linux-kernel - Re: [PATCH V4 07/14] cpufreq: mediatek: Add .get function

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Date:   Wed, 4 May 2022 19:57:09 +0800
From:   Rex-BC Chen <rex-bc.chen@...iatek.com>
To:     Viresh Kumar <viresh.kumar@...aro.org>
CC:     <rafael@...nel.org>, <robh+dt@...nel.org>, <krzk+dt@...nel.org>,
        <matthias.bgg@...il.com>, <jia-wei.chang@...iatek.com>,
        <roger.lu@...iatek.com>, <hsinyi@...gle.com>,
        <khilman@...libre.com>, <angelogioacchino.delregno@...labora.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 V4 07/14] cpufreq: mediatek: Add .get function

On Wed, 2022-05-04 at 13:52 +0530, Viresh Kumar wrote:
> On 03-05-22, 19:33, Rex-BC Chen wrote:
> > Our observation tells us cpufreq_online is setting only once at
> > boot
> > for one cpu cluster.
> > But we can see the problem repeatly occurs once cpufreq_get is
> > invoked.
> > 
> > e.g.
> > [ 71.154560] cpufreq: Warning: CPU frequency out of sync: cpufreq
> > and
> > timing core thinks of 500000, is 499999 kHz
> > [ 71.155880] cpufreq: notification 0 of frequency transition to
> > 499999
> > kHz
> > [ 71.156777] cpufreq: notification 1 of frequency transition to
> > 499999
> > kHz
> > [ 71.187241] cpufreq: target for CPU 0: 500000 kHz, relation 0,
> > requested 500000 kHz
> > [ 71.188246] cpufreq: target_freq/policy->cur: 500000/499999 kHz
> 
> Lemme know if this helps:
> 
> 
https://lore.kernel.org/lkml/39e39a7d30c8ee6af81fb64670a330abeb87402e.1651652493.git.viresh.kumar@linaro.org/
> 

Hello Viresh,

Thanks a lot! It helps to fix this issue.
And I will drop this patch in the next version.

BRs,
Rex