Can’t figure out how to enable SPDIF on NanoPi NEO3. rk3328-nanopi-neo3-rev02.dtb sources contain SPDIF

 

        sound-spdif {
                compatible = "simple-audio-card";
                simple-audio-card,name = "SPDIF";
                simple-audio-card,cpu {
                        sound-dai = <&spdif>;
                };
                simple-audio-card,codec {
                        sound-dai = <&spdif_out>;
                };
        };

        spdif_out: spdif-out {
                compatible = "linux,spdif-dit";
                #sound-dai-cells = <0>;
        };
............

&spdif {
    status = "okay";
    pinctrl-0 = <&spdifm0_tx>;
};

 

Kernel module loaded too

 

root@neo3:~# lsmod |grep spdif
snd_soc_rockchip_spdif    16384  0
snd_soc_core          278528  5 snd_soc_pcm5102a,snd_soc_rockchip_spdif,snd_soc_simple_card_utils,snd_soc_rockchip_i2s,snd_soc_simple_card

 

But I don’t see the sound interface

 

root@neo3:~# aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: Pro [DX3 Pro], device 0: USB Audio [USB Audio]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 2: Out [I2S Out], device 0: ff010000.i2s-pcm5102a-hifi pcm5102a-hifi-0 [ff010000.i2s-pcm5102a-hifi pcm5102a-hifi-0]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

 

SPDIF may be enabled by simple overlay file with this content:

/dts-v1/;
/plugin/;

/ {
    compatible = "friendlyelec,nanopi-neo3", "rockchip,rk3328";

    fragment@0 {
        target = <&spdif_out>;
        __overlay__ {
        status = "okay";
        };
    };
};

compile and install:

sudo armbian-add-overlay spdif-out-enable.dts

reboot and check:

nik@nanopineo3:~$ aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: I2S [I2S], device 0: ff010000.i2s-pcm5102a-hifi pcm5102a-hifi-0 [ff010000.i2s-pcm5102a-hifi pcm5102a-hifi-0]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: SPDIF [SPDIF], device 0: ff030000.spdif-dit-hifi dit-hifi-0 [ff030000.spdif-dit-hifi dit-hifi-0]
  Subdevices: 1/1
  Subdevice #0: subdevice #0