[QUESTION] (Resent) HID: Lenovo Essential Gen2 Fnlock patch (1a81:1026)

[QUESTION] (Resent) HID: Lenovo Essential Gen2 Fnlock patch (1a81:1026)

[Annmay Arora]

Resending with corrected recipient headers (previous mail missed LKML).

Hi,

I am working on:
    (lsusb output)> 1a81:1026 Holtek Semiconductor, Inc. Lenovo
    Essential Wireless Combo Keyboard & Mouse Gen2

to bring the F-Keys functionality to parity as under Windows. The
peripheral was observed with Wireshark (4.6.5) and USBpcap on a windows
11 LTSC install. The SET_REPORT to unlock proper functionality from F-keys
is as follows:

  ON  -> 06 ce 01 01 00 00 00 00
  OFF -> 06 ce 00 01 00 00 00 00

where the ON state allows the user to interact with media keys (Eg. Fn +
F1 allows us to toggle mute).

This was tested successfully  with a python script to enable the Fnlock
and later with a out-of-kernel module which is not production ready and
would ideally not be upstreamed. I have a few questions in order to
attempt to send a few patches. 

Questions:
1) The device presents itself to be Holtek, but does not seem to match
the manufacturer code. Would another id need to be added to
drivers/hid/hid-ids.h

2) Would it be ideal to create a hid-holtek-lenovo.c or should one of
the existing drivers should be modified? If yes, which one?


TIA,

Annmay Arora