(LE11) Odroid C2 HiFi Shield Plus

I've added the driver to this image: https://chewitt.libreelec.tv/testing/LibreE…h64-11.80.0.tar

I suspect the driver is only part of the puzzle though. I believe there are device-tree overlay and perhaps mixer changes too. One step at a time though.

EDIT: forgot to sync the image .. Give it 10 mins before downloading.

Nope, official updates are normally done using .tar files as those are faster to unpack/update from. The .img.gz also works but needs an extra step. Both have identical KERNEL/SYSTEM and .dtb files inside.

I did a little research on the HK forum and we need to construct a new device-tree overlay that adds nodes for the pcm5102 chip and audio card routing. Update to this file (again, it's been updated):

https://chewitt.libreelec.tv/testing/LibreELEC-AMLGX.aarch64-11.80.0.tar

Then run the following from the SSH console:

mount -o remount,rw /flash
cp /usr/share/bootloader/meson-gxbb-odroidc2-hifishield.dtb /flash/
sed -i 's/meson-gxbb-odroidc2/meson-gxbb-odroidc2-hifishield/g' /flash/extlinux.conf
mount -o remount,ro /flash
rebooot

This should switch u-boot over to the hifishield device-tree file, and then we discover how accurate my blind guesswork was?

Please share URLs from "dmesg | paste" and "aplay -l | paste" and "aplay -L | paste" so we can see if anything happened.

To be clear, I'm not expecting audio output in Kodi yet, as I suspect audio mixer routing changes are required too.

mount -o remount,rw /flash
cp /usr/share/bootloader/meson-gxbb-odroidc2-hifishield.dtb /flash/
sed -i 's/meson-gxbb-odroidc2/meson-gxbb-odroidc2-hifishield/g' /flash/extlinux/extlinux.conf
mount -o remount,ro /flash
rebooot

^ repeat, we moved extlinux to a directory at some point.

Hello,
a big thank you for including the Odroid C2 in version LE11!
I also have the same issue regarding the HiFi Shield Plus module, which is not detected with LE11.
I've tried the commands without success. I'm available to conduct further tests.
Thanks for the assistance. Have a great day.

The result :

https://paste.libreelec.tv/harmless-turtle.log

**** List of PLAYBACK Hardware Devices ****
card 0: ODROIDC2 [ODROID-C2], device 0: fe.dai-link-0 (*) []
Subdevices: 1/1
Subdevice #0: subdevice #0

null
Discard all samples (playback) or generate zero samples (capture)
default:CARD=ODROIDC2
ODROID-C2,
Default Audio Device
sysdefault:CARD=ODROIDC2
ODROID-C2,
Default Audio Device
hdmi:CARD=ODROIDC2,DEV=0
ODROID-C2,
HDMI Audio Output

I rather doubt that I'll figure this out without access to hardware for local testing and tinkering. If you spot a hifi-shield card or even a complete C2 with one included for sale somewhere let me know.

I did reach out to HK but got their standard-ish "oh this is no longer sold.." response which basically means they no longer care for support (outside of their legacy kernels) and as usual support is entirely up to the community.

I was looking into a bit similar problem. As stated above, the magic is the device tree (overlay). It is required to get the pin routing right, here the newer kernels and dts need to work together properly. For getting e.g. SPDIF output to work, I had to modify the device tree file to actually enable it (creating packages/linux/patches/default/linux-080-odroid-c2.patch):

--- a/arch/arm64/boot/dts/amlogic/meson-gxbb-odroidc2-unpatched.dts    2023-11-05 01:19:49.197991036 +0100
+++ b/arch/arm64/boot/dts/amlogic/meson-gxbb-odroidc2.dts    2023-11-05 01:29:18.041481346 +0100
@@ -174,6 +174,13 @@
        };
    };

+    spdif_dit: audio-codec-0 {
+        #sound-dai-cells = <0>;
+        compatible = "linux,spdif-dit";
+        status = "okay";
+        sound-name-prefix = "DIT";
+    };
+
    sound {
        compatible = "amlogic,gx-sound-card";
        model = "ODROID-C2";
@@ -184,33 +191,46 @@
        assigned-clock-rates = <294912000>,
                       <270950400>,
                       <393216000>;
-
        dai-link-0 {
-            sound-dai = <&aiu AIU_CPU CPU_I2S_FIFO>;
-        };
+                        sound-dai = <&aiu AIU_CPU CPU_I2S_FIFO>;
+                };

-        dai-link-1 {
-            sound-dai = <&aiu AIU_CPU CPU_I2S_ENCODER>;
-            dai-format = "i2s";
-            mclk-fs = <256>;
-
-            codec-0 {
-                sound-dai = <&aiu AIU_HDMI CTRL_I2S>;
-            };
-        };
-
-        dai-link-2 {
-            sound-dai = <&aiu AIU_HDMI CTRL_OUT>;
-
-            codec-0 {
-                sound-dai = <&hdmi_tx>;
-            };
-        };
+                dai-link-1 {
+                        sound-dai = <&aiu AIU_CPU CPU_SPDIF_FIFO>;
+                };
+
+                dai-link-2 {
+                        sound-dai = <&aiu AIU_CPU CPU_I2S_ENCODER>;
+                        dai-format = "i2s";
+                        mclk-fs = <256>;
+
+                        codec-0 {
+                                sound-dai = <&aiu AIU_HDMI CTRL_I2S>;
+                        };
+                };
+
+                dai-link-3 {
+                        sound-dai = <&aiu AIU_CPU CPU_SPDIF_ENCODER>;
+
+                        codec-0 {
+                                sound-dai = <&spdif_dit>;
+                        };
+                };
+
+                dai-link-4 {
+                        sound-dai = <&aiu AIU_HDMI CTRL_OUT>;
+
+                        codec-0 {
+                                sound-dai = <&hdmi_tx>;
+                        };
+                };
    };
};

&aiu {
    status = "okay";
+    pinctrl-0 = <&spdif_out_ao_6_pins &i2s_am_clk_pins &i2s_out_ao_clk_pins &i2s_out_lr_clk_pins &i2s_out_ch01_ao_pins>;
+    pinctrl-names = "default";
};

&cec_AO {
@@ -278,8 +299,8 @@
&gpio_ao {
    gpio-line-names = "UART TX", "UART RX", "VCCK En", "TF 3V3/1V8 En",
              "USB HUB nRESET", "USB OTG Power En",
-              "J7 Header Pin2", "IR In", "J7 Header Pin4",
-              "J7 Header Pin6", "J7 Header Pin5", "J7 Header Pin7",
+              "SPDIF_OUTPUT", "IR In", "I2S_MCLK",
+              "I2S_SCLK", "I2S_LRCLK", "I2S_DATA_OUTPUT",
              "HDMI CEC", "SYS LED",
              /* GPIO_TEST_N */
              "";

That worked for me a couple of month ago, unfortunately I fried my C2 board and thus being unable to test it again. Hope this find someone helpful though ...

nicomaniaque I've updated the meson-gxbb-odroidc2-hifishield.dtb included in my test images with the content that ds000 shared so give it a test and please report back whether it works or not? https://chewitt.libreelec.tv/testing/

Quote from chewitt

I rather doubt that I'll figure this out without access to hardware for local testing and tinkering. If you spot a hifi-shield card or even a complete C2 with one included for sale somewhere let me know.

Quote from chewitt

I did reach out to HK but got their standard-ish "oh this is no longer sold.." response which basically means they no longer care for support (outside of their legacy kernels) and as usual support is entirely up to the community.

Hi chewitt,

I created an account just to ask you if you are still interested in a HiFi-Shield2 card?

I have an Odroid C2 at home that I was able to revive with the help of LibreELEC. As I am now using a SMSL AO-300 through USB, I have a spare HiFi-Shield2 card that you might use to add support in LE.

Would you be interested?

Thank you again for all your hard work and saving electronics from e-waste!