linux-kernel - [PATCH] arm64: dts: meson-sm1: add spdifin spdifout nodes

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Date:   Wed, 15 Dec 2021 11:02:36 +0800
From:   Artem Lapkin <email2tema@...il.com>
To:     narmstrong@...libre.com
Cc:     jbrunet@...libre.com, linux-arm-kernel@...ts.infradead.org,
        linux-amlogic@...ts.infradead.org, linux-kernel@...r.kernel.org,
        christianshewitt@...il.com, art@...das.com, nick@...das.com,
        gouwa@...das.com
Subject: [PATCH] arm64: dts: meson-sm1: add spdifin spdifout nodes

Add spdifin spdifout nodes for Amlogic SM1 SoCs.

Signed-off-by: Artem Lapkin <art@...das.com>
---

SPDIF IN and SPDIF OUT both tested and works fine for VIM3L (meson-sm1)
same as for VIM3 (meson-g12)

SPDIF in and SPDIF OUT both pins available via GPIO header (SPDIF_OUT PIN
13 spdif_ao_out_pins and SPDIF_IN PIN 35 - same PWM_F spdif_in_h_pins)

https://lore.kernel.org/linux-arm-kernel/1jtuhwvqxa.fsf@starbuckisacylon.baylibre.com/t/

ALSA spdifin test example
=========================

# arecord -fS16_LE -r48000 -c2 -Dplug:spdifin

# cat .asoundrc
pcm.spdifin {
type iec958
slave {
pcm "hw:0,1"
format IEC958_SUBFRAME_LE
}
}

DT sound card configs for testing
=================================

&spdifout {
    pinctrl-0 = <&spdif_ao_out_pins>;
    pinctrl-names = "default";
    status = "okay";
};

&spdifin {
    pinctrl-0 = <&spdif_in_h_pins>;
    pinctrl-names = "default";
    status = "okay";
};

...
    spdif_dit: audio-codec-1 {
	#sound-dai-cells = <0>;
	compatible = "linux,spdif-dit";
	status = "okay";
	sound-name-prefix = "DIT";
    };

    spdif_dir: audio-codec-2 {
	#sound-dai-cells = <0>;
	compatible = "linux,spdif-dir";
	status = "okay";
	sound-name-prefix = "DIR";
    };
...
	audio-routing = ...
		"TODDR_B IN 3", "SPDIFIN Capture",
		"SPDIFOUT IN 0", "FRDDR_A OUT 3";

...
	dai-link-10 {
	    sound-dai = <&spdifout>;

	    codec-0 {
		sound-dai = <&spdif_dit>;
	    };
	};

	/* spdif or toslink interface */
	dai-link-11 {
	    sound-dai = <&spdifin>;

	    codec-0 {
		sound-dai = <&spdif_dir>;
	    };
	};
...

---
 arch/arm64/boot/dts/amlogic/meson-sm1.dtsi | 27 ++++++++++++++++++++++
 1 file changed, 27 insertions(+)

diff --git a/arch/arm64/boot/dts/amlogic/meson-sm1.dtsi b/arch/arm64/boot/dts/amlogic/meson-sm1.dtsi
index 3d8b1f4f2001..1e0adf259d61 100644
--- a/arch/arm64/boot/dts/amlogic/meson-sm1.dtsi
+++ b/arch/arm64/boot/dts/amlogic/meson-sm1.dtsi
@@ -356,6 +356,33 @@ tdmin_lb: audio-controller@3c0 {
 			status = "disabled";
 		};
 
+		spdifin: audio-controller@400 {
+			compatible = "amlogic,g12a-spdifin",
+			"amlogic,axg-spdifin";
+			reg = <0x0 0x400 0x0 0x30>;
+			#sound-dai-cells = <0>;
+			sound-name-prefix = "SPDIFIN";
+			interrupts = <GIC_SPI 151 IRQ_TYPE_EDGE_RISING>;
+			clocks = <&clkc_audio AUD_CLKID_SPDIFIN>,
+			<&clkc_audio AUD_CLKID_SPDIFIN_CLK>;
+			clock-names = "pclk", "refclk";
+			resets = <&clkc_audio AUD_RESET_SPDIFIN>;
+			status = "disabled";
+		};
+
+		spdifout: audio-controller@480 {
+			compatible = "amlogic,g12a-spdifout",
+			"amlogic,axg-spdifout";
+			reg = <0x0 0x480 0x0 0x50>;
+			#sound-dai-cells = <0>;
+			sound-name-prefix = "SPDIFOUT";
+			clocks = <&clkc_audio AUD_CLKID_SPDIFOUT>,
+			<&clkc_audio AUD_CLKID_SPDIFOUT_CLK>;
+			clock-names = "pclk", "mclk";
+			resets = <&clkc_audio AUD_RESET_SPDIFOUT>;
+			status = "disabled";
+		};
+
 		tdmout_a: audio-controller@500 {
 			compatible = "amlogic,sm1-tdmout";
 			reg = <0x0 0x500 0x0 0x40>;
-- 
2.25.1