Add support for Legion 5 15IRX10 (83LY, BIOS QNCN)

[udda]

Summary

This PR adds support for Lenovo Legion 5 15IRX10 systems using QNCN firmware.

Changes

• Added support for BIOS family QNCN in the kernel module configuration
• Added the corresponding allowlist/DMI matching so the module loads normally on this model (without force=1)
• Updated README with notes about a possible platform profile conflict with Lenovo WMI Gamezone

Tested on

• Model: Lenovo Legion 5 15IRX10
• CPU: Intel Core i9-14900HX
• GPU: NVIDIA GeForce RTX 5070 Max-Q / Mobile
• DMI product name: 83LY
• BIOS: QNCN28WW
• Kernel: 6.19.9-1-default
• EC Chip ID: 0x5508
• EC Chip Version: 0x2b0

Validation results

• Module probes and loads normally for the device (is_allowed: 1, config QNCN selected)
• hwmon/sysfs interfaces are available and functional
• Fan RPM and temperatures report coherently with the selected access method
• Power mode switching works (including platform profile integration)

Note about platform profile providers

On this machine, legion_laptop can coexist with lenovo_wmi_gamezone, but both may register platform profile handlers with different profile sets.
This may cause user-space issues (for example KDE power-saver errors or missing low-power transitions).

The README documents the workaround: blacklist lenovo_wmi_gamezone when using legion_laptop as the primary platform profile provider.

[vassalloevan-hub]

The newer BIOS revision works.

Details:
Model and Debug Info

• Installation type: DKMS + force=1 (via make forcereloadmodule)
• Distribution: Nobara Linux (Fedora-based) KDE
• Model name: Lenovo Legion 5 15IRX10
• Product Name (DMI): 83LY
• SKU: LENOVO_MT_83LY_BU_idea_FM_Legion 5 15IRX10
• BIOS Version: QNCN36WW
• BIOS Release Date: 01/19/2026
• CPU model: Intel Core i9-14900HX
• GPU model: NVIDIA RTX 5070

Output of sudo dmidecode -t system (serial/UUID removed):
Manufacturer: LENOVO
Product Name: 83LY
Version: Legion 5 15IRX10
SKU Number: LENOVO_MT_83LY_BU_idea_FM_Legion 5 15IRX10
Family: Legion 5 15IRX10

EC Chip ID: 5508
EC Chip Version: 2b0
Features confirmed working with force=1:

• fancurve
• powermode
• platformprofile
• platformprofilenotify
• minifancurve
• fancurve_pwm_speed
• fancurve_rpm_speed

Notes:

• Fan speed EC access working (EC method returns values,
  WMI3 returns correct ~1800 RPM at idle)
• GPU temperature confirmed via EC: 87°C under load
• CPU temperature confirmed via EC: 65°C
• Fan curve via WMI has 10 points (all zeroed,
  likely needs model-specific config)
• ACPI CFG error: -5 (ACPI method not supported on this model)
• powermode via WMI working (current mode: 2)
• has_custom_powermode: true
• EC lockfancontroller: false

Requesting official allowlist entry for BIOS QNCN36WW
(QNCN36WW appears to be a newer BIOS revision than
what may already be in the PR for this model).