[PATCH 0/2] hp-wmi: Omen 16-b1xxx (8A13) support + per-fan pwm

[foobisdweik]

Hi all,

Two patches against drivers/platform/x86/hp/hp-wmi.c. They are
independent but both required to make fan control fully work on
HP OMEN 16-b1xxx laptops.

Patch 1 adds DMI board name 8A13 (OMEN by HP Laptop 16-b1xxx) to
the existing Omen thermal-profile and Victus-S DMI tables. The
firmware exposes the standard Omen PerformanceControl WMI feature
and uses the same legacy EC layout and GM2D/GM2E methods as its
sibling 8A44 (Omen 16-n0xxx). After this patch /sys/firmware/acpi/
platform_profile and the hp hwmon device come up correctly on 8A13.

Patch 2 promotes the per-driver pwm setpoint to a two-element
array so that hp-wmi exposes pwm1 (CPU fan) and pwm2 (GPU fan)
independently on Victus-S-capable boards. The underlying WMI
method (HPWMI_VICTUS_S_FAN_SPEED_SET_QUERY) already takes a
two-byte buffer and the EC honors per-fan setpoints; the driver
just hadn't been wired up that way. This is the standard hwmon
shape for multi-fan systems and makes fan-control tools such as
fancontrol and fan2go work out of the box.

Tested on a stock HP OMEN 16-b1xxx (BIOS F.23, 12th-gen i7-12700H,
RTX 3060) running 7.1-rc2 + these patches: platform_profile
toggles cool/balanced/performance, fan1_input/fan2_input read
independent tachs, and writing pwm1=60 + pwm2=200 simultaneously
drives CPU fan to ~1600 RPM and GPU fan to ~5700 RPM (verified
both via hwmon and direct read of EC offsets 0xB0..0xB3).

Evidence from dmesg:
[    0.000000] DMI: HP OMEN by HP Laptop 16-b1xxx/8A13, BIOS F.23 08/15/2025
[    7.643551] hp_wmi: Registered as platform profile handler

Evidence from sensors (manual control mode):
hp-isa-0000
Adapter: ISA adapter
fan1:        2700 RPM
fan2:        2800 RPM
pwm1:             62%  MANUAL CONTROL
pwm2:             64%  MANUAL CONTROL

foobisdweik (2):
  platform/x86: hp-wmi: Add support for Omen 16-b1xxx (8A13)
  platform/x86: hp-wmi: Expose independent CPU/GPU pwm channels

 drivers/platform/x86/hp/hp-wmi.c | 53 +++++++++++++++++++++++---------
 1 file changed, 38 insertions(+), 15 deletions(-)

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2.54.0