verdin-imx8mm: add dsi-to-hdmi overlay

Add Verdin DSI to HDMI Adapter (dsi-to-hdmi) with Lontium LT8912B MIPI
DSI to HDMI bridge chip device tree overlay compatible with mainline/
master/upstream v6.5-rc2 Linux kernel and device trees.

Signed-off-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>

2 files changed, 82 insertions, 0 deletions

diff --git a/overlays/Makefile b/overlays/Makefile
index 9ad76e0..43d6980 100644
--- a/overlays/Makefile
+++ b/overlays/Makefile
@@ -52,6 +52,7 @@ dtb-y += colibri-imx7_panel-cap-touch-10inch-lvds_overlay.dtbo
 dtb-y += colibri-imx7_panel-res-touch-7inch_overlay.dtbo
 dtb-y += colibri-imx7_spidev_overlay.dtbo
 dtb-y += colibri-imx7_vga-640x480_overlay.dtbo
+dtb-y += verdin-imx8mm_dsi-to-hdmi_overlay.dtbo
 dtb-y += verdin-imx8mm_dsi-to-lvds_panel-cap-touch-10inch-lvds_overlay.dtbo
 dtb-y += verdin-imx8mm_nau8822-btl_overlay.dtbo
 dtb-y += verdin-imx8mm_spidev_overlay.dtbo
diff --git a/overlays/verdin-imx8mm_dsi-to-hdmi_overlay.dts b/overlays/verdin-imx8mm_dsi-to-hdmi_overlay.dts
new file mode 100644
index 0000000..5edfbd0
--- /dev/null
+++ b/overlays/verdin-imx8mm_dsi-to-hdmi_overlay.dts
@@ -0,0 +1,81 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+/*
+ * Copyright 2022 Toradex
+ */
+
+// Verdin DSI to HDMI Adapter orderable at Toradex.
+
+/dts-v1/;
+/plugin/;
+
+/ {
+	compatible = "toradex,verdin-imx8mm";
+};
+
+&mipi_dsi {
+	samsung,esc-clock-frequency = <16000000>;
+	status = "okay";
+
+	ports {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		port@1 {
+			reg = <1>;
+
+			mipi_dsi_bridge1_out: endpoint {
+				attach-bridge;
+				remote-endpoint = <&lt8912_1_in>;
+			};
+		};
+	};
+};
+
+&hdmi_lontium_lt8912 {
+	status = "okay";
+
+	ports {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		port@0 {
+			reg = <0>;
+
+			lt8912_1_in: endpoint {
+				data-lanes = <1 2 3 4>;
+				remote-endpoint = <&mipi_dsi_bridge1_out>;
+			};
+		};
+
+		port@1 {
+			reg = <1>;
+
+			lt8912_1_out: endpoint {
+				remote-endpoint = <&hdmi_connector_in>;
+			};
+		};
+	};
+};
+
+&hdmi_connector {
+	status = "okay";
+
+	port {
+		hdmi_connector_in: endpoint {
+			remote-endpoint = <&lt8912_1_out>;
+		};
+	};
+};
+
+/* Verdin I2C_2_DSI */
+&i2c2 {
+	status = "okay";
+};
+
+&lcdif {
+	status = "okay";
+};
+
+&pwm1 {
+	status = "disabled";
+};