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-Audio-Graph-SCU-Card:
-
-Audio-Graph-SCU-Card is "Audio-Graph-Card" + "ALSA DPCM".
-
-It is based on common bindings for device graphs.
-see ${LINUX}/Documentation/devicetree/bindings/graph.txt
-
-Basically, Audio-Graph-SCU-Card property is same as
-Simple-Card / Simple-SCU-Card / Audio-Graph-Card.
-see ${LINUX}/Documentation/devicetree/bindings/sound/simple-card.txt
- ${LINUX}/Documentation/devicetree/bindings/sound/simple-scu-card.txt
- ${LINUX}/Documentation/devicetree/bindings/sound/audio-graph-card.txt
-
-Below are same as Simple-Card / Audio-Graph-Card.
-
-- label
-- dai-format
-- frame-master
-- bitclock-master
-- bitclock-inversion
-- frame-inversion
-- dai-tdm-slot-num
-- dai-tdm-slot-width
-- clocks / system-clock-frequency
-
-Below are same as Simple-SCU-Card.
-
-- convert-rate
-- convert-channels
-- prefix
-- routing
-
-Required properties:
-
-- compatible : "audio-graph-scu-card";
-- dais : list of CPU DAI port{s}
-
-Example 1. Sampling Rate Conversion
-
- sound_card {
- compatible = "audio-graph-scu-card";
-
- label = "sound-card";
- prefix = "codec";
- routing = "codec Playback", "DAI0 Playback",
- "DAI0 Capture", "codec Capture";
- convert-rate = <48000>;
-
- dais = <&cpu_port>;
- };
-
- audio-codec {
- ...
-
- port {
- codec_endpoint: endpoint {
- remote-endpoint = <&cpu_endpoint>;
- };
- };
- };
-
- dai-controller {
- ...
- cpu_port: port {
- cpu_endpoint: endpoint {
- remote-endpoint = <&codec_endpoint>;
-
- dai-format = "left_j";
- ...
- };
- };
- };
-
-Example 2. 2 CPU 1 Codec (Mixing)
-
- sound_card {
- compatible = "audio-graph-scu-card";
-
- label = "sound-card";
- routing = "codec Playback", "DAI0 Playback",
- "codec Playback", "DAI1 Playback",
- "DAI0 Capture", "codec Capture";
-
- dais = <&cpu_port0
- &cpu_port1>;
- };
-
- audio-codec {
- ...
-
- audio-graph-card,prefix = "codec";
- audio-graph-card,convert-rate = <48000>;
- port {
- codec_endpoint0: endpoint {
- remote-endpoint = <&cpu_endpoint0>;
- };
- codec_endpoint1: endpoint {
- remote-endpoint = <&cpu_endpoint1>;
- };
- };
- };
-
- dai-controller {
- ...
- ports {
- cpu_port0: port {
- cpu_endpoint0: endpoint {
- remote-endpoint = <&codec_endpoint0>;
-
- dai-format = "left_j";
- ...
- };
- };
- cpu_port1: port {
- cpu_endpoint1: endpoint {
- remote-endpoint = <&codec_endpoint1>;
-
- dai-format = "left_j";
- ...
- };
- };
- };
- };