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[PATCH v4 1/3] ACPI: platform-profile: add platform_profile_cycle()

Gergo Koteles posted 3 patches 1 year, 10 months ago
There is a newer version of this series
[PATCH v4 1/3] ACPI: platform-profile: add platform_profile_cycle()
Posted by Gergo Koteles 1 year, 10 months ago 
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@irl.hu>
---
 drivers/acpi/platform_profile.c  | 42 ++++++++++++++++++++++++++++++++
 include/linux/platform_profile.h |  1 +
 2 files changed, 43 insertions(+)

diff --git a/drivers/acpi/platform_profile.c b/drivers/acpi/platform_profile.c
index d418462ab791..1579f380d469 100644
--- a/drivers/acpi/platform_profile.c
+++ b/drivers/acpi/platform_profile.c
@@ -136,6 +136,48 @@ 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 = ffs(cur_profile->choices[0] >> (profile + 1)) + profile;
+
+	/* current profile is the highest, select the lowest */
+	if (next == profile)
+		next = ffs(cur_profile->choices[0]) - 1;
+
+	if (WARN_ON((next < 0) || (next >= ARRAY_SIZE(profile_names)))) {
+		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_*/
-- 
2.44.0
Re: [PATCH v4 1/3] ACPI: platform-profile: add platform_profile_cycle()
Posted by Barnabás Pőcze 1 year, 10 months ago 
Hi


2024. április 5., péntek 5:05 keltezéssel, Gergo Koteles <soyer@irl.hu> írta:

> 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@irl.hu>
> ---
>  drivers/acpi/platform_profile.c  | 42 ++++++++++++++++++++++++++++++++
>  include/linux/platform_profile.h |  1 +
>  2 files changed, 43 insertions(+)
> 
> diff --git a/drivers/acpi/platform_profile.c b/drivers/acpi/platform_profile.c
> index d418462ab791..1579f380d469 100644
> --- a/drivers/acpi/platform_profile.c
> +++ b/drivers/acpi/platform_profile.c
> @@ -136,6 +136,48 @@ 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 = ffs(cur_profile->choices[0] >> (profile + 1)) + profile;
> +
> +	/* current profile is the highest, select the lowest */
> +	if (next == profile)
> +		next = ffs(cur_profile->choices[0]) - 1;

I think you can use `find_next_bit()` or similar instead.


> +
> +	if (WARN_ON((next < 0) || (next >= ARRAY_SIZE(profile_names)))) {
> +		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_*/
> --
> 2.44.0
> 


Regards,
Barnabás Pőcze
Re: [PATCH v4 1/3] ACPI: platform-profile: add platform_profile_cycle()
Posted by Gergo Koteles 1 year, 10 months ago 
Hi Barnabás,

On Fri, 2024-04-05 at 16:34 +0000, Barnabás Pőcze wrote:
> > +	next = ffs(cur_profile->choices[0] >> (profile + 1)) + profile;
> > +
> > +	/* current profile is the highest, select the lowest */
> > +	if (next == profile)
> > +		next = ffs(cur_profile->choices[0]) - 1;
> 
> I think you can use `find_next_bit()` or similar instead.
> 

Thanks, it looks much better with find_next_bit_wrap.

> 
Best regards,
Gergo
Re: [PATCH v4 1/3] ACPI: platform-profile: add platform_profile_cycle()
Posted by Daniel Lezcano 1 year, 10 months ago 
Hi Gergo,

please Cc people who commented your changes.

see below:

On 05/04/2024 05:05, 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@irl.hu>
> ---
>   drivers/acpi/platform_profile.c  | 42 ++++++++++++++++++++++++++++++++
>   include/linux/platform_profile.h |  1 +
>   2 files changed, 43 insertions(+)
> 
> diff --git a/drivers/acpi/platform_profile.c b/drivers/acpi/platform_profile.c
> index d418462ab791..1579f380d469 100644
> --- a/drivers/acpi/platform_profile.c
> +++ b/drivers/acpi/platform_profile.c
> @@ -136,6 +136,48 @@ 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 = ffs(cur_profile->choices[0] >> (profile + 1)) + profile;
> +
> +	/* current profile is the highest, select the lowest */
> +	if (next == profile)
> +		next = ffs(cur_profile->choices[0]) - 1;
> +
> +	if (WARN_ON((next < 0) || (next >= ARRAY_SIZE(profile_names)))) {
> +		mutex_unlock(&profile_lock);
> +		return -EINVAL;
> +	}

Why do you need to do this?

That can be simplified by:

	[ ... ]

	err = cur_profile->profile_get(cur_profile, &profile);
	if (err)
		goto out;

	profile = (profile + 1) % ARRAY_SIZE(profile_names);

	err = cur_profile->profile_set(cur_profile, next);
out:
	mutex_unlock(&profile_lock);
	
	[ ... ]

> +	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_*/

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Re: [PATCH v4 1/3] ACPI: platform-profile: add platform_profile_cycle()
Posted by Gergo Koteles 1 year, 10 months ago 
Hi Daniel,

On Fri, 2024-04-05 at 08:48 +0200, Daniel Lezcano wrote:
> Hi Gergo,
> 
> please Cc people who commented your changes.

Thanks for this info, next time :)

> > +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 = ffs(cur_profile->choices[0] >> (profile + 1)) + profile;
> > +
> > +	/* current profile is the highest, select the lowest */
> > +	if (next == profile)
> > +		next = ffs(cur_profile->choices[0]) - 1;
> > +
> > +	if (WARN_ON((next < 0) || (next >= ARRAY_SIZE(profile_names)))) {
> > +		mutex_unlock(&profile_lock);
> > +		return -EINVAL;
> > +	}
> 
> Why do you need to do this?
> 

Many platform drivers use the platform profile module. They support
different sets of profiles, not all. They sets the corresponding bits
in the choices variable.

like this:
set_bit(PLATFORM_PROFILE_BALANCED, platform_profile_handler.choices);

The platform_profile_cycle() cycles through the enabled profiles.

Best regards,
Gergo

> That can be simplified by:
> 
> 	[ ... ]
> 
> 	err = cur_profile->profile_get(cur_profile, &profile);
> 	if (err)
> 		goto out;
> 
> 	profile = (profile + 1) % ARRAY_SIZE(profile_names);
> 
> 	err = cur_profile->profile_set(cur_profile, next);
> out:
> 	mutex_unlock(&profile_lock);
> 	
> 	[ ... ]
> 
> > +	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_*/
>

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