Cherry Trail DSI no or black Display

This issue's former title "LPSS PWM backlight control failure" was just my guess which part seemed responsible. X11/Xorg is affected as well as Wayland/wlroots.

Booting using systemd-boot the display stays black after the bootloader's menu.

Booting using kernel's efi-stub the display comes on until dpms backlight off, then stays off.

• CPU with IGP: Atom x7-Z8750 (Cherry Trail)
• System Architecture: x86_64
• Distribution: Arch Linux
• Machine: GPD Pocket 1
• Display Connector: DSI
• Backlight Control: pwm_lpss_platform
• Kernel Version: 5.18.9-arch1-1 (good)
• Kernel Version: 5.19.3.arch1-1 (bad)
• Kernel Version: 6.0rc1-1 miffe (bad)

dmesg_lpss_5.18.9.txt dmesg_lpss_6.0rc1.txt

Thanks for your work :)