[PATCH v2 0/2] platform/x86: oxpec: Report tablet mode on OneXPlayer detachables

[Alexander Egorov <begeebe@gmail.com>]

The OneXPlayer X1 family and Super X do not expose a firmware tablet-mode
switch. Add one based on their detachable pogo-pin keyboard devices.

I checked the EC alternative suggested in review. The Super X ACPI EC
operation region covers the complete 0x00-0xff register map. I captured 30
maps with the keyboard attached, 30 detached, and 30 reattached. There were
no stable attached-detached-reattached changes. The named ACPI fields KBFG
and SYSK did not change either. USB hotplug is therefore the only
attachment state exposed by this Super X firmware.

The X1 keyboard ID was taken from public hardware information. X1, X1 Pro,
and X1 Mini systems show the HAILUCK 258a:001e folio keyboard:

  https://wiki.archlinux.org/title/OnexPlayer_X1_A
  https://linux-hardware.org/?probe=517a6d5085
  https://linux-hardware.org/?probe=98267565ff
  https://linux-hardware.org/?probe=21f49ac935

The X1 family is included, but has not been tested by me because I only
have the Super X. G1 is deliberately deferred because of its different
keyboard layout.

Ilpo, comments on whether oxpec is the right home for this functionality are
welcome.

Changes in v2:
- add the requested Assisted-by trailer;
- split Super X from the shared G1 AMD board ID in a preceding patch;
- support the X1 and X1 Mini family using their folio keyboard ID;
- use driver globals and board switches instead of platform data and DMI;
- keep only the USB scan and notifier callbacks, with matching and reporting
  inlined;
- use generic keyboard vendor names and place the IDs beside their users;
- document the complete EC map comparison.

Alexander Egorov (2):
  platform/x86: oxpec: Distinguish OneXPlayer Super X board
  platform/x86: oxpec: Report tablet mode on OneXPlayer detachables

 drivers/platform/x86/Kconfig |   2 +
 drivers/platform/x86/oxpec.c | 116 ++++++++++++++++++++++++++++++++++-
 2 files changed, 117 insertions(+), 1 deletion(-)

-- 
2.55.0