From: Kevin Hilman <khilman@baylibre.com>
To: Viresh Kumar <viresh.kumar@linaro.org>
Cc: Rafael Wysocki <rjw@rjwysocki.net>,
ulf.hansson@linaro.org, Pavel Machek <pavel@ucw.cz>,
Len Brown <len.brown@intel.com>,
linaro-kernel@lists.linaro.org, linux-pm@vger.kernel.org,
linux-kernel@vger.kernel.org,
Vincent Guittot <vincent.guittot@linaro.org>,
sboyd@codeaurora.org, nm@ti.com, robh+dt@kernel.org,
lina.iyer@linaro.org, rnayak@codeaurora.org
Subject: Re: [PATCH V2 5/6] PM / domain: Save/restore performance state at runtime suspend/resume
Date: Fri, 17 Feb 2017 15:58:18 -0800 [thread overview]
Message-ID: <m21suw4bfp.fsf@baylibre.com> (raw)
In-Reply-To: <21383233a44afe5e5144fadb82867a0a890db46f.1486611268.git.viresh.kumar@linaro.org> (Viresh Kumar's message of "Thu, 9 Feb 2017 09:11:51 +0530")
Viresh Kumar <viresh.kumar@linaro.org> writes:
> With runtime PM, the devices get suspended while the system is up and
> running in order to save power. At such times, it is important to
> re-evaluate the required performance state of the domain, in order to
> choose a lower state if possible.
>
> This patch updates the genpd suspend/resume callbacks to do that.
>
> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Doesn't this assume that a device in the domain would need to change
performance state while runtime suspended. How would that happen?
Rather than adding this here, I would think that drivers would instead
remove any QoS requests before going into runtime suspend, which would
trigger an update before runtime suspending.
Kevin
next prev parent reply other threads:[~2017-02-17 23:58 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-02-09 3:41 [PATCH V2 0/6] PM / Domains: Implement domain performance states Viresh Kumar
2017-02-09 3:41 ` [PATCH V2 1/6] PM / QOS: Add default case to the switch Viresh Kumar
2017-02-09 14:24 ` Pavel Machek
2017-02-10 6:00 ` Viresh Kumar
2017-02-10 12:15 ` Pavel Machek
2017-02-13 3:11 ` Viresh Kumar
2017-02-10 21:24 ` Pavel Machek
2017-02-09 3:41 ` [PATCH V2 2/6] PM / QOS: Pass request type to dev_pm_qos_{add|remove}_notifier() Viresh Kumar
2017-02-09 3:41 ` [PATCH V2 3/6] PM / QOS: Add 'performance' request Viresh Kumar
2017-02-21 15:37 ` Ulf Hansson
2017-02-09 3:41 ` [PATCH V2 4/6] PM / domain: Register for PM QOS performance notifier Viresh Kumar
2017-02-17 23:54 ` Kevin Hilman
2017-02-20 5:01 ` Viresh Kumar
2017-02-21 15:28 ` Ulf Hansson
2017-02-22 3:25 ` Viresh Kumar
2017-02-09 3:41 ` [PATCH V2 5/6] PM / domain: Save/restore performance state at runtime suspend/resume Viresh Kumar
2017-02-17 23:58 ` Kevin Hilman [this message]
2017-02-20 9:18 ` Viresh Kumar
2017-02-09 3:41 ` [PATCH V2 6/6] PM / OPP: Add support to parse domain-performance-state Viresh Kumar
2017-02-17 5:38 ` [PATCH V2 0/6] PM / Domains: Implement domain performance states Viresh Kumar
2017-02-17 7:46 ` Ulf Hansson
2017-02-17 23:22 ` Kevin Hilman
2017-02-20 9:35 ` Viresh Kumar
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