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https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
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d70be079c3
+-- ULCB -------------------+ |+--------+ +--------+| || SSI0| <---> |ak4613 || || SSI1| <---> | || || | +--------+| || | +--------+| || SSI2| <---> |HDMI || || | +--------+| || SSI3| <--+ | || SSI4| <-+| | |+--------+ || | +-------------||------------+ +-- Kingfisher -------------+ | || +--------+| | |+->|pcm3168a|| | +-->| || | +--------+| +---------------------------+ On UCLB/KF, we intuitively think we want to handle these as "2 Sound Cards": card0,0: 1st sound of ULCB (SSI0 - ak4613) card0,1: 2nd sound of ULCB (SSI2 - HDMI) card1,0: 1st sound of KF (SSI3 - pcm3168a) ^ ^ However, because of ASoC Component vs. Card framework limitations, we needed to handle this as "1 big Sound Card": card0,0: 1st sound of ULCB/KF (SSI0 - ak4613) card0,1: 2nd sound of ULCB/KF (SSI2 - HDMI) card0,2: 3rd sound of ULCB/KF (SSI3 - pcm3168a) ^ ^ Now ASoC supports multi Component, which allows us to handle "2 Sound Cards" such as "ULCB Sound Card" and "Kingfisher Sound Card", all ULCB/KF Audio dtsi can be updated. Note that this changes the Sound Card specification method from userland, especially for Kingfisher Sound. Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> Link: https://lore.kernel.org/r/87fs382yhk.wl-kuninori.morimoto.gx@renesas.com Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
91 lines
1.4 KiB
Plaintext
91 lines
1.4 KiB
Plaintext
// SPDX-License-Identifier: GPL-2.0
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/*
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* Device Tree for ULCB + Audio Graph Card
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*
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* Copyright (C) 2022 Renesas Electronics Corp.
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*/
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/*
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* (A) CPU0 <-----> ak4613
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* (B) CPU1 -----> HDMI
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*
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* (A) aplay -D plughw:0,0 xxx.wav
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* (B) aplay -D plughw:0,1 xxx.wav
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*
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* (A) arecord -D plughw:0,0 xxx.wav
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*/
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/ {
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sound_card: sound {
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compatible = "audio-graph-card";
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label = "snd-ulcb";
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dais = <&snd_ulcb1 /* (A) CPU0 <-> ak4613 */
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&snd_ulcb2 /* (B) CPU1 -> HDMI */
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>;
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};
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};
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&ak4613 {
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#sound-dai-cells = <0>;
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port {
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/*
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* (A) CPU0 <-> ak4613
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*/
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ak4613_endpoint: endpoint {
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remote-endpoint = <&rsnd_for_ak4613>;
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};
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};
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};
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&hdmi0 {
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ports {
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port@2 {
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/*
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* (B) CPU1 -> HDMI
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*/
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dw_hdmi0_snd_in: endpoint {
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remote-endpoint = <&rsnd_for_hdmi>;
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};
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};
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};
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};
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&rcar_sound {
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#address-cells = <1>;
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#size-cells = <0>;
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ports@0 {
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#address-cells = <1>;
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#size-cells = <0>;
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reg = <0>;
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snd_ulcb1: port@0 {
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/*
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* (A) CPU0 <-> ak4613
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*/
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reg = <0>;
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rsnd_for_ak4613: endpoint {
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remote-endpoint = <&ak4613_endpoint>;
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bitclock-master;
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frame-master;
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playback = <&ssi0>, <&src0>, <&dvc0>;
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capture = <&ssi1>, <&src1>, <&dvc1>;
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};
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};
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snd_ulcb2: port@1 {
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/*
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* (B) CPU1 -> HDMI
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*/
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reg = <1>;
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rsnd_for_hdmi: endpoint {
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remote-endpoint = <&dw_hdmi0_snd_in>;
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bitclock-master;
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frame-master;
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playback = <&ssi2>;
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};
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};
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};
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};
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