From: Mark Brown <broonie@kernel.org>
To: Marian Postevca <posteuca@mutex.one>
Cc: Takashi Iwai <tiwai@suse.com>,
Liam Girdwood <lgirdwood@gmail.com>,
Jaroslav Kysela <perex@perex.cz>,
alsa-devel@alsa-project.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2 2/4] ASoC: es8316: Enable support for MCLK div by 2
Date: Mon, 28 Aug 2023 19:09:56 +0100 [thread overview]
Message-ID: <ZOzi9BuTo2oXcKta@finisterre.sirena.org.uk> (raw)
In-Reply-To: <87msyc9mtm.fsf@mutex.one>
[-- Attachment #1: Type: text/plain, Size: 1278 bytes --]
On Mon, Aug 28, 2023 at 12:50:45AM +0300, Marian Postevca wrote:
> Mark Brown <broonie@kernel.org> writes:
> > machine with this MCLK rather than that's based on the spec. I would
> > instead suggest applying the MCLK divider in any case where we can do so
> > and still generate suitable clocking for the rest of the system, or at
> > least hit 256fs (the datasheet quotes 256/384fs on the front page which
> > suggests it's targetting 256fs, that'd be a fairly normal number, and
> > there's mention of 12/24MHz USB clocks being directly usable). Doing
> > this should either make no odds or result in better performance.
> Not 100% sure what checks should be done for a MCLK to determine if it
> generates suitable clocking. Would something along this patch make
> sense?
In general a MCLK that allows you to configure the dividers in the CODEC
appropriately for use. So long as it works your change looks fine I
think modulo.
> + do {
> + /* Validate supported sample rates that are autodetected from MCLK */
> + for (i = 0; i < NR_SUPPORTED_MCLK_LRCK_RATIOS; i++) {
> + const unsigned int ratio = supported_mclk_lrck_ratios[i];
> +
> + if (clk % ratio != 0)
> + continue;
> + if (clk / ratio == params_rate(params))
> + break;
> + }
Use ARRAY_SIZE()
[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 488 bytes --]
next prev parent reply other threads:[~2023-08-28 18:10 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-08-24 21:01 [PATCH v2 0/4] ASoC: amd: acp: Add sound support for a line of HUAWEI laptops Marian Postevca
2023-08-24 21:01 ` [PATCH v2 1/4] ASoC: es8316: Enable support for S32 LE format Marian Postevca
2023-08-24 21:33 ` Mark Brown
2023-08-25 21:55 ` Marian Postevca
2023-08-26 11:24 ` Mark Brown
2023-08-24 21:01 ` [PATCH v2 2/4] ASoC: es8316: Enable support for MCLK div by 2 Marian Postevca
2023-08-24 21:53 ` Mark Brown
2023-08-27 21:50 ` Marian Postevca
2023-08-28 18:09 ` Mark Brown [this message]
2023-08-28 20:22 ` Marian Postevca
2023-08-29 10:18 ` Mark Brown
2023-08-24 21:01 ` [PATCH v2 3/4] ASoC: amd: acp: Add support for splitting the codec specific code from the ACP driver Marian Postevca
2023-08-24 21:01 ` [PATCH v2 4/4] ASoC: amd: acp: Add machine driver that enables sound for systems with a ES8336 codec Marian Postevca
2023-08-24 22:03 ` Mark Brown
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=ZOzi9BuTo2oXcKta@finisterre.sirena.org.uk \
--to=broonie@kernel.org \
--cc=alsa-devel@alsa-project.org \
--cc=lgirdwood@gmail.com \
--cc=linux-kernel@vger.kernel.org \
--cc=perex@perex.cz \
--cc=posteuca@mutex.one \
--cc=tiwai@suse.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
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).