From: Lars-Peter Clausen <lars-Qo5EllUWu/uELgA04lAiVw@public.gmane.org>
To: Mark Brown <broonie-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
Cc: Jyri Sarha <jsarha-l0cyMroinI0@public.gmane.org>,
Jean-Francois Moine <moinejf-GANU6spQydw@public.gmane.org>,
devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
alsa-devel-K7yf7f+aM1XWsZ/bQMPhNw@public.gmane.org,
Xiubo Li <Li.Xiubo-KZfg59tc24xl57MIdRCFDg@public.gmane.org>,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Kuninori Morimoto
<kuninori.morimoto.gx-zM6kxYcvzFBBDgjK7y7TUQ@public.gmane.org>
Subject: Re: [alsa-devel] [PATCH v3 4/4] ASoC: simple-card: Add DT documentation for multi-DAI links
Date: Wed, 19 Mar 2014 20:31:45 +0100 [thread overview]
Message-ID: <5329F0A1.8020801@metafoo.de> (raw)
In-Reply-To: <20140319192157.GW11706-GFdadSzt00ze9xe1eoZjHA@public.gmane.org>
On 03/19/2014 08:21 PM, Mark Brown wrote:
> On Wed, Mar 19, 2014 at 09:15:14PM +0200, Jyri Sarha wrote:
>> On 03/19/2014 08:51 PM, Lars-Peter Clausen wrote:
>
>>> When does this make sense? Either the bitclock is inverted for all of
>>> them or for none.
>
>> Definition of clock signal and it's inversion varies between chip
>> manufacturers and sometimes it may not be possible to get all the dai
>> drivers to work identically in this respect. Because of this in some cases
>> there may be a need to set the inversion bit only at one end of the link.
>
> No, Linux has a definition of all the clock modes which applies to all
> devices regardless of what the manufacturer documents in their
> datasheet.
>
Yep. The clock properties are well defined for the different modes that can
be specified in the format property. It's up to the driver to translate this
to driver specific settings. If two drivers behave differently for the same
mode one of them (or both) are broken.
We should probably add the definitions for the different formats to the DT
bindings. E.g. what is default, what is inverted polarity, etc.
- Lars
--
To unsubscribe from this list: send the line "unsubscribe devicetree" in
the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
next prev parent reply other threads:[~2014-03-19 19:31 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <cover.1394883134.git.moinejf@free.fr>
2014-03-15 11:30 ` [PATCH v3 4/4] ASoC: simple-card: Add DT documentation for multi-DAI links Jean-Francois Moine
[not found] ` <d054780a0edf4b2338a52e48bff9144e19aa614f.1394883134.git.moinejf-GANU6spQydw@public.gmane.org>
2014-03-17 10:19 ` [alsa-devel] " Jyri Sarha
2014-03-17 16:43 ` Mark Brown
2014-03-18 8:17 ` Jean-Francois Moine
2014-03-18 10:41 ` Mark Brown
2014-03-19 10:08 ` Jyri Sarha
[not found] ` <53296CB7.1000909-l0cyMroinI0@public.gmane.org>
2014-03-19 13:46 ` Mark Brown
2014-03-19 18:32 ` Jyri Sarha
2014-03-19 19:14 ` Mark Brown
2014-03-19 16:07 ` Jean-Francois Moine
2014-03-19 18:51 ` [alsa-devel] " Lars-Peter Clausen
2014-03-19 19:15 ` Jyri Sarha
[not found] ` <5329ECC2.7040803-l0cyMroinI0@public.gmane.org>
2014-03-19 19:21 ` Mark Brown
[not found] ` <20140319192157.GW11706-GFdadSzt00ze9xe1eoZjHA@public.gmane.org>
2014-03-19 19:31 ` Lars-Peter Clausen [this message]
[not found] ` <5329F0A1.8020801-Qo5EllUWu/uELgA04lAiVw@public.gmane.org>
2014-03-20 11:24 ` Jyri Sarha
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=5329F0A1.8020801@metafoo.de \
--to=lars-qo5elluwu/uelga04laivw@public.gmane.org \
--cc=Li.Xiubo-KZfg59tc24xl57MIdRCFDg@public.gmane.org \
--cc=alsa-devel-K7yf7f+aM1XWsZ/bQMPhNw@public.gmane.org \
--cc=broonie-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org \
--cc=devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
--cc=jsarha-l0cyMroinI0@public.gmane.org \
--cc=kuninori.morimoto.gx-zM6kxYcvzFBBDgjK7y7TUQ@public.gmane.org \
--cc=linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
--cc=moinejf-GANU6spQydw@public.gmane.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).