linux-kernel - Re: [PATCH v3 0/3] cpufreq: qcom-nvmem: Fix power domain scaling

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Date:   Thu, 23 Nov 2023 13:09:01 +0530
From:   Viresh Kumar <viresh.kumar@...aro.org>
To:     Stephan Gerhold <stephan.gerhold@...nkonzept.com>
Cc:     Ulf Hansson <ulf.hansson@...aro.org>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Ilia Lin <ilia.lin@...nel.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>, linux-pm@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, Stephan Gerhold <stephan@...hold.net>,
        stable@...r.kernel.org
Subject: Re: [PATCH v3 0/3] cpufreq: qcom-nvmem: Fix power domain scaling

On 14-11-23, 11:07, Stephan Gerhold wrote:
> The power domain scaling setup for QCS404 and MSM8909 in
> cpufreq-com-nvmem does not work correctly at the moment because the
> genpd core ignores all the performance state votes that are specified in
> the CPU OPP table. This happens because nothing in the driver makes the
> genpd core aware that the power domains are actively being consumed by
> the CPU.
> 
> Fix this by marking the devices as runtime active. Also mark the devices
> to be in the "awake path" during system suspend so that performance
> state votes necessary for the CPU are preserved during system suspend.
> 
> While all the patches in this series are needed for full functionality,
> the cpufreq and pmdomain patches can be merged independently. There is
> no compile-time dependency between those two.
> 
> Signed-off-by: Stephan Gerhold <stephan.gerhold@...nkonzept.com>
> ---
> Changes in v3:
> - Drop patches with MSM8909 definitions that were applied already
> - Add extra patch to fix system suspend properly by using
>   device_set_awake_path() instead of dev_pm_syscore_device()
> - Set GENPD_FLAG_ACTIVE_WAKEUP for rpmpd so that performance state votes
>   needed by the CPU are preserved during suspend
> - Link to v2: https://lore.kernel.org/r/20231018-msm8909-cpufreq-v2-0-0962df95f654@kernkonzept.com

Applied. Thanks.

I picked the pmdomain patch too, lemme know if that needs to go via
some other tree.

-- 
viresh