[Bug 222044] hp-wmi: Mute and mic-mute LEDs not supported on HP Laptop 15-fc0xxx (board 8DC9)

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=222044

--- Comment #10 from Piyush (neonblade018@proton.me) ---
Adding the exact hardware IDs and technical details from the build:

- Target Machine: HP Laptop 15-fc0xxx (AMD Ryzen 5 7520U / Mendocino)
- Codec: Realtek ALC236
- Subsystem ID: 0x103c8dc9

Regarding the fixup chain details:
In the source tree, `ALC236_FIXUP_HP_DMIC` was already chained downstream (to
`ALC269_FIXUP_THINKPAD_ACPI`). Simply replacing `.chain_id` with
`ALC236_FIXUP_HP_MUTE_LED_MICMUTE_GPIO` directly inside `ALC236_FIXUP_HP_DMIC`
broke that existing downstream connection.

To prevent any conflict and keep everything intact:
We linked them sequentially so `ALC236_FIXUP_HP_DMIC` chains to
`ALC236_FIXUP_HP_MUTE_LED_MICMUTE_GPIO`, which then preserves the rest of the
downstream path (`ALC269_FIXUP_THINKPAD_ACPI`).

This ensures:
1. The DMIC pin configuration (`0x12 -> 0x90a60160`) is retained.
2. The speaker mute COEF (index 0x20) and GPIO 0 mic-mute LED handlers are
pulled in cleanly.

Verification results on kernel 7.2.9:
- `/sys/class/leds/hda::mute` and `hda::micmute` registered immediately under
sysfs.
- Native kernel triggers `[audio-mute]` and `[audio-micmute]` attached
automatically without requiring any background scripts or hda-verb polling.
- Both physical orange LEDs switch in real time with audio state toggles.
- Digital mic array works properly via the AMD ACP6x driver.

Subsystem ID `0x103c8dc9` is fully verified and ready for an upstream patch
entry.

-- 
You may reply to this email to add a comment.

You are receiving this mail because:
You are watching the assignee of the bug.