Hi Simon

> Using renesas_defconfig as a base I find that without enabling
> CONFIG_SND_SIMPLE_SCU_CARD the following are enabled:
> 
>    CONFIG_SND_AUDIO_GRAPH_CARD
>    CONFIG_SND_SIMPLE_CARD
> 
> But I see:
> 
> [   12.209793] ALSA device list:
> [   12.212799]   No soundcards found.
> 
> With CONFIG_SND_SIMPLE_SCU_CARD also enabled (in the defconfig) I see:
> 
> [   14.087191] ALSA device list:
> [   14.090195]   #0: rsnd-ak4613

Thanks.
56629fcba94c698d8c5be3413981506479566869
("arm64: dts: renesas: ebisu: Enable Audio")
is using "simple-scu-audio-card", but it should be "simple-audio-card".
Can you add and test this patch ?
CONFIG_SND_SIMPLE_SCU_CARD is no longer needed, I think.

--------------
diff --git a/arch/arm64/boot/dts/renesas/r8a77990-ebisu.dts 
b/arch/arm64/boot/dts/renesas/r8a77990-ebisu.dts
index 62bdddc..649d3fd 100644
--- a/arch/arm64/boot/dts/renesas/r8a77990-ebisu.dts
+++ b/arch/arm64/boot/dts/renesas/r8a77990-ebisu.dts
@@ -159,16 +159,13 @@
        };
 
        rsnd_ak4613: sound {
-               compatible = "simple-scu-audio-card";
+               compatible = "simple-audio-card";
 
                simple-audio-card,name = "rsnd-ak4613";
                simple-audio-card,format = "left_j";
                simple-audio-card,bitclock-master = <&sndcpu>;
                simple-audio-card,frame-master = <&sndcpu>;
 
-               simple-audio-card,prefix = "ak4613";
-               simple-audio-card,routing = "ak4613 Playback", "DAI0 Playback",
-               "DAI0 Capture", "ak4613 Capture";
                sndcpu: simple-audio-card,cpu {
                        sound-dai = <&rcar_sound>;
                };
--------------


Best regards
---
Kuninori Morimoto

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