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

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 <[email protected]>
---
 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