Re: Query on audio-graph-card DT binding

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Hi Sameer

>               /-----> codec1 endpoint
>              /
>CPU endpoint \
>               \-----> codec2 endpoint

It sounds "Single CPU - Mult Codec" connection, and if my understanding
was correct, current ASoC is not supporting it so far.
But dummy CPU with Multi-CPU/Codec connection helps you ?
I'm not 100% sure though...
See
	${LINUX}/sound/soc/generic/audio-graph-card2-custom-sample.dtsi

DT looks like

	[Multi-CPU/Codec]
			 +-+		 +-+
		cpu   <--| |<-@--------->| |-> codec1
		dummy <--| |		 | |-> codec2
			 +-+		 +-+

Use Multi-CPU/Codec connection with dummy.

	audio-graph-card2 {
		compatible = "audio-graph-card2";
		links = <&mcpu>;

		multi {
			ports@0 {
			/* [Multi-CPU] */
			mcpu:	port@0 { mcpu0_ep: endpoint { remote-endpoint = <&mcodec0_ep>; }; };
				port@1 { mcpu1_ep: endpoint { remote-endpoint = <&cpu_ep>;     }; };
				port@2 { mcpu2_ep: endpoint { remote-endpoint = <&dummy_ep>;   }; };
			};

			/* [Multi-Codec] */
			ports@1 {
				port@0 { mcodec0_ep: endpoint { remote-endpoint = <&mcpu0_ep>;  }; };
				port@1 { mcodec1_ep: endpoint { remote-endpoint = <&codec1_ep>; }; };
				port@2 { mcodec2_ep: endpoint { remote-endpoint = <&codec2_ep>; }; };
			};
		};
	};

	test_cpu {
		compatible = "test-cpu";
		port { dummy_ep: endpoint { remote-endpoint = <&mcpu2_ep>; }; };
	};

Thank you for your help !!

Best regards
---
Renesas Electronics
Ph.D. Kuninori Morimoto





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