linux-kernel - [PATCH] ARM: dts: stm32: add hdmi audio support to stm32mp157a-dk1 board

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Date:   Thu, 10 Oct 2019 15:02:47 +0200
From:   Olivier Moysan <olivier.moysan@...com>
To:     <linux-stm32@...md-mailman.stormreply.com>,
        <alexandre.torgue@...com>, <robh@...nel.org>,
        <mark.rutland@....com>, <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <olivier.moysan@...com>
Subject: [PATCH] ARM: dts: stm32: add hdmi audio support to stm32mp157a-dk1 board

Add HDMI audio support through Sil9022 HDMI transceiver
on stm32mp157a-dk1 board.

Signed-off-by: Olivier Moysan <olivier.moysan@...com>
---
 arch/arm/boot/dts/stm32mp157a-dk1.dts | 27 ++++++++++++++++++++++++++-
 1 file changed, 26 insertions(+), 1 deletion(-)

diff --git a/arch/arm/boot/dts/stm32mp157a-dk1.dts b/arch/arm/boot/dts/stm32mp157a-dk1.dts
index 5ad4cef9e971..7a20640c00a9 100644
--- a/arch/arm/boot/dts/stm32mp157a-dk1.dts
+++ b/arch/arm/boot/dts/stm32mp157a-dk1.dts
@@ -92,7 +92,7 @@
 			"Playback" , "MCLK",
 			"Capture" , "MCLK",
 			"MICL" , "Mic Bias";
-		dais = <&sai2a_port &sai2b_port>;
+		dais = <&sai2a_port &sai2b_port &i2s2_port>;
 		status = "okay";
 	};
 };
@@ -173,6 +173,7 @@
 		reset-gpios = <&gpioa 10 GPIO_ACTIVE_LOW>;
 		interrupts = <1 IRQ_TYPE_EDGE_FALLING>;
 		interrupt-parent = <&gpiog>;
+		#sound-dai-cells = <0>;
 		status = "okay";
 
 		ports {
@@ -185,6 +186,13 @@
 					remote-endpoint = <&ltdc_ep0_out>;
 				};
 			};
+
+			port@3 {
+				reg = <3>;
+				sii9022_tx_endpoint: endpoint {
+					remote-endpoint = <&i2s2_endpoint>;
+				};
+			};
 		};
 	};
 
@@ -370,6 +378,23 @@
 	};
 };
 
+&i2s2 {
+	clocks = <&rcc SPI2>, <&rcc SPI2_K>, <&rcc PLL3_Q>, <&rcc PLL3_R>;
+	clock-names = "pclk", "i2sclk", "x8k", "x11k";
+	pinctrl-names = "default", "sleep";
+	pinctrl-0 = <&i2s2_pins_a>;
+	pinctrl-1 = <&i2s2_pins_sleep_a>;
+	status = "okay";
+
+	i2s2_port: port {
+		i2s2_endpoint: endpoint {
+			remote-endpoint = <&sii9022_tx_endpoint>;
+			format = "i2s";
+			mclk-fs = <256>;
+		};
+	};
+};
+
 &ipcc {
 	status = "okay";
 };
-- 
2.17.1