Re: RME AES32 & MADI

[Winfried Ritsch <ritsch@iem.at>]

Hello,

Am Freitag, 2. Februar 2007 19:39 schrieb Takashi Iwai:
> At Wed, 31 Jan 2007 13:11:48 +0100,
>
> Remy Bruno wrote:
> > Hello,
> >
> > I have been working on the AES32 and will soon provide a patch to get it
> > (hopefully) fully operational (hdspm code).
> >
> > Moreover, I also worked on the MADI card, but the original hdspm driver
> > didn't work for me (ie the code before my modifications to support
> > AES32). I had to deal with the following points:
> >   - it needed the DDS feature (clock divisor), as for the AES32 and
> > hdsp9632 cards (this may be a new behavior for recent cards)
> >   - the channel map needed to always be channel_map_madi_ss (and never
> >     channel_map_madi_ds, even at 96k), as for AES32. Otherwise, the
> > routing was not correct.
> >   - not enough DMA memory was beeing allocated (only for
> >     "params_channels(params)" channels whereas it should be allocated for
> > all the channels, otherwise it didn't work at 96kHz) (alsa-lib was
> > complaining, so I don't think an old MADI card would work either)
> >   - I had to play with the channel and rate rules
> >     (snd_hdspm_hw_rule_channels_rate and so on) to get it working. Not
> >     completely clear to me how it works but it didn't work as it was
> >
> > So here come my questions:
> >   - Was the MADI driver completely fonctionnal before now? In other
> > words, maybe an older revision of the card was working as the code
> > suggested (ie differently than the revision I have, which is 204), can
> > anyone confirm this?
>
> The early version has surely worked, IIRC.
> But, Winfried should know better....
>
Yes we are still working with MADI-Cards, on early version one version Rev 1.1 
and a newer card. The only thing is, that there are some troubles with  the 
correct Statusinformation, which are not functional limiting the card. 

We did not test DS mode extensively, but i can think of I tested it once MADI  
to MADI and it worked. 

> >   - As a corollary: should I keep the compatibility with the old code? IE
> > keep using channel_map_madi_ds, etc. for revisions < 204?
>
> Well, the only question is whether it breaks the older models.
>
If you post a patch or code so I can test it on old cards, it should be OK if 
you change this.

BTW:
Also I never finished to make a memory map interface for the mixer and meters, 
since it needs 16384 Bytes Mixer and the same for meters of values to copy, 
which is more ctl-interface can transfer at one time. Should we work on that, 
or everybody uses individual access to fader and meters for the software ?

mfg
   winfried

-- 
--
- ao.Univ.Prof. DI Winfried Ritsch 
- ritsch@iem.at - http://iem.at/ritsch
- Institut fuer Elektronische Musik und Akustik
- University of Music and Dramatic Art Graz
- Tel. ++43-316-389-3510 (3170) Fax ++43-316-389-3171 
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--

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