1. 指令直接设置
cd /sys/devices/platform/backlight/backlight/backlight
echo 40 > brightness //设置亮度为40
cat brightness //查看当前设置的亮度
2. framework层配置
/frameworks/base/core/res/res/values/config.xml //position
config_screenBrightnessSettingMinimum
config_screenBrightnessSettingMaximum
config_screenBrightnessSettingDefault
3. framework层代码
frameworks\base\packages\SystemUI\src\com\android\systemui\settings\BrightnessDialog.java
packages/apps/Settings/res/xml/display_settings.xml
frameworks/base/packages/SystemUI/AndroidManifest.xml
ref: https://www.cnblogs.com/crushgirl/p/15474247.html
4. 驱动层代码和配置
drivers/video/backlight/pwm_bl.c
kernel/arch/arm64/boot/dts/rockchip/rk3399-evb-ind-mipi-CLCMSZ4900.dtsi
5. framework层动态调试
待补充
6. 通过hook方式动态修改代码避免重新编译系统
待补充
tempu_dongkai
tempp_dongkai_dongkai321
tempu_yinfeng
tempp_yinfeng_yinfeng321
tempu_labtest
tempp_labtest_labtest321
