Re: [PATCH 0/4] Mahua T14s Gen 7 eDP backlight via PMK8850 LPG

[Luke Macken]

Tested on a Lenovo ThinkPad T14s Gen 7 (22A7000VUS, BOE NE140WUM-N41 panel)
with linux-next next-20261015 plus this series: the backlight device
/sys/class/backlight/backlight is registered with max_brightness 4095 and
the brightness keys work.

Tested-by: Luke Macken <luke@xxxxxxxxxx>

Two observations: the panel's DPCD advertises PWM-pin brightness control
only (0x701 = 0x83, 0x702 = 0x95, no AUX_SET_CAP), and the firmware leaves
the PMK8850 PWM channel at 0xe800 enabled with GPIO5 in func3, so the LPG
path matches what the hardware is set up for.