linux-kernel - [PATCH 2/2] arm64: dts: imx8mp-beacon: Enable LVDS-1

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Message-ID: <20240229233556.116944-2-aford173@gmail.com>
Date: Thu, 29 Feb 2024 17:35:55 -0600
From: Adam Ford <aford173@...il.com>
To: linux-arm-kernel@...ts.infradead.org
Cc: aford@...conembedded.com,
	Adam Ford <aford173@...il.com>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Shawn Guo <shawnguo@...nel.org>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Pengutronix Kernel Team <kernel@...gutronix.de>,
	Fabio Estevam <festevam@...il.com>,
	devicetree@...r.kernel.org,
	imx@...ts.linux.dev,
	linux-kernel@...r.kernel.org
Subject: [PATCH 2/2] arm64: dts: imx8mp-beacon: Enable LVDS-1

Beacon has an LVDS display that can connect to one of the
LVDS ports on the baseboard.  The display requires a 30MHz
clock to display properly, and the LDB needs to run at 7x that.
With the audio CODEC now moved to the AUDIO_PLL1, the AUDIO_PLL2
is now available to source the LDB at 210MHz and the DISP_PIX2.

Signed-off-by: Adam Ford <aford173@...il.com>

diff --git a/arch/arm64/boot/dts/freescale/imx8mp-beacon-kit.dts b/arch/arm64/boot/dts/freescale/imx8mp-beacon-kit.dts
index 1f827ef38e36..731ee2667060 100644
--- a/arch/arm64/boot/dts/freescale/imx8mp-beacon-kit.dts
+++ b/arch/arm64/boot/dts/freescale/imx8mp-beacon-kit.dts
@@ -19,6 +19,26 @@ aliases {
 		ethernet1 = &fec;
 	};
 
+	backlight: backlight {
+		compatible = "pwm-backlight";
+		pwms = <&pwm2 0 100000 0>;
+		power-supply = <&reg_lcd1_reset>;
+		status = "okay";
+
+		brightness-levels = < 0  1  2  3  4  5  6  7  8  9
+				     10 11 12 13 14 15 16 17 18 19
+				     20 21 22 23 24 25 26 27 28 29
+				     30 31 32 33 34 35 36 37 38 39
+				     40 41 42 43 44 45 46 47 48 49
+				     50 51 52 53 54 55 56 57 58 59
+				     60 61 62 63 64 65 66 67 68 69
+				     70 71 72 73 74 75 76 77 78 79
+				     80 81 82 83 84 85 86 87 88 89
+				     90 91 92 93 94 95 96 97 98 99
+				    100>;
+		default-brightness-level = <80>;
+	};
+
 	chosen {
 		stdout-path = &uart2;
 	};
@@ -135,6 +155,38 @@ led-3 {
 		};
 	};
 
+	lvds-1 {
+		compatible = "panel-lvds";
+		power-supply = <&reg_lcd1>;
+		width-mm = <223>;
+		height-mm = <125>;
+		backlight = <&backlight>;
+		data-mapping = "vesa-24";
+
+		panel-timing {
+			/* 800x480@...z */
+			clock-frequency = <30000000>;
+			hactive = <800>;
+			vactive = <480>;
+			hsync-len = <48>;
+			hfront-porch = <40>;
+			hback-porch = <40>;
+			vfront-porch = <13>;
+			vback-porch = <29>;
+			vsync-len = <1>;
+			hsync-active = <1>;
+			vsync-active = <3>;
+			de-active = <1>;
+			pixelclk-active = <0>;
+		};
+
+		port {
+			panel1_in: endpoint {
+				remote-endpoint = <&ldb_lvds_ch1>;
+			};
+		};
+	};
+
 	reg_audio: regulator-wm8962 {
 		compatible = "regulator-fixed";
 		regulator-name = "3v3_aud";
@@ -144,6 +196,25 @@ reg_audio: regulator-wm8962 {
 		enable-active-high;
 	};
 
+	reg_lcd1_reset: regulator-lcd1-reset {
+		compatible = "regulator-fixed";
+		regulator-name = "LVDS-1 reset";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		gpio = <&pca6416_3 13 GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+		vin-supply = <&reg_lcd1>;
+	};
+
+	reg_lcd1: regulator-lcd1 {
+		compatible = "regulator-fixed";
+		regulator-name = "lvds-1 power";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		gpio = <&pca6416_3 14 GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+	};
+
 	reg_usdhc2_vmmc: regulator-usdhc2 {
 		compatible = "regulator-fixed";
 		regulator-name = "VSD_3V3";
@@ -457,6 +528,38 @@ &lcdif1 {
 	status = "okay";
 };
 
+&lcdif2 {
+	status = "okay";
+};
+
+&lvds_bridge {
+	assigned-clocks = <&clk IMX8MP_CLK_MEDIA_LDB>, <&clk IMX8MP_AUDIO_PLL2_OUT>;
+	assigned-clock-parents = <&clk IMX8MP_AUDIO_PLL2_OUT>;
+	assigned-clock-rates = <210000000>, <210000000>;
+	status = "okay";
+
+	ports {
+		port@2 {
+			ldb_lvds_ch1: endpoint {
+				remote-endpoint = <&panel1_in>;
+			};
+		};
+	};
+};
+
+&media_blk_ctrl {
+	assigned-clocks = <&clk IMX8MP_CLK_MEDIA_AXI>,
+			  <&clk IMX8MP_CLK_MEDIA_APB>,
+			  <&clk IMX8MP_CLK_MEDIA_DISP1_PIX>,
+			  <&clk IMX8MP_CLK_MEDIA_DISP2_PIX>,
+			  <&clk IMX8MP_VIDEO_PLL1>;
+	assigned-clock-parents = <&clk IMX8MP_SYS_PLL2_1000M>,
+				 <&clk IMX8MP_SYS_PLL1_800M>,
+				 <&clk IMX8MP_VIDEO_PLL1_OUT>,
+				 <&clk IMX8MP_AUDIO_PLL2_OUT>;
+	assigned-clock-rates = <500000000>, <200000000>, <0>, <0>, <1039500000>;
+};
+
 &micfil {
 	pinctrl-names = "default";
 	pinctrl-0 = <&pinctrl_pdm>;
@@ -496,6 +599,12 @@ &pcie_phy {
 	status = "okay";
 };
 
+&pwm2 {
+	status = "okay";
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_pwm2>;
+};
+
 &sai3 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&pinctrl_sai3>;
@@ -596,6 +705,13 @@ &usdhc2 {
 };
 
 &iomuxc {
+
+	pinctrl_pwm2: pwm2grp {
+		fsl,pins = <
+			MX8MP_IOMUXC_GPIO1_IO09__PWM2_OUT	0x116
+		>;
+	};
+
 	pinctrl_ecspi2: ecspi2grp {
 		fsl,pins = <
 			MX8MP_IOMUXC_ECSPI2_SCLK__ECSPI2_SCLK	0x82
-- 
2.43.0