On Sun May 11, 2025 at 5:44 PM -03, Antheas Kapenekakis wrote:
> MSI uses the WMI interface as a passthrough for writes to the EC
> and uses a board name match and a quirk table from userspace on
> Windows. Therefore, there is no auto-detection functionality and
> we have to fallback to a quirk table.
>
> Introduce it here, prior to starting to add features to it.
>
> Signed-off-by: Antheas Kapenekakis <lkml@xxxxxxxxxxx>
> ---
> drivers/platform/x86/msi-wmi-platform.c | 45 +++++++++++++++++++++++++
> 1 file changed, 45 insertions(+)
>
> diff --git a/drivers/platform/x86/msi-wmi-platform.c b/drivers/platform/x86/msi-wmi-platform.c
> index f0d1b8e1a2fec..408d42ab19e20 100644
> --- a/drivers/platform/x86/msi-wmi-platform.c
> +++ b/drivers/platform/x86/msi-wmi-platform.c
> @@ -14,6 +14,7 @@
> #include <linux/debugfs.h>
> #include <linux/device.h>
> #include <linux/device/driver.h>
> +#include <linux/dmi.h>
> #include <linux/errno.h>
> #include <linux/hwmon.h>
> #include <linux/kernel.h>
> @@ -79,8 +80,12 @@ enum msi_wmi_platform_method {
> MSI_PLATFORM_GET_WMI = 0x1d,
> };
>
> +struct msi_wmi_platform_quirk {
> +};
> +
> struct msi_wmi_platform_data {
> struct wmi_device *wdev;
> + struct msi_wmi_platform_quirk *quirks;
> struct mutex wmi_lock; /* Necessary when calling WMI methods */
> };
>
> @@ -124,6 +129,39 @@ static const char * const msi_wmi_platform_debugfs_names[] = {
> "get_wmi"
> };
>
> +static struct msi_wmi_platform_quirk quirk_default = {};
This is static, you can drop the `= {}`.
> +static struct msi_wmi_platform_quirk quirk_gen1 = {
> +};
> +static struct msi_wmi_platform_quirk quirk_gen2 = {
> +};
> +
> +static const struct dmi_system_id msi_quirks[] = {
This should be moved to an .init section, i.e. marked as __initconst.
To achieve this, you have to move DMI matching to module_init and
*quirks most be static.
This way this memory can be freed after init.
--
~ Kurt
> + {
> + .ident = "MSI Claw (gen 1)",
> + .matches = {
> + DMI_MATCH(DMI_SYS_VENDOR, "Micro-Star International Co., Ltd."),
> + DMI_MATCH(DMI_BOARD_NAME, "MS-1T41"),
> + },
> + .driver_data = &quirk_gen1,
> + },
> + {
> + .ident = "MSI Claw AI+ 7",
> + .matches = {
> + DMI_MATCH(DMI_SYS_VENDOR, "Micro-Star International Co., Ltd."),
> + DMI_MATCH(DMI_BOARD_NAME, "MS-1T42"),
> + },
> + .driver_data = &quirk_gen2,
> + },
> + {
> + .ident = "MSI Claw AI+ 8",
> + .matches = {
> + DMI_MATCH(DMI_SYS_VENDOR, "Micro-Star International Co., Ltd."),
> + DMI_MATCH(DMI_BOARD_NAME, "MS-1T52"),
> + },
> + .driver_data = &quirk_gen2,
> + },
> +};
> +
> static int msi_wmi_platform_parse_buffer(union acpi_object *obj, u8 *output, size_t length)
> {
> if (obj->type != ACPI_TYPE_BUFFER)
> @@ -413,6 +451,7 @@ static int msi_wmi_platform_init(struct msi_wmi_platform_data *data)
> static int msi_wmi_platform_probe(struct wmi_device *wdev, const void *context)
> {
> struct msi_wmi_platform_data *data;
> + const struct dmi_system_id *dmi_id;
> int ret;
>
> data = devm_kzalloc(&wdev->dev, sizeof(*data), GFP_KERNEL);
> @@ -422,6 +461,12 @@ static int msi_wmi_platform_probe(struct wmi_device *wdev, const void *context)
> data->wdev = wdev;
> dev_set_drvdata(&wdev->dev, data);
>
> + dmi_id = dmi_first_match(msi_quirks);
> + if (dmi_id)
> + data->quirks = dmi_id->driver_data;
> + else
> + data->quirks = &quirk_default;
> +
> ret = devm_mutex_init(&wdev->dev, &data->wmi_lock);
> if (ret < 0)
> return ret;
Attachment:
signature.asc
Description: PGP signature
