// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Lenovo GameZone WMI interface driver .
*
* The GameZone WMI interface provides platform profile and fan curve settings
* for devices that fall under the " Gaming Series " of Lenovo Legion devices .
*
* Copyright ( C ) 2025 Derek J . Clark < derekjohn . clark @ gmail . com >
*/
#include <linux/acpi.h>
#include <linux/dmi.h>
#include <linux/export.h>
#include <linux/list.h>
#include <linux/module.h>
#include <linux/notifier.h>
#include <linux/platform_profile.h>
#include <linux/spinlock.h>
#include <linux/spinlock_types.h>
#include <linux/types.h>
#include <linux/wmi.h>
#include "wmi-events.h"
#include "wmi-gamezone.h"
#include "wmi-helpers.h"
#include "wmi-other.h"
#define LENOVO_GAMEZONE_GUID "887B54E3-DDDC-4B2C-8B88-68A26A8835D0"
#define LWMI_GZ_METHOD_ID_SMARTFAN_SUP 43
#define LWMI_GZ_METHOD_ID_SMARTFAN_SET 44
#define LWMI_GZ_METHOD_ID_SMARTFAN_GET 45
static BLOCKING_NOTIFIER_HEAD(gz_chain_head);
struct lwmi_gz_priv {
enum thermal_mode current_mode;
struct notifier_block event_nb;
struct notifier_block mode_nb;
spinlock_t gz_mode_lock; /* current_mode lock */
struct wmi_device *wdev;
int extreme_supported;
struct device *ppdev;
};
struct quirk_entry {
bool extreme_supported;
};
static struct quirk_entry quirk_no_extreme_bug = {
.extreme_supported = false ,
};
/**
* lwmi_gz_mode_call ( ) - Call method for lenovo - wmi - other driver notifier .
*
* @ nb : The notifier_block registered to lenovo - wmi - other driver .
* @ cmd : The event type .
* @ data : Thermal mode enum pointer pointer for returning the thermal mode .
*
* For LWMI_GZ_GET_THERMAL_MODE , retrieve the current thermal mode .
*
* Return : Notifier_block status .
*/
static int lwmi_gz_mode_call(struct notifier_block *nb, unsigned long cmd,
void *data)
{
enum thermal_mode **mode = data;
struct lwmi_gz_priv *priv;
priv = container_of(nb, struct lwmi_gz_priv, mode_nb);
switch (cmd) {
case LWMI_GZ_GET_THERMAL_MODE:
scoped_guard(spinlock, &priv->gz_mode_lock) {
**mode = priv->current_mode;
}
return NOTIFY_OK;
default :
return NOTIFY_DONE;
}
}
/**
* lwmi_gz_event_call ( ) - Call method for lenovo - wmi - events driver notifier .
* block call chain .
* @ nb : The notifier_block registered to lenovo - wmi - events driver .
* @ cmd : The event type .
* @ data : The data to be updated by the event .
*
* For LWMI_EVENT_THERMAL_MODE , set current_mode and notify platform_profile
* of a change .
*
* Return : notifier_block status .
*/
static int lwmi_gz_event_call(struct notifier_block *nb, unsigned long cmd,
void *data)
{
enum thermal_mode *mode = data;
struct lwmi_gz_priv *priv;
priv = container_of(nb, struct lwmi_gz_priv, event_nb);
switch (cmd) {
case LWMI_EVENT_THERMAL_MODE:
scoped_guard(spinlock, &priv->gz_mode_lock) {
priv->current_mode = *mode;
}
platform_profile_notify(priv->ppdev);
return NOTIFY_STOP;
default :
return NOTIFY_DONE;
}
}
/**
* lwmi_gz_thermal_mode_supported ( ) - Get the version of the WMI
* interface to determine the support level .
* @ wdev : The Gamezone WMI device .
* @ supported : Pointer to return the support level with .
*
* Return : 0 on success , or an error code .
*/
static int lwmi_gz_thermal_mode_supported(struct wmi_device *wdev,
int *supported)
{
return lwmi_dev_evaluate_int(wdev, 0 x0, LWMI_GZ_METHOD_ID_SMARTFAN_SUP,
NULL, 0 , supported);
}
/**
* lwmi_gz_thermal_mode_get ( ) - Get the current thermal mode .
* @ wdev : The Gamezone interface WMI device .
* @ mode : Pointer to return the thermal mode with .
*
* Return : 0 on success , or an error code .
*/
static int lwmi_gz_thermal_mode_get(struct wmi_device *wdev,
enum thermal_mode *mode)
{
return lwmi_dev_evaluate_int(wdev, 0 x0, LWMI_GZ_METHOD_ID_SMARTFAN_GET,
NULL, 0 , mode);
}
/**
* lwmi_gz_profile_get ( ) - Get the current platform profile .
* @ dev : the Gamezone interface parent device .
* @ profile : Pointer to provide the current platform profile with .
*
* Call lwmi_gz_thermal_mode_get and convert the thermal mode into a platform
* profile based on the support level of the interface .
*
* Return : 0 on success , or an error code .
*/
static int lwmi_gz_profile_get(struct device *dev,
enum platform_profile_option *profile)
{
struct lwmi_gz_priv *priv = dev_get_drvdata(dev);
enum thermal_mode mode;
int ret;
ret = lwmi_gz_thermal_mode_get(priv->wdev, &mode);
if (ret)
return ret;
switch (mode) {
case LWMI_GZ_THERMAL_MODE_QUIET:
*profile = PLATFORM_PROFILE_LOW_POWER;
break ;
case LWMI_GZ_THERMAL_MODE_BALANCED:
*profile = PLATFORM_PROFILE_BALANCED;
break ;
case LWMI_GZ_THERMAL_MODE_PERFORMANCE:
if (priv->extreme_supported) {
*profile = PLATFORM_PROFILE_BALANCED_PERFORMANCE;
break ;
}
*profile = PLATFORM_PROFILE_PERFORMANCE;
break ;
case LWMI_GZ_THERMAL_MODE_EXTREME:
*profile = PLATFORM_PROFILE_PERFORMANCE;
break ;
case LWMI_GZ_THERMAL_MODE_CUSTOM:
*profile = PLATFORM_PROFILE_CUSTOM;
break ;
default :
return -EINVAL;
}
guard(spinlock)(&priv->gz_mode_lock);
priv->current_mode = mode;
return 0 ;
}
/**
* lwmi_gz_profile_set ( ) - Set the current platform profile .
* @ dev : The Gamezone interface parent device .
* @ profile : Pointer to the desired platform profile .
*
* Convert the given platform profile into a thermal mode based on the support
* level of the interface , then call the WMI method to set the thermal mode .
*
* Return : 0 on success , or an error code .
*/
static int lwmi_gz_profile_set(struct device *dev,
enum platform_profile_option profile)
{
struct lwmi_gz_priv *priv = dev_get_drvdata(dev);
struct wmi_method_args_32 args;
enum thermal_mode mode;
int ret;
switch (profile) {
case PLATFORM_PROFILE_LOW_POWER:
mode = LWMI_GZ_THERMAL_MODE_QUIET;
break ;
case PLATFORM_PROFILE_BALANCED:
mode = LWMI_GZ_THERMAL_MODE_BALANCED;
break ;
case PLATFORM_PROFILE_BALANCED_PERFORMANCE:
mode = LWMI_GZ_THERMAL_MODE_PERFORMANCE;
break ;
case PLATFORM_PROFILE_PERFORMANCE:
if (priv->extreme_supported) {
mode = LWMI_GZ_THERMAL_MODE_EXTREME;
break ;
}
mode = LWMI_GZ_THERMAL_MODE_PERFORMANCE;
break ;
case PLATFORM_PROFILE_CUSTOM:
mode = LWMI_GZ_THERMAL_MODE_CUSTOM;
break ;
default :
return -EOPNOTSUPP;
}
args.arg0 = mode;
ret = lwmi_dev_evaluate_int(priv->wdev, 0 x0,
LWMI_GZ_METHOD_ID_SMARTFAN_SET,
(u8 *)&args, sizeof (args), NULL);
if (ret)
return ret;
guard(spinlock)(&priv->gz_mode_lock);
priv->current_mode = mode;
return 0 ;
}
static const struct dmi_system_id fwbug_list[] = {
{
.ident = "Legion Go 8APU1" ,
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "LENOVO" ),
DMI_MATCH(DMI_PRODUCT_VERSION, "Legion Go 8APU1" ),
},
.driver_data = &quirk_no_extreme_bug,
},
{
.ident = "Legion Go S 8APU1" ,
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "LENOVO" ),
DMI_MATCH(DMI_PRODUCT_VERSION, "Legion Go S 8APU1" ),
},
.driver_data = &quirk_no_extreme_bug,
},
{
.ident = "Legion Go S 8ARP1" ,
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "LENOVO" ),
DMI_MATCH(DMI_PRODUCT_VERSION, "Legion Go S 8ARP1" ),
},
.driver_data = &quirk_no_extreme_bug,
},
{},
};
/**
* lwmi_gz_extreme_supported ( ) - Evaluate if a device supports extreme thermal mode .
* @ profile_support_ver : Version of the WMI interface .
*
* Determine if the extreme thermal mode is supported by the hardware .
* Anything version 5 or lower does not . For devices with a version 6 or
* greater do a DMI check , as some devices report a version that supports
* extreme mode but have an incomplete entry in the BIOS . To ensure this
* cannot be set , quirk them to prevent assignment .
*
* Return : bool .
*/
static bool lwmi_gz_extreme_supported(int profile_support_ver)
{
const struct dmi_system_id *dmi_id;
struct quirk_entry *quirks;
if (profile_support_ver < 6 )
return false ;
dmi_id = dmi_first_match(fwbug_list);
if (!dmi_id)
return true ;
quirks = dmi_id->driver_data;
return quirks->extreme_supported;
}
/**
* lwmi_gz_platform_profile_probe - Enable and set up the platform profile
* device .
* @ drvdata : Driver data for the interface .
* @ choices : Container for enabled platform profiles .
*
* Determine if thermal mode is supported , and if so to what feature level .
* Then enable all supported platform profiles .
*
* Return : 0 on success , or an error code .
*/
static int lwmi_gz_platform_profile_probe(void *drvdata, unsigned long *choices)
{
struct lwmi_gz_priv *priv = drvdata;
int profile_support_ver;
int ret;
ret = lwmi_gz_thermal_mode_supported(priv->wdev, &profile_support_ver);
if (ret)
return ret;
if (profile_support_ver < 1 )
return -ENODEV;
set_bit(PLATFORM_PROFILE_LOW_POWER, choices);
set_bit(PLATFORM_PROFILE_BALANCED, choices);
set_bit(PLATFORM_PROFILE_PERFORMANCE, choices);
set_bit(PLATFORM_PROFILE_CUSTOM, choices);
priv->extreme_supported = lwmi_gz_extreme_supported(profile_support_ver);
if (priv->extreme_supported)
set_bit(PLATFORM_PROFILE_BALANCED_PERFORMANCE, choices);
return 0 ;
}
static const struct platform_profile_ops lwmi_gz_platform_profile_ops = {
.probe = lwmi_gz_platform_profile_probe,
.profile_get = lwmi_gz_profile_get,
.profile_set = lwmi_gz_profile_set,
};
static int lwmi_gz_probe(struct wmi_device *wdev, const void *context)
{
struct lwmi_gz_priv *priv;
int ret;
priv = devm_kzalloc(&wdev->dev, sizeof (*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
priv->wdev = wdev;
dev_set_drvdata(&wdev->dev, priv);
priv->ppdev = devm_platform_profile_register(&wdev->dev, "lenovo-wmi-gamezone" ,
priv, &lwmi_gz_platform_profile_ops);
if (IS_ERR(priv->ppdev))
return -ENODEV;
spin_lock_init(&priv->gz_mode_lock);
ret = lwmi_gz_thermal_mode_get(wdev, &priv->current_mode);
if (ret)
return ret;
priv->event_nb.notifier_call = lwmi_gz_event_call;
ret = devm_lwmi_events_register_notifier(&wdev->dev, &priv->event_nb);
if (ret)
return ret;
priv->mode_nb.notifier_call = lwmi_gz_mode_call;
return devm_lwmi_om_register_notifier(&wdev->dev, &priv->mode_nb);
}
static const struct wmi_device_id lwmi_gz_id_table[] = {
{ LENOVO_GAMEZONE_GUID, NULL },
{}
};
static struct wmi_driver lwmi_gz_driver = {
.driver = {
.name = "lenovo_wmi_gamezone" ,
.probe_type = PROBE_PREFER_ASYNCHRONOUS,
},
.id_table = lwmi_gz_id_table,
.probe = lwmi_gz_probe,
.no_singleton = true ,
};
module_wmi_driver(lwmi_gz_driver);
MODULE_IMPORT_NS("LENOVO_WMI_EVENTS" );
MODULE_IMPORT_NS("LENOVO_WMI_HELPERS" );
MODULE_IMPORT_NS("LENOVO_WMI_OTHER" );
MODULE_DEVICE_TABLE(wmi, lwmi_gz_id_table);
MODULE_AUTHOR("Derek J. Clark <derekjohn.clark@gmail.com>" );
MODULE_DESCRIPTION("Lenovo GameZone WMI Driver" );
MODULE_LICENSE("GPL" );
Messung V0.5 in Prozent C=96 H=93 G=94
¤ Dauer der Verarbeitung: 0.6 Sekunden
¤
*© Formatika GbR, Deutschland