[PATCH v4 0/2] hid-asus: asus-wmi: refactor Ally suspend/resume

[Luke Jones <luke@ljones.dev>]

This short series refactors the Ally suspend/resume functionality in the
asus-wmi driver along with adding support for ROG Ally MCU version checking.

The version checking is then used to toggle the use of older CSEE call hacks
that were initially used to combat Ally suspend/wake issues arising from the MCU
not clearing a particular flag on resume. ASUS have since corrected this
especially for Linux in newer firmware versions.

- hid-asus requests the MCU version and displays a warning if the version is
  older than the one that fixes the issue.
- hid-asus awill also toggle the CSEE hack off, and mcu_powersave to on if the
version is high enough.

*Note: In review it was requested by Mario that I try strsep() for parsing
the version. I did try this and a few variations but the result was much
more code due to having to check more edge cases due to the input being
raw bytes. In the end the cleaned up while loop proved more robust.

- Changelog:
  + V2: https://lore.kernel.org/platform-driver-x86/20250226010129.32043-1-luke@ljones.dev/T/#t
    - Adjust warning message to explicitly mention suspend issues
    - Use switch/case block to set min_version
      - Set min_version to 0 by default and toggle hacks off
  + V3
    - Remove noise (excess pr_info)
    - Use kstrtoint, not kstrtolong
    - Use __free(kfree) for allocated mem and drop goto + logging
    - Use print_hex_dump() to show failed data after pr_err in mcu_request_version()
    - Use pr_debug in set_ally_mcu_hack() and set_ally_mcu_powersave() plus
      correct the message.
  + V4
    - Change use_ally_mcu_hack var to enum to track init state and
      prevent a race condition

Luke D. Jones (2):
  hid-asus: check ROG Ally MCU version and warn
  platform/x86: asus-wmi: Refactor Ally suspend/resume

 drivers/hid/hid-asus.c                     | 111 ++++++++++++++++-
 drivers/platform/x86/asus-wmi.c            | 133 +++++++++++++++------
 include/linux/platform_data/x86/asus-wmi.h |  19 +++
 3 files changed, 222 insertions(+), 41 deletions(-)

-- 
2.49.0