From: Viresh Kumar <viresh.kumar@linaro.org>
To: Ulf Hansson <ulf.hansson@linaro.org>
Cc: Sudeep Holla <sudeep.holla@arm.com>,
Rob Herring <robh@kernel.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
DTML <devicetree@vger.kernel.org>,
Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>,
Hector Yuan <hector.yuan@mediatek.com>,
Bjorn Andersson <bjorn.andersson@linaro.org>,
Rob Herring <robh+dt@kernel.org>
Subject: Re: [PATCH v4] dt-bindings: dvfs: Add support for generic performance domains
Date: Wed, 20 Oct 2021 11:54:20 +0530 [thread overview]
Message-ID: <20211020062420.fcckkt2f55b54ipq@vireshk-i7> (raw)
In-Reply-To: <CAPDyKFqk_-YQjEECLm_gM6UpMahRok4vNnxCv3i614OEvPuD2Q@mail.gmail.com>
On 19-10-21, 15:58, Ulf Hansson wrote:
> To me, this looks doable from a genpd provider too. Of course, we may
> need to extend the genpd interface a bit to make it fit well for this
> new use case, of course. And I am happy to help, if that is needed.
>
> One thing though; how is the aggregation of the OPP votes expected to
> be done? Is that entirely managed by FW - or is it expected that the
> cpufreq driver, in this case, keeps track of the aggregated votes too?
In case of cpufreq drivers, the voting is never required since there
is always a single request from cpufreq core to change the freq for a
group of devices (CPUs). And these genpds will only have a bunch of
CPUs to serve.
> Don't get me wrong, I am not pushing for these DT bindings to be
> deprecated (at least not yet :-)), but I would certainly like to
> understand more about them. In the end, we haven't walked this far, by
> extending genpd and inventing new DT bindings to enable it to support
> "performance management" - then just to just forget about them again.
> :-)
I am happy to move to genpd if this can be done in a sane way there :)
--
viresh
next prev parent reply other threads:[~2021-10-20 6:24 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-17 15:54 [PATCH v4] dt-bindings: dvfs: Add support for generic performance domains Sudeep Holla
2021-05-17 19:17 ` Rob Herring
2021-05-19 11:23 ` Sudeep Holla
2021-05-20 3:54 ` Viresh Kumar
2021-05-17 20:45 ` Rob Herring
2021-05-19 11:20 ` Sudeep Holla
2021-05-20 19:43 ` Rob Herring
2021-05-21 4:08 ` Viresh Kumar
2021-05-21 15:24 ` Sudeep Holla
2021-05-24 9:17 ` Viresh Kumar
2021-05-24 10:05 ` Sudeep Holla
2021-10-14 10:56 ` Ulf Hansson
2021-10-14 14:55 ` Sudeep Holla
2021-10-15 9:17 ` Ulf Hansson
2021-10-19 7:24 ` Viresh Kumar
2021-10-19 13:58 ` Ulf Hansson
2021-10-20 6:24 ` Viresh Kumar [this message]
2021-10-20 10:25 ` Sudeep Holla
2021-10-21 13:34 ` Ulf Hansson
2021-10-21 15:35 ` Sudeep Holla
2021-10-20 12:11 ` Rob Herring
2021-10-21 13:13 ` Ulf Hansson
2021-10-21 13:33 ` Sudeep Holla
2021-10-21 16:01 ` Ulf Hansson
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