Inverted backlight PWM on HP 14-r206nv
HP 14-r206nv's backlight brightness decreases as the brightness value increases and vice versa.
I manually adjusted the backlight via /sys/class/backlight/intel_backlight/brightness and that interface exhibited the same behavior. When the brightness value is 0 or 7812 (max_brightness) the screen darkens completely. This doesn't happen when quick_invert_brightness is applied.
As requested in https://lists.freedesktop.org/archives/intel-gfx/2023-February/317865.html the following debug information is provided.
Tested on drm-tip commit 9fcffc218abe16fc5fbfca231fda6a7218661eb6:
Linux notebook 6.2.0-rc6 #2 SMP PREEMPT_DYNAMIC Fri Feb 3 11:17:21 EET 2023 x86_64 x86_64 x86_64 GNU/Linux