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From: Mark Brown <broonie@kernel.org>
To: Ulf Hansson <ulf.hansson@linaro.org>
Cc: "Rafael J . Wysocki" <rjw@rjwysocki.net>,
	Viresh Kumar <viresh.kumar@linaro.org>,
	Dmitry Baryshkov <dmitry.baryshkov@linaro.org>,
	Linux PM <linux-pm@vger.kernel.org>,
	Dmitry Osipenko <digetx@gmail.com>,
	Jonathan Hunter <jonathanh@nvidia.com>,
	Thierry Reding <thierry.reding@gmail.com>,
	Roja Rani Yarubandi <rojay@codeaurora.org>,
	Bjorn Andersson <bjorn.andersson@linaro.org>,
	Vincent Guittot <vincent.guittot@linaro.org>,
	Stephen Boyd <sboyd@kernel.org>,
	Stephan Gerhold <stephan@gerhold.net>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	Rajendra Nayak <rnayak@codeaurora.org>
Subject: Re: [PATCH v2 4/4] PM: domains: Drop/restore performance state votes for devices at system PM
Date: Thu, 3 Jun 2021 12:15:29 +0100	[thread overview]
Message-ID: <20210603111529.GB4257@sirena.org.uk> (raw)
In-Reply-To: <CAPDyKFp2dKFQpLMgazXumCxf=FHQ9bdadXUkGsjiAwniF8p2dw@mail.gmail.com>

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On Thu, Jun 03, 2021 at 12:20:57PM +0200, Ulf Hansson wrote:
> On Thu, 3 Jun 2021 at 11:34, Ulf Hansson <ulf.hansson@linaro.org> wrote:

> > Recent changes in genpd drops and restore performance state votes for
> > devices during runtime PM.

> After a second thought, it looks like we maybe should defer to apply
> this final patch of the series. At least until we figured out how to
> address the below issue:

> So, I noticed that we have things like "regulator-fixed-domain", that
> uses "required-opps" to enable/disable a regulator through the
> dev_pm_set_performance_state() interface. We likely don't want to drop
> the performance state internally in genpd when genpd_suspend_noirq()
> gets called, for the corresponding struct device for the regulator.

> I guess if genpd should drop performance states like $subject patch
> suggest, we need some kind of additional coordination, that allows a
> subsystem/driver to inform genpd when it should avoid it. Or something
> along those lines.

I'm not sure what you're looking for from me here - was there a concrete
question or somehing?

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  reply	other threads:[~2021-06-03 11:15 UTC|newest]

Thread overview: 31+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-03  9:34 [PATCH v2 0/4] PM: domains: Avoid boilerplate code for DVFS in subsystem/drivers Ulf Hansson
2021-06-03  9:34 ` [PATCH v2 1/4] PM: domains: Split code in dev_pm_genpd_set_performance_state() Ulf Hansson
2021-06-03  9:34 ` [PATCH v2 2/4] PM: domains: Return early if perf state is already set for the device Ulf Hansson
2021-06-03  9:34 ` [PATCH v2 3/4] PM: domains: Drop/restore performance state votes for devices at runtime PM Ulf Hansson
2021-06-03  9:55   ` Viresh Kumar
2021-06-03 10:31     ` Ulf Hansson
2021-06-03 11:17       ` Ulf Hansson
2021-06-04  3:53         ` Viresh Kumar
2021-06-04  7:45           ` Ulf Hansson
2021-06-07  4:47             ` Viresh Kumar
2021-06-09 12:25               ` Ulf Hansson
2021-06-03 19:02   ` Dmitry Osipenko
2021-06-03 19:08     ` Dmitry Osipenko
2021-06-04  7:20       ` Ulf Hansson
2021-06-03  9:34 ` [PATCH v2 4/4] PM: domains: Drop/restore performance state votes for devices at system PM Ulf Hansson
2021-06-03 10:20   ` Ulf Hansson
2021-06-03 11:15     ` Mark Brown [this message]
2021-06-03 13:48       ` Ulf Hansson
2021-06-08 12:53     ` Stephan Gerhold
2021-06-08 14:08       ` Ulf Hansson
2021-06-08 14:20         ` Mark Brown
2021-06-08 14:39           ` Ulf Hansson
2021-06-08 15:37         ` Stephan Gerhold
2021-06-03 11:12 ` [PATCH v2 0/4] PM: domains: Avoid boilerplate code for DVFS in subsystem/drivers Stephan Gerhold
2021-06-03 15:27   ` Ulf Hansson
2021-06-03 17:14     ` Stephan Gerhold
2021-06-04  7:18       ` Ulf Hansson
2021-06-04  8:23         ` Stephan Gerhold
2021-06-04 10:57           ` Ulf Hansson
2021-06-04 11:50             ` Stephan Gerhold
2021-06-11 16:42               ` Rafael J. Wysocki

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