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| author | Ahmed Yaseen <yaseen@ghoul.dev> | 2026-05-19 18:12:13 +0000 |
|---|---|---|
| committer | Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> | 2026-07-06 11:26:57 +0300 |
| commit | 7bc99dff4d975e850ecb3393811c4264aee24335 (patch) | |
| tree | de4790de042e8937b2122dae9bb2cd816d6e330d /include/linux/platform_data/x86 | |
| parent | 8cdeaa50eae8dad34885515f62559ee83e7e8dda (diff) | |
| download | linux-next-7bc99dff4d975e850ecb3393811c4264aee24335.tar.gz linux-next-7bc99dff4d975e850ecb3393811c4264aee24335.zip | |
platform/x86: asus-armoury: gate PPT writes behind active fan curve
On models flagged with requires_fan_curve in the DMI power_data table
(30 entries), the BIOS ACPI method SPLX only writes PPT values to the
EC when the fan mode is set to Manual (FANM=4). FANM is set to 4 by
the DEFC method when a custom fan curve is written. Without an active
custom fan curve, the WMI DEVS call returns success but the firmware
silently ignores the PPT value, so userspace observes no effect from
its write.
Gate writes to ASUS_WMI_DEVID_PPT_{PL1_SPL,PL2_SPPT,PL3_FPPT,APU_SPPT,
PLAT_SPPT} on a check of asus_wmi_custom_fan_curve_is_enabled(), and
return -EBUSY with a pr_warn_once() when no fan curve is active on an
affected model. Export the helper from asus-wmi so asus-armoury can
call it across module boundaries.
Signed-off-by: Ahmed Yaseen <yaseen@ghoul.dev>
Reviewed-by: Denis Benato <denis.benato@linux.dev>
Link: https://patch.msgid.link/20260519181155.46044-2-yaseen@ghoul.dev
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Diffstat (limited to 'include/linux/platform_data/x86')
| -rw-r--r-- | include/linux/platform_data/x86/asus-wmi.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/platform_data/x86/asus-wmi.h b/include/linux/platform_data/x86/asus-wmi.h index c29962d5baac..b5ed8c83ace1 100644 --- a/include/linux/platform_data/x86/asus-wmi.h +++ b/include/linux/platform_data/x86/asus-wmi.h @@ -203,6 +203,7 @@ int asus_wmi_evaluate_method(u32 method_id, u32 arg0, u32 arg1, u32 *retval); int asus_hid_register_listener(struct asus_hid_listener *cdev); void asus_hid_unregister_listener(struct asus_hid_listener *cdev); int asus_hid_event(enum asus_hid_event event); +bool asus_wmi_custom_fan_curve_is_enabled(void); #else static inline void set_ally_mcu_hack(enum asus_ally_mcu_hack status) { @@ -234,6 +235,10 @@ static inline int asus_hid_event(enum asus_hid_event event) { return -ENODEV; } +static inline bool asus_wmi_custom_fan_curve_is_enabled(void) +{ + return false; +} #endif #endif /* __PLATFORM_DATA_X86_ASUS_WMI_H */ |