arm64: dts: ti: k3-am62-verdin: Add DSI to HDMI adapter overlay

Add a device-tree overlay for the Toradex DSI to HDMI Adapter, an
accessory that connects to the Verdin DSI_1 interface and provides a
full-size HDMI Type-A output. The adapter is based on the Lontium
LT8912B DSI-to-HDMI bridge.

The overlay is also combined with the Verdin AM62 carrier board device
trees to provide ready-to-use DTBs for the Dahlia and Development Board
carriers, in both WiFi and non-WiFi SoM variants.

Link: https://developer.toradex.com/hardware/accessories/add-ons/dsi-hdmi-adapter
Signed-off-by: Vitor Soares <vitor.soares@toradex.com>
Link: https://patch.msgid.link/20260506143427.348806-2-ivitro@gmail.com
Signed-off-by: Nishanth Menon <nm@ti.com>

diff --git a/arch/arm64/boot/dts/ti/Makefile b/arch/arm64/boot/dts/ti/Makefile
index 7642c06ca83495e1098936e218c0f984cf293f85..21db60cd19de6744e512fb11be7cfc93120bb771 100644 (file)
--- a/arch/arm64/boot/dts/ti/Makefile
+++ b/arch/arm64/boot/dts/ti/Makefile
@@ -9,19 +9,32 @@
 # alphabetically.
 
 # Boards with AM62x SoC
+k3-am625-verdin-nonwifi-dahlia-dsi-to-hdmi-dtbs := k3-am625-verdin-nonwifi-dahlia.dtb \
+       k3-am625-verdin-dsi-to-hdmi.dtbo
+k3-am625-verdin-nonwifi-dev-dsi-to-hdmi-dtbs := k3-am625-verdin-nonwifi-dev.dtb \
+       k3-am625-verdin-dsi-to-hdmi.dtbo
+k3-am625-verdin-wifi-dahlia-dsi-to-hdmi-dtbs := k3-am625-verdin-wifi-dahlia.dtb \
+       k3-am625-verdin-dsi-to-hdmi.dtbo
+k3-am625-verdin-wifi-dev-dsi-to-hdmi-dtbs := k3-am625-verdin-wifi-dev.dtb \
+       k3-am625-verdin-dsi-to-hdmi.dtbo
 dtb-$(CONFIG_ARCH_K3) += k3-am625-beagleplay.dtb
 dtb-$(CONFIG_ARCH_K3) += k3-am625-beagleplay-csi2-ov5640.dtbo
 dtb-$(CONFIG_ARCH_K3) += k3-am625-beagleplay-csi2-tevi-ov5640.dtbo
 dtb-$(CONFIG_ARCH_K3) += k3-am625-phyboard-lyra-rdk.dtb
 dtb-$(CONFIG_ARCH_K3) += k3-am625-sk.dtb
 dtb-$(CONFIG_ARCH_K3) += k3-am625-tqma62xx-mba62xx.dtb
+dtb-$(CONFIG_ARCH_K3) += k3-am625-verdin-dsi-to-hdmi.dtbo
+dtb-$(CONFIG_ARCH_K3) += k3-am625-verdin-nonwifi-dahlia-dsi-to-hdmi.dtb
 dtb-$(CONFIG_ARCH_K3) += k3-am625-verdin-nonwifi-dahlia.dtb
+dtb-$(CONFIG_ARCH_K3) += k3-am625-verdin-nonwifi-dev-dsi-to-hdmi.dtb
 dtb-$(CONFIG_ARCH_K3) += k3-am625-verdin-nonwifi-dev.dtb
 dtb-$(CONFIG_ARCH_K3) += k3-am625-verdin-nonwifi-ivy.dtb
 dtb-$(CONFIG_ARCH_K3) += k3-am625-verdin-nonwifi-mallow.dtb
 dtb-$(CONFIG_ARCH_K3) += k3-am625-verdin-nonwifi-yavia.dtb
 dtb-$(CONFIG_ARCH_K3) += k3-am625-verdin-nonwifi-zinnia.dtb
+dtb-$(CONFIG_ARCH_K3) += k3-am625-verdin-wifi-dahlia-dsi-to-hdmi.dtb
 dtb-$(CONFIG_ARCH_K3) += k3-am625-verdin-wifi-dahlia.dtb
+dtb-$(CONFIG_ARCH_K3) += k3-am625-verdin-wifi-dev-dsi-to-hdmi.dtb
 dtb-$(CONFIG_ARCH_K3) += k3-am625-verdin-wifi-dev.dtb
 dtb-$(CONFIG_ARCH_K3) += k3-am625-verdin-wifi-ivy.dtb
 dtb-$(CONFIG_ARCH_K3) += k3-am625-verdin-wifi-mallow.dtb

diff --git a/arch/arm64/boot/dts/ti/k3-am625-verdin-dsi-to-hdmi.dtso b/arch/arm64/boot/dts/ti/k3-am625-verdin-dsi-to-hdmi.dtso
new file mode 100644 (file)
index 0000000..a219faf
--- /dev/null
+++ b/arch/arm64/boot/dts/ti/k3-am625-verdin-dsi-to-hdmi.dtso
@@ -0,0 +1,94 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+/*
+ * Copyright (c) Toradex
+ *
+ * Toradex DSI to HDMI Adapter on Verdin DSI_1
+ *
+ * https://developer.toradex.com/hardware/accessories/add-ons/dsi-hdmi-adapter
+ */
+
+/dts-v1/;
+/plugin/;
+
+#include <dt-bindings/gpio/gpio.h>
+
+&{/} {
+       hdmi-connector {
+               compatible = "hdmi-connector";
+               pinctrl-names = "default";
+               pinctrl-0 = <&pinctrl_pwm3_dsi_gpio>;
+               ddc-i2c-bus = <&main_i2c2>;
+               /* Verdin PWM_3_DSI (SODIMM 19) */
+               hpd-gpios = <&main_gpio1 17 GPIO_ACTIVE_HIGH>;
+               type = "a";
+
+               port {
+                       hdmi_connector_in: endpoint {
+                               remote-endpoint = <&dsi_hdmi_bridge_out>;
+                       };
+               };
+       };
+};
+
+&dsi_bridge {
+       status = "okay";
+};
+
+&dsi_bridge_ports {
+       #address-cells = <1>;
+       #size-cells = <0>;
+
+       port@1 {
+               reg = <1>;
+
+               dsi_bridge_out: endpoint {
+                       remote-endpoint = <&dsi_hdmi_bridge_in>;
+               };
+       };
+};
+
+&dss {
+       status = "okay";
+};
+
+/* Verdin PWM_3_DSI (SODIMM 19) repurposed as HDMI HPD GPIO */
+&epwm1 {
+       status = "disabled";
+};
+
+/* Verdin I2C_1 */
+&main_i2c1 {
+       #address-cells = <1>;
+       #size-cells = <0>;
+
+       hdmi@48 {
+               compatible = "lontium,lt8912b";
+               reg = <0x48>;
+               pinctrl-names = "default";
+               pinctrl-0 = <&pinctrl_dsi1_bkl_en>;
+               /* Verdin GPIO_10_DSI (SODIMM 21) */
+               reset-gpios = <&main_gpio0 30 GPIO_ACTIVE_LOW>;
+
+               ports {
+                       #address-cells = <1>;
+                       #size-cells = <0>;
+
+                       port@0 {
+                               reg = <0>;
+
+                               dsi_hdmi_bridge_in: endpoint {
+                                       data-lanes = <1 2 3 4>;
+                                       remote-endpoint = <&dsi_bridge_out>;
+                               };
+                       };
+
+                       port@1 {
+                               reg = <1>;
+
+                               dsi_hdmi_bridge_out: endpoint {
+                                       remote-endpoint = <&hdmi_connector_in>;
+                               };
+                       };
+               };
+       };
+};