From: Hugo Villeneuve <hvilleneuve@dimonoff.com>

Add support for the LD configuration option (LVDS encoder assembled on SOM)
so that the LVDS display panel on the concerto EVK board now works
properly.

Not all VAR-SOM-6UL SOMs have the LD configuration optionso factor out this
functionality to a separate DTSI file.

Signed-off-by: Hugo Villeneuve <hvilleneuve@dimonoff.com>
---
 .../imx/imx6ul-var-som-concerto-common.dtsi   |  35 ++++--
 .../nxp/imx/imx6ul-var-som-concerto-full.dts  |   1 +
 .../dts/nxp/imx/imx6ul-var-som-concerto.dts   |   1 +
 .../nxp/imx/imx6ul-var-som-lvds-panel.dtsi    | 112 ++++++++++++++++++
 .../nxp/imx/imx6ull-var-som-concerto-full.dts |   1 +
 .../dts/nxp/imx/imx6ull-var-som-concerto.dts  |   1 +
 6 files changed, 139 insertions(+), 12 deletions(-)
 create mode 100644 arch/arm/boot/dts/nxp/imx/imx6ul-var-som-lvds-panel.dtsi

diff --git a/arch/arm/boot/dts/nxp/imx/imx6ul-var-som-concerto-common.dtsi b/arch/arm/boot/dts/nxp/imx/imx6ul-var-som-concerto-common.dtsi
index 107b1d0fe7827..658cec2f4d026 100644
--- a/arch/arm/boot/dts/nxp/imx/imx6ul-var-som-concerto-common.dtsi
+++ b/arch/arm/boot/dts/nxp/imx/imx6ul-var-som-concerto-common.dtsi
@@ -44,6 +44,29 @@ led-0 {
 			linux,default-trigger = "heartbeat";
 		};
 	};
+
+	lvds_panel: lvds-panel {
+		compatible = "sgd,gktw70sdae4se", "panel-lvds";
+		data-mapping = "jeida-18";
+		width-mm = <153>;
+		height-mm = <86>;
+
+		panel-timing {
+			clock-frequency = <35000000>;
+			hactive = <800>;
+			vactive = <480>;
+			hback-porch = <40>;
+			hfront-porch = <40>;
+			vback-porch = <29>;
+			vfront-porch = <13>;
+			hsync-len = <48>;
+			vsync-len = <3>;
+			hsync-active = <0>;
+			vsync-active = <0>;
+			de-active = <1>;
+			pixelclk-active = <0>;
+		};
+	};
 };
 
 &can1 {
@@ -98,12 +121,6 @@ MX6UL_PAD_UART3_RX_DATA__GPIO1_IO25	0x1b0b0	/* GPLED2 */
 		>;
 	};
 
-	pinctrl_pwm4: pwm4grp {
-		fsl,pins = <
-			MX6UL_PAD_GPIO1_IO05__PWM4_OUT		0x110b0
-		>;
-	};
-
 	pinctrl_rtc: rtcgrp {
 		fsl,pins = <
 			MX6UL_PAD_JTAG_MOD__GPIO1_IO10		0x1b0b0 /* RTC alarm IRQ */
@@ -139,12 +156,6 @@ MX6UL_PAD_GPIO1_IO01__WDOG1_WDOG_B	0x78b0
 	};
 };
 
-&pwm4 {
-	pinctrl-names = "default";
-	pinctrl-0 = <&pinctrl_pwm4>;
-	status = "okay";
-};
-
 &snvs_pwrkey {
 	status = "disabled";
 };
diff --git a/arch/arm/boot/dts/nxp/imx/imx6ul-var-som-concerto-full.dts b/arch/arm/boot/dts/nxp/imx/imx6ul-var-som-concerto-full.dts
index 64a3cbd8b7c38..725f34d6b7ee9 100644
--- a/arch/arm/boot/dts/nxp/imx/imx6ul-var-som-concerto-full.dts
+++ b/arch/arm/boot/dts/nxp/imx/imx6ul-var-som-concerto-full.dts
@@ -14,6 +14,7 @@
 #include "imx6ul-var-som-enet2.dtsi"
 #include "imx6ul-var-som-enet1.dtsi"
 #include "imx6ul-var-som-audio.dtsi"
+#include "imx6ul-var-som-lvds-panel.dtsi"
 
 / {
 	model = "Variscite VAR-SOM-6UL Concerto Board (6UL CPU)";
diff --git a/arch/arm/boot/dts/nxp/imx/imx6ul-var-som-concerto.dts b/arch/arm/boot/dts/nxp/imx/imx6ul-var-som-concerto.dts
index f014ee66e18cb..e9e4b6882bca8 100644
--- a/arch/arm/boot/dts/nxp/imx/imx6ul-var-som-concerto.dts
+++ b/arch/arm/boot/dts/nxp/imx/imx6ul-var-som-concerto.dts
@@ -14,6 +14,7 @@
 #include "imx6ul-var-som-sd.dtsi"
 #include "imx6ul-var-som-enet2.dtsi"
 #include "imx6ul-var-som-audio.dtsi"
+#include "imx6ul-var-som-lvds-panel.dtsi"
 
 / {
 	model = "Variscite VAR-SOM-6UL Concerto Board (6UL CPU)";
diff --git a/arch/arm/boot/dts/nxp/imx/imx6ul-var-som-lvds-panel.dtsi b/arch/arm/boot/dts/nxp/imx/imx6ul-var-som-lvds-panel.dtsi
new file mode 100644
index 0000000000000..996b37d35d6e0
--- /dev/null
+++ b/arch/arm/boot/dts/nxp/imx/imx6ul-var-som-lvds-panel.dtsi
@@ -0,0 +1,112 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * LVDS panel support for Variscite VAR-SOM-6UL module.
+ *
+ * Copyright 2019-2024 Variscite Ltd.
+ * Copyright 2026 Dimonoff
+ */
+
+/ {
+	lcd_backlight: lcd-backlight {
+		compatible = "pwm-backlight";
+		pwms = <&pwm4 0 2000000 0>;
+		pwm-names = "LCD_BKLT_PWM";
+		brightness-levels = <0 4 8 16 32 64 128 255>;
+		default-brightness-level = <6>;
+		status = "okay";
+	};
+
+	lvds_encoder: lvds-encoder {
+		compatible = "ti,sn75lvds93", "lvds-encoder";
+		power-supply = <&reg_3p3v>;
+
+		ports {
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			port@0 {
+				reg = <0>;
+
+				lvds_enc_in: endpoint {
+					remote-endpoint = <&lcdif_out>;
+				};
+			};
+
+			port@1 {
+				reg = <1>;
+
+				lvds_enc_out: endpoint {
+					remote-endpoint = <&lvds_panel_in>;
+				};
+			};
+		};
+	};
+};
+
+&iomuxc {
+	pinctrl_lcdif_ctrl: lcdif-ctrl-grp {
+		fsl,pins = <
+			MX6UL_PAD_LCD_CLK__LCDIF_CLK		0x79
+			MX6UL_PAD_LCD_ENABLE__LCDIF_ENABLE	0x79
+		>;
+	};
+
+	pinctrl_lcdif_dat: lcdif-dat-grp {
+		fsl,pins = <
+			MX6UL_PAD_LCD_DATA02__LCDIF_DATA02	0x79
+			MX6UL_PAD_LCD_DATA03__LCDIF_DATA03	0x79
+			MX6UL_PAD_LCD_DATA04__LCDIF_DATA04	0x79
+			MX6UL_PAD_LCD_DATA05__LCDIF_DATA05	0x79
+			MX6UL_PAD_LCD_DATA06__LCDIF_DATA06	0x79
+			MX6UL_PAD_LCD_DATA07__LCDIF_DATA07	0x79
+			MX6UL_PAD_LCD_DATA10__LCDIF_DATA10	0x79
+			MX6UL_PAD_LCD_DATA11__LCDIF_DATA11	0x79
+			MX6UL_PAD_LCD_DATA12__LCDIF_DATA12	0x79
+			MX6UL_PAD_LCD_DATA13__LCDIF_DATA13	0x79
+			MX6UL_PAD_LCD_DATA14__LCDIF_DATA14	0x79
+			MX6UL_PAD_LCD_DATA15__LCDIF_DATA15	0x79
+			MX6UL_PAD_LCD_DATA18__LCDIF_DATA18	0x79
+			MX6UL_PAD_LCD_DATA19__LCDIF_DATA19	0x79
+			MX6UL_PAD_LCD_DATA20__LCDIF_DATA20	0x79
+			MX6UL_PAD_LCD_DATA21__LCDIF_DATA21	0x79
+			MX6UL_PAD_LCD_DATA22__LCDIF_DATA22	0x79
+			MX6UL_PAD_LCD_DATA23__LCDIF_DATA23	0x79
+		>;
+	};
+
+	pinctrl_pwm4: pwm4-grp {
+		fsl,pins = <
+			MX6UL_PAD_GPIO1_IO05__PWM4_OUT		0x110b0 /* LCD BACKLIGHT */
+		>;
+	};
+};
+
+&lcdif {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_lcdif_dat
+		     &pinctrl_lcdif_ctrl>;
+	status = "okay";
+
+	port {
+		lcdif_out: endpoint {
+			remote-endpoint = <&lvds_enc_in>;
+		};
+	};
+};
+
+&lvds_panel {
+	status = "okay";
+
+	port {
+		lvds_panel_in: endpoint {
+			remote-endpoint = <&lvds_enc_out>;
+		};
+	};
+};
+
+/* PWM LCD */
+&pwm4 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_pwm4>;
+	status = "okay";
+};
diff --git a/arch/arm/boot/dts/nxp/imx/imx6ull-var-som-concerto-full.dts b/arch/arm/boot/dts/nxp/imx/imx6ull-var-som-concerto-full.dts
index 2e1f75d5f25a6..1b7c1a3383eec 100644
--- a/arch/arm/boot/dts/nxp/imx/imx6ull-var-som-concerto-full.dts
+++ b/arch/arm/boot/dts/nxp/imx/imx6ull-var-som-concerto-full.dts
@@ -14,6 +14,7 @@
 #include "imx6ul-var-som-enet2.dtsi"
 #include "imx6ul-var-som-enet1.dtsi"
 #include "imx6ul-var-som-audio.dtsi"
+#include "imx6ul-var-som-lvds-panel.dtsi"
 
 / {
 	model = "Variscite VAR-SOM-6UL Concerto Board (6ULL CPU)";
diff --git a/arch/arm/boot/dts/nxp/imx/imx6ull-var-som-concerto.dts b/arch/arm/boot/dts/nxp/imx/imx6ull-var-som-concerto.dts
index 0d0613e3a34f2..7d032e17134a7 100644
--- a/arch/arm/boot/dts/nxp/imx/imx6ull-var-som-concerto.dts
+++ b/arch/arm/boot/dts/nxp/imx/imx6ull-var-som-concerto.dts
@@ -13,6 +13,7 @@
 #include "imx6ul-var-som-sd.dtsi"
 #include "imx6ul-var-som-enet2.dtsi"
 #include "imx6ul-var-som-audio.dtsi"
+#include "imx6ul-var-som-lvds-panel.dtsi"
 
 / {
 	model = "Variscite VAR-SOM-6UL Concerto Board (6ULL CPU)";
-- 
2.47.3