[PATCH v3 2/3] arm64: dts: qcom: monaco-evk: Add LVDS display overlay
From: Vishnu Saini <hidden>
Date: 2026-09-05 01:30:36
Also in:
linux-arm-msm, lkml
Subsystem:
arm/qualcomm mailing list, arm/qualcomm support, the rest · Maintainers:
Bjorn Andersson, Konrad Dybcio, Linus Torvalds
The Monaco-EVK mezzanine supports LVDS display output using the Lontium LT9211C DSI-to-LVDS bridge. The bridge is connected to the DSI0 output and drives a dual-channel 1920x1080 LVDS panel in VESA-24 mapping. Add a DTBO overlay, monaco-evk-lvds-boe,dv215fhm-r01.dtso, that wires up the LT9211C bridge on I2C8 (address 0x2d) with reset on GPIO66, a 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), and an LCD display bias regulator supplied through the GPIO expander. DSI power is provided by vreg_l5a. The overlay is built as a composite DTB combining the base monaco-evk.dtb, the IFP mezzanine overlay, and this LVDS overlay. Signed-off-by: Vishnu Saini <redacted> --- arch/arm64/boot/dts/qcom/Makefile | 4 + .../dts/qcom/monaco-evk-lvds-boe,dv215fhm-r01.dtso | 114 +++++++++++++++++++++ 2 files changed, 118 insertions(+)
diff --git a/arch/arm64/boot/dts/qcom/Makefile b/arch/arm64/boot/dts/qcom/Makefile
index 6c119fd77774..8cf82e7067e2 100644
--- a/arch/arm64/boot/dts/qcom/Makefile
+++ b/arch/arm64/boot/dts/qcom/Makefile@@ -80,6 +80,10 @@ dtb-$(CONFIG_ARCH_QCOM) += monaco-ac-evk-ifp-mezzanine.dtb dtb-$(CONFIG_ARCH_QCOM) += monaco-evk-el2.dtb monaco-evk-ifp-mezzanine-dtbs := monaco-evk.dtb monaco-evk-ifp-mezzanine.dtbo dtb-$(CONFIG_ARCH_QCOM) += monaco-evk-ifp-mezzanine.dtb + +monaco-evk-lvds-boe,dv215fhm-r01-dtbs := monaco-evk.dtb monaco-evk-ifp-mezzanine.dtbo monaco-evk-lvds-boe,dv215fhm-r01.dtbo +dtb-$(CONFIG_ARCH_QCOM) += monaco-evk-lvds-boe,dv215fhm-r01.dtb + dtb-$(CONFIG_ARCH_QCOM) += msm8216-samsung-fortuna3g.dtb dtb-$(CONFIG_ARCH_QCOM) += msm8916-acer-a1-724.dtb dtb-$(CONFIG_ARCH_QCOM) += msm8916-alcatel-idol347.dtb
diff --git a/arch/arm64/boot/dts/qcom/monaco-evk-lvds-boe,dv215fhm-r01.dtso b/arch/arm64/boot/dts/qcom/monaco-evk-lvds-boe,dv215fhm-r01.dtso
new file mode 100644
index 000000000000..b796df28037b
--- /dev/null
+++ b/arch/arm64/boot/dts/qcom/monaco-evk-lvds-boe,dv215fhm-r01.dtso@@ -0,0 +1,114 @@ +// 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. Monaco EVK LVDS"; + + 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>; + gpio = <&expander3 1 GPIO_ACTIVE_HIGH>; + enable-active-high; + }; +}; + +&i2c8 { + #address-cells = <1>; + #size-cells = <0>; + pinctrl-names = "default"; + pinctrl-0 = <&qup_i2c8_data_clk>; + + status = "okay"; + + lt9211c_codec: lvds-bridge@2d { + compatible = "lontium,lt9211c"; + reg = <0x2d>; + reset-gpios = <&tlmm 66 GPIO_ACTIVE_HIGH>; + vccio-supply = <&vreg_l5a>; + + 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>; + }; + }; + }; + }; +}; + +&mdss_dsi0 { + vdda-supply = <&vreg_l5a>; + + status = "okay"; +}; + +&mdss_dsi0_out { + data-lanes = <0 1 2 3>; + remote-endpoint = <<9211c_in>; +}; + +&mdss_dsi0_phy { + vdds-supply = <&vreg_l4a>; + + status = "okay"; +}; +
--
2.34.1