[alsa-devel] CIP Discontinuity with snd-firewire-digi00x

[lin-alsa at noblejury.com]

Hi,

Here's the modinfo:

filename: 
/lib/modules/3.18.24-rt22-1-rt-lts/updates/dkms/snd-firewire-digi00x.ko
license:        GPL v2
author:         Takashi Sakamoto <o-takashi at sakamocchi.jp>
description:    Digidesign Digi 002/003 family Driver
alias:          ieee1394:ven0000A07Emo00000002sp*ver*
depends: 
snd-firewire-lib,firewire-core,snd-pcm,snd,snd-rawmidi,snd-hwdep
vermagic:       3.18.24-rt22-1-rt-lts SMP preempt mod_unload modversions

And uname -a for good measure:
Linux archon.umbc.edu 3.18.24-rt22-1-rt-lts #1 SMP PREEMPT RT Thu Nov 12 
22:45:45 CET 2015 x86_64 GNU/Linux

I know I compiled it from your git repo at one point in the past, and I 
think that is the version being used (I'm on a lts kernel).

Lin


On Sun, 5 Jun 2016, Takashi Sakamoto wrote:

> Hi,
>
> On Jun 5 2016 08:09, lin-alsa at noblejury.com wrote:
>> The relavent dmesg lines (dmesg | grep fire) are here: http://ix.io/OQ2.
>> I don't know if the first bit about the config rom has anything to do with
>> this, but I hope it helps, and the hex pairs are in that log.
>
> It's really my help, great ;)
>
>> Re: the clock issue, I'm not actually using optical in, if that's what
>> you mean. Please explain what you mean to me, I'm a bit confused as to
>> your question.
>
> Oops. I was dull just after waking up. (it's an exchange for the quick
> reply...)
>
> On Jun 5 2016 07:30, lin-alsa at noblejury.com wrote:
>> `Optical mode: adat
>> Sampling Rate: 88200
>> Clock Source: internal`
>
> Indeed, your unit is set to use internal clock signal as sampling clock.
> So no worry about the external signals, sorry.
>
>
> Well, as long as seeing your log, ALSA digi00x driver detects
> discontinuity of data block counter on incoming packets from the unit.
> (On IEEE 1394 bus, data is transferred as a form of packet.)
> Unfortunately, I cannot reproduce this situation with my unit.
>
> So I think there's two possibility:
> 1.We work with different drivers; i.e. based on different source code.
> 2.We work with different state of the unit; i.e. different firmware.
>
> At first, let's confirm the item 1. Could you explain where
> snd-firewire-digi00x comes from? Is it from any Linux distribution? Or
> you did handy install from somewhere such as my repository in github.com?
>
>
> Regards
>
> Takashi Sakamoto
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