There's an issue with miqi device tree, no sound nodes are defined. The following part is missing in /arch/arm/boot/dts/rk3288-miqi.dts:
sound {
compatible = "simple-audio-card";
simple-audio-card,format = "i2s";
simple-audio-card,name = "DW-HDMI";
simple-audio-card,mclk-fs = <512>;
simple-audio-card,dai-link@0 { /* I2S - S/PDIF */
format = "i2s";
cpu {
sound-dai = <&i2s>;
};
codec {
sound-dai = <&hdmi>;
};
};
}
nitroshift