From: Viresh Kumar <viresh.kumar@linaro.org>
To: Rajendra Nayak <rnayak@codeaurora.org>
Cc: Rafael Wysocki <rjw@rjwysocki.net>,
niklas.cassel@linaro.org, Viresh Kumar <vireshk@kernel.org>,
Nishanth Menon <nm@ti.com>, Stephen Boyd <sboyd@kernel.org>,
linux-pm@vger.kernel.org,
Vincent Guittot <vincent.guittot@linaro.org>,
Amit Kucheria <amit.kucheria@linaro.org>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 1/2] opp: Attach genpds to devices from within OPP core
Date: Mon, 8 Jul 2019 11:31:38 +0530 [thread overview]
Message-ID: <20190708060138.7mmdbusfnimzg7er@vireshk-i7> (raw)
In-Reply-To: <aee8dc78-e292-a671-3dc5-ca962c0eec6b@codeaurora.org>
On 04-07-19, 11:55, Rajendra Nayak wrote:
>
> On 5/13/2019 3:54 PM, Viresh Kumar wrote:
> > The OPP core requires the virtual device pointers to set performance
> > state on behalf of the device, for the multiple power domain case. The
> > genpd API (dev_pm_domain_attach_by_name()) has evolved now to support
> > even the single power domain case and that lets us add common code for
> > handling both the cases more efficiently.
> >
> > The virtual device structure returned by dev_pm_domain_attach_by_name()
> > isn't normally used by the cpufreq drivers as they don't manage power
> > on/off of the domains and so is only useful for the OPP core.
>
> This might be true for CPUs but not necessarily so for IO devices which might
> want to set up device links so the devices runtime pm calls can trigger the
> on/off of the power domain. Is there a way to handle that case now?
https://lore.kernel.org/lkml/027985ce35873cd218298302a1408da06d48458b.1562565567.git.viresh.kumar@linaro.org
--
viresh
prev parent reply other threads:[~2019-07-08 6:01 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-13 10:24 [PATCH 1/2] opp: Attach genpds to devices from within OPP core Viresh Kumar
2019-05-13 10:24 ` [PATCH 2/2] opp: Allocate genpd_virt_devs from dev_pm_opp_attach_genpd() Viresh Kumar
2019-05-13 11:05 ` Niklas Cassel
2019-05-13 11:04 ` [PATCH 1/2] opp: Attach genpds to devices from within OPP core Niklas Cassel
2019-07-04 6:25 ` Rajendra Nayak
2019-07-08 6:01 ` Viresh Kumar [this message]
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