WSL2-Linux-Kernel/sound/soc/generic/audio-graph-card2-custom-sample.dtsi

// SPDX-License-Identifier: GPL-2.0
/*
 * audio-graph-card2-custom-sample.dtsi
 *
 * Copyright (C) 2020 Renesas Electronics Corp.
 * Copyright (C) 2020 Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
 *
 * This sample indicates how to use audio-graph-card2 and its
 * custom driver. "audio-graph-card2-custom-sample" is the custome driver
 * which is using audio-graph-card2.
 *
 * You can easily use this sample by adding below line on your DT file,
 * and add new CONFIG to your .config.
 *
 *	#include "../../../../../sound/soc/generic/audio-graph-card2-custom-sample.dtsi"
 *
 *	CONFIG_SND_AUDIO_GRAPH_CARD2
 *	CONFIG_SND_AUDIO_GRAPH_CARD2_CUSTOM_SAMPLE
 *	CONFIG_SND_TEST_COMPONENT
 */
/ {
	/*
	 * @ : used at links
	 *
	 * [Normal]
	 *	cpu0 <-@-----------------> codec0
	 *
	 * [Multi-CPU/Codec]
	 *		+-+		+-+
	 *	cpu1 <--| |<-@--------->| |-> codec1
	 *	cpu2 <--| |		| |-> codec2
	 *		+-+		+-+
	 */
	audio-graph-card2-custom-sample {
		/*
		 * You can use audio-graph-card2 directly by using
		 *
		 * compatible = "audio-graph-card2";
		 */
		compatible = "audio-graph-card2-custom-sample";

		links = <&cpu0			/* normal: cpu side only */
			 &mcpu0			/* multi:  cpu side only */
		>;

		multi {
			ports@0 {
			mcpu0:	port@0 { mcpu0_ep: endpoint { remote-endpoint = <&mcodec0_ep>; }; };
				port@1 { mcpu1_ep: endpoint { remote-endpoint = <&cpu1_ep>;    }; };
				port@2 { mcpu2_ep: endpoint { remote-endpoint = <&cpu2_ep>;    }; };
			};
			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 {
		/*
		 * update compatible to indicate more detail behaviour
		 * if you want. see test-compatible for more detail.
		 *
		 * ex)
		 *	- compatible = "test-cpu";
		 *	+ compatible = "test-cpu-verbose";
		 */
		compatible = "test-cpu";
		ports {
			bitclock-master;
			frame-master;
			cpu0: port@0 { cpu0_ep: endpoint { remote-endpoint = <&codec0_ep>; }; };
			      port@1 { cpu1_ep: endpoint { remote-endpoint = <&mcpu1_ep>; }; };
			      port@2 { cpu2_ep: endpoint { remote-endpoint = <&mcpu2_ep>; }; };
		};
	};

	test_codec {
		/*
		 * update compatible to indicate more detail behaviour
		 * if you want. see test-compatible for more detail.
		 *
		 * ex)
		 *	- compatible = "test-codec";
		 *	+ compatible = "test-codec-verbose";
		 */
		compatible = "test-codec";
		ports {
			port@0  { codec0_ep:  endpoint { remote-endpoint = <&cpu0_ep>; }; };
			port@1  { codec1_ep:  endpoint { remote-endpoint = <&mcodec1_ep>; }; };
			port@2  { codec2_ep:  endpoint { remote-endpoint = <&mcodec2_ep>; }; };
		};
	};
};