From: Vladimir Zapolskiy <vladimir.zapolskiy@linaro.org>
Date: Wed, 11 Mar 2026 00:12:38 +0000 (+0200)
Subject: arm64: dts: qcom: sm8550-hdk: add support for the Display Card overlay
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=40c15162c873a481cb0e57f8aaa743a4bc66432f;p=thirdparty%2Fkernel%2Flinux.git

arm64: dts: qcom: sm8550-hdk: add support for the Display Card overlay

The SM8550-HDK board may be connected to a Display Card external PCB,
which is identical to the already supported SM8650-HDK Display Card,
it provides a VTDR6130 display with Goodix Berlin Touch controller, see
also commit bc90f56a1699 ("arm64: dts: sm8650-hdk: add support for the
Display Card overlay") for additional details.

Two overlays are added to support SM8550-HDK plus Display Card and
SM8550-HDK plus Display Card plus Rear Camera Card setups.

Signed-off-by: Vladimir Zapolskiy <vladimir.zapolskiy@linaro.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20260311001238.4191034-1-vladimir.zapolskiy@linaro.org
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
---

diff --git a/arch/arm64/boot/dts/qcom/Makefile b/arch/arm64/boot/dts/qcom/Makefile
index c2b0f27343951..91b7236a21905 100644
--- a/arch/arm64/boot/dts/qcom/Makefile
+++ b/arch/arm64/boot/dts/qcom/Makefile
@@ -361,8 +361,12 @@ dtb-$(CONFIG_ARCH_QCOM)	+= sm8450-samsung-r0q.dtb
 dtb-$(CONFIG_ARCH_QCOM)	+= sm8450-sony-xperia-nagara-pdx223.dtb
 dtb-$(CONFIG_ARCH_QCOM)	+= sm8450-sony-xperia-nagara-pdx224.dtb
 
+sm8550-hdk-display-card-dtbs	:= sm8550-hdk.dtb sm8550-hdk-display-card.dtbo
+sm8550-hdk-display-card-rear-camera-card-dtbs	:= sm8550-hdk.dtb sm8550-hdk-display-card.dtbo sm8550-hdk-rear-camera-card.dtbo
 sm8550-hdk-rear-camera-card-dtbs	:= sm8550-hdk.dtb sm8550-hdk-rear-camera-card.dtbo
 
+dtb-$(CONFIG_ARCH_QCOM)	+= sm8550-hdk-display-card-rear-camera-card.dtb
+dtb-$(CONFIG_ARCH_QCOM)	+= sm8550-hdk-display-card.dtb
 dtb-$(CONFIG_ARCH_QCOM)	+= sm8550-hdk-rear-camera-card.dtb
 dtb-$(CONFIG_ARCH_QCOM)	+= sm8550-hdk.dtb
 dtb-$(CONFIG_ARCH_QCOM)	+= sm8550-mtp.dtb
diff --git a/arch/arm64/boot/dts/qcom/sm8550-hdk-display-card.dtso b/arch/arm64/boot/dts/qcom/sm8550-hdk-display-card.dtso
new file mode 100644
index 0000000000000..7b54b084b8bd4
--- /dev/null
+++ b/arch/arm64/boot/dts/qcom/sm8550-hdk-display-card.dtso
@@ -0,0 +1,132 @@
+// SPDX-License-Identifier: BSD-3-Clause
+/*
+ * Copyright (c) 2024-2026, Linaro Limited
+ */
+
+/*
+ * Display Card kit overlay
+ * This requires S5702 Switch 7 to be turned to OFF to route DSI0 to the display panel
+ */
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/interrupt-controller/irq.h>
+
+/dts-v1/;
+/plugin/;
+
+/* Disable HDMI bridge related nodes (mutually exclusive with the display card) */
+
+&i2c0 {
+	status = "disabled";
+};
+
+&lt9611_1v2 {
+	status = "disabled";
+};
+
+&lt9611_3v3 {
+	status = "disabled";
+};
+
+&vreg_bob_3v3 {
+	status = "disabled";
+};
+
+&lt9611_codec {
+	status = "disabled";
+};
+
+&mdss_dsi0 {
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	panel@0 {
+		compatible = "visionox,vtdr6130";
+		reg = <0>;
+
+		reset-gpios = <&tlmm 133 GPIO_ACTIVE_LOW>;
+
+		vddio-supply = <&vreg_l12b_1p8>;
+		vci-supply = <&vreg_l13b_3p0>;
+		vdd-supply = <&vreg_l11b_1p2>;
+
+		pinctrl-0 = <&disp0_reset_n_active>, <&mdp_vsync>;
+		pinctrl-1 = <&disp0_reset_n_suspend>, <&mdp_vsync>;
+		pinctrl-names = "default", "sleep";
+
+		port {
+			panel0_in: endpoint {
+				remote-endpoint = <&mdss_dsi0_out>;
+			};
+		};
+	};
+};
+
+&mdss_dsi0_out {
+	remote-endpoint = <&panel0_in>;
+};
+
+&spi4 {
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	status = "okay";
+
+	touchscreen@0 {
+		compatible = "goodix,gt9916";
+		reg = <0>;
+
+		interrupt-parent = <&tlmm>;
+		interrupts = <25 IRQ_TYPE_LEVEL_LOW>;
+
+		reset-gpios = <&tlmm 24 GPIO_ACTIVE_LOW>;
+
+		avdd-supply = <&vreg_l14b_3p2>;
+
+		spi-max-frequency = <1000000>;
+
+		touchscreen-size-x = <1080>;
+		touchscreen-size-y = <2400>;
+
+		pinctrl-0 = <&ts_irq>, <&ts_reset>;
+		pinctrl-names = "default";
+	};
+};
+
+&tlmm {
+	disp0_reset_n_active: disp0-reset-n-active-state {
+		pins = "gpio133";
+		function = "gpio";
+		drive-strength = <8>;
+		bias-disable;
+	};
+
+	disp0_reset_n_suspend: disp0-reset-n-suspend-state {
+		pins = "gpio133";
+		function = "gpio";
+		drive-strength = <2>;
+		bias-pull-down;
+	};
+
+	mdp_vsync: mdp-vsync-state {
+		pins = "gpio86";
+		function = "mdp_vsync";
+		drive-strength = <2>;
+		bias-pull-down;
+	};
+
+	ts_irq: ts-irq-state {
+		pins = "gpio25";
+		function = "gpio";
+		drive-strength = <8>;
+		bias-pull-up;
+		output-disable;
+	};
+
+	ts_reset: ts-reset-state {
+		pins = "gpio24";
+		function = "gpio";
+		drive-strength = <8>;
+		bias-pull-up;
+	};
+};