linux-kernel - Re: [PATCH v2 0/4] Energy Model power in micro-Watts and SCMI v3.1 alignment

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Date:   Fri, 15 Jul 2022 19:18:56 +0200
From:   "Rafael J. Wysocki" <rafael@...nel.org>
To:     Lukasz Luba <lukasz.luba@....com>
Cc:     "Rafael J. Wysocki" <rafael@...nel.org>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Amit Kucheria <amitk@...nel.org>,
        Linux PM <linux-pm@...r.kernel.org>,
        "Zhang, Rui" <rui.zhang@...el.com>,
        Viresh Kumar <viresh.kumar@...aro.org>,
        Dietmar Eggemann <dietmar.eggemann@....com>,
        Nishanth Menon <nm@...com>, Stephen Boyd <sboyd@...nel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Sudeep Holla <sudeep.holla@....com>,
        Cristian Marussi <cristian.marussi@....com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        "moderated list:ARM/Mediatek SoC..." 
        <linux-mediatek@...ts.infradead.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v2 0/4] Energy Model power in micro-Watts and SCMI v3.1 alignment

On Fri, Jul 15, 2022 at 10:56 AM Lukasz Luba <lukasz.luba@....com> wrote:
>
> Hi Rafael,
>
> gentle ping.
>
> On 7/7/22 11:46, Lukasz Luba wrote:
> > Hi Rafael,
> >
> > On 7/7/22 08:15, Lukasz Luba wrote:
> >> Hi all,
> >>
> >> This is a patch set which changes Energy Model power values scale to
> >> micro-Watts. It also upgrades the SCMI performance layer + scmi-cpufreq
> >> driver to leverage the SCMI v3.1 spec and process micro-Watts power
> >> values
> >> coming from FW. The higher precision in EM power field solves an issue
> >> of a rounding error, which then can be misinterpreted as 'inefficient
> >> OPP'.
> >> An example rounding issue calculation is present in patch 1/4
> >> description.
> >>
> >> Changes:
> >> v2
> >> - simplified 32bit checks for max number of CPUs preventing energy
> >>    estimation overflow
> >> - added Reviewed-by and ACKs
> >> v1 [1]
> >>
> >> Regards,
> >> Lukasz Luba
> >>
> >> [1]
> >> https://lore.kernel.org/lkml/20220622145802.13032-1-lukasz.luba@arm.com/
> >>
> >> Lukasz Luba (4):
> >>    PM: EM: convert power field to micro-Watts precision and align drivers
> >>    Documentation: EM: Switch to micro-Watts scale
> >>    firmware: arm_scmi: Get detailed power scale from perf
> >>    cpufreq: scmi: Support the power scale in micro-Watts in SCMI v3.1
> >>
> >>   Documentation/power/energy-model.rst  | 14 +++----
> >>   drivers/cpufreq/mediatek-cpufreq-hw.c |  7 ++--
> >>   drivers/cpufreq/scmi-cpufreq.c        | 15 +++++++-
> >>   drivers/firmware/arm_scmi/perf.c      | 18 +++++----
> >>   drivers/opp/of.c                      | 15 ++++----
> >>   drivers/powercap/dtpm_cpu.c           |  5 +--
> >>   drivers/thermal/cpufreq_cooling.c     | 13 ++++++-
> >>   drivers/thermal/devfreq_cooling.c     | 19 ++++++++--
> >>   include/linux/energy_model.h          | 54 +++++++++++++++++++--------
> >>   include/linux/scmi_protocol.h         |  8 +++-
> >>   kernel/power/energy_model.c           | 24 ++++++++----
> >>   11 files changed, 132 insertions(+), 60 deletions(-)
> >>
> >
> > I got ACKs (and on Reviewed-by) for this patch set.
> > Could you take this via your PM tree, please?
>
> This patch set is on our roadmap and would be good if it could
> go as v5.20 material.
>
> There are Acks for these patch set. If you need some
> help with this (like rebasing, etc), just ping me.
>
> Could you take them, please?

All patches in the series applied as 5.20 material, thanks!