mediatechnologies.it wrote:

>Hello everyone,
>I'm installing the mISDN drivers, and I noticed that the
>mISDN_dsp module won't load
>unless the poll parameter is a multiple of 80.
>
>  
>
This has something to do with the Timer Setup in your kernel config in
the CPU Section.

>So my questions are: why is it set to 128 by default?
>
Because the HFC Chip can only use multiples of 8 Bytes, but the dsp
would use multiple of 80 bytes when the Timerfreq = 100Hz, if you would
set it to either 250Hz or 1000Hz it would work with the same settings.

> Why
>isn't this mentioned in the 
>misdn-init.conf default configuration file? Should I file a
>bug?
>  
>
good point i will add different parameters for the hfc - poll and for
the dsp - poll in the misdn-init.conf, so that this is configureable.

If we would know from /proc or /sys which setting is enabled in the
kernel we could autogenerate a reasonable default value, but i don't
know yet if it's possible to find that out in userspace..