Alsa-Devel Archive on lore.kernel.org
 help / color / Atom feed
From: Ben Dooks <ben.dooks@codethink.co.uk>
To: Mark Brown <broonie@kernel.org>
Cc: linux-kernel@lists.codethink.co.uk, alsa-devel@alsa-project.org,
	linux-kernel@vger.kernel.org, lgirdwood@gmail.com,
	thierry.reding@gmail.com, linux-tegra@vger.kernel.org,
	Jon Hunter <jonathanh@nvidia.com>
Subject: Re: [Linux-kernel] [PATCH 2/4] ASoC: tegra: Add a TDM configuration callback
Date: Mon, 30 Jul 2018 18:39:52 +0100
Message-ID: <a1289d568db3a5008ab11006b4c04952@codethink.co.uk> (raw)
In-Reply-To: <20180730150749.GK5789@sirena.org.uk>



On 2018-07-30 16:07, Mark Brown wrote:
> On Mon, Jul 30, 2018 at 03:04:46PM +0100, Jon Hunter wrote:
>> On 30/07/18 11:18, Mark Brown wrote:
> 
>> > DSP modes only care about the rising edge of the LRCLK, the pulse can be
>> > any width without causing interoperability problems.
> 
>> OK, thanks I was not able to find a spec that defines this, but I saw 
>> a
>> lot of codecs use a single bit clock width. So then equally making the
>> default '1' should also be fine.
> 
> There's not really a spec for this, it's just what tends to be
> implemented.
> 
>> I still do not like configuring the fsync width in this function. The
>> fsync width needs to be configured for both DSP modes and normal I2S
>> modes and so it seems it would be more appropriate to do this in the
>> hw_params function for this driver.
> 
> You *could* just always use the I2S width, it's going to look odd when
> people use a scope but it will work most of the time.

We did this as we were dealing with a legacy system in which we didn't
know if this was important setting or not, so we tried to make the
settings as close as possible to the original nvidia supplied source.

-- 
Ben

  reply index

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-07-27 12:59 [PATCH 0/4] ASoC: Tegra30 TDM support Jorge Sanjuan
2018-07-27 12:59 ` [PATCH 1/4] ASoC: tegra: i2s: Fix typo/broken macro Jorge Sanjuan
2018-07-30  8:58   ` Jon Hunter
2018-07-30 11:04   ` Applied "ASoC: tegra: i2s: Fix typo/broken macro" to the asoc tree Mark Brown
2018-07-27 12:59 ` [PATCH 2/4] ASoC: tegra: Add a TDM configuration callback Jorge Sanjuan
2018-07-30  8:49   ` Mark Brown
2018-07-30  9:04     ` Ben Dooks
2018-07-30  9:31   ` Jon Hunter
2018-07-30 10:18     ` Mark Brown
2018-07-30 14:04       ` Jon Hunter
2018-07-30 14:15         ` Jon Hunter
2018-07-30 15:07         ` Mark Brown
2018-07-30 17:39           ` Ben Dooks [this message]
2018-07-27 12:59 ` [PATCH 3/4] ASoC: tegra: Allow 32-bit and 24-bit samples Jorge Sanjuan
2018-07-28 22:28   ` kbuild test robot
2018-07-29  9:21     ` Ben Dooks
2018-07-27 12:59 ` [PATCH 4/4] ASoC: tegra: i2s: Add support for more than 2 channels Jorge Sanjuan
2018-07-30  9:46   ` Jon Hunter
2018-07-30 10:21     ` Mark Brown
2018-07-30 17:22 ` [PATCH 0/4] ASoC: Tegra30 TDM support Ben Dooks

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=a1289d568db3a5008ab11006b4c04952@codethink.co.uk \
    --to=ben.dooks@codethink.co.uk \
    --cc=alsa-devel@alsa-project.org \
    --cc=broonie@kernel.org \
    --cc=jonathanh@nvidia.com \
    --cc=lgirdwood@gmail.com \
    --cc=linux-kernel@lists.codethink.co.uk \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-tegra@vger.kernel.org \
    --cc=thierry.reding@gmail.com \
    /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

Alsa-Devel Archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/alsa-devel/0 alsa-devel/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 alsa-devel alsa-devel/ https://lore.kernel.org/alsa-devel \
		alsa-devel@alsa-project.org
	public-inbox-index alsa-devel

Example config snippet for mirrors

Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.alsa-project.alsa-devel


AGPL code for this site: git clone https://public-inbox.org/public-inbox.git