linux-kernel - Re: [PATCH v1 01/16] thermal: core: Introduce .trip

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Message-ID: <CAJZ5v0ggUSk43LGgXLU08svxtdUDbAvX+4Ca0DNTAH0H85i7Rg@mail.gmail.com>
Date: Tue, 23 Apr 2024 19:25:13 +0200
From: "Rafael J. Wysocki" <rafael@...nel.org>
To: Daniel Lezcano <daniel.lezcano@...aro.org>
Cc: "Rafael J. Wysocki" <rjw@...ysocki.net>, Linux PM <linux-pm@...r.kernel.org>, 
	LKML <linux-kernel@...r.kernel.org>, Lukasz Luba <lukasz.luba@....com>, 
	Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>
Subject: Re: [PATCH v1 01/16] thermal: core: Introduce .trip_crossed()
 callback for thermal governors

On Tue, Apr 23, 2024 at 7:14 PM Daniel Lezcano
<daniel.lezcano@...aro.org> wrote:
>
> On 10/04/2024 18:10, Rafael J. Wysocki wrote:
> > From: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
> >
> > Introduce a new thermal governor callback called .trip_crossed()
> > that will be invoked whenever a trip point is crossed by the zone
> > temperature, either on the way up or on the way down.
> >
> > The trip crossing direction information will be passed to it and if
> > multiple trips are crossed in the same direction during one thermal zone
> > update, the new callback will be invoked for them in temperature order,
> > either ascending or descending, depending on the trip crossing
> > direction.
> >
> > Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
> > ---
> >   drivers/thermal/thermal_core.c |   19 +++++++++++++++++--
> >   drivers/thermal/thermal_core.h |    4 ++++
> >   2 files changed, 21 insertions(+), 2 deletions(-)
> >
> > Index: linux-pm/drivers/thermal/thermal_core.c
> > ===================================================================
> > --- linux-pm.orig/drivers/thermal/thermal_core.c
> > +++ linux-pm/drivers/thermal/thermal_core.c
> > @@ -302,11 +302,21 @@ static void monitor_thermal_zone(struct
> >               thermal_zone_device_set_polling(tz, tz->polling_delay_jiffies);
> >   }
> >
> > +static struct thermal_governor *thermal_get_tz_governor(struct thermal_zone_device *tz)
> > +{
> > +     if (tz->governor)
> > +             return tz->governor;
> > +
> > +     return def_governor;
> > +}
> > +
> >   static void handle_non_critical_trips(struct thermal_zone_device *tz,
> >                                     const struct thermal_trip *trip)
> >   {
> > -     tz->governor ? tz->governor->throttle(tz, trip) :
> > -                    def_governor->throttle(tz, trip);
> > +     struct thermal_governor *governor = thermal_get_tz_governor(tz);
> > +
> > +     if (governor->throttle)
> > +             governor->throttle(tz, trip);
> >   }
> >
> >   void thermal_governor_update_tz(struct thermal_zone_device *tz,
> > @@ -470,6 +480,7 @@ static int thermal_trip_notify_cmp(void
> >   void __thermal_zone_device_update(struct thermal_zone_device *tz,
> >                                 enum thermal_notify_event event)
> >   {
> > +     struct thermal_governor *governor = thermal_get_tz_governor(tz);
> >       struct thermal_trip_desc *td;
> >       LIST_HEAD(way_down_list);
> >       LIST_HEAD(way_up_list);
> > @@ -493,12 +504,16 @@ void __thermal_zone_device_update(struct
> >       list_for_each_entry(td, &way_up_list, notify_list_node) {
> >               thermal_notify_tz_trip_up(tz, &td->trip);
> >               thermal_debug_tz_trip_up(tz, &td->trip);
> > +             if (governor->trip_crossed)
> > +                     governor->trip_crossed(tz, &td->trip, true);
>
> Is it possible to wrap this into a function ? So we keep the calls at
> the same level in this block

I can send a separate patch for this if you want me to.

Thanks!