linux-kernel - Re: [PATCH v5 1/3] ACPI: platform-profile: add platform_profile

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Date: Mon, 8 Apr 2024 19:04:58 +0200
From: "Rafael J. Wysocki" <rafael@...nel.org>
To: Hans de Goede <hdegoede@...hat.com>
Cc: Gergo Koteles <soyer@....hu>, "Rafael J. Wysocki" <rafael@...nel.org>, Len Brown <lenb@...nel.org>, 
	Ike Panhc <ike.pan@...onical.com>, Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>, 
	Henrique de Moraes Holschuh <hmh@....eng.br>, Daniel Lezcano <daniel.lezcano@...aro.org>, 
	Barnabás Pőcze <pobrn@...tonmail.com>, 
	linux-acpi@...r.kernel.org, ibm-acpi-devel@...ts.sourceforge.net, 
	platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v5 1/3] ACPI: platform-profile: add platform_profile_cycle()

On Mon, Apr 8, 2024 at 6:41 PM Hans de Goede <hdegoede@...hat.com> wrote:
>
> Hi Gergo,
>
> On 4/6/24 2:01 AM, Gergo Koteles wrote:
> > Some laptops have a key to switch platform profiles.
> >
> > Add a platform_profile_cycle() function to cycle between the enabled
> > profiles.
> >
> > Signed-off-by: Gergo Koteles <soyer@....hu>
>
> Thank you for your patch, 1 small remark below,
> otherwise this looks good to me.
>
> Rafael, may I have your Ack for merging this through the pdx86 tree
> together with the rest of the series once my remark has been addressed ?

Sure, please feel free to add

Acked-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>

to this patch.  Thanks!

> > ---
> >  drivers/acpi/platform_profile.c  | 39 ++++++++++++++++++++++++++++++++
> >  include/linux/platform_profile.h |  1 +
> >  2 files changed, 40 insertions(+)
> >
> > diff --git a/drivers/acpi/platform_profile.c b/drivers/acpi/platform_profile.c
> > index d418462ab791..acc606af812a 100644
> > --- a/drivers/acpi/platform_profile.c
> > +++ b/drivers/acpi/platform_profile.c
> > @@ -136,6 +136,45 @@ void platform_profile_notify(void)
> >  }
> >  EXPORT_SYMBOL_GPL(platform_profile_notify);
> >
> > +int platform_profile_cycle(void)
> > +{
> > +     enum platform_profile_option profile;
> > +     enum platform_profile_option next;
> > +     int err;
> > +
> > +     err = mutex_lock_interruptible(&profile_lock);
> > +     if (err)
> > +             return err;
> > +
> > +     if (!cur_profile) {
> > +             mutex_unlock(&profile_lock);
> > +             return -ENODEV;
> > +     }
> > +
> > +     err = cur_profile->profile_get(cur_profile, &profile);
> > +     if (err) {
> > +             mutex_unlock(&profile_lock);
> > +             return err;
> > +     }
> > +
> > +     next = find_next_bit_wrap(cur_profile->choices,
> > +                               ARRAY_SIZE(profile_names), profile + 1);
> > +
> > +     if (WARN_ON(next == ARRAY_SIZE(profile_names))) {
>
> Other code in drivers/acpi/platform_profile.c uses PLATFORM_PROFILE_LAST
> instead of ARRAY_SIZE(profile_names) (these are guaranteed to be equal)
> please switch to using PLATFORM_PROFILE_LAST for consistency.
>
> Regards,
>
> Hans
>
>
>
>
>
> > +             mutex_unlock(&profile_lock);
> > +             return -EINVAL;
> > +     }
> > +
> > +     err = cur_profile->profile_set(cur_profile, next);
> > +     mutex_unlock(&profile_lock);
> > +
> > +     if (!err)
> > +             sysfs_notify(acpi_kobj, NULL, "platform_profile");
> > +
> > +     return err;
> > +}
> > +EXPORT_SYMBOL_GPL(platform_profile_cycle);
> > +
> >  int platform_profile_register(struct platform_profile_handler *pprof)
> >  {
> >       int err;
> > diff --git a/include/linux/platform_profile.h b/include/linux/platform_profile.h
> > index e5cbb6841f3a..f5492ed413f3 100644
> > --- a/include/linux/platform_profile.h
> > +++ b/include/linux/platform_profile.h
> > @@ -36,6 +36,7 @@ struct platform_profile_handler {
> >
> >  int platform_profile_register(struct platform_profile_handler *pprof);
> >  int platform_profile_remove(void);
> > +int platform_profile_cycle(void);
> >  void platform_profile_notify(void);
> >
> >  #endif  /*_PLATFORM_PROFILE_H_*/
>