[PATCH 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 a 1920x1080 panel with VESA-24 mapping and
148.5 MHz pixel clock.

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@xxxxxxxxxxxxxxxx>
---
 arch/arm64/boot/dts/qcom/Makefile                  |   4 +
 ...industrial-mezzanine-lvds-boe,dv215fhm-r01.dtso | 110 +++++++++++++++++++++
 2 files changed, 114 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/Makefile b/arch/arm64/boot/dts/qcom/Makefile
index 85ee28d8f109..bd8db14c5acf 100644
--- a/arch/arm64/boot/dts/qcom/Makefile
+++ b/arch/arm64/boot/dts/qcom/Makefile
@@ -189,6 +189,10 @@ 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..65af68850342
--- /dev/null
+++ b/arch/arm64/boot/dts/qcom/qcs6490-rb3gen2-industrial-mezzanine-lvds-boe,dv215fhm-r01.dtso
@@ -0,0 +1,110 @@
+// 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. rb3gen2 industrial mezzanine lvds";
+
+	hdmi-connector {
+		status = "disabled";
+	};
+
+	panel_lvds: panel-lvds {
+		compatible = "boe,dv215fhm-r01", "panel-lvds";
+		data-mapping = "vesa-24";
+		width-mm = <476>;
+		height-mm = <268>;
+
+		status = "okay";
+
+		panel-timing {
+			clock-frequency = <148500000>;
+			hactive = <1920>;
+			vactive = <1080>;
+			hfront-porch = <88>;
+			hback-porch = <148>;
+			hsync-len = <44>;
+			vfront-porch = <4>;
+			vback-porch = <36>;
+			vsync-len = <5>;
+			de-active = <1>;
+		};
+
+		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>;
+				};
+			};
+		};
+	};
+};
+
+&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_l1c_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