PineTab-V Experiences

[elizabethtaylor]

On brightness: if /sys/class/backlight/backlight/brightness changes but the panel doesn't, the PWM may be wired to a different channel, or the DSI panel may expect brightness via its own controller rather than the generic PWM driver. Check dmesg for pwm-backlight registration and compare the DTS pwm-backlight node against the PineTab-V DTS/schematic. The missing Goodix firmware is likely unrelated to display brightness—it's the touch controller.