From 778b94d7ac17b5800aa857222911f09cc986b509 Mon Sep 17 00:00:00 2001
From: Mario Limonciello <mario.limonciello@amd.com>
Date: Fri, 28 Feb 2025 11:01:53 -0600
Subject: [PATCH 1/3] ACPI: platform_profile: Add support for hidden choices
MIME-Version: 1.0
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When two drivers don't support all the same profiles the legacy interface
only exports the common profiles.
This causes problems for cases where one driver uses low-power but another
uses quiet because the result is that neither is exported to sysfs.
To allow two drivers to disagree, add support for "hidden choices".
Hidden choices are platform profiles that a driver supports to be
compatible with the platform profile of another driver.
Fixes: 688834743d67 ("ACPI: platform_profile: Allow multiple handlers")
Reported-by: Antheas Kapenekakis <lkml@antheas.dev>
Closes: https://lore.kernel.org/platform-driver-x86/e64b771e-3255-42ad-9257-5b8fc6c24ac9@gmx.de/T/#mc068042dd29df36c16c8af92664860fc4763974b
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Tested-by: Antheas Kapenekakis <lkml@antheas.dev>
Tested-by: Derek J. Clark <derekjohn.clark@gmail.com>
Acked-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Link: https://patch.msgid.link/20250228170155.2623386-2-superm1@kernel.org
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
drivers/acpi/platform_profile.c | 94 +++++++++++++++++++++++++-------
include/linux/platform_profile.h | 3 +
2 files changed, 76 insertions(+), 21 deletions(-)
diff --git a/drivers/acpi/platform_profile.c b/drivers/acpi/platform_profile.c
index 2ad53cc6aae5..ef9444482db1 100644
--- a/drivers/acpi/platform_profile.c
+++ b/drivers/acpi/platform_profile.c
@@ -21,9 +21,15 @@ struct platform_profile_handler {
struct device dev;
int minor;
unsigned long choices[BITS_TO_LONGS(PLATFORM_PROFILE_LAST)];
+ unsigned long hidden_choices[BITS_TO_LONGS(PLATFORM_PROFILE_LAST)];
const struct platform_profile_ops *ops;
};
+struct aggregate_choices_data {
+ unsigned long aggregate[BITS_TO_LONGS(PLATFORM_PROFILE_LAST)];
+ int count;
+};
+
static const char * const profile_names[] = {
[PLATFORM_PROFILE_LOW_POWER] = "low-power",
[PLATFORM_PROFILE_COOL] = "cool",
@@ -73,7 +79,7 @@ static int _store_class_profile(struct device *dev, void *data)
lockdep_assert_held(&profile_lock);
handler = to_pprof_handler(dev);
- if (!test_bit(*bit, handler->choices))
+ if (!test_bit(*bit, handler->choices) && !test_bit(*bit, handler->hidden_choices))
return -EOPNOTSUPP;
return handler->ops->profile_set(dev, *bit);
@@ -239,21 +245,44 @@ static const struct class platform_profile_class = {
/**
* _aggregate_choices - Aggregate the available profile choices
* @dev: The device
- * @data: The available profile choices
+ * @arg: struct aggregate_choices_data
*
* Return: 0 on success, -errno on failure
*/
-static int _aggregate_choices(struct device *dev, void *data)
+static int _aggregate_choices(struct device *dev, void *arg)
{
+ unsigned long tmp[BITS_TO_LONGS(PLATFORM_PROFILE_LAST)];
+ struct aggregate_choices_data *data = arg;
struct platform_profile_handler *handler;
- unsigned long *aggregate = data;
lockdep_assert_held(&profile_lock);
handler = to_pprof_handler(dev);
- if (test_bit(PLATFORM_PROFILE_LAST, aggregate))
- bitmap_copy(aggregate, handler->choices, PLATFORM_PROFILE_LAST);
+ bitmap_or(tmp, handler->choices, handler->hidden_choices, PLATFORM_PROFILE_LAST);
+ if (test_bit(PLATFORM_PROFILE_LAST, data->aggregate))
+ bitmap_copy(data->aggregate, tmp, PLATFORM_PROFILE_LAST);
else
- bitmap_and(aggregate, handler->choices, aggregate, PLATFORM_PROFILE_LAST);
+ bitmap_and(data->aggregate, tmp, data->aggregate, PLATFORM_PROFILE_LAST);
+ data->count++;
+
+ return 0;
+}
+
+/**
+ * _remove_hidden_choices - Remove hidden choices from aggregate data
+ * @dev: The device
+ * @arg: struct aggregate_choices_data
+ *
+ * Return: 0 on success, -errno on failure
+ */
+static int _remove_hidden_choices(struct device *dev, void *arg)
+{
+ struct aggregate_choices_data *data = arg;
+ struct platform_profile_handler *handler;
+
+ lockdep_assert_held(&profile_lock);
+ handler = to_pprof_handler(dev);
+ bitmap_andnot(data->aggregate, handler->choices,
+ handler->hidden_choices, PLATFORM_PROFILE_LAST);
return 0;
}
@@ -270,22 +299,31 @@ static ssize_t platform_profile_choices_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
- unsigned long aggregate[BITS_TO_LONGS(PLATFORM_PROFILE_LAST)];
+ struct aggregate_choices_data data = {
+ .aggregate = { [0 ... BITS_TO_LONGS(PLATFORM_PROFILE_LAST) - 1] = ~0UL },
+ .count = 0,
+ };
int err;
- set_bit(PLATFORM_PROFILE_LAST, aggregate);
+ set_bit(PLATFORM_PROFILE_LAST, data.aggregate);
scoped_cond_guard(mutex_intr, return -ERESTARTSYS, &profile_lock) {
err = class_for_each_device(&platform_profile_class, NULL,
- aggregate, _aggregate_choices);
+ &data, _aggregate_choices);
if (err)
return err;
+ if (data.count == 1) {
+ err = class_for_each_device(&platform_profile_class, NULL,
+ &data, _remove_hidden_choices);
+ if (err)
+ return err;
+ }
}
/* no profile handler registered any more */
- if (bitmap_empty(aggregate, PLATFORM_PROFILE_LAST))
+ if (bitmap_empty(data.aggregate, PLATFORM_PROFILE_LAST))
return -EINVAL;
- return _commmon_choices_show(aggregate, buf);
+ return _commmon_choices_show(data.aggregate, buf);
}
/**
@@ -373,7 +411,10 @@ static ssize_t platform_profile_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
- unsigned long choices[BITS_TO_LONGS(PLATFORM_PROFILE_LAST)];
+ struct aggregate_choices_data data = {
+ .aggregate = { [0 ... BITS_TO_LONGS(PLATFORM_PROFILE_LAST) - 1] = ~0UL },
+ .count = 0,
+ };
int ret;
int i;
@@ -381,13 +422,13 @@ static ssize_t platform_profile_store(struct device *dev,
i = sysfs_match_string(profile_names, buf);
if (i < 0 || i == PLATFORM_PROFILE_CUSTOM)
return -EINVAL;
- set_bit(PLATFORM_PROFILE_LAST, choices);
+ set_bit(PLATFORM_PROFILE_LAST, data.aggregate);
scoped_cond_guard(mutex_intr, return -ERESTARTSYS, &profile_lock) {
ret = class_for_each_device(&platform_profile_class, NULL,
- choices, _aggregate_choices);
+ &data, _aggregate_choices);
if (ret)
return ret;
- if (!test_bit(i, choices))
+ if (!test_bit(i, data.aggregate))
return -EOPNOTSUPP;
ret = class_for_each_device(&platform_profile_class, NULL, &i,
@@ -453,12 +494,15 @@ EXPORT_SYMBOL_GPL(platform_profile_notify);
*/
int platform_profile_cycle(void)
{
+ struct aggregate_choices_data data = {
+ .aggregate = { [0 ... BITS_TO_LONGS(PLATFORM_PROFILE_LAST) - 1] = ~0UL },
+ .count = 0,
+ };
enum platform_profile_option next = PLATFORM_PROFILE_LAST;
enum platform_profile_option profile = PLATFORM_PROFILE_LAST;
- unsigned long choices[BITS_TO_LONGS(PLATFORM_PROFILE_LAST)];
int err;
- set_bit(PLATFORM_PROFILE_LAST, choices);
+ set_bit(PLATFORM_PROFILE_LAST, data.aggregate);
scoped_cond_guard(mutex_intr, return -ERESTARTSYS, &profile_lock) {
err = class_for_each_device(&platform_profile_class, NULL,
&profile, _aggregate_profiles);
@@ -470,14 +514,14 @@ int platform_profile_cycle(void)
return -EINVAL;
err = class_for_each_device(&platform_profile_class, NULL,
- choices, _aggregate_choices);
+ &data, _aggregate_choices);
if (err)
return err;
/* never iterate into a custom if all drivers supported it */
- clear_bit(PLATFORM_PROFILE_CUSTOM, choices);
+ clear_bit(PLATFORM_PROFILE_CUSTOM, data.aggregate);
- next = find_next_bit_wrap(choices,
+ next = find_next_bit_wrap(data.aggregate,
PLATFORM_PROFILE_LAST,
profile + 1);
@@ -532,6 +576,14 @@ struct device *platform_profile_register(struct device *dev, const char *name,
return ERR_PTR(-EINVAL);
}
+ if (ops->hidden_choices) {
+ err = ops->hidden_choices(drvdata, pprof->hidden_choices);
+ if (err) {
+ dev_err(dev, "platform_profile hidden_choices failed\n");
+ return ERR_PTR(err);
+ }
+ }
+
guard(mutex)(&profile_lock);
/* create class interface for individual handler */
diff --git a/include/linux/platform_profile.h b/include/linux/platform_profile.h
index 8ab5b0e8eb2c..8c9df7dadd5d 100644
--- a/include/linux/platform_profile.h
+++ b/include/linux/platform_profile.h
@@ -33,6 +33,8 @@ enum platform_profile_option {
* @probe: Callback to setup choices available to the new class device. These
* choices will only be enforced when setting a new profile, not when
* getting the current one.
+ * @hidden_choices: Callback to setup choices that are not visible to the user
+ * but can be set by the driver.
* @profile_get: Callback that will be called when showing the current platform
* profile in sysfs.
* @profile_set: Callback that will be called when storing a new platform
@@ -40,6 +42,7 @@ enum platform_profile_option {
*/
struct platform_profile_ops {
int (*probe)(void *drvdata, unsigned long *choices);
+ int (*hidden_choices)(void *drvdata, unsigned long *choices);
int (*profile_get)(struct device *dev, enum platform_profile_option *profile);
int (*profile_set)(struct device *dev, enum platform_profile_option profile);
};
From 44e94fece5170ed9110564efec592d0e88830a28 Mon Sep 17 00:00:00 2001
From: Mario Limonciello <mario.limonciello@amd.com>
Date: Fri, 28 Feb 2025 11:01:54 -0600
Subject: [PATCH 2/3] platform/x86/amd: pmf: Add 'quiet' to hidden choices
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
When amd-pmf and asus-wmi are both bound no low power option shows
up in sysfs. Add a hidden choice for amd-pmf to support 'quiet' mode
to let both bind.
Fixes: 688834743d67 ("ACPI: platform_profile: Allow multiple handlers")
Suggested-by: Antheas Kapenekakis <lkml@antheas.dev>
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Tested-by: Antheas Kapenekakis <lkml@antheas.dev>
Tested-by: Derek J. Clark <derekjohn.clark@gmail.com>
Acked-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Link: https://patch.msgid.link/20250228170155.2623386-3-superm1@kernel.org
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
drivers/platform/x86/amd/pmf/sps.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/drivers/platform/x86/amd/pmf/sps.c b/drivers/platform/x86/amd/pmf/sps.c
index e6cf0b22dac3..3a0079c17cb1 100644
--- a/drivers/platform/x86/amd/pmf/sps.c
+++ b/drivers/platform/x86/amd/pmf/sps.c
@@ -303,6 +303,7 @@ int amd_pmf_get_pprof_modes(struct amd_pmf_dev *pmf)
mode = POWER_MODE_BALANCED_POWER;
break;
case PLATFORM_PROFILE_LOW_POWER:
+ case PLATFORM_PROFILE_QUIET:
mode = POWER_MODE_POWER_SAVER;
break;
default:
@@ -387,6 +388,13 @@ static int amd_pmf_profile_set(struct device *dev,
return 0;
}
+static int amd_pmf_hidden_choices(void *drvdata, unsigned long *choices)
+{
+ set_bit(PLATFORM_PROFILE_QUIET, choices);
+
+ return 0;
+}
+
static int amd_pmf_profile_probe(void *drvdata, unsigned long *choices)
{
set_bit(PLATFORM_PROFILE_LOW_POWER, choices);
@@ -398,6 +406,7 @@ static int amd_pmf_profile_probe(void *drvdata, unsigned long *choices)
static const struct platform_profile_ops amd_pmf_profile_ops = {
.probe = amd_pmf_profile_probe,
+ .hidden_choices = amd_pmf_hidden_choices,
.profile_get = amd_pmf_profile_get,
.profile_set = amd_pmf_profile_set,
};
From 9a43102daf64dd0d172d8b39836dbc1dba4da1ea Mon Sep 17 00:00:00 2001
From: Mario Limonciello <mario.limonciello@amd.com>
Date: Fri, 28 Feb 2025 11:01:55 -0600
Subject: [PATCH 3/3] platform/x86/amd: pmf: Add balanced-performance to hidden
choices
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Acer's WMI driver uses balanced-performance but AMD-PMF doesn't.
In case a machine binds with both drivers let amd-pmf use
balanced-performance as well.
Fixes: 688834743d67 ("ACPI: platform_profile: Allow multiple handlers")
Suggested-by: Antheas Kapenekakis <lkml@antheas.dev>
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Tested-by: Antheas Kapenekakis <lkml@antheas.dev>
Tested-by: Derek J. Clark <derekjohn.clark@gmail.com>
Acked-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Link: https://patch.msgid.link/20250228170155.2623386-4-superm1@kernel.org
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
drivers/platform/x86/amd/pmf/sps.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/platform/x86/amd/pmf/sps.c b/drivers/platform/x86/amd/pmf/sps.c
index 3a0079c17cb1..d3083383f11f 100644
--- a/drivers/platform/x86/amd/pmf/sps.c
+++ b/drivers/platform/x86/amd/pmf/sps.c
@@ -297,6 +297,7 @@ int amd_pmf_get_pprof_modes(struct amd_pmf_dev *pmf)
switch (pmf->current_profile) {
case PLATFORM_PROFILE_PERFORMANCE:
+ case PLATFORM_PROFILE_BALANCED_PERFORMANCE:
mode = POWER_MODE_PERFORMANCE;
break;
case PLATFORM_PROFILE_BALANCED:
@@ -391,6 +392,7 @@ static int amd_pmf_profile_set(struct device *dev,
static int amd_pmf_hidden_choices(void *drvdata, unsigned long *choices)
{
set_bit(PLATFORM_PROFILE_QUIET, choices);
+ set_bit(PLATFORM_PROFILE_BALANCED_PERFORMANCE, choices);
return 0;
}