linux-kernel - Re: [PATCH V2 12/15] cpufreq: mediatek: Use maximum voltage in init stage

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: <fc1e157470d7ad68efd823f38fe4a360ba3dfbde.camel@mediatek.com>
Date:   Thu, 14 Apr 2022 11:40:37 +0800
From:   Rex-BC Chen <rex-bc.chen@...iatek.com>
To:     AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>, <rafael@...nel.org>,
        <viresh.kumar@...aro.org>, <robh+dt@...nel.org>,
        <krzk+dt@...nel.org>
CC:     <matthias.bgg@...il.com>, <jia-wei.chang@...iatek.com>,
        <roger.lu@...iatek.com>, <hsinyi@...gle.com>,
        <linux-pm@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>,
        <Project_Global_Chrome_Upstream_Group@...iatek.com>
Subject: Re: [PATCH V2 12/15] cpufreq: mediatek: Use maximum voltage in init
 stage

On Fri, 2022-04-08 at 15:37 +0200, AngeloGioacchino Del Regno wrote:
> Il 08/04/22 06:59, Rex-BC Chen ha scritto:
> > From: Jia-Wei Chang <jia-wei.chang@...iatek.com>
> > 
> > Two or more clients may use the same regulator, and it could cause
> > the
> > issue of high-freqeuncy-low-voltage.
> > To prevent this, we use maximum voltage in
> > mtk_cpu_dvfs_info_init().
> > 
> > Signed-off-by: Jia-Wei Chang <jia-wei.chang@...iatek.com>
> 
> Is this happening for proc-supply (proc_reg)?
> ...because it looks like it is, so you should send this commit
> separately
> and with an appropriate Fixes: tag.

Hello all,

If we use the value of max(booting voltage, target cpufreq voltage)
when cci is not ready, I think we don't need this patch to prevent high
frequenc low voltage issue.
(mentioned in [1])

I will drop this patch in next version.

Thanks.

[1]:https://patchwork.kernel.org/comment/24816091/

BRs,
Rex