linux-kernel - Re: [PATCH v5] ASoC: wm8978: add missing BCLK divider setup

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <CAN7C2SAzHkn=nb-FS8JbKgvvF9iDUssEszgnfpY7s4RsPwU92w@mail.gmail.com>
Date: Thu, 9 Oct 2025 04:27:14 +0800
From: Sune Brian <briansune@...il.com>
To: Charles Keepax <ckeepax@...nsource.cirrus.com>
Cc: Liam Girdwood <lgirdwood@...il.com>, Mark Brown <broonie@...nel.org>, 
	Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>, linux-sound@...r.kernel.org, 
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v5] ASoC: wm8978: add missing BCLK divider setup

Charles Keepax <ckeepax@...nsource.cirrus.com> 於 2025年10月9日 週四 上午4:18寫道：

> That said though, this part does somewhat pre-date me so I could
> be wrong. If you have hardware and an oscilloscope this should
> be pretty simple to verify in practice?

Have gear but not worth to waste time on this test.
Well remind this part is EOL far way ago.

> There are generally two reasons to run a faster than needed BCLK:
>
> 1) Because you can't generate the actual BCLK.

Then let it be as delta-BCLK that is minimum error is better same as
PPM concept.
There must be +ve and -ve errors on margin.

> 2) Because you are TDMing multiple devices onto the bus. ie.
>    something else is using those extra bits.

Is this device supported?
I am not too familiar on TDM things are series things on same IIS
sound too system deepened,
But of cause this make rooms for future improvement or support.

> That is absolutely your choice. The patch should I think work
> now, but could still use a little tidy up to remove the unneeded
> code and big warning for something that isn't an issue.

Tired and lazy to check out all these things again and again.
Every patch i run on actual HW before sent.

Brian