From: Jyri Sarha <jsarha@ti.com>
To: Lars-Peter Clausen <lars@metafoo.de>
Cc: Jean-Francois Moine <moinejf@free.fr>,
Mark Brown <broonie@kernel.org>, <devicetree@vger.kernel.org>,
<alsa-devel@alsa-project.org>, Xiubo Li <Li.Xiubo@freescale.com>,
<linux-kernel@vger.kernel.org>,
Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Subject: Re: [alsa-devel] [PATCH v3 4/4] ASoC: simple-card: Add DT documentation for multi-DAI links
Date: Wed, 19 Mar 2014 21:15:14 +0200 [thread overview]
Message-ID: <5329ECC2.7040803@ti.com> (raw)
In-Reply-To: <5329E749.6070900@metafoo.de>
On 03/19/2014 08:51 PM, Lars-Peter Clausen wrote:
> On 03/19/2014 11:08 AM, Jyri Sarha wrote:
> [...]
>> It may sometimes be helpful to allow overwriting link level settings
>> in dai
>> level. In order to do that it should be possible to write all daifmt
>> settings explicitly like this:
>>
>> bitclock-inversion = <0>; /* <0> = no bitclock-inversion */
>
> 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.
I think there was an example of this in some mail regarding the
simple-card DT-bidings, but I can't find it ATM.
Best regards,
Jyri
WARNING: multiple messages have this Message-ID (diff)
From: Jyri Sarha <jsarha@ti.com>
To: Lars-Peter Clausen <lars@metafoo.de>
Cc: Jean-Francois Moine <moinejf@free.fr>,
Mark Brown <broonie@kernel.org>,
devicetree@vger.kernel.org, alsa-devel@alsa-project.org,
Xiubo Li <Li.Xiubo@freescale.com>,
linux-kernel@vger.kernel.org,
Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Subject: Re: [alsa-devel] [PATCH v3 4/4] ASoC: simple-card: Add DT documentation for multi-DAI links
Date: Wed, 19 Mar 2014 21:15:14 +0200 [thread overview]
Message-ID: <5329ECC2.7040803@ti.com> (raw)
In-Reply-To: <5329E749.6070900@metafoo.de>
On 03/19/2014 08:51 PM, Lars-Peter Clausen wrote:
> On 03/19/2014 11:08 AM, Jyri Sarha wrote:
> [...]
>> It may sometimes be helpful to allow overwriting link level settings
>> in dai
>> level. In order to do that it should be possible to write all daifmt
>> settings explicitly like this:
>>
>> bitclock-inversion = <0>; /* <0> = no bitclock-inversion */
>
> 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.
I think there was an example of this in some mail regarding the
simple-card DT-bidings, but I can't find it ATM.
Best regards,
Jyri
next prev parent reply other threads:[~2014-03-19 19:15 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-03-15 11:32 [PATCH v3 0/4] ASoC: simple-card: multi DAI links extension Jean-Francois Moine
2014-03-15 11:32 ` Jean-Francois Moine
2014-03-15 10:32 ` [PATCH v3 1/4] ASoC: simple-card: Simplify code Jean-Francois Moine
2014-03-15 10:32 ` Jean-Francois Moine
2014-03-17 16:24 ` Mark Brown
2014-03-15 11:09 ` [PATCH v3 2/4] ASoC: simple-card: dynamically allocate the DAI link and properties Jean-Francois Moine
2014-03-17 9:29 ` [alsa-devel] " Jyri Sarha
2014-03-17 9:29 ` Jyri Sarha
2014-03-17 10:23 ` Jean-Francois Moine
2014-03-17 10:23 ` Jean-Francois Moine
2014-03-17 10:27 ` [alsa-devel] " Jyri Sarha
2014-03-17 10:27 ` Jyri Sarha
2014-03-17 16:24 ` Mark Brown
2014-03-18 20:18 ` Mark Brown
2014-03-15 11:26 ` [PATCH v3 3/4] ASoC: simple-card: Handle many DAI links Jean-Francois Moine
2014-03-17 16:29 ` Mark Brown
2014-03-15 11:30 ` [PATCH v3 4/4] ASoC: simple-card: Add DT documentation for multi-DAI links Jean-Francois Moine
2014-03-17 10:19 ` [alsa-devel] " Jyri Sarha
2014-03-17 10:19 ` Jyri Sarha
2014-03-17 16:43 ` Mark Brown
2014-03-17 16:43 ` Mark Brown
2014-03-18 8:17 ` Jean-Francois Moine
2014-03-18 10:41 ` Mark Brown
2014-03-18 10:41 ` Mark Brown
2014-03-19 10:08 ` Jyri Sarha
2014-03-19 10:08 ` Jyri Sarha
2014-03-19 13:46 ` Mark Brown
2014-03-19 13:46 ` Mark Brown
2014-03-19 18:32 ` Jyri Sarha
2014-03-19 18:32 ` Jyri Sarha
2014-03-19 19:14 ` Mark Brown
2014-03-19 19:14 ` Mark Brown
2014-03-19 16:07 ` Jean-Francois Moine
2014-03-19 16:07 ` Jean-Francois Moine
2014-03-19 18:51 ` [alsa-devel] " Lars-Peter Clausen
2014-03-19 18:51 ` Lars-Peter Clausen
2014-03-19 19:15 ` Jyri Sarha [this message]
2014-03-19 19:15 ` Jyri Sarha
2014-03-19 19:21 ` Mark Brown
2014-03-19 19:21 ` Mark Brown
2014-03-19 19:31 ` Lars-Peter Clausen
2014-03-19 19:31 ` Lars-Peter Clausen
2014-03-20 11:24 ` Jyri Sarha
2014-03-20 11:24 ` Jyri Sarha
2014-03-17 3:49 ` [PATCH v3 0/4] ASoC: simple-card: multi DAI links extension Li.Xiubo
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=5329ECC2.7040803@ti.com \
--to=jsarha@ti.com \
--cc=Li.Xiubo@freescale.com \
--cc=alsa-devel@alsa-project.org \
--cc=broonie@kernel.org \
--cc=devicetree@vger.kernel.org \
--cc=kuninori.morimoto.gx@renesas.com \
--cc=lars@metafoo.de \
--cc=linux-kernel@vger.kernel.org \
--cc=moinejf@free.fr \
/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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.