[PATCH v4 3/3] arm64: dts: qcom: sm6125-xiaomi-laurel-sprout: Enable MDSS and add panel

Yedaya Katsman
2026-03-14T21:46:35Z

Enable the MDSS nodes and add supplies and bindings for the Samsung S6E8FCO
DSI controller for the M1906F9 panel.

The ldo and iovcc gpio pins boot up with a current of 16 mA, but they work
fine with 2mA, so I used that.

mdss_dsi0_phy is powered by VDD_MX, see power-domains in sm6125.dtsi

Co-developed-by: Kamil Gołda <kamil.golda@protonmail.com>
Signed-off-by: Kamil Gołda <kamil.golda@protonmail.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Signed-off-by: Yedaya Katsman <yedaya.ka@gmail.com>
---
.../boot/dts/qcom/sm6125-xiaomi-laurel-sprout.dts | 94 ++++++++++++++++++++++
1 file changed, 94 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/sm6125-xiaomi-laurel-sprout.dts b/arch/arm64/boot/dts/qcom/sm6125-xiaomi-laurel-sprout.dts
index 994fb0412fcbdf5466f87a325c48b697a37b514b..9b046d21da1dc54bd851a94d0e209bf1763e865a 100644
--- a/arch/arm64/boot/dts/qcom/sm6125-xiaomi-laurel-sprout.dts
+++ b/arch/arm64/boot/dts/qcom/sm6125-xiaomi-laurel-sprout.dts
@@ -82,6 +82,33 @@ key-volume-up {
};
};

+ panel_vdd_1p8: regulator-panel-vdd {
+ compatible = "regulator-fixed";
+ regulator-name = "panel_vdd_1p8";
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <1800000>;
+ regulator-boot-on;
+ vin-supply = <&vreg_l9a>;
+
+ enable-active-high;
+ gpio = <&tlmm 26 GPIO_ACTIVE_HIGH>;
+ pinctrl-0 = <&panel_vdd_1p8_en>;
+ pinctrl-names = "default";
+ };
+
+ panel_vci_3p0: regulator-panel-vci {
+ compatible = "regulator-fixed";
+ regulator-name = "panel_vci_3p0";
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <1800000>;
+ regulator-boot-on;
+
+ enable-active-high;
+ gpio = <&tlmm 124 GPIO_ACTIVE_HIGH>;
+ pinctrl-0 = <&panel_vci_3p0_en>;
+ pinctrl-names = "default";
+ };
+
thermal-zones {
rf-pa0-thermal {
thermal-sensors = <&pm6125_adc_tm 0>;
@@ -128,6 +155,45 @@ &hsusb_phy1 {
status = "okay";
};

+&mdss {
+ status = "okay";
+};
+
+&mdss_dsi0 {
+ vdda-supply = <&vreg_l18a>;
+ status = "okay";
+
+ panel@0 {
+ compatible = "samsung,s6e8fco-m1906f9";
+ reg = <0>;
+
+ reset-gpios = <&tlmm 90 GPIO_ACTIVE_LOW>;
+
+ pinctrl-0 = <&mdss_default>;
+ pinctrl-1 = <&mdss_sleep>;
+ pinctrl-names = "default", "sleep";
+
+ vdd-supply = <&panel_vdd_1p8>;
+ vci-supply = <&panel_vci_3p0>;
+
+ port {
+ panel_in: endpoint {
+ remote-endpoint = <&mdss_dsi0_out>;
+ };
+ };
+ };
+};
+
+&mdss_dsi0_out {
+ data-lanes = <0 1 2 3>;
+ remote-endpoint = <&panel_in>;
+};
+
+
+&mdss_dsi0_phy {
+ status = "okay";
+};
+
&pm6125_adc {
pinctrl-names = "default";
pinctrl-0 = <&camera_flash_therm &emmc_ufs_therm>;
@@ -387,6 +453,34 @@ &sdhc_2 {

&tlmm {
gpio-reserved-ranges = <22 2>, <28 6>;
+
+ panel_vdd_1p8_en: panel-vdd-default-state {
+ pins = "gpio26";
+ function = "gpio";
+ drive-strength = <2>;
+ bias-pull-up;
+ };
+
+ mdss_default: mdss-default-state {
+ pins = "gpio90";
+ function = "gpio";
+ drive-strength = <8>;
+ bias-disable;
+ };
+
+ mdss_sleep: mdss-sleep-state {
+ pins = "gpio90";
+ function = "gpio";
+ drive-strength = <2>;
+ bias-pull-down;
+ };
+
+ panel_vci_3p0_en: panel-vci-default-state {
+ pins = "gpio124";
+ function = "gpio";
+ drive-strength = <2>;
+ bias-pull-up;
+ };
};

&ufs_mem_hc {

--
2.53.0