[PATCH 5/5] arm64: dts: freescale: imx8mp-toradex-smarc: Add Toradex Capacitive Touch Display 7" DSI

From: Ernest Van Hoecke

Date: Fri Oct 02 2026 - 04:02:08 EST

From: Ernest Van Hoecke <ernest.vanhoecke@xxxxxxxxxxx>

Add a device tree overlay for the Toradex Capacitive Touch Display 7"
on the Toradex SMARC Development Board DSI connector. The display
features an internal Texas Instruments SN65DSI83 DSI-to-LVDS bridge
driving a Riverdi RVT70HSLNWCA0 7" WSVGA IPS TFT LCD panel. The touch
input is provided by an Ilitek ILI2132 capacitive touch controller.

The overlay is also combined with the SMARC Development Board device
tree to provide a ready-to-use DTB.

Link: https://developer.toradex.com/hardware/accessories/displays/capacitive-touch-display-7inch-dsi
Link: https://developer.toradex.com/hardware/accessories/add-ons/dsi-display-adapter
Signed-off-by: Ernest Van Hoecke <ernest.vanhoecke@xxxxxxxxxxx>
---
arch/arm64/boot/dts/freescale/Makefile | 4 +
...ex-smarc-adapter-panel-cap-touch-7inch-dsi.dtso | 124 +++++++++++++++++++++
2 files changed, 128 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/Makefile b/arch/arm64/boot/dts/freescale/Makefile
index 2ec50811ee1a..1310b34178e5 100644
--- a/arch/arm64/boot/dts/freescale/Makefile
+++ b/arch/arm64/boot/dts/freescale/Makefile
@@ -710,7 +710,9 @@ dtb-$(CONFIG_ARCH_MXC) += imx8mp-skov-revc-hdmi.dtb
dtb-$(CONFIG_ARCH_MXC) += imx8mp-skov-revc-tian-g07017.dtb
dtb-$(CONFIG_ARCH_MXC) += imx8mp-skov-revc-jutouch-jt101tm023.dtb
dtb-$(CONFIG_ARCH_MXC) += imx8mp-toradex-smarc-adapter-panel-cap-touch-10inch-dsi.dtbo
+dtb-$(CONFIG_ARCH_MXC) += imx8mp-toradex-smarc-adapter-panel-cap-touch-7inch-dsi.dtbo
dtb-$(CONFIG_ARCH_MXC) += imx8mp-toradex-smarc-dev-adapter-panel-cap-touch-10inch-dsi.dtb
+dtb-$(CONFIG_ARCH_MXC) += imx8mp-toradex-smarc-dev-adapter-panel-cap-touch-7inch-dsi.dtb
dtb-$(CONFIG_ARCH_MXC) += imx8mp-toradex-smarc-dev-dsi-to-hdmi.dtb
dtb-$(CONFIG_ARCH_MXC) += imx8mp-toradex-smarc-dev-panel-cap-touch-10inch-lvds.dtb
dtb-$(CONFIG_ARCH_MXC) += imx8mp-toradex-smarc-dev.dtb
@@ -722,6 +724,8 @@ dtb-$(CONFIG_ARCH_MXC) += imx8mp-tqma8mpqs-mb-smarc-2.dtb

imx8mp-toradex-smarc-dev-adapter-panel-cap-touch-10inch-dsi-dtbs := imx8mp-toradex-smarc-dev.dtb \
imx8mp-toradex-smarc-adapter-panel-cap-touch-10inch-dsi.dtbo
+imx8mp-toradex-smarc-dev-adapter-panel-cap-touch-7inch-dsi-dtbs := imx8mp-toradex-smarc-dev.dtb \
+ imx8mp-toradex-smarc-adapter-panel-cap-touch-7inch-dsi.dtbo
imx8mp-toradex-smarc-dev-dsi-to-hdmi-dtbs := imx8mp-toradex-smarc-dev.dtb imx8mp-toradex-smarc-dsi-to-hdmi.dtbo
imx8mp-toradex-smarc-dev-panel-cap-touch-10inch-lvds-dtbs := imx8mp-toradex-smarc-dev.dtb \
imx8mp-toradex-smarc-panel-cap-touch-10inch-lvds.dtbo
diff --git a/arch/arm64/boot/dts/freescale/imx8mp-toradex-smarc-adapter-panel-cap-touch-7inch-dsi.dtso b/arch/arm64/boot/dts/freescale/imx8mp-toradex-smarc-adapter-panel-cap-touch-7inch-dsi.dtso
new file mode 100644
index 000000000000..bbf945997703
--- /dev/null
+++ b/arch/arm64/boot/dts/freescale/imx8mp-toradex-smarc-adapter-panel-cap-touch-7inch-dsi.dtso
@@ -0,0 +1,124 @@
+// SPDX-License-Identifier: GPL-2.0-only OR MIT
+/*
+ * Copyright (c) Toradex
+ *
+ * Toradex Capacitive Touch Display 7" DSI connected via Toradex SMARC
+ * Development Board DSI connector J44 through the Toradex DSI Display
+ * Adapter. Open J95 to select the carrier DSI route.
+ *
+ * https://developer.toradex.com/hardware/accessories/displays/capacitive-touch-display-7inch-dsi
+ * https://www.toradex.com/accessories/capacitive-touch-display-7-inch-dsi
+ * https://developer.toradex.com/hardware/accessories/add-ons/dsi-display-adapter
+ * https://www.toradex.com/accessories/verdin-dsi-display-adapter
+ */
+
+/dts-v1/;
+/plugin/;
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/interrupt-controller/irq.h>
+
+&{/} {
+ backlight_lcd1: backlight-lcd1 {
+ compatible = "pwm-backlight";
+ brightness-levels = <0 45 63 88 119 158 203 255>;
+ default-brightness-level = <4>;
+ /* SMARC LCD1_BKLT_PWM (SMARC S122) */
+ pwms = <&pwm1 0 6666667 0>;
+ };
+
+ panel-lvds-bridge {
+ compatible = "riverdi,rvt70hslnwca0", "panel-lvds";
+ backlight = <&backlight_lcd1>;
+ data-mapping = "vesa-24";
+ height-mm = <86>;
+ width-mm = <154>;
+
+ /*
+ * Use a combined horizontal sync and back porch of 160 pixels.
+ * Treating the panel data sheet's 160-pixel back porch separately
+ * from the sync pulse results in unstable display output with the
+ * i.MX8M Plus DSI display pipeline.
+ */
+ panel-timing {
+ clock-frequency = <51200000>;
+ de-active = <1>;
+ hactive = <1024>;
+ hback-porch = <100 100 100>;
+ hfront-porch = <16 160 216>;
+ hsync-active = <0>;
+ hsync-len = <50 60 140>;
+ pixelclk-active = <1>;
+ vactive = <600>;
+ vback-porch = <23 23 23>;
+ vfront-porch = <1 12 126>;
+ vsync-active = <0>;
+ vsync-len = <1 10 20>;
+ };
+
+ port {
+ panel_lvds_bridge_in: endpoint {
+ remote-endpoint = <&dsi_lvds_bridge_out>;
+ };
+ };
+ };
+};
+
+/* I2C on DSI Connector Pins 52/54 */
+&i2c_dsi_1 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ bridge@2c {
+ compatible = "ti,sn65dsi83";
+ reg = <0x2c>;
+ /* SMARC LCD1_BKLT_EN (SMARC S107) */
+ enable-gpios = <&som_gpio_expander 7 GPIO_ACTIVE_HIGH>;
+ vcc-supply = <&reg_carrier_1p8v>;
+
+ ports {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ port@0 {
+ reg = <0>;
+
+ dsi_lvds_bridge_in: endpoint {
+ data-lanes = <1 2 3 4>;
+ remote-endpoint = <&mipi_dsi_out>;
+ };
+ };
+
+ port@2 {
+ reg = <2>;
+
+ dsi_lvds_bridge_out: endpoint {
+ remote-endpoint = <&panel_lvds_bridge_in>;
+ };
+ };
+ };
+ };
+
+ touchscreen@41 {
+ compatible = "ilitek,ili2132";
+ reg = <0x41>;
+ /* SMARC GPIO8 (SMARC P116) - DSI_INT# */
+ /* Rising edge avoids spurious interrupts from the noisy falling edge. */
+ interrupt-parent = <&gpio1>;
+ interrupts = <1 IRQ_TYPE_EDGE_RISING>;
+ };
+};
+
+&lcdif1 {
+ status = "okay";
+};
+
+&mipi_dsi {
+ samsung,esc-clock-frequency = <16000000>;
+
+ status = "okay";
+};
+
+&mipi_dsi_out {
+ remote-endpoint = <&dsi_lvds_bridge_in>;
+};

--
2.43.0