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Date: Fri, 17 Feb 2017 15:58:18 -0800 From: Kevin Hilman <khilman@...libre.com> To: Viresh Kumar <viresh.kumar@...aro.org> Cc: Rafael Wysocki <rjw@...ysocki.net>, ulf.hansson@...aro.org, Pavel Machek <pavel@....cz>, Len Brown <len.brown@...el.com>, linaro-kernel@...ts.linaro.org, linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org, Vincent Guittot <vincent.guittot@...aro.org>, sboyd@...eaurora.org, nm@...com, robh+dt@...nel.org, lina.iyer@...aro.org, rnayak@...eaurora.org Subject: Re: [PATCH V2 5/6] PM / domain: Save/restore performance state at runtime suspend/resume Viresh Kumar <viresh.kumar@...aro.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@...aro.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
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