[PATCH v2 0/3] arm64: dts: qcom: Add LVDS display overlays for lemans, monaco and rb3gen2

[PATCH v2 0/3] arm64: dts: qcom: Add LVDS display overlays for lemans, monaco and rb3gen2

[Vishnu Saini]

This series adds LVDS display support via device tree overlays for three
Qualcomm platforms: SA8775P Lemans EVK, SA8295P/QCS8300 Monaco EVK, and
QCS6490 RB3 Gen2 industrial mezzanine.

All three platforms use the Lontium LT9211C DSI-to-LVDS bridge chip, which
converts DSI output to dual-channel LVDS for driving 1920x1080 panels.
The overlays follow the established composite-DTB pattern already in use
on these platforms (IFP mezzanine, camera, el2) and are structured to be
applied on top of the existing IFP mezzanine overlay.

Each overlay:
  - Wires the LT9211C bridge to the DSI output via an I2C node
  - Defines a generic dual-channel panel-lvds node with VESA-24 mapping
    targeting a 1920x1080 (476x268mm) panel at 148.5 MHz pixel clock
  - Provides an LCD bias regulator through the GPIO expander

This series depends on:
  [PATCH v6 0/2] This series adds LT9211C bridge driver by extending LT9211
  https://lore.kernel.org/all/20260719-add-lt9211c-bridge-v6-0-e56d22152586@oss.qualcomm.com/

which adds lontium,lt9211c compatible support to the lontium-lt9211 driver
and extends the binding YAML accordingly, and:

  [PATCH v2 0/2] This series adds BOE DV215FHM-R01 LVDS panel support
  https://lore.kernel.org/all/20260810-b4-lvds-panel-doc-v2-0-f2c2fe309989@oss.qualcomm.com/

which documents the boe,dv215fhm-r01 panel and add timings used by these overlays.

Signed-off-by: Vishnu Saini <vishnu.saini@oss.qualcomm.com>
---
Changes in v2:
- Updated overlays to make them compatable with panel-simple-lvds-dual-ports.yaml [Rob (in panel series)]
- Added Empty lines before the status property  [Dmitry]
- Link to v1: https://lore.kernel.org/r/20260719-lvds-support-v1-0-1f1aca3213ba@oss.qualcomm.com

---
Vishnu Saini (3):
      arm64: dts: qcom: lemans-evk: Add LVDS display overlay
      arm64: dts: qcom: monaco-evk: Add LVDS display overlay
      arm64: dts: qcom: qcs6490-rb3gen2: Add LVDS display overlay

 arch/arm64/boot/dts/qcom/Makefile                  |  14 +++
 .../dts/qcom/lemans-evk-lvds-boe,dv215fhm-r01.dtso | 116 ++++++++++++++++++++
 .../dts/qcom/monaco-evk-lvds-boe,dv215fhm-r01.dtso | 117 +++++++++++++++++++++
 ...industrial-mezzanine-lvds-boe,dv215fhm-r01.dtso | 105 ++++++++++++++++++
 4 files changed, 352 insertions(+)
---
base-commit: f86573e68e56a7df7d54eb58101ac413ba731996
change-id: 20260708-lvds-support-2d40d60654f1
prerequisite-message-id: <20260719-add-lt9211c-bridge-v6-0-e56d22152586@oss.qualcomm.com>
prerequisite-patch-id: dbba64d1ace696df388c5df3d1cb05a0701df194
prerequisite-patch-id: 7729b9c67a7c274b25fea08635dfede3fc604ae9
prerequisite-message-id: <20260810-b4-lvds-panel-doc-v2-0-f2c2fe309989@oss.qualcomm.com>
prerequisite-patch-id: bd3612ce053552e2ae7401a1217c4884413563f4
prerequisite-patch-id: 1d3e40bbefcb2550afd81c5cced812a1d3b943a2

Best regards,
-- 
Vishnu Saini <vishnu.saini@oss.qualcomm.com>

[PATCH v2 1/3] arm64: dts: qcom: lemans-evk: Add LVDS display overlay

[Vishnu Saini]

The Lemans EVK IFP 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, lemans-evk-lvds-boe,dv215fhm-r01.dtso, that wires
up the LT9211C bridge on I2C1 (address 0x2d) with reset on GPIO37,
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_s4a.

The overlay is built as a composite DTB combining the base
lemans-evk.dtb, the IFP mezzanine overlay, and this LVDS overlay.

Signed-off-by: Vishnu Saini <vishnu.saini@oss.qualcomm.com>
---
 arch/arm64/boot/dts/qcom/Makefile                  |   4 +
 .../dts/qcom/lemans-evk-lvds-boe,dv215fhm-r01.dtso | 116 +++++++++++++++++++++
 2 files changed, 120 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/Makefile b/arch/arm64/boot/dts/qcom/Makefile
index 5a1c56cf98f6..2c4e7a891717 100644
--- a/arch/arm64/boot/dts/qcom/Makefile
+++ b/arch/arm64/boot/dts/qcom/Makefile
@@ -55,6 +55,10 @@ 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-lvds-boe,dv215fhm-r01-dtbs := lemans-evk.dtb lemans-evk-ifp-mezzanine.dtbo lemans-evk-lvds-boe,dv215fhm-r01.dtbo
+dtb-$(CONFIG_ARCH_QCOM)	+= lemans-evk-lvds-boe,dv215fhm-r01.dtb
+
 dtb-$(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-lvds-boe,dv215fhm-r01.dtso b/arch/arm64/boot/dts/qcom/lemans-evk-lvds-boe,dv215fhm-r01.dtso
new file mode 100644
index 000000000000..82b6eeddbb8b
--- /dev/null
+++ b/arch/arm64/boot/dts/qcom/lemans-evk-lvds-boe,dv215fhm-r01.dtso
@@ -0,0 +1,116 @@
+// 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. Lemans EVK LVDS";
+
+	panel_lvds: panel-lvds {
+		compatible = "boe,dv215fhm-r01";
+		power-supply = <&lcd_disp_bias>;
+
+		status = "okay";
+
+		ports {
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			port@0 {
+				reg = <0>;
+				dual-lvds-odd-pixels;
+				panel_in_lvds_odd: endpoint {
+					remote-endpoint = <&lt9211c_out_odd>;
+				};
+			};
+
+			port@1 {
+				reg = <1>;
+				dual-lvds-even-pixels;
+				panel_in_lvds_even: endpoint {
+					remote-endpoint = <&lt9211c_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;
+	};
+};
+
+&i2c1 {
+	#address-cells = <1>;
+	#size-cells = <0>;
+	pinctrl-names = "default";
+	pinctrl-0 = <&qup_i2c1_default>;
+
+	status = "okay";
+
+	lt9211c_codec: lvds-bridge@2d {
+		compatible = "lontium,lt9211c";
+		reg = <0x2d>;
+		reset-gpios = <&tlmm 37 GPIO_ACTIVE_HIGH>;
+		vccio-supply = <&vreg_s4a>;
+
+		status = "okay";
+
+		ports {
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			port@0 {
+				reg = <0>;
+				lt9211c_in: endpoint {
+					data-lanes = <1 2 3 4>;
+					remote-endpoint = <&mdss0_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>;
+				};
+			};
+		};
+	};
+};
+
+&mdss0 {
+	status = "okay";
+};
+
+&mdss0_dsi0 {
+	vdda-supply = <&vreg_l1c>;
+
+	status = "okay";
+};
+
+&mdss0_dsi0_out {
+	data-lanes = <0 1 2 3>;
+	remote-endpoint = <&lt9211c_in>;
+};
+
+&mdss0_dsi0_phy {
+	vdds-supply = <&vreg_l4a>;
+
+	status = "okay";
+};

-- 
2.34.1

[PATCH v2 2/3] arm64: dts: qcom: monaco-evk: Add LVDS display overlay

[Vishnu Saini]

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 <vishnu.saini@oss.qualcomm.com>
---
 arch/arm64/boot/dts/qcom/Makefile                  |   4 +
 .../dts/qcom/monaco-evk-lvds-boe,dv215fhm-r01.dtso | 117 +++++++++++++++++++++
 2 files changed, 121 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/Makefile b/arch/arm64/boot/dts/qcom/Makefile
index 2c4e7a891717..85ee28d8f109 100644
--- a/arch/arm64/boot/dts/qcom/Makefile
+++ b/arch/arm64/boot/dts/qcom/Makefile
@@ -73,6 +73,10 @@ monaco-evk-el2-dtbs := monaco-evk.dtb monaco-el2.dtbo
 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..96a53a294863
--- /dev/null
+++ b/arch/arm64/boot/dts/qcom/monaco-evk-lvds-boe,dv215fhm-r01.dtso
@@ -0,0 +1,117 @@
+// 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>;
+
+		status = "okay";
+
+		ports {
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			port@0 {
+				reg = <0>;
+				dual-lvds-odd-pixels;
+				panel_in_lvds_odd: endpoint {
+					remote-endpoint = <&lt9211c_out_odd>;
+				};
+			};
+
+			port@1 {
+				reg = <1>;
+				dual-lvds-even-pixels;
+				panel_in_lvds_even: endpoint {
+					remote-endpoint = <&lt9211c_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>;
+
+		status = "okay";
+
+		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 {
+	status = "okay";
+};
+
+&mdss_dsi0 {
+	vdda-supply = <&vreg_l5a>;
+
+	status = "okay";
+};
+
+&mdss_dsi0_out {
+	data-lanes = <0 1 2 3>;
+	remote-endpoint = <&lt9211c_in>;
+};
+
+&mdss_dsi0_phy {
+	vdds-supply = <&vreg_l4a>;
+
+	status = "okay";
+};
+

-- 
2.34.1

[PATCH v2 3/3] arm64: dts: qcom: qcs6490-rb3gen2: Add LVDS display overlay

[Vishnu Saini]

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 <vishnu.saini@oss.qualcomm.com>
---
 arch/arm64/boot/dts/qcom/Makefile                  |   6 ++
 ...industrial-mezzanine-lvds-boe,dv215fhm-r01.dtso | 105 +++++++++++++++++++++
 2 files changed, 111 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/Makefile b/arch/arm64/boot/dts/qcom/Makefile
index 85ee28d8f109..8b147cbc0e1e 100644
--- a/arch/arm64/boot/dts/qcom/Makefile
+++ b/arch/arm64/boot/dts/qcom/Makefile
@@ -189,6 +189,12 @@ 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..8e60b8631169
--- /dev/null
+++ b/arch/arm64/boot/dts/qcom/qcs6490-rb3gen2-industrial-mezzanine-lvds-boe,dv215fhm-r01.dtso
@@ -0,0 +1,105 @@
+// 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>;
+
+		status = "okay";
+
+		ports {
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			port@0 {
+				reg = <0>;
+				dual-lvds-odd-pixels;
+				panel_in_lvds_odd: endpoint {
+					remote-endpoint = <&lt9211c_out_odd>;
+				};
+			};
+
+			port@1 {
+				reg = <1>;
+				dual-lvds-even-pixels;
+				panel_in_lvds_even: endpoint {
+					remote-endpoint = <&lt9211c_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>;
+
+		status = "okay";
+
+		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>;
+				};
+			};
+		};
+	};
+};
+
+&lt9611_codec {
+	status = "disabled";
+};
+
+&mdss_dsi0_out {
+	remote-endpoint = <&lt9211c_in>;
+};
+

-- 
2.34.1

Re: [PATCH v2 1/3] arm64: dts: qcom: lemans-evk: Add LVDS display overlay

[Konrad Dybcio]

On 8/13/26 7:33 PM, Vishnu Saini wrote:
> The Lemans EVK IFP 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, lemans-evk-lvds-boe,dv215fhm-r01.dtso, that wires
> up the LT9211C bridge on I2C1 (address 0x2d) with reset on GPIO37,
> 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_s4a.
> 
> The overlay is built as a composite DTB combining the base
> lemans-evk.dtb, the IFP mezzanine overlay, and this LVDS overlay.
> 
> Signed-off-by: Vishnu Saini <vishnu.saini@oss.qualcomm.com>
> ---

[...]

> +	panel_lvds: panel-lvds {
> +		compatible = "boe,dv215fhm-r01";
> +		power-supply = <&lcd_disp_bias>;
> +
> +		status = "okay";

Nodes are enabled by default unless explicitly disabled

> +
> +		ports {
> +			#address-cells = <1>;
> +			#size-cells = <0>;
> +
> +			port@0 {
> +				reg = <0>;
> +				dual-lvds-odd-pixels;
> +				panel_in_lvds_odd: endpoint {

Please keep a \n between the last property and the following subnodes

[...]

> +	lt9211c_codec: lvds-bridge@2d {
> +		compatible = "lontium,lt9211c";
> +		reg = <0x2d>;
> +		reset-gpios = <&tlmm 37 GPIO_ACTIVE_HIGH>;
> +		vccio-supply = <&vreg_s4a>;
> +
> +		status = "okay";

ditto

[...]

> +&mdss0 {
> +	status = "okay";
> +};

The DT which you overlay this atop already enables it

Konrad

> +
> +&mdss0_dsi0 {
> +	vdda-supply = <&vreg_l1c>;
> +
> +	status = "okay";
> +};
> +
> +&mdss0_dsi0_out {
> +	data-lanes = <0 1 2 3>;
> +	remote-endpoint = <&lt9211c_in>;
> +};
> +
> +&mdss0_dsi0_phy {
> +	vdds-supply = <&vreg_l4a>;
> +
> +	status = "okay";
> +};
> 

Re: [PATCH v2 2/3] arm64: dts: qcom: monaco-evk: Add LVDS display overlay

[Konrad Dybcio]

On 8/13/26 7:33 PM, Vishnu Saini wrote:
> 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 <vishnu.saini@oss.qualcomm.com>
> ---

Same comments as patch 1 for patches 2 and 3

Konrad

Re: [PATCH v2 1/3] arm64: dts: qcom: lemans-evk: Add LVDS display overlay

[Vishnu Saini]

On Thu, Sep 03, 2026 at 03:06:10PM +0200, Konrad Dybcio wrote:
> On 8/13/26 7:33 PM, Vishnu Saini wrote:
> > The Lemans EVK IFP 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, lemans-evk-lvds-boe,dv215fhm-r01.dtso, that wires
> > up the LT9211C bridge on I2C1 (address 0x2d) with reset on GPIO37,
> > 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_s4a.
> > 
> > The overlay is built as a composite DTB combining the base
> > lemans-evk.dtb, the IFP mezzanine overlay, and this LVDS overlay.
> > 
> > Signed-off-by: Vishnu Saini <vishnu.saini@oss.qualcomm.com>
> > ---
> 
> [...]
> 
> > +	panel_lvds: panel-lvds {
> > +		compatible = "boe,dv215fhm-r01";
> > +		power-supply = <&lcd_disp_bias>;
> > +
> > +		status = "okay";
> 
> Nodes are enabled by default unless explicitly disabled
Yes, status = "okay"; will be removed in next revision from all such instances.
> > +
> > +		ports {
> > +			#address-cells = <1>;
> > +			#size-cells = <0>;
> > +
> > +			port@0 {
> > +				reg = <0>;
> > +				dual-lvds-odd-pixels;
> > +				panel_in_lvds_odd: endpoint {
> 
> Please keep a \n between the last property and the following subnodes
Yes, This will be fixed at all the places in next revision.
> [...]
> 
> > +	lt9211c_codec: lvds-bridge@2d {
> > +		compatible = "lontium,lt9211c";
> > +		reg = <0x2d>;
> > +		reset-gpios = <&tlmm 37 GPIO_ACTIVE_HIGH>;
> > +		vccio-supply = <&vreg_s4a>;
> > +
> > +		status = "okay";
> 
> ditto
> 
> [...]
> 
> > +&mdss0 {
> > +	status = "okay";
> > +};
> 
> The DT which you overlay this atop already enables it
Yes, will remove this from overlay.
> Konrad
> 
> > +
> > +&mdss0_dsi0 {
> > +	vdda-supply = <&vreg_l1c>;
> > +
> > +	status = "okay";
> > +};
> > +
> > +&mdss0_dsi0_out {
> > +	data-lanes = <0 1 2 3>;
> > +	remote-endpoint = <&lt9211c_in>;
> > +};
> > +
> > +&mdss0_dsi0_phy {
> > +	vdds-supply = <&vreg_l4a>;
> > +
> > +	status = "okay";
> > +};
> >