[alsa-devel] [RFC][PATCH 00/15 v4] OXFW driver, a succesor to firewire-speakers

Clemens Ladisch clemens at ladisch.de
Tue Aug 12 09:09:54 CEST 2014


Takashi Sakamoto wrote:
> On Aug 11 2014 00:54, Clemens Ladisch wrote:
>> The old driver configured nothing but the rate.  Is there any mechanism
>> to set the stream format?
>
> Yes. It's AV/C stream format information command.
> [...]
> But in this series of patches, I don't use this command. I expected the
> models to change stream format according to parameters in AMDTP packets
> such like the value of dbs field.

Apparently, the firmware doesn't support automatic format detection
completely, and requires this command for the 2ch 32/44.1 kHz modes.

(That 2ch at 96 kHz actually works is even more curious.  There already
is that bug regarding listing the seventh format; it's possible that
they completely forgot to report an eighth format.)


Regards,
Clemens


More information about the Alsa-devel mailing list