[I2S Problems with Respeaker MIC2 Hat on Banana PI Zero M2]

I found the Problem.

The Banana Pi M2 Zero claims to be Pin compatible to a Raspberry Pi 3 but it is not.

The RPI 3 (and Zero) have I2S_CLK and LRCLK on Pins 12 and 35 of the GPIO Header and the BPI has them on Pin 28 and 27.

I throw it in the bin and try to find another board that is compatible (RPIs are unobtainable at the moment)

[I2S Problems with Respeaker MIC2 Hat on Banana PI Zero M2]

From this very helpful thread:

 

I learned that I2S0 is disabled in the Banapi Zero M2 by default.

I enabled it in my overlay using

fragment@0 {
                target-path = "/soc/i2s@1c22000";
                __overlay__ {
                        status = "okay";
                };
        };

 

and with this dts:

Spoiler

// Definitions for G-Dis DAC
/dts-v1/;
/plugin/;

/ {
        compatible = "allwinner,sun8i-h3";

        fragment@0 {
                target-path = "/soc/i2s@1c22000";
                __overlay__ {
                        status = "okay";
                };
        };

        fragment@1 {
                target = <&i2c0>;
                __overlay__ {
                        #address-cells = <0>;
                        #size-cells = <0>;
                        status = "okay";

                        wm8960: wm8960{
                                compatible = "wlf,wm8960";
                                reg = <0x1a>;
                                wlf,shared-lrclk;
                                #sound-dai-cells = <0>;
                        };
                };
        };

        fragment@2 {
                target-path="/";
                __overlay__ {
                        wm8960_mclk: wm8960_mclk {
                        compatible = "fixed-clock";
                        #clock-cells = <0>;
                        clock-frequency = <12288000>;
                        };
                };
        };

        fragment@3 {
                target = <&i2s0>;
                __overlay__ {
                        pinctrl-0 = <&i2s0_pins>;
                        pinctrl-names = "default";
                        sound-dai = <&wm8960>;
                        status = "okay";
                };
        };

        fragment@4 {
                target-path = "/";
                __overlay__ {
                        sound_i2s {
                                simple-audio-card,name = "2MicHAT";
                                compatible = "simple-audio-card";
                                simple-audio-card,format = "i2s";
                                status = "okay";
                                simple-audio-card,bitclock-slave = <&dailink0_slave>;
                                simple-audio-card,frame-slave = <&dailink0_slave>;
//                              simple-audio-card,mclk-fs = <512>;
                                 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>;
                                };

                                dailink0_slave: simple-audio-card,codec {
                                        sound-dai = <&wm8960>;

                                       clocks = <&wm8960_mclk>;
                                        clock-names = "mclk";
                                };
                        };
                };
        };

};

 

i now have the sound interface!

daniel@bananapim2zero:~$ aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: D2MicHAT [2MicHAT], device 0: 1c22000.i2s-wm8960-hifi wm8960-hifi-0 [1c22000.i2s-wm8960-hifi wm8960-hifi-0]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: sun9ihdmi [sun9i-hdmi], device 0: SUN9I-HDMI PCM i2s-hifi-0 [SUN9I-HDMI PCM i2s-hifi-0]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

 

and also some kernel error messages:

[   53.784092] wm8960 0-001a: failed to configure clock
[   53.784107] wm8960 0-001a: ASoC: error at snd_soc_dai_hw_params on wm8960-hifi: -22
[   53.784124]  1c22000.i2s-wm8960-hifi: ASoC: soc_pcm_hw_params() failed (-22)
<goes on very long>

 

So now it seems there is something wrong with the clocking.

Probably i did not configure the I2S correctly to take MCLK from the HAT but at the moment i got no idea

 

[I2S Problems with Respeaker MIC2 Hat on Banana PI Zero M2]

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