VS-RK3399在android下面把声音放到最大时候，播放器自动退出问题
VS-RK3399 在android下面把声音放到最大时候，播放器自动退出问题。使用系统自带的Video.apk播放，当声音放到最大时候，播放视频过一会后自动退出，影响ADC采样，干扰了物理键，返回一个back键出来，刚好Video.apk有处理返回键的相应，导致播放时候退出。
修改方法：
\kernel\arch\arm64\boot\dts\rockchip\rk3399-android.dtsi
rk_key: rockchip-key {
compatible = "rockchip,key";
status = "okay";
io-channels = <&saradc 1>;
vol-up-key {
linux,code = <115>;
label = "volume up";
rockchip,adc_value = <1>;
};
vol-down-key {
linux,code = <114>;
label = "volume down";
rockchip,adc_value = <170>;
};
power-key {
gpios = <&gpio0 5 GPIO_ACTIVE_LOW>;
linux,code = <116>;
label = "power";
gpio-key,wakeup;
};
#if 0
menu-key {
linux,code = <59>;
label = "menu";
rockchip,adc_value = <746>;
};
home-key {
linux,code = <102>;
label = "home";
rockchip,adc_value = <355>;
};
back-key {
linux,code = <158>;
label = "back";
rockchip,adc_value = <560>;
};
camera-key {
linux,code = <212>;
label = "camera";
rockchip,adc_value = <450>;
};
#endif
};
按上面操作，把back键去掉
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