From: Pavel Machek <pavel@ucw.cz>
To: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Cc: lgirdwood@gmail.com, broonie@kernel.org, perex@perex.cz,
tiwai@suse.de, patches@opensource.wolfsonmicro.com,
alsa-devel@alsa-project.org, linux-kernel@vger.kernel.org
Subject: Re: System with multiple arizona (wm5102) codecs
Date: Tue, 15 Sep 2015 10:35:52 +0200 [thread overview]
Message-ID: <20150915083552.GA14780@amd> (raw)
In-Reply-To: <20150915080648.GG11200@ck-lbox>
Hi!
> > > I must confess I haven't ever tested a system with two Arizona
> > > CODECs connected. Yes it seems you would get clashes on the
> > > regulator names, I guess that would need to be fixed up. If you
> > > were doing so wm831x-ldo.c would probably make a reasonable
> > > example.
> > >
> > > I guess you would need to be careful with the machine driver as
> > > well, you will need to use a snd_soc_codec_conf structure for at
> > > least one (although I would do both) of the CODECs to give a
> > > prefix for all the widget/control names, otherwise those will
> > > clash and everything will probably behave very strangely. See
> > > sound/soc/samsung/bells.c for an example doing this for wm9081.
> > >
> > > Those are the only two things that spring to mind at the moment
> > > but keep me informed on how you are getting on and I will let you
> > > know if I can come up with any other traps.
> >
> > It seems that davinci-evm takes data from device tree, but then uses
> > statically-allocated evm_soc_card, which would lead to problems in
> > dual-codec config....?
>
> That somewhat depends on how you plan on doing things. I had
> assumed you would be having a single machine driver with both
> CODECs connected to it, in which case the statically allocated
> snd_soc_card wouldn't be a problem. However, if you wanted to
> have two seperate machine drivers with a single CODEC connected
> to each then you would have an issue.
>
> I guess either approach is reasonable and probably just depends
> on what your end goal is.
The way dts is set up in my case, I ended up with two
snd_soc_cards. It seems to work for me now (on old kernel and with
some rather extreme hacks).
I'll most likely clean it up and get into mainline-ready form, but it
will take some time. If you want to see the ugly patches, let me know.
Thanks and best regards,
Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
next prev parent reply other threads:[~2015-09-15 8:35 UTC|newest]
Thread overview: 65+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-09-14 11:54 System with multiple arizona (wm5102) codecs Pavel Machek
2015-09-14 11:52 ` Charles Keepax
2015-09-14 11:52 ` Charles Keepax
2015-09-14 13:31 ` Charles Keepax
2015-09-14 13:31 ` Charles Keepax
2015-09-14 20:11 ` Pavel Machek
2015-09-15 6:18 ` Pavel Machek
2015-09-15 8:06 ` Charles Keepax
2015-09-15 8:06 ` Charles Keepax
2015-09-15 8:35 ` Pavel Machek [this message]
2015-09-15 13:56 ` [alsa-devel] " Caleb Crome
2015-09-15 13:56 ` Caleb Crome
2015-09-15 14:09 ` [alsa-devel] " Mark Brown
2015-09-15 14:09 ` Mark Brown
2015-09-15 15:26 ` [alsa-devel] " Caleb Crome
2015-09-19 18:21 ` Mark Brown
2015-09-21 12:36 ` Pavel Machek
2015-10-12 9:00 ` multi-codec support for arizona-ldo1 was " Pavel Machek
2015-10-12 11:37 ` Charles Keepax
2015-10-12 11:37 ` Charles Keepax
2015-11-30 11:33 ` multi-card support for davinci-evm Pavel Machek
2015-11-30 11:37 ` multi-card support for arizona-core Pavel Machek
2015-11-30 11:37 ` Pavel Machek
2015-11-30 11:54 ` Mark Brown
2015-10-12 15:47 ` multi-codec support for arizona-ldo1 was Re: System with multiple arizona (wm5102) codecs Mark Brown
2015-10-12 20:11 ` Pavel Machek
2015-10-13 11:53 ` Mark Brown
2015-10-13 11:53 ` Mark Brown
2015-11-13 21:58 ` Pavel Machek
2015-11-13 22:53 ` Mark Brown
2015-11-14 7:44 ` Pavel Machek
2015-11-14 7:44 ` Pavel Machek
2015-11-14 12:39 ` Mark Brown
2015-11-14 17:59 ` Pavel Machek
2015-11-14 17:59 ` Pavel Machek
2015-11-14 18:49 ` Mark Brown
2015-11-14 21:16 ` Pavel Machek
2015-11-14 21:16 ` Pavel Machek
2015-11-15 0:14 ` Mark Brown
2015-11-15 0:14 ` Mark Brown
2015-11-16 7:45 ` Pavel Machek
2015-11-16 10:50 ` Mark Brown
2015-11-16 12:29 ` Pavel Machek
2015-11-16 12:29 ` Pavel Machek
2015-11-16 13:57 ` Charles Keepax
2015-11-16 13:57 ` Charles Keepax
2015-11-16 14:28 ` Charles Keepax
2015-11-16 14:28 ` Charles Keepax
2015-11-16 17:33 ` Mark Brown
2015-11-16 14:11 ` Charles Keepax
2015-11-16 14:11 ` Charles Keepax
2015-11-22 6:51 ` Pavel Machek
2015-11-22 6:51 ` Pavel Machek
2015-11-23 8:18 ` Lee Jones
2015-11-23 8:18 ` Lee Jones
2015-11-23 10:11 ` Pavel Machek
2015-11-23 10:25 ` Richard Fitzgerald
2015-11-23 10:25 ` Richard Fitzgerald
2015-11-23 11:30 ` Mark Brown
2015-11-23 11:46 ` Charles Keepax
2015-11-23 11:46 ` Charles Keepax
2015-11-23 14:31 ` Lee Jones
2015-11-23 15:00 ` Pavel Machek
2015-11-16 14:05 ` Charles Keepax
2015-11-16 14:05 ` Charles Keepax
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