linux-kernel - [PATCH v2 0/2] platform/x86: hp-wmi: Add manual fan support for Victus S laptops

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Message-ID: <20251230145053.516196-1-krishna.chomal108@gmail.com>
Date: Tue, 30 Dec 2025 20:20:51 +0530
From: Krishna Chomal <krishna.chomal108@...il.com>
To: ilpo.jarvinen@...ux.intel.com,
	hansg@...nel.org,
	linux@...ck-us.net
Cc: platform-driver-x86@...r.kernel.org,
	linux-hwmon@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Krishna Chomal <krishna.chomal108@...il.com>
Subject: [PATCH v2 0/2] platform/x86: hp-wmi: Add manual fan support for Victus S laptops

This series adds support for manual fan speed control and PWM reporting
for HP Victus S-style laptops.

The first patch refactors the hwmon implementation to use a per-device
private context for state tracking. It implements RPM-to-PWM conversion
using linear interpolation based on the laptop's internal fan tables
retrieved via WMI. It also introduces PWM_MODE_MANUAL, allowing users
to set specific fan speeds.

The second patch addresses a firmware-specific behavior where the
system reverts to "Auto" fan mode after a 120-second timeout if no WMI
fan commands are received. A delayed workqueue is implemented to act
as a keep-alive heartbeat, refreshing the fan state every 90 seconds
to ensure user-selected profiles remain active indefinitely.

Changes in v2:
- Refactored hp_wmi_apply_fan_settings() to use a 'ret' variable and use
  a common path to set fan settings and prepare for keep-alive logic.
- Replaced raw buffer casting with proper fan table structs.
- Converted RPM/PWM macros to static inline functions.
- Renamed internal context variable from 'ctx' to 'priv' for consistency.
- Renamed delay macro to KEEP_ALIVE_DELAY_SECS.
- Added missing headers and removed redundant NULL checks.

Tested on: HP Omen 16-wf1xxx (board ID 8C78)

Krishna Chomal (2):
  platform/x86: hp-wmi: add manual fan control for Victus S models
  platform/x86: hp-wmi: implement fan keep-alive

 drivers/platform/x86/hp/hp-wmi.c | 303 ++++++++++++++++++++++++++-----
 1 file changed, 258 insertions(+), 45 deletions(-)

-- 
2.52.0