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Message-ID: <9dd0f480-a799-418f-bbab-421af8a753b7@gmx.de>
Date: Mon, 19 May 2025 03:58:17 +0200
From: Armin Wolf <W_Armin@....de>
To: Antheas Kapenekakis <lkml@...heas.dev>,
platform-driver-x86@...r.kernel.org
Cc: Jonathan Corbet <corbet@....net>, Hans de Goede <hdegoede@...hat.com>,
Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>,
Jean Delvare <jdelvare@...e.com>, Guenter Roeck <linux@...ck-us.net>,
Kurt Borja <kuurtb@...il.com>, linux-doc@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-hwmon@...r.kernel.org
Subject: Re: [PATCH v1 05/10] platform/x86: msi-wmi-platform: Add platform
profile through shift mode
Am 11.05.25 um 22:44 schrieb Antheas Kapenekakis:
> MSI's version of platform profile in Windows is called shift mode.
> Introduce it here, and add a profile handler to it.
>
> It has 5 modes: sport, comfort, green, eco, and user.
> Confusingly, for the Claw, MSI only uses sport, green, and eco,
> where they correspond to performance, balanced, and low-power.
> Therefore, comfort is mapped to balanced-performance, and user to
> custom.
>
> Signed-off-by: Antheas Kapenekakis <lkml@...heas.dev>
> ---
> drivers/platform/x86/Kconfig | 1 +
> drivers/platform/x86/msi-wmi-platform.c | 117 ++++++++++++++++++++++++
> 2 files changed, 118 insertions(+)
>
> diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig
> index bee98251b8f0b..57a48910c8fd4 100644
> --- a/drivers/platform/x86/Kconfig
> +++ b/drivers/platform/x86/Kconfig
> @@ -746,6 +746,7 @@ config MSI_WMI_PLATFORM
> tristate "MSI WMI Platform features"
> depends on ACPI_WMI
> depends on HWMON
> + select ACPI_PLATFORM_PROFILE
> help
> Say Y here if you want to have support for WMI-based platform features
> like fan sensor access on MSI machines.
> diff --git a/drivers/platform/x86/msi-wmi-platform.c b/drivers/platform/x86/msi-wmi-platform.c
> index 9ac3c6f1b3f1d..c0b577c95c079 100644
> --- a/drivers/platform/x86/msi-wmi-platform.c
> +++ b/drivers/platform/x86/msi-wmi-platform.c
> @@ -17,6 +17,7 @@
> #include <linux/dmi.h>
> #include <linux/errno.h>
> #include <linux/fixp-arith.h>
> +#include <linux/platform_profile.h>
> #include <linux/hwmon.h>
> #include <linux/hwmon-sysfs.h>
> #include <linux/kernel.h>
> @@ -63,6 +64,16 @@
> #define MSI_PLATFORM_AP_FAN_FLAGS_OFFSET 1
> #define MSI_PLATFORM_AP_ENABLE_FAN_TABLES BIT(7)
>
> +/* Get_Data() and Set_Data() Shift Mode Register */
> +#define MSI_PLATFORM_SHIFT_ADDR 0xd2
> +#define MSI_PLATFORM_SHIFT_DISABLE BIT(7)
> +#define MSI_PLATFORM_SHIFT_ENABLE (BIT(7) | BIT(6))
> +#define MSI_PLATFORM_SHIFT_SPORT (MSI_PLATFORM_SHIFT_ENABLE + 4)
> +#define MSI_PLATFORM_SHIFT_COMFORT (MSI_PLATFORM_SHIFT_ENABLE + 0)
> +#define MSI_PLATFORM_SHIFT_GREEN (MSI_PLATFORM_SHIFT_ENABLE + 1)
> +#define MSI_PLATFORM_SHIFT_ECO (MSI_PLATFORM_SHIFT_ENABLE + 2)
> +#define MSI_PLATFORM_SHIFT_USER (MSI_PLATFORM_SHIFT_ENABLE + 3)
> +
Please use a enum for the shift modes and built the final value later using FIELD_PREP().
Also please update the documentation to include the new WMI methods.
> static bool force;
> module_param_unsafe(force, bool, 0);
> MODULE_PARM_DESC(force, "Force loading without checking for supported WMI interface versions");
> @@ -100,12 +111,14 @@ enum msi_wmi_platform_method {
> };
>
> struct msi_wmi_platform_quirk {
> + bool shift_mode; /* Shift mode is supported */
> };
>
> struct msi_wmi_platform_data {
> struct wmi_device *wdev;
> struct msi_wmi_platform_quirk *quirks;
> struct mutex wmi_lock; /* Necessary when calling WMI methods */
> + struct device *ppdev;
> };
>
> struct msi_wmi_platform_debugfs_data {
> @@ -150,8 +163,10 @@ static const char * const msi_wmi_platform_debugfs_names[] = {
>
> static struct msi_wmi_platform_quirk quirk_default = {};
> static struct msi_wmi_platform_quirk quirk_gen1 = {
> + .shift_mode = true
> };
> static struct msi_wmi_platform_quirk quirk_gen2 = {
> + .shift_mode = true
> };
>
> static const struct dmi_system_id msi_quirks[] = {
> @@ -561,6 +576,90 @@ static const struct hwmon_chip_info msi_wmi_platform_chip_info = {
> .info = msi_wmi_platform_info,
> };
>
> +static int msi_wmi_platform_profile_probe(void *drvdata, unsigned long *choices)
> +{
> + set_bit(PLATFORM_PROFILE_LOW_POWER, choices);
> + set_bit(PLATFORM_PROFILE_BALANCED, choices);
> + set_bit(PLATFORM_PROFILE_BALANCED_PERFORMANCE, choices);
> + set_bit(PLATFORM_PROFILE_PERFORMANCE, choices);
> + return 0;
> +}
> +
> +static int msi_wmi_platform_profile_get(struct device *dev,
> + enum platform_profile_option *profile)
> +{
> + struct msi_wmi_platform_data *data = dev_get_drvdata(dev);
> + int ret;
> +
> + u8 buffer[32] = { };
> +
> + buffer[0] = MSI_PLATFORM_SHIFT_ADDR;
> +
> + ret = msi_wmi_platform_query(data, MSI_PLATFORM_GET_DATA, buffer, sizeof(buffer));
> + if (ret < 0)
> + return ret;
> +
> + if (buffer[0] != 1)
> + return -EINVAL;
Please omit this check, msi_wmi_platform_parse_buffer() already takes care of that.
Also could it be that the OEM application uses the Get_AP() WMI method for getting
this value? If yes when please follow this behavior to maximize compatibility.
> +
> + switch (buffer[1]) {
> + case MSI_PLATFORM_SHIFT_SPORT:
> + *profile = PLATFORM_PROFILE_PERFORMANCE;
> + return 0;
> + case MSI_PLATFORM_SHIFT_COMFORT:
> + *profile = PLATFORM_PROFILE_BALANCED_PERFORMANCE;
> + return 0;
> + case MSI_PLATFORM_SHIFT_GREEN:
> + *profile = PLATFORM_PROFILE_BALANCED;
> + return 0;
> + case MSI_PLATFORM_SHIFT_ECO:
> + *profile = PLATFORM_PROFILE_LOW_POWER;
> + return 0;
> + case MSI_PLATFORM_SHIFT_USER:
> + *profile = PLATFORM_PROFILE_CUSTOM;
> + return 0;
> + default:
> + return -EINVAL;
> + }
> +}
> +
> +static int msi_wmi_platform_profile_set(struct device *dev,
> + enum platform_profile_option profile)
> +{
> + struct msi_wmi_platform_data *data = dev_get_drvdata(dev);
> + u8 buffer[32] = { };
> +
> + buffer[0] = MSI_PLATFORM_SHIFT_ADDR;
> +
> + switch (profile) {
> + case PLATFORM_PROFILE_PERFORMANCE:
> + buffer[1] = MSI_PLATFORM_SHIFT_SPORT;
> + break;
> + case PLATFORM_PROFILE_BALANCED_PERFORMANCE:
> + buffer[1] = MSI_PLATFORM_SHIFT_COMFORT;
> + break;
> + case PLATFORM_PROFILE_BALANCED:
> + buffer[1] = MSI_PLATFORM_SHIFT_GREEN;
> + break;
> + case PLATFORM_PROFILE_LOW_POWER:
> + buffer[1] = MSI_PLATFORM_SHIFT_ECO;
> + break;
> + case PLATFORM_PROFILE_CUSTOM:
> + buffer[1] = MSI_PLATFORM_SHIFT_USER;
> + break;
> + default:
> + return -EINVAL;
> + }
> +
> + return msi_wmi_platform_query(data, MSI_PLATFORM_SET_DATA, buffer, sizeof(buffer));
> +}
> +
> +static const struct platform_profile_ops msi_wmi_platform_profile_ops = {
> + .probe = msi_wmi_platform_profile_probe,
> + .profile_get = msi_wmi_platform_profile_get,
> + .profile_set = msi_wmi_platform_profile_set,
> +};
> +
> static ssize_t msi_wmi_platform_debugfs_write(struct file *fp, const char __user *input,
> size_t length, loff_t *offset)
> {
> @@ -742,6 +841,22 @@ static int msi_wmi_platform_init(struct msi_wmi_platform_data *data)
> return 0;
> }
>
> +static int msi_wmi_platform_profile_setup(struct msi_wmi_platform_data *data)
Please rename this function to msi_wmi_platform_profile_init().
> +{
> + int err;
> +
> + if (!data->quirks->shift_mode)
> + return 0;
> +
> + data->ppdev = devm_platform_profile_register(
> + &data->wdev->dev, "msi-wmi-platform", data,
> + &msi_wmi_platform_profile_ops);
Please turn ppdev into a local variable. Also please remove the err variable.
Thanks,
Armin Wolf
> + if (err)
> + return err;
> +
> + return PTR_ERR_OR_ZERO(data->ppdev);
> +}
> +
> static int msi_wmi_platform_probe(struct wmi_device *wdev, const void *context)
> {
> struct msi_wmi_platform_data *data;
> @@ -775,6 +890,8 @@ static int msi_wmi_platform_probe(struct wmi_device *wdev, const void *context)
>
> msi_wmi_platform_debugfs_init(data);
>
> + msi_wmi_platform_profile_setup(data);
> +
> return msi_wmi_platform_hwmon_init(data);
> }
>
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