joe38

Hello,
 
Solution to run a pcm5102a module on a BPi M2 Zero board (Allwinner H2+/H3).
 
Becarfull , the connection is different compared to the GPIO 40 of the Raspberry !
 
Wiring of the DAC on GPIO40 of the BPi M2 Zero:
 
SCLK (not connected)
BCK on CON2-P27 (PA19-EINT19)
LCK on CON2-P28 (PA18-EINT18)
DIN on CON2-P40 (PA20-EINT20)
VIN (5v) on CON2-P02 or CON2-P04
GND on CON2-P06
 
Image linux Armbian used :

Armbian_22.11.0-trunk_Bananapim2zero_bullseye_edge_6.0.9.img

Enabled i2s via overlay :
 
 
Create a file sun8i-h3-I2S-out.dts containing the text of the discussion indicated above /boot/overlay-user
The contents of sun8i-h3-I2S-out.dts should look like:
 
/dts-v1/;
/plugin/;
/ {
    compatible = "allwinner,sun8i-h3";
    fragment@0 {
        target-path = "/soc/i2s@1c22000";
        __overlay__ {
            status = "okay";
        };
    };
    fragment@1 { 
        target-path = "/"; 
        __overlay__ { 
            pcm5102a: pcm5102a {
                #sound-dai-cells = <0>;
                compatible = "ti,pcm5102a";
                pcm510x,format = "i2s";
            };
        };
     };
    fragment@2 {
        target = <&i2s0>;
        __overlay__ {
            status = "okay";
            pinctrl-0 = <&i2s0_pins>;
            sound-dai = <&pcm5102a>;
            pinctrl-names = "default";
        };
    };
    fragment@3 {
        target-path = "/";
        __overlay__ {
            sound_i2s {
                compatible = "simple-audio-card";
                simple-audio-card,name = "I2S-master";
                simple-audio-card,mclk-fs = <256>;
                simple-audio-card,format = "i2s";
                status = "okay";
                simple-audio-card,cpu {
                    sound-dai = <&i2s0>;
                };
                simple-audio-card,codec {
                    sound-dai = <&pcm5102a>;
                };
            };
        };
    };
};
 
Launch the command :
armbian-add-overlay ./sun8i-h3-I2S-out.dts

The sun8i-h3-I2S-out.dtbo file is created
The /boot/armbianEnv.txt file is modified, now you should find the line "user_overlays=sun8i-h3-I2S-out"

reboot BPi M2 Zero
 
The aplay -l command verifies the presence of the pcm5102a DAC.

aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: I2Smaster [I2S-master], device 0: 1c22000.i2s-pcm5102a-hifi pcm5102a-hifi-0 [1c22000.i2s-pcm5102a-hifi pcm5102a-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
 
Thanks to everyone who writes in the forums otherwise I wouldn't have been able to get the whole thing working.
For information, works very well with Logitech Media Server and the Squeezlite player (and certainly others but I haven't tried).