关键词：rk3399; rockchip,rk3399-hdmi-dp;
rk3399 — hdmi dp 声卡 dts配置
1、必需属性值设置：
- compatible: "rockchip,rk3399-hdmi-dp" - rockchip,cpu: 设置与codec连接的i2s通道； - rockchip,codec: 设置hdmi 和cdn_dp的音频声卡；
2、实例
sound {
compatible = "rockchip,rk3399-hdmi-dp";
rockchip,cpu = <&i2s2>;
rockchip,codec = <&hdmi>, <&cdn_dp>;
};