Hi,
i am trying to get the Respeaker 2 Mic Pi hat working on a Banana Pi Zero M2. The HAT uses the WM8960 codec and generates its own I2S MCLK.
After some trouble i got the i2c interface working and i2cdetect shows a device at address 0x1a which is correct.
But i can not get the I2S interface working.
I have added a user overlay with the following .dts:
/dts-v1/;
/plugin/;
/ {
compatible = "allwinner,sun8i-h3";
fragment@0 {
target = <&i2c0>;
__overlay__ {
#address-cells = <0>;
#size-cells = <0>;
status = "okay";
wm8960: wm8960{
compatible = "wlf,wm8960";
reg = <0x1a>;
#sound-dai-cells = <0>;
};
};
};
fragment@1 {
target = <&i2s0>;
__overlay__ {
status = "okay";
pinctrl-0 = <&i2s0_pins>;
sound-dai = <&wm8960>;
pinctrl-names = "default";
};
};
fragment@2 {
target-path = "/";
__overlay__ {
sound_i2s {
compatible = "simple-audio-card";
simple-audio-card,name = "I2S-master";
simple-audio-card,format = "i2s";
simple-audio-card,bitclock-master = <&codec_dai>;
simple-audio-card,frame-master = <&codec_dai>;
simple-audio-card,mclk-fs = <256>;
status = "okay";
simple-audio-card,widgets =
"Microphone", "Mic Jack",
"Speaker", "Speaker",
"Headphone", "Headphone Jack";
simple-audio-card,routing =
"Headphone Jack", "HP_L",
"Headphone Jack", "HP_R",
"Speaker", "SPK_LP",
"Speaker", "SPK_LN",
"LINPUT1", "Mic Jack",
"LINPUT3", "Mic Jack",
"RINPUT1", "Mic Jack",
"RINPUT2", "Mic Jack";
simple-audio-card,cpu {
sound-dai = <&i2s0>;
};
codec_dai,codec {
sound-dai = <&wm8960>;
};
};
};
};
};
I do not see errors in dmesg but aplay -l only shows the HMDI sound interface.
I am stuck here and have not found a good explanation how .dts files exactly work for audio or how to get some error messgae from the kernel to see what is wrong.
Kernel Version is 5.15.62-sunxi
