[PATCH v2 2/2] arm64: dts: qcom: lemans-evk: Add Raspberry Pi 7-inch DSI panel overlay
From: Shashank Maurya <hidden>
Date: 2026-09-07 06:34:30
Also in:
linux-arm-kernel, linux-arm-msm, lkml
Subsystem:
arm/qualcomm mailing list, arm/qualcomm support, the rest · Maintainers:
Bjorn Andersson, Konrad Dybcio, Linus Torvalds
Add a DT overlay for the Raspberry Pi 7" DSI touchscreen panel on Lemans EVK, using mdss0_dsi0 with 2 data lanes and the panel MCU on I2C1. Signed-off-by: Shashank Maurya <redacted> --- arch/arm64/boot/dts/qcom/Makefile | 2 + .../dts/qcom/lemans-evk-raspberrypi-dsi-7inch.dtso | 83 ++++++++++++++++++++++ 2 files changed, 85 insertions(+)
diff --git a/arch/arm64/boot/dts/qcom/Makefile b/arch/arm64/boot/dts/qcom/Makefile
index 38554195fc98..d17b46a043ad 100644
--- a/arch/arm64/boot/dts/qcom/Makefile
+++ b/arch/arm64/boot/dts/qcom/Makefile@@ -57,6 +57,8 @@ lemans-evk-el2-dtbs := lemans-evk.dtb lemans-el2.dtbo dtb-$(CONFIG_ARCH_QCOM) += lemans-evk-el2.dtb lemans-evk-ifp-mezzanine-dtbs := lemans-evk.dtb lemans-evk-ifp-mezzanine.dtbo dtb-$(CONFIG_ARCH_QCOM) += lemans-evk-ifp-mezzanine.dtb +lemans-evk-raspberrypi-dsi-7inch-dtbs := lemans-evk.dtb lemans-evk-raspberrypi-dsi-7inch.dtbo +dtb-$(CONFIG_ARCH_QCOM) += lemans-evk-raspberrypi-dsi-7inch.dtb dtb-$(CONFIG_ARCH_QCOM) += mahua-crd.dtb dtb-$(CONFIG_ARCH_QCOM) += milos-fairphone-fp6.dtb dtb-$(CONFIG_ARCH_QCOM) += milos-nothing-asteroids.dtb
diff --git a/arch/arm64/boot/dts/qcom/lemans-evk-raspberrypi-dsi-7inch.dtso b/arch/arm64/boot/dts/qcom/lemans-evk-raspberrypi-dsi-7inch.dtso
new file mode 100644
index 000000000000..14743b3c3863
--- /dev/null
+++ b/arch/arm64/boot/dts/qcom/lemans-evk-raspberrypi-dsi-7inch.dtso@@ -0,0 +1,83 @@ +// SPDX-License-Identifier: BSD-3-Clause +/* + * Copyright (c) Qualcomm Technologies, Inc. and/or its subsidiaries. + */ +/dts-v1/; +/plugin/; + +#include <dt-bindings/gpio/gpio.h> + +&{/} { + display_bl: backlight { + compatible = "pwm-backlight"; + power-supply = <®_dsi_touch>; + pwms = <®_backlight 0 255 0>; + }; + + reg_dsi_touch: regulator-touch { + compatible = "regulator-fixed"; + regulator-name = "rpi-dsi-touch"; + regulator-min-microvolt = <3300000>; + regulator-max-microvolt = <3300000>; + gpio = <&expander3 1 GPIO_ACTIVE_HIGH>; + enable-active-high; + regulator-boot-on; + regulator-always-on; + }; +}; + +&i2c1 { + qcom,load-firmware; + qcom,xfer-mode = <1>; + + status = "okay"; + + #address-cells = <1>; + #size-cells = <0>; + + reg_backlight: reg_backlight@45 { + compatible = "raspberrypi,touchscreen-panel-regulator-v2"; + reg = <0x45>; + + vcc-supply = <®_dsi_touch>; + gpio-controller; + #gpio-cells = <2>; + #pwm-cells = <3>; + }; +}; + +&mdss0_dsi0 { + vdda-supply = <&vreg_l1c>; + + status = "okay"; + + #address-cells = <1>; + #size-cells = <0>; + + panel@0 { + compatible = "raspberrypi,dsi-7inch"; + reg = <0>; + + reset-gpios = <®_backlight 0 GPIO_ACTIVE_LOW>; + power-supply = <®_dsi_touch>; + iovcc-supply = <®_dsi_touch>; + backlight = <&display_bl>; + + port { + panel0_in: endpoint { + remote-endpoint = <&mdss0_dsi0_out>; + }; + }; + }; +}; + +&mdss0_dsi0_out { + remote-endpoint = <&panel0_in>; + data-lanes = <0 1>; +}; + +&mdss0_dsi0_phy { + vdds-supply = <&vreg_l4a>; + + status = "okay"; +};
--
2.34.1