[alsa-devel] [RFC][PATCH 0/8] A new driver for OXFW970/971 based devices

Takashi Sakamoto o-takashi at sakamocchi.jp
Mon Jan 6 09:33:47 CET 2014

Hi Iwai-san,

 >> 1.snd-firewire-speakers and snd-oxfw
 > I don't see why these make things difficult to merge?
 > They sound rather like the functionalities don't conflict.

I think it better not to touch existed drivers unless they have some bugs.

Actually I can merge two drivers with some selection statements, many 
changes for card structure and for PCM functionality, many codes for 
MIDI and hwdep functionaloty. But for snd-firewire-speakers these 
modifications are needless and not due to bugs.

...On the other hand, I also think it good to merge these two drivers 
because they support the same chipset. But this idea have a risk to put 
some new bugs into snd-firewire-speakers.

 > Note that since I haven't seen any ack from Clemens, I didn't take
 > previous patches yet.

Yes. I've posted my patches with RFC, without merge-request. I describe 
the reason.

Devices which snd-fireworks, snd-bebob and snd-oxfw supports are 
categorized in 'GenericAVC' by FFADO. This means the devices are 
controlled by the same way, AV/C commands. At first, I considered to 
develop 'snd-genericavc', which perform like OS X implementation. But 
there were some anxieties for device quirks.

In this reason, I decide to develop them in the same time. As a result, 
I confirm each chipset/firmware has it own quirk. So now I have a 
confidence that it's difficult to develop 'snd-genericavc'.

 >  And it's a bit too late for 3.14, we have plenty of time for review 
and discussion for 3.15.

Currently I have no will to merge my patches because I need more 
discussions between ALSA/FFADO developers.

My patches add ALSA to handle devices which FFADO supports  for its 
streaming functionality. It may bring a bit complexity to users. I need 
to adjust two projects in advance of merge-request.


Takashi Sakamoto
o-takashi at sakamocchi.jp

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