From: Viresh Kumar <viresh.kumar@linaro.org>
To: Lukasz Luba <lukasz.luba@arm.com>, vincent.guittot@linaro.org
Cc: linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org,
devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
vireshk@kernel.org, robh+dt@kernel.org, sboyd@kernel.org,
nm@ti.com, rafael@kernel.org, sudeep.holla@arm.com,
daniel.lezcano@linaro.org, Dietmar.Eggemann@arm.com
Subject: Re: [PATCH 0/4] Add sustainable OPP concept
Date: Thu, 29 Oct 2020 13:10:57 +0530 [thread overview]
Message-ID: <20201029074057.6ugmwyzna52x3oli@vireshk-i7> (raw)
In-Reply-To: <20201028140847.1018-1-lukasz.luba@arm.com>
On 28-10-20, 14:08, Lukasz Luba wrote:
> Hi all,
>
> This patch set introduces a concept of sustainable OPP, which then can be used
> by kernel frameworks or governors for estimating system sustainable system
> state. This kind of estimation is done e.g. in thermal governor Intelligent
> Power Allocation (IPA), which calculates sustainable power of the whole system
> and then derives some coefficients for internal algorithm.
>
> The patch set introduces a new DT bindings 'opp-sustainable', with parsing
> code. It also adds a function (in patch 3/4) which allows device drivers to set
> directly the sustainable OPP. This is helpful when the device drivers populate
> the OPP table by themself (example in patch 4/4).
>
Can we please have some more information about this ? What does the
sustainable OPP mean ? How will platform guys know or learn about this
? How we are going to use it finally ? What does it have to do with
temperature of the SoC or the thermal affects, etc.
--
viresh
next prev parent reply other threads:[~2020-10-29 7:41 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-28 14:08 [PATCH 0/4] Add sustainable OPP concept Lukasz Luba
2020-10-28 14:08 ` [PATCH 1/4] dt-bindings: opp: Introduce opp-sustainable bindings Lukasz Luba
2020-10-28 21:47 ` Nishanth Menon
2020-10-29 10:04 ` Lukasz Luba
2020-10-29 12:59 ` Nishanth Menon
2020-10-29 13:33 ` Lukasz Luba
2020-10-29 13:49 ` Nishanth Menon
2020-10-29 14:20 ` Lukasz Luba
2020-10-30 19:34 ` Rob Herring
2020-11-02 8:40 ` Lukasz Luba
2020-10-28 14:08 ` [PATCH 2/4] OPP: Add support for parsing the 'opp-sustainable' property Lukasz Luba
2020-10-30 11:47 ` Quentin Perret
2020-10-30 12:53 ` Lukasz Luba
2020-10-28 14:08 ` [PATCH 3/4] OPP: Add dev_pm_opp_set_sustainable_opp_freq() Lukasz Luba
2020-10-28 14:08 ` [PATCH 4/4] firmware: arm_scmi/perf: Mark sustainable OPP Lukasz Luba
2020-10-29 7:40 ` Viresh Kumar [this message]
2020-10-29 7:53 ` [PATCH 0/4] Add sustainable OPP concept Viresh Kumar
2020-10-29 9:56 ` Lukasz Luba
2020-10-30 8:29 ` Viresh Kumar
2020-10-30 9:19 ` Lukasz Luba
2020-10-30 9:52 ` Viresh Kumar
2020-10-30 10:56 ` Lukasz Luba
2020-10-30 11:17 ` Viresh Kumar
2020-10-30 12:40 ` Lukasz Luba
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