[0/1] platform/x86/tuxedo: Add virtual LampArray for TUXEDO NB04

Message

Werner Sembach Sept. 26, 2024, 5:44 p.m. UTC

Hi,
took some time but now a first working draft of the suggested new way of
handling per-key RGB keyboard backlights is finished. See:
https://lore.kernel.org/all/[e-mail]/
First time for me sending a whole new driver to the LKML, so please excuse
mistakes I might have made.

Known bugs:
- The device has a lightbar which is currently not implemented and
  therefore stuck to blue once the first backlight control command is send.

What is still missing:
- The leds fallback
- Lightbar control

Some general noob questions:

Initially I though it would be nice to have 2 modules, one jsut being the
wmi initialization and utility stuff and one just being the backlight logic
stuff, being loaded automatically via module_alias, but that would still
require me to create the virtual hid device during the wmi_ab probe, and
that already needs the ll_driver, so i guess I have to do it statically
like i did now?
Or in other words: I would have liked to have a module dependency graph
like this:
    tuxedo_nb04_lamp_array depends on tuxedo_nb04_platform (combining *_wmi_init and *_wmi_utility)
but if i currently split it into modules i would get this:
    tuxedo_nb04_wmi_ab_init dpends on tuxedo_nb04_wmi_ab_lamp_array depends on tuxedo_nb04_wmi_utility

Currently after creating the virtual hdev in the wmi init probe function I
have to keep track of it and manually destroy it during the wmi init
remove. Can this be automated devm_kzalloc-style?

Kind regards,
Werner Sembach