arm64: dts: ti: k3-am68-phyboard-izar: Add PEB-AV-15 overlay

Add an overlay to use the PEB-AV-15 AV-Adapter. It's a small expansion board
using a Lontium LT8912B DSI->HDMI bridge and a TLV320AIC3007 audio codec.

Signed-off-by: Dominik Haller <d.haller@phytec.de>
Link: https://patch.msgid.link/20260320212349.420951-6-d.haller@phytec.de
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>

Author: dominiknh90

arch/arm64/boot/dts/ti/Makefile

@@ -135,6 +135,9 @@ dtb-$(CONFIG_ARCH_K3) += k3-am68-phyboard-izar.dtb
 dtb-$(CONFIG_ARCH_K3) += k3-am68-phyboard-izar-lvds-ph128800t006.dtb
 k3-am68-phyboard-izar-lvds-ph128800t006-dtbs := k3-am68-phyboard-izar.dtb \
 	k3-am68-phyboard-izar-lvds-ph128800t006.dtbo
+dtb-$(CONFIG_ARCH_K3) += k3-am68-phyboard-izar-peb-av-15.dtb
+k3-am68-phyboard-izar-peb-av-15-dtbs := k3-am68-phyboard-izar.dtb \
+        k3-am68-phyboard-izar-peb-av-15.dtbo
 dtb-$(CONFIG_ARCH_K3) += k3-am68-sk-base-board.dtb
 dtb-$(CONFIG_ARCH_K3) += k3-am68-sk-base-board-pcie1-ep.dtbo
 dtb-$(CONFIG_ARCH_K3) += k3-j721s2-common-proc-board.dtb
@@ -310,6 +313,7 @@ dtb- += k3-am625-beagleplay-csi2-ov5640.dtb \
 	k3-am642-tqma64xxl-mbax4xxl-sdcard.dtb \
 	k3-am642-tqma64xxl-mbax4xxl-wlan.dtb \
 	k3-am68-phyboard-izar-lvds-ph128800t006.dtb \
+	k3-am68-phyboard-izar-peb-av-15.dtb \
 	k3-am68-sk-base-board-csi2-dual-imx219.dtb \
 	k3-am68-sk-base-board-pcie1-ep.dtb \
 	k3-am69-sk-csi2-dual-imx219.dtb \

arch/arm64/boot/dts/ti/k3-am68-phyboard-izar-peb-av-15.dtso

@@ -0,0 +1,191 @@
+// SPDX-License-Identifier: GPL-2.0-only OR MIT
+/*
+ * Copyright (C) 2026 PHYTEC Messtechnik GmbH
+ * Author: Dominik Haller <d.haller@phytec.de>
+ */
+
+/dts-v1/;
+/plugin/;
+
+#include <dt-bindings/gpio/gpio.h>
+#include "k3-pinctrl.h"
+
+&{/} {
+	audio_refclk1: audio-clock {
+		compatible = "fixed-clock";
+		#clock-cells = <0>;
+		clock-frequency = <19200000>;
+	};
+
+	hdmi: hdmi-connector {
+		compatible = "hdmi-connector";
+		label = "hdmi";
+		type = "a";
+		ddc-i2c-bus = <&main_i2c2>;
+
+		port {
+			hdmi_connector_in: endpoint {
+				remote-endpoint = <&lt8912b_out>;
+			};
+		};
+	};
+
+	reg_audio_3v3: regulator-audio-3v3 {
+		compatible = "regulator-fixed";
+		regulator-name = "VCC3V3_AUDIO";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		regulator-always-on;
+	};
+
+	reg_audio_1v8: regulator-audio-1v8 {
+		compatible = "regulator-fixed";
+		regulator-name = "VCC1V8_AUDIO";
+		regulator-min-microvolt = <1800000>;
+		regulator-max-microvolt = <1800000>;
+		regulator-always-on;
+	};
+
+	sound {
+		compatible = "simple-audio-card";
+		simple-audio-card,name = "PEB-AV-15";
+		simple-audio-card,widgets =
+			"Headphone", "Headphone Jack",
+			"Microphone", "Mic Jack";
+		simple-audio-card,routing =
+			"Headphone Jack", "HPLOUT",
+			"Headphone Jack", "HPROUT",
+			"MIC3R", "Mic Jack",
+			"Mic Jack", "Mic Bias";
+		simple-audio-card,format = "dsp_b";
+		simple-audio-card,bitclock-inversion;
+		simple-audio-card,bitclock-master = <&link0_codec>;
+		simple-audio-card,frame-master = <&link0_codec>;
+
+		link0_cpu: simple-audio-card,cpu {
+			sound-dai = <&mcasp0>;
+		};
+
+		link0_codec: simple-audio-card,codec {
+			sound-dai = <&audio_codec>;
+			clocks = <&audio_refclk1>;
+		};
+	};
+
+};
+
+&dphy_tx1 {
+	status = "okay";
+};
+
+&dsi1 {
+	status = "okay";
+};
+
+&dsi1_ports {
+	#address-cells = <1>;
+	#size-cells = <0>;
+	port@0 {
+		reg = <0>;
+		dsi1_out: endpoint {
+			remote-endpoint = <&lt8912b_in>;
+		};
+	};
+
+	port@1 {
+		reg = <1>;
+		dsi1_in: endpoint {
+			remote-endpoint = <&dpi3_out>;
+		};
+	};
+};
+
+&dss {
+	status = "okay";
+};
+
+&dss_ports {
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	port@3 {
+		reg = <3>;
+		dpi3_out: endpoint {
+			remote-endpoint = <&dsi1_in>;
+		};
+	};
+};
+
+&mcasp0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&mcasp0_pins>;
+
+	#sound-dai-cells = <0>;
+
+	op-mode = <0>;	/* MCASP_IIS_MODE */
+	tdm-slots = <2>;
+
+	/* 4 serializers */
+	serial-dir = <  /* 0: INACTIVE, 1: TX, 2: RX */
+		2 0 0 1
+		0 0 0 0
+		0 0 0 0
+		0 0 0 0
+	>;
+
+	tx-num-evt = <32>;
+	rx-num-evt = <32>;
+	status = "okay";
+};
+
+&main_i2c2 {
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	audio_codec: audio-codec@18 {
+		compatible = "ti,tlv320aic3007";
+		reg = <0x18>;
+		#sound-dai-cells = <0>;
+		ai3x-micbias-vg = <2>;
+		AVDD-supply = <&reg_audio_3v3>;
+		IOVDD-supply = <&reg_audio_3v3>;
+		DRVDD-supply = <&reg_audio_3v3>;
+		DVDD-supply = <&reg_audio_1v8>;
+	};
+
+	bridge@48 {
+		compatible = "lontium,lt8912b";
+		reg = <0x48>;
+
+		ports {
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			port@0 {
+				reg = <0>;
+				lt8912b_in: endpoint {
+					data-lanes = <0 1 2 3>;
+					remote-endpoint = <&dsi1_out>;
+				};
+			};
+
+			port@1 {
+				reg = <1>;
+				lt8912b_out: endpoint {
+					remote-endpoint = <&hdmi_connector_in>;
+				};
+			};
+		};
+	};
+};
+
+&main_pmx0 {
+	mcasp0_pins: mcasp0-default-pins {
+		pinctrl-single,pins = <
+			J721S2_IOPAD(0x03c, PIN_INPUT, 1) /* (U27) WCLK, MCASP0_AFSX.MCASP0_AFSX */
+			J721S2_IOPAD(0x038, PIN_INPUT, 1) /* (AB28) BCLK, MCASP0_ACLKX.MCASP0_ACLKX */
+			J721S2_IOPAD(0x040, PIN_OUTPUT, 1) /* (AC28) DOUT, MCASP0_AXR0.MCASP0_AXR0 */
+			J721S2_IOPAD(0x07c, PIN_INPUT, 1) /* (T27) DIN, MCASP0_AXR3.MCASP0_AXR3 */
+		>;
+	};
+};