[alsa-devel] Toneweal / Trigaudio FW66 device

[Daniel Jozsef]

Hey,

Thanks a lot. That does sound pretty strange. Thankfully, I'm in no hurry
as I'm still mainly using an older Mac for audio stuff, but I'd like to
replace it sooner or later, and getting an upgradable Linux machine sounds
better than paying 1.5 to 2 times as much for a Mac with the same specs
(and no extensibility).

I'll try to do some testing around on my current Linux box. Unfortunately
it's an old machine with a "known problematic" Firewire implementation,
though I doubt that should play a part in device discovery.

Daniel

On Wed, Jan 29, 2020 at 4:16 AM Takashi Sakamoto <o-takashi at sakamocchi.jp>
wrote:

> Hi,
>
> On Tue, Jan 28, 2020 at 10:28:20PM +0000, Daniel Jozsef wrote:
> > I'm a little baffled by what my device just did. :P
> >
> > $ ./firewire-request /dev/fw1 fcp 0x016002c0000100ffff00
> > response: 000: 0c 60 02 c0 00 01 00 ff ff 00 00
> .`.........
> > $ ./firewire-request /dev/fw1 fcp 0x016002c0000101ffff00
> > response: 000: 0c 60 02 c0 00 01 01 ff ff 00 00
> .`.........
> > (<- didn't fail)
> > $ ./firewire-request /dev/fw1 fcp 0x016002c0000102ffff00
> > response: 000: 0c 60 02 c0 00 01 02 ff ff 00 00
> .`.........
> > $ ./firewire-request /dev/fw1 fcp 0x016002c0000103ffff00
> > response: 000: 0c 60 02 c0 00 01 03 ff ff 00 00
> .`.........
> > $ ./firewire-request /dev/fw1 fcp 0x016002c0000104ffff00
> > response: 000: 0c 60 02 c0 00 01 04 ff ff 00 02
> .`.........
> > (<- didn't fail)
> >
> > In fact...
> >
> > $ ./firewire-request /dev/fw1 fcp 0x016002c0000105ffff00
> > response: 000: 0c 60 02 c0 00 01 05 ff ff 00 03
> .`.........
> > $ ./firewire-request /dev/fw1 fcp 0x016002c0000106ffff00
> > response: 000: 08 60 02 c0 00 01 06 ff ff 00                   .`........
> > (<- shorter)
> > $ ./firewire-request /dev/fw1 fcp 0x016002c0000107ffff00
> > response: 000: 08 60 02 c0 00 01 07 ff ff 00                   .`........
> > $ ./firewire-request /dev/fw1 fcp 0x016002c00001ffffff00
> > response: 000: 08 60 02 c0 00 01 ff ff ff 00                   .`........
> > (<-srsly?)
> >
> > As for the second batch:
> >
> > $ ./firewire-request /dev/fw1 fcp 0x016002c0010100ffff00
> > response: 000: 0c 60 02 c0 01 01 00 ff ff 00 00
> .`.........
> > $ ./firewire-request /dev/fw1 fcp 0x016002c0010101ffff00
> > response: 000: 0c 60 02 c0 01 01 01 ff ff 00 00
> .`.........
> > (<- didn't fail)
> >
> > So again...
> >
> > $ ./firewire-request /dev/fw1 fcp 0x016002c0010102ffff00
> > response: 000: 0c 60 02 c0 01 01 02 ff ff 00 00
> .`.........
> > $ ./firewire-request /dev/fw1 fcp 0x016002c0010103ffff00
> > response: 000: 0c 60 02 c0 01 01 03 ff ff 00 02
> .`.........
> > $ ./firewire-request /dev/fw1 fcp 0x016002c0010104ffff00
> > response: 000: 0c 60 02 c0 01 01 04 ff ff 00 03
> .`.........
> > $ ./firewire-request /dev/fw1 fcp 0x016002c0010105ffff00
> > response: 000: 08 60 02 c0 01 01 05 ff ff 00                   .`........
> > (<- shorter)
> > $ ./firewire-request /dev/fw1 fcp 0x016002c0010106ffff00
> > response: 000: 08 60 02 c0 01 01 06 ff ff 00                   .`........
> > $ ./firewire-request /dev/fw1 fcp 0x016002c001010fffff00
> > response: 000: 08 60 02 c0 01 01 0f ff ff 00                   .`........
> >
> > Honestly I have no idea what is going on. :D
>
> It looks to work well.
>
> You tried for input plugs of audio subunit, thus the shorter
> response with 0x08 in the first byte (=NOT IMPLEMENTED) is
> expected for inquiry to 6th input plug.
>
> Hm. I guess your issue is a kind of Heisenbugs[1]. It seems to
> depend on case. To drill down the case in which the issue
> appears, I'd like you to investigate whether you can see the
> same log every time you run with libffado (jackd with Firewire
> backend, or ffado-dbus-server) or not:
>
> > Error (bebob_avplug.cpp)[ 237] discoverPlugType: Plug does not implement
> extended plug info plug type info command
> > Error (bebob_avplug.cpp)[ 120] discover: discover: Could not discover
> plug type (1,1,0,0,1)
>
>
> Additionally, I write a patch for ALSA bebob driver to support
> your device[2]. If you need a prompt solution to use the device in
> Linux-based system, it's available in topic branch of my remote
> repository. But it's required for you to study the way to update
> installed driver modules...
>
> I note that ALSA bebob driver supports transmission of audio frames
> and MIDI messages, thus it's not available to control internal DSP.
>
> [1] https://en.wikipedia.org/wiki/Heisenbug
> [2]
> https://github.com/takaswie/snd-firewire-improve/commit/1c9fabb7dd9de36ea829700df7eb13a40393a679
> [3] https://github.com/takaswie/snd-firewire-improve/tree/topic/fw66
>
>
> Regards
>
> Takashi Sakamoto
>