[PATCH AUTOSEL 6.17] platform/x86: hp-wmi: Add Omen 16-wf1xxx fan support

[Sasha Levin <sashal@kernel.org>]

From: Krishna Chomal <krishna.chomal108@gmail.com>

[ Upstream commit fb146a38cb119c8d69633851c7a2ce2c8d34861a ]

The newer HP Omen laptops, such as Omen 16-wf1xxx, use the same
WMI-based thermal profile interface as Victus 16-r1000 and 16-s1000
models.

Add the DMI board name "8C78" to the victus_s_thermal_profile_boards
list to enable proper fan and thermal mode control.

Tested on: HP Omen 16-wf1xxx (board 8C78)
Result:
* Fan RPMs are readable
* echo 0 | sudo tee /sys/devices/platform/hp-wmi/hwmon/*/pwm1_enable
  allows the fans to run on max RPM.

Signed-off-by: Krishna Chomal <krishna.chomal108@gmail.com>
Link: https://patch.msgid.link/20251018111001.56625-1-krishna.chomal108@gmail.com
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---

LLM Generated explanations, may be completely bogus:

1. **Commit Message Analysis**:
   - **Subject**: "platform/x86: hp-wmi: Add Omen 16-wf1xxx fan support"
   - **Problem**: HP Omen 16-wf1xxx laptops (board ID "8C78") lack fan
     and thermal profile control.
   - **Fix**: Adds the board ID to the driver's whitelist
     (`victus_s_thermal_profile_boards`), enabling the existing WMI
     thermal interface for this model.
   - **Signals**: Tested on hardware (positive), Reviewed by maintainer
     (positive). No "Fixes:" tag, but fixes a hardware support gap.

2. **Deep Code Research**:
   - **File**: `drivers/platform/x86/hp/hp-wmi.c`
   - **Mechanism**: The driver uses
     `dmi_get_system_info(DMI_BOARD_NAME)` to match against
     `victus_s_thermal_profile_boards`. If matched,
     `is_victus_s_thermal_profile()` returns true, enabling
     `hp_wmi_hwmon_read`/`write` callbacks to handle fan speed and
     thermal profiles via the EC.
   - **Codebase Context**: The `victus_s` infrastructure was introduced
     in commit `6e4ab59b8391a` (Jan 2025) and is present in the current
     stable tree (linux-6.17.y).
   - **Precedent**: Commit `748f897511446` (Jul 2025) previously added
     board IDs "8C99" and "8C9C" to the same array and was
     backported/present in the stable tree.
   - **Backport Detail**: The patch context shows IDs ("8BBE", "8BD4")
     that are missing from the current stable tree. This indicates the
     patch will not apply cleanly (`git apply` will fail on context),
     but the logic is independent. A trivial backport (manual context
     adjustment) is required to insert "8C78" into the existing array.

3. **Stable Kernel Rules Compliance**:
   - **Exception Category**: **New Device IDs** (Explicitly allowed).
     The stable rules permit adding PCI/USB/ACPI IDs to existing drivers
     to enable hardware support. Adding a DMI board string functions
     identically to adding a Device ID.
   - **User Impact**: High for owners of this hardware (fixes broken
     thermal management). Low for everyone else.
   - **Risk**: Negligible. The change is isolated to a specific hardware
     signature.
   - **Criteria**: obviously correct (adding string to array), fixes
     real bug (missing functionality), small scope (1 line).

4. **Conclusion**:
  The commit effectively acts as a Device ID / Quirk addition, which is
  a standard exception for stable backports. It enables essential
  hardware functionality using existing, tested driver paths. The
  missing context in the stable tree is a minor logistical issue
  (requires fuzz/manual merge) but does not invalidate the technical
  correctness or safety of the fix.

**YES**

 drivers/platform/x86/hp/hp-wmi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/platform/x86/hp/hp-wmi.c b/drivers/platform/x86/hp/hp-wmi.c
index 9a668e2587952..e10c75d91f248 100644
--- a/drivers/platform/x86/hp/hp-wmi.c
+++ b/drivers/platform/x86/hp/hp-wmi.c
@@ -95,7 +95,7 @@ static const char * const victus_thermal_profile_boards[] = {
 /* DMI Board names of Victus 16-r and Victus 16-s laptops */
 static const char * const victus_s_thermal_profile_boards[] = {
 	"8BBE", "8BD4", "8BD5",
-	"8C99", "8C9C"
+	"8C78", "8C99", "8C9C",
 };
 
 enum hp_wmi_radio {
-- 
2.51.0