[PATCH v2] arm64: dts: ti: k3-am69-aquila: Add Toradex DSI to LVDS adapter with the 10.1" V2 display

[Leonardo Costa <leoreis.costa@gmail.com>]

From: Leonardo Costa <leonardo.costa@toradex.com>

Add a device tree overlay for the Toradex DSI to LVDS Adapter with the
Toradex Capacitive Touch Display 10.1" LVDS V2. The adapter connects to the
Aquila DSI_1 interface. It is based on the Texas Instruments SN65DSI84
DSI-to-LVDS bridge and drives an Opto Logic SCX1001511GGC49 10.1" WXGA TFT
LCD LVDS panel. Touch input is provided by an ILITEK ILI251x capacitive
touch controller.

Link: https://developer.toradex.com/hardware/accessories/add-ons/dsi-lvds-adapter
Link: https://developer.toradex.com/hardware/accessories/displays/capacitive-touch-display-101inch-lvds
Signed-off-by: Leonardo Costa <leonardo.costa@toradex.com>
---
Changes in v2:
- Add comment explaining the panel timings difference between this
  overlay and the ones for the native LVDS interface (without the DSI to
  LVDS bridge).
- Add information in the hardware pin comments about which signals in
  the DSI to LVDS bridge each pin connects to.
- Add comment explaining why the rising edge is used on the TOUCH_INT#
  signal.
- Link to v1: https://lore.kernel.org/all/20260803173705.2268792-1-leoreis.costa@gmail.com/T/#
---
 arch/arm64/boot/dts/ti/Makefile               |   5 +
 ...dsi-to-lvds-v2-panel-cap-touch-10inch.dtso | 161 ++++++++++++++++++
 2 files changed, 166 insertions(+)
 create mode 100644 arch/arm64/boot/dts/ti/k3-am69-aquila-dsi-to-lvds-v2-panel-cap-touch-10inch.dtso

diff --git a/arch/arm64/boot/dts/ti/Makefile b/arch/arm64/boot/dts/ti/Makefile
index 795978e962ee..536a34e132ed 100644
--- a/arch/arm64/boot/dts/ti/Makefile
+++ b/arch/arm64/boot/dts/ti/Makefile
@@ -225,6 +225,7 @@ dtb-$(CONFIG_ARCH_K3) += k3-am69-aquila-dev.dtb
 dtb-$(CONFIG_ARCH_K3) += k3-am69-aquila-dev-dsi-to-hdmi.dtb
 dtb-$(CONFIG_ARCH_K3) += k3-am69-aquila-dsi-to-hdmi.dtbo
 dtb-$(CONFIG_ARCH_K3) += k3-am69-aquila-dsi-to-lvds-panel-cap-touch-10inch.dtbo
+dtb-$(CONFIG_ARCH_K3) += k3-am69-aquila-dsi-to-lvds-v2-panel-cap-touch-10inch.dtbo
 dtb-$(CONFIG_ARCH_K3) += k3-am69-aquila-panel-cap-touch-10inch-dsi.dtbo
 dtb-$(CONFIG_ARCH_K3) += k3-am69-aquila-panel-cap-touch-7inch-dsi.dtbo
 dtb-$(CONFIG_ARCH_K3) += k3-am69-sk.dtb
@@ -389,6 +390,9 @@ k3-am69-aquila-dev-csi-ov5640-dtbs := \
 k3-am69-aquila-dev-dsi-to-lvds-panel-cap-touch-10inch-dtbs := \
 	k3-am69-aquila-dev.dtb \
 	k3-am69-aquila-dsi-to-lvds-panel-cap-touch-10inch.dtbo
+k3-am69-aquila-dev-dsi-to-lvds-v2-panel-cap-touch-10inch-dtbs := \
+	k3-am69-aquila-dev.dtb \
+	k3-am69-aquila-dsi-to-lvds-v2-panel-cap-touch-10inch.dtbo
 k3-am69-sk-csi2-dual-imx219-dtbs := k3-am69-sk.dtb \
 	k3-j721e-sk-csi2-dual-imx219.dtbo
 k3-am69-sk-pcie0-ep-dtbs := k3-am69-sk.dtb \
@@ -491,6 +495,7 @@ dtb- += k3-am625-beagleplay-csi2-ov5640.dtb \
 	k3-am69-aquila-dev-csi-ov5640-24mhz.dtb \
 	k3-am69-aquila-dev-csi-ov5640.dtb \
 	k3-am69-aquila-dev-dsi-to-lvds-panel-cap-touch-10inch.dtb \
+	k3-am69-aquila-dev-dsi-to-lvds-v2-panel-cap-touch-10inch.dtb \
 	k3-am69-sk-csi2-dual-imx219.dtb \
 	k3-am69-sk-pcie0-ep.dtb \
 	k3-j7200-evm-pcie1-ep.dtb \
diff --git a/arch/arm64/boot/dts/ti/k3-am69-aquila-dsi-to-lvds-v2-panel-cap-touch-10inch.dtso b/arch/arm64/boot/dts/ti/k3-am69-aquila-dsi-to-lvds-v2-panel-cap-touch-10inch.dtso
new file mode 100644
index 000000000000..92e270611f05
--- /dev/null
+++ b/arch/arm64/boot/dts/ti/k3-am69-aquila-dsi-to-lvds-v2-panel-cap-touch-10inch.dtso
@@ -0,0 +1,161 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+/*
+ * Copyright (c) Toradex
+ *
+ * Toradex DSI to LVDS Adapter on Aquila DSI_1 with Capacitive Touch Display
+ * 10.1" V2 Used on Development Board (J44). DSI_1 is exposed via a Samtec
+ * LSS-130 connector.
+ *
+ * https://developer.toradex.com/hardware/accessories/displays/capacitive-touch-display-101inch-lvds
+ * https://www.toradex.com/accessories/capacitive-touch-display-10.1-inch-lvds
+ * https://developer.toradex.com/hardware/accessories/add-ons/dsi-lvds-adapter
+ * https://www.toradex.com/accessories/verdin-dsi-to-lvds-adapter
+ */
+
+/dts-v1/;
+/plugin/;
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/interrupt-controller/irq.h>
+
+&{/} {
+	backlight_pwm3: backlight-pwm3 {
+		compatible = "pwm-backlight";
+		pinctrl-names = "default";
+		pinctrl-0 = <&pinctrl_gpio_19_dsi_1>;
+		brightness-levels = <0 45 63 88 119 158 203 255>;
+		default-brightness-level = <4>;
+		/* Aquila GPIO_19_DSI_1 (AQUILA B44) - DSI_1_BKL_EN_LVDS */
+		enable-gpios = <&main_gpio0 13 GPIO_ACTIVE_HIGH>;
+		/* Aquila PWM_3_DSI (AQUILA B46) - PWM_3_DSI_LVDS */
+		pwms = <&main_ehrpwm5 0 6666667 0>;
+	};
+
+	panel-lvds-bridge {
+		compatible = "optologic,scx1001511ggc49", "panel-lvds";
+		backlight = <&backlight_pwm3>;
+		data-mapping = "vesa-24";
+		height-mm = <136>;
+		width-mm = <217>;
+
+		/*
+		 * The timings here are different from the nominal ones for the
+		 * SCX1001511GGC49 display. The clock-frequency, along with the
+		 * other timings, are adjusted from experimentation to work
+		 * consistently with the DSI to LVDS bridge (TI SN65DSI84)
+		 * across Toradex modules that use it.
+		 */
+		panel-timing {
+			clock-frequency = <70000000>;
+			hactive = <1280>;
+			hback-porch = <55>;
+			hfront-porch = <55>;
+			hsync-len = <45>;
+			vactive = <800>;
+			vback-porch = <5>;
+			vfront-porch = <5>;
+			vsync-len = <3>;
+			de-active = <1>;
+			hsync-active = <0>;
+			vsync-active = <0>;
+			pixelclk-active = <0>;
+		};
+
+		port {
+			panel_lvds_bridge_in: endpoint {
+				remote-endpoint = <&dsi_lvds_bridge_out>;
+			};
+		};
+	};
+};
+
+&dphy_tx0 {
+	status = "okay";
+};
+
+&dsi0 {
+	status = "okay";
+};
+
+&dsi0_ports {
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	port@0 {
+		reg = <0>;
+
+		dsi0_out: endpoint {
+			remote-endpoint = <&dsi_lvds_bridge_in>;
+		};
+	};
+
+	port@1 {
+		reg = <1>;
+
+		dsi0_in: endpoint {
+			remote-endpoint = <&dpi2_out>;
+		};
+	};
+};
+
+&dss_ports {
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	port@2 {
+		reg = <2>;
+
+		dpi2_out: endpoint {
+			remote-endpoint = <&dsi0_in>;
+		};
+	};
+};
+
+&i2c_dsi_0 {
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	bridge@2c {
+		compatible = "ti,sn65dsi84";
+		reg = <0x2c>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&pinctrl_gpio_20_dsi_1>;
+		/* Aquila GPIO_20_DSI_1 (AQUILA B45) - LVDS_EN */
+		enable-gpios = <&main_gpio0 18 GPIO_ACTIVE_HIGH>;
+
+		ports {
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			port@0 {
+				reg = <0>;
+
+				dsi_lvds_bridge_in: endpoint {
+					remote-endpoint = <&dsi0_out>;
+					data-lanes = <1 2 3 4>;
+				};
+			};
+
+			port@2 {
+				reg = <2>;
+
+				dsi_lvds_bridge_out: endpoint {
+					remote-endpoint = <&panel_lvds_bridge_in>;
+				};
+			};
+		};
+	};
+
+	touchscreen@41 {
+		compatible = "ilitek,ili251x";
+		reg = <0x41>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&pinctrl_gpio_17_dsi_1>, <&pinctrl_gpio_18_dsi_1>;
+		/* Aquila GPIO_17_DSI_1 (AQUILA B42) - TOUCH_INT# */
+		/* Rising edge avoids spurious interrupts from the noisy falling edge. */
+		interrupt-parent = <&main_gpio0>;
+		interrupts = <12 IRQ_TYPE_EDGE_RISING>;
+		/* Aquila GPIO_18_DSI_1 (AQUILA B43) - TOUCH_RESET# */
+		reset-gpios = <&main_gpio0 31 GPIO_ACTIVE_LOW>;
+	};
+};