linux-kernel - Re: [PATCH v4 1/3] PM: domains: Make set_performance

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Date:   Wed, 20 Jan 2021 10:46:14 +0100
From:   Ulf Hansson <ulf.hansson@...aro.org>
To:     Dmitry Osipenko <digetx@...il.com>
Cc:     Viresh Kumar <viresh.kumar@...aro.org>,
        Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Peter Geis <pgwipeout@...il.com>,
        Nicolas Chauvet <kwizart@...il.com>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Kevin Hilman <khilman@...nel.org>,
        Peter De Schrijver <pdeschrijver@...dia.com>,
        Viresh Kumar <vireshk@...nel.org>,
        Stephen Boyd <sboyd@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Matt Merhar <mattmerhar@...tonmail.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-tegra <linux-tegra@...r.kernel.org>,
        Linux PM <linux-pm@...r.kernel.org>
Subject: Re: [PATCH v4 1/3] PM: domains: Make set_performance_state() callback optional

On Wed, 20 Jan 2021 at 05:39, Viresh Kumar <viresh.kumar@...aro.org> wrote:
>
> On 20-01-21, 04:50, Dmitry Osipenko wrote:
> > Make set_performance_state() callback optional in order to remove the
> > need from power domain drivers to implement a dummy callback. If callback
> > isn't implemented by a GENPD driver, then the performance state is passed
> > to the parent domain.
> >
> > Tested-by: Peter Geis <pgwipeout@...il.com>
> > Tested-by: Nicolas Chauvet <kwizart@...il.com>
> > Tested-by: Matt Merhar <mattmerhar@...tonmail.com>
> > [tested on NVIDIA Tegra20/30/124 SoCs]
> > Suggested-by: Ulf Hansson <ulf.hansson@...aro.org>
> > Signed-off-by: Dmitry Osipenko <digetx@...il.com>
> > ---
> >  drivers/base/power/domain.c | 33 ++++++++++++++++++---------------
> >  1 file changed, 18 insertions(+), 15 deletions(-)
> >
> > diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c
> > index 9a14eedacb92..0bd0cdc30393 100644
> > --- a/drivers/base/power/domain.c
> > +++ b/drivers/base/power/domain.c
> > @@ -297,6 +297,18 @@ static int _genpd_reeval_performance_state(struct generic_pm_domain *genpd,
> >       return state;
> >  }
> >
> > +static int _genpd_xlate_performance_state(struct generic_pm_domain *src_genpd,
> > +                                       struct generic_pm_domain *dst_genpd,
> > +                                       unsigned int pstate)
>
> I would name them as genpd and parent, that makes it more readable for it.

... and while at it, probably also drop the "_" as the prefix of the
function name.

Other than that, please add:

Reviewed-by: Ulf Hansson <ulf.hansson@...aro.org>

Kind regards
Uffe