RK3399之背光PWM： 背景 Platform：RK3399 OS：Android7.1.2 Kernel：v4.4.103 DTS配置 DTS backlight:backlight{ status="disabled"; compatible="pwm-backlight"; pwms=<&pwm00250000>; brightness-levels=< 01234567 89101112131415 1617181920212223 2425262728293031 3233343536373839 ...