linux-kernel - Re: [PATCH 1/2] TSD: arm64: dts: rockchip: use codec as clock master

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 for Android: free password hash cracker in your pocket

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

Message-ID: <2eda319d-bdd9-bfeb-005a-5989cf674501@linaro.org>
Date:   Fri, 25 Aug 2023 08:49:21 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Jakob Unterwurzacher <jakobunt@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Heiko Stuebner <heiko@...ech.de>
Cc:     jakob.unterwurzacher@...obroma-systems.com,
        Ermin Sunj <ermin.sunj@...obroma-systems.com>,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] TSD: arm64: dts: rockchip: use codec as clock master

On 23/08/2023 14:19, Jakob Unterwurzacher wrote:
> From: Ermin Sunj <ermin.sunj@...obroma-systems.com>
> 
> If the codec is not the clock master, the MCLK needs to be
> synchronous to both I2S_SCL ans I2S_LRCLK. We do not have that
> on Haikou, causing distorted audio.
> 
> Before:
> 
>  Running audioloopback.py script on Ringneck, 1kHz
>  output sine wave is not stable and shows distortion.
> 
> After:
> 
>  10h stress tests audioloopback.py failed only one time.
>  That is 0.00014% failure rate.

What is TSD? Why it is in the subject prefix?

Please use subject prefixes matching the subsystem. You can get them for
example with `git log --oneline -- DIRECTORY_OR_FILE` on the directory
your patch is touching.

Best regards,
Krzysztof