[PATCH v3 3/3] arm64: dts: qcom: qcs6490-rb3gen2: Add LVDS display overlay
From: Vishnu Saini <hidden>
Date: 2026-09-05 01:30:41
Also in:
linux-arm-msm, lkml
Subsystem:
arm/qualcomm mailing list, arm/qualcomm support, the rest · Maintainers:
Bjorn Andersson, Konrad Dybcio, Linus Torvalds
The QCS6490 RB3 Gen2 industrial mezzanine supports LVDS display output using the Lontium LT9211C DSI-to-LVDS bridge as an alternative to the default HDMI output via the LT9611UXC bridge. Add a DTBO overlay, qcs6490-rb3gen2-industrial-mezzanine-lvds-boe,dv215fhm-r01.dtso, that disables HDMI (hdmi-connector and lt9611_codec) and wires up the LT9211C bridge on I2C1 (address 0x29) with reset on GPIO117. The overlay adds a dual-channel panel-lvds node for the boe,dv215fhm-r01 panel, matched against the panel-simple-lvds-dual-ports binding which supplies the panel's size and timing internally. The overlay is built as a composite DTB combining the base qcs6490-rb3gen2.dtb, the industrial mezzanine overlay, and this LVDS overlay. Signed-off-by: Vishnu Saini <redacted> --- arch/arm64/boot/dts/qcom/Makefile | 6 ++ ...industrial-mezzanine-lvds-boe,dv215fhm-r01.dtso | 106 +++++++++++++++++++++ 2 files changed, 112 insertions(+)
diff --git a/arch/arm64/boot/dts/qcom/Makefile b/arch/arm64/boot/dts/qcom/Makefile
index 8cf82e7067e2..d3c09bb4d1a9 100644
--- a/arch/arm64/boot/dts/qcom/Makefile
+++ b/arch/arm64/boot/dts/qcom/Makefile@@ -196,6 +196,12 @@ qcs6490-rb3gen2-vision-mezzanine-dtbs := qcs6490-rb3gen2.dtb qcs6490-rb3gen2-vis qcs6490-rb3gen2-industrial-mezzanine-dtbs := qcs6490-rb3gen2.dtb qcs6490-rb3gen2-industrial-mezzanine.dtbo dtb-$(CONFIG_ARCH_QCOM) += qcs6490-rb3gen2-industrial-mezzanine.dtb + +qcs6490-rb3gen2-industrial-mezzanine-lvds-boe,dv215fhm-r01-dtbs := \ + qcs6490-rb3gen2.dtb qcs6490-rb3gen2-industrial-mezzanine.dtbo \ + qcs6490-rb3gen2-industrial-mezzanine-lvds-boe,dv215fhm-r01.dtbo +dtb-$(CONFIG_ARCH_QCOM) += qcs6490-rb3gen2-industrial-mezzanine-lvds-boe,dv215fhm-r01.dtb + dtb-$(CONFIG_ARCH_QCOM) += qcs6490-rb3gen2-vision-mezzanine.dtb dtb-$(CONFIG_ARCH_QCOM) += qcs6490-thundercomm-minipc-g1iot.dtb dtb-$(CONFIG_ARCH_QCOM) += qcs6490-thundercomm-rubikpi3.dtb
diff --git a/arch/arm64/boot/dts/qcom/qcs6490-rb3gen2-industrial-mezzanine-lvds-boe,dv215fhm-r01.dtso b/arch/arm64/boot/dts/qcom/qcs6490-rb3gen2-industrial-mezzanine-lvds-boe,dv215fhm-r01.dtso
new file mode 100644
index 000000000000..5501ea09f43b
--- /dev/null
+++ b/arch/arm64/boot/dts/qcom/qcs6490-rb3gen2-industrial-mezzanine-lvds-boe,dv215fhm-r01.dtso@@ -0,0 +1,106 @@ +// SPDX-License-Identifier: BSD-3-Clause +/* + * Copyright (c) Qualcomm Technologies, Inc. and/or its subsidiaries. + */ + +/dts-v1/; +/plugin/; + +#include <dt-bindings/gpio/gpio.h> + +&{/} { + model = "Qualcomm Technologies, Inc. Industrial RB3gen2 LVDS"; + + hdmi-connector { + status = "disabled"; + }; + + panel_lvds: panel-lvds { + compatible = "boe,dv215fhm-r01"; + power-supply = <&lcd_disp_bias>; + + ports { + #address-cells = <1>; + #size-cells = <0>; + + port@0 { + reg = <0>; + dual-lvds-odd-pixels; + + panel_in_lvds_odd: endpoint { + remote-endpoint = <<9211c_out_odd>; + }; + }; + + port@1 { + reg = <1>; + dual-lvds-even-pixels; + + panel_in_lvds_even: endpoint { + remote-endpoint = <<9211c_out_even>; + }; + }; + }; + }; + + lcd_disp_bias: regulator-lcd-disp-bias { + compatible = "regulator-fixed"; + regulator-name = "lcd_disp_bias"; + regulator-min-microvolt = <5500000>; + regulator-max-microvolt = <5500000>; + vin-supply = <&vreg_l18b_1p8>; + }; +}; + +&i2c1 { + #address-cells = <1>; + #size-cells = <0>; + + status = "okay"; + + lvds_bridge: lvds-bridge@29 { + compatible = "lontium,lt9211c"; + reg = <0x29>; + reset-gpios = <&tlmm 117 GPIO_ACTIVE_HIGH>; + vccio-supply = <&vreg_l18b_1p8>; + + ports { + #address-cells = <1>; + #size-cells = <0>; + + port@0 { + reg = <0>; + + lt9211c_in: endpoint { + data-lanes = <1 2 3 4>; + remote-endpoint = <&mdss_dsi0_out>; + }; + }; + + port@2 { + reg = <2>; + + lt9211c_out_odd: endpoint { + remote-endpoint = <&panel_in_lvds_odd>; + }; + }; + + port@3 { + reg = <3>; + + lt9211c_out_even: endpoint { + remote-endpoint = <&panel_in_lvds_even>; + }; + }; + }; + }; +}; + +<9611_codec { + status = "disabled"; +}; + +&mdss_dsi0_out { + remote-endpoint = <<9211c_in>; +}; +
--
2.34.1