[PATCH 0/4] arm64: dts: imx8mm-kontron: Add HDMI and LVDS display support

[PATCH 0/4] arm64: dts: imx8mm-kontron: Add HDMI and LVDS display support

[Frieder Schrempf]

From: Frieder Schrempf <frieder.schrempf@kontron.de>

This add support for the display bridges (DSI->LVDS and DSI->HDMI)
on the BL i.MX8MM and the 7" LVDS panel in a separate overlay.

Only one of the interfaces (HDMI or LVDS) is supported at the same
time. Enabling the LVDS overlay will disable the HDMI interface.

* Patch 1 and 2: Add the necessary binding changes
* Patch 3: Extend the BL devicetree
* Patch 4: Add the LVDS panel overlay

Frieder Schrempf (4):
  dt-bindings: vendor-prefixes: Add Jenson Display
  dt-bindings: display: panel-lvds: Add compatible for Jenson
    BL-JT60050-01A
  arm64: dts: imx8mm-kontron: Add support for display bridges on BL
    i.MX8MM
  arm64: dts: imx8mm-kontron: Add DL (Display-Line) overlay with LVDS
    support

 .../bindings/display/panel/panel-lvds.yaml    |   2 +
 .../devicetree/bindings/vendor-prefixes.yaml  |   2 +
 arch/arm64/boot/dts/freescale/Makefile        |   4 +
 .../boot/dts/freescale/imx8mm-kontron-bl.dts  | 146 ++++++++++++
 .../boot/dts/freescale/imx8mm-kontron-dl.dtso | 210 ++++++++++++++++++
 5 files changed, 364 insertions(+)
 create mode 100644 arch/arm64/boot/dts/freescale/imx8mm-kontron-dl.dtso

-- 
2.45.2

[PATCH 3/4] arm64: dts: imx8mm-kontron: Add support for display bridges on BL i.MX8MM

[Frieder Schrempf]

From: Frieder Schrempf <frieder.schrempf@kontron.de>

The Kontron Electronics BL i.MX8MM has oboard disply bridges for
DSI->HDMI and DSI->LVDS conversion. The DSI interface is muxed by
a GPIO-controlled switch to one of these two bridges.

By default the HDMI bridge is enabled. The LVDS bridge can be
selected by loading an additional (panel-specific) overlay.

Signed-off-by: Frieder Schrempf <frieder.schrempf@kontron.de>
---
 .../boot/dts/freescale/imx8mm-kontron-bl.dts  | 146 ++++++++++++++++++
 1 file changed, 146 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/imx8mm-kontron-bl.dts b/arch/arm64/boot/dts/freescale/imx8mm-kontron-bl.dts
index aab8e24216501..2b344206dfd16 100644
--- a/arch/arm64/boot/dts/freescale/imx8mm-kontron-bl.dts
+++ b/arch/arm64/boot/dts/freescale/imx8mm-kontron-bl.dts
@@ -25,6 +25,17 @@ osc_can: clock-osc-can {
 		clock-output-names = "osc-can";
 	};
 
+	hdmi-out {
+		compatible = "hdmi-connector";
+		type = "a";
+
+		port {
+			hdmi_in_conn: endpoint {
+				remote-endpoint = <&bridge_out_conn>;
+			};
+		};
+	};
+
 	leds {
 		compatible = "gpio-leds";
 		pinctrl-names = "default";
@@ -132,6 +143,90 @@ ethphy: ethernet-phy@0 {
 	};
 };
 
+&gpio4 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_gpio4>;
+
+	dsi_mux_sel_hdmi: dsi-mux-sel-hdmi-hog {
+		gpio-hog;
+		gpios = <14 GPIO_ACTIVE_HIGH>;
+		output-high;
+		line-name = "dsi-mux-sel";
+	};
+
+	dsi_mux_sel_lvds: dsi-mux-sel-lvds-hog {
+		gpio-hog;
+		gpios = <14 GPIO_ACTIVE_HIGH>;
+		output-low;
+		line-name = "dsi-mux-sel";
+		status = "disabled";
+	};
+
+	dsi-mux-oe-hog {
+		gpio-hog;
+		gpios = <15 GPIO_ACTIVE_LOW>;
+		output-high;
+		line-name = "dsi-mux-oe";
+	};
+};
+
+&i2c3 {
+	clock-frequency = <400000>;
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_i2c3>;
+	status = "okay";
+
+	hdmi: hdmi@39 {
+		compatible = "adi,adv7535";
+		reg = <0x39>;
+
+		pinctrl-names = "default";
+		pinctrl-0 = <&pinctrl_adv7535>;
+
+		interrupt-parent = <&gpio4>;
+		interrupts = <16 IRQ_TYPE_LEVEL_LOW>;
+
+		adi,dsi-lanes = <4>;
+
+		a2vdd-supply = <&reg_vdd_1v8>;
+		avdd-supply = <&reg_vdd_1v8>;
+		dvdd-supply = <&reg_vdd_1v8>;
+		pvdd-supply = <&reg_vdd_1v8>;
+		v1p2-supply = <&reg_vdd_1v8>;
+		v3p3-supply = <&reg_vdd_3v3>;
+
+		ports {
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			port@0 {
+				reg = <0>;
+
+				bridge_in_dsi_hdmi: endpoint {
+					remote-endpoint = <&dsi_out_bridge>;
+				};
+			};
+
+			port@1 {
+				reg = <1>;
+
+				bridge_out_conn: endpoint {
+					remote-endpoint = <&hdmi_in_conn>;
+				};
+			};
+		};
+	};
+
+	lvds: bridge@2c {
+		compatible = "ti,sn65dsi84";
+		reg = <0x2c>;
+		enable-gpios = <&gpio4 26 GPIO_ACTIVE_HIGH>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&pinctrl_sn65dsi84>;
+		status = "disabled";
+	};
+};
+
 &i2c4 {
 	clock-frequency = <100000>;
 	pinctrl-names = "default";
@@ -144,6 +239,30 @@ rx8900: rtc@32 {
 	};
 };
 
+&lcdif {
+	status = "okay";
+};
+
+&mipi_dsi {
+	samsung,esc-clock-frequency = <54000000>;
+	/*
+	 * Let the driver calculate an appropriate clock rate based on the pixel
+	 * clock instead of using the fixed value from imx8mm.dtsi.
+	 */
+	/delete-property/ samsung,pll-clock-frequency;
+	status = "okay";
+
+	ports {
+		port@1 {
+			reg = <1>;
+
+			dsi_out_bridge: endpoint {
+				remote-endpoint = <&bridge_in_dsi_hdmi>;
+			};
+		};
+	};
+};
+
 &pwm2 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&pinctrl_pwm2>;
@@ -207,6 +326,12 @@ &iomuxc {
 	pinctrl-names = "default";
 	pinctrl-0 = <&pinctrl_gpio>;
 
+	pinctrl_adv7535: adv7535grp {
+		fsl,pins = <
+			MX8MM_IOMUXC_SAI1_TXD4_GPIO4_IO16		0x19
+		>;
+	};
+
 	pinctrl_can: cangrp {
 		fsl,pins = <
 			MX8MM_IOMUXC_SAI3_RXFS_GPIO4_IO28		0x19
@@ -277,6 +402,20 @@ MX8MM_IOMUXC_SAI3_MCLK_GPIO5_IO2		0x19
 		>;
 	};
 
+	pinctrl_gpio4: gpio4grp {
+		fsl,pins = <
+			MX8MM_IOMUXC_SAI1_TXD2_GPIO4_IO14		0x19
+			MX8MM_IOMUXC_SAI1_TXD3_GPIO4_IO15		0x19
+		>;
+	};
+
+	pinctrl_i2c3: i2c3grp {
+		fsl,pins = <
+			MX8MM_IOMUXC_I2C3_SCL_I2C3_SCL			0x40000083
+			MX8MM_IOMUXC_I2C3_SDA_I2C3_SDA			0x40000083
+		>;
+	};
+
 	pinctrl_i2c4: i2c4grp {
 		fsl,pins = <
 			MX8MM_IOMUXC_I2C4_SCL_I2C4_SCL			0x40000083
@@ -290,6 +429,13 @@ MX8MM_IOMUXC_SPDIF_RX_PWM2_OUT			0x19
 		>;
 	};
 
+	pinctrl_sn65dsi84: sn65dsi84grp {
+		fsl,pins = <
+			MX8MM_IOMUXC_SAI2_TXD0_GPIO4_IO26		0x19
+			MX8MM_IOMUXC_SD2_WP_GPIO2_IO20			0x19
+		>;
+	};
+
 	pinctrl_uart1: uart1grp {
 		fsl,pins = <
 			MX8MM_IOMUXC_SAI2_RXC_UART1_DCE_RX		0x0
-- 
2.45.2

Re: [PATCH 3/4] arm64: dts: imx8mm-kontron: Add support for display bridges on BL i.MX8MM

[Shawn Guo]

On Tue, Aug 06, 2024 at 03:33:01PM +0200, Frieder Schrempf wrote:
> From: Frieder Schrempf <frieder.schrempf@kontron.de>
> 
> The Kontron Electronics BL i.MX8MM has oboard disply bridges for
> DSI->HDMI and DSI->LVDS conversion. The DSI interface is muxed by
> a GPIO-controlled switch to one of these two bridges.
> 
> By default the HDMI bridge is enabled. The LVDS bridge can be
> selected by loading an additional (panel-specific) overlay.
> 
> Signed-off-by: Frieder Schrempf <frieder.schrempf@kontron.de>
> ---
>  .../boot/dts/freescale/imx8mm-kontron-bl.dts  | 146 ++++++++++++++++++
>  1 file changed, 146 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/freescale/imx8mm-kontron-bl.dts b/arch/arm64/boot/dts/freescale/imx8mm-kontron-bl.dts
> index aab8e24216501..2b344206dfd16 100644
> --- a/arch/arm64/boot/dts/freescale/imx8mm-kontron-bl.dts
> +++ b/arch/arm64/boot/dts/freescale/imx8mm-kontron-bl.dts
> @@ -25,6 +25,17 @@ osc_can: clock-osc-can {
>  		clock-output-names = "osc-can";
>  	};
>  
> +	hdmi-out {
> +		compatible = "hdmi-connector";
> +		type = "a";
> +
> +		port {
> +			hdmi_in_conn: endpoint {
> +				remote-endpoint = <&bridge_out_conn>;
> +			};
> +		};
> +	};
> +
>  	leds {
>  		compatible = "gpio-leds";
>  		pinctrl-names = "default";
> @@ -132,6 +143,90 @@ ethphy: ethernet-phy@0 {
>  	};
>  };
>  
> +&gpio4 {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&pinctrl_gpio4>;
> +
> +	dsi_mux_sel_hdmi: dsi-mux-sel-hdmi-hog {
> +		gpio-hog;
> +		gpios = <14 GPIO_ACTIVE_HIGH>;
> +		output-high;
> +		line-name = "dsi-mux-sel";
> +	};
> +
> +	dsi_mux_sel_lvds: dsi-mux-sel-lvds-hog {
> +		gpio-hog;
> +		gpios = <14 GPIO_ACTIVE_HIGH>;
> +		output-low;
> +		line-name = "dsi-mux-sel";
> +		status = "disabled";
> +	};
> +
> +	dsi-mux-oe-hog {
> +		gpio-hog;
> +		gpios = <15 GPIO_ACTIVE_LOW>;
> +		output-high;
> +		line-name = "dsi-mux-oe";
> +	};
> +};
> +
> +&i2c3 {
> +	clock-frequency = <400000>;
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&pinctrl_i2c3>;
> +	status = "okay";
> +
> +	hdmi: hdmi@39 {
> +		compatible = "adi,adv7535";
> +		reg = <0x39>;
> +
> +		pinctrl-names = "default";
> +		pinctrl-0 = <&pinctrl_adv7535>;
> +
> +		interrupt-parent = <&gpio4>;
> +		interrupts = <16 IRQ_TYPE_LEVEL_LOW>;
> +
> +		adi,dsi-lanes = <4>;
> +

Can we drop these newlines in the middle of property list?

> +		a2vdd-supply = <&reg_vdd_1v8>;
> +		avdd-supply = <&reg_vdd_1v8>;
> +		dvdd-supply = <&reg_vdd_1v8>;
> +		pvdd-supply = <&reg_vdd_1v8>;
> +		v1p2-supply = <&reg_vdd_1v8>;
> +		v3p3-supply = <&reg_vdd_3v3>;
> +
> +		ports {
> +			#address-cells = <1>;
> +			#size-cells = <0>;
> +
> +			port@0 {
> +				reg = <0>;
> +
> +				bridge_in_dsi_hdmi: endpoint {
> +					remote-endpoint = <&dsi_out_bridge>;
> +				};
> +			};
> +
> +			port@1 {
> +				reg = <1>;
> +
> +				bridge_out_conn: endpoint {
> +					remote-endpoint = <&hdmi_in_conn>;
> +				};
> +			};
> +		};
> +	};
> +
> +	lvds: bridge@2c {

Sort I2C devices in unit-address.

Shawn

> +		compatible = "ti,sn65dsi84";
> +		reg = <0x2c>;
> +		enable-gpios = <&gpio4 26 GPIO_ACTIVE_HIGH>;
> +		pinctrl-names = "default";
> +		pinctrl-0 = <&pinctrl_sn65dsi84>;
> +		status = "disabled";
> +	};
> +};
> +
>  &i2c4 {
>  	clock-frequency = <100000>;
>  	pinctrl-names = "default";
> @@ -144,6 +239,30 @@ rx8900: rtc@32 {
>  	};
>  };
>  
> +&lcdif {
> +	status = "okay";
> +};
> +
> +&mipi_dsi {
> +	samsung,esc-clock-frequency = <54000000>;
> +	/*
> +	 * Let the driver calculate an appropriate clock rate based on the pixel
> +	 * clock instead of using the fixed value from imx8mm.dtsi.
> +	 */
> +	/delete-property/ samsung,pll-clock-frequency;
> +	status = "okay";
> +
> +	ports {
> +		port@1 {
> +			reg = <1>;
> +
> +			dsi_out_bridge: endpoint {
> +				remote-endpoint = <&bridge_in_dsi_hdmi>;
> +			};
> +		};
> +	};
> +};
> +
>  &pwm2 {
>  	pinctrl-names = "default";
>  	pinctrl-0 = <&pinctrl_pwm2>;
> @@ -207,6 +326,12 @@ &iomuxc {
>  	pinctrl-names = "default";
>  	pinctrl-0 = <&pinctrl_gpio>;
>  
> +	pinctrl_adv7535: adv7535grp {
> +		fsl,pins = <
> +			MX8MM_IOMUXC_SAI1_TXD4_GPIO4_IO16		0x19
> +		>;
> +	};
> +
>  	pinctrl_can: cangrp {
>  		fsl,pins = <
>  			MX8MM_IOMUXC_SAI3_RXFS_GPIO4_IO28		0x19
> @@ -277,6 +402,20 @@ MX8MM_IOMUXC_SAI3_MCLK_GPIO5_IO2		0x19
>  		>;
>  	};
>  
> +	pinctrl_gpio4: gpio4grp {
> +		fsl,pins = <
> +			MX8MM_IOMUXC_SAI1_TXD2_GPIO4_IO14		0x19
> +			MX8MM_IOMUXC_SAI1_TXD3_GPIO4_IO15		0x19
> +		>;
> +	};
> +
> +	pinctrl_i2c3: i2c3grp {
> +		fsl,pins = <
> +			MX8MM_IOMUXC_I2C3_SCL_I2C3_SCL			0x40000083
> +			MX8MM_IOMUXC_I2C3_SDA_I2C3_SDA			0x40000083
> +		>;
> +	};
> +
>  	pinctrl_i2c4: i2c4grp {
>  		fsl,pins = <
>  			MX8MM_IOMUXC_I2C4_SCL_I2C4_SCL			0x40000083
> @@ -290,6 +429,13 @@ MX8MM_IOMUXC_SPDIF_RX_PWM2_OUT			0x19
>  		>;
>  	};
>  
> +	pinctrl_sn65dsi84: sn65dsi84grp {
> +		fsl,pins = <
> +			MX8MM_IOMUXC_SAI2_TXD0_GPIO4_IO26		0x19
> +			MX8MM_IOMUXC_SD2_WP_GPIO2_IO20			0x19
> +		>;
> +	};
> +
>  	pinctrl_uart1: uart1grp {
>  		fsl,pins = <
>  			MX8MM_IOMUXC_SAI2_RXC_UART1_DCE_RX		0x0
> -- 
> 2.45.2
> 

[PATCH 4/4] arm64: dts: imx8mm-kontron: Add DL (Display-Line) overlay with LVDS support

[Frieder Schrempf]

From: Frieder Schrempf <frieder.schrempf@kontron.de>

The Kontron Electronics DL i.MX8MM consists of the BL i.MX8MM board
and a 7" LVDS panel. Provide an overlay that enables the panel.

Signed-off-by: Frieder Schrempf <frieder.schrempf@kontron.de>
---
Note: This currently throws the following warnings:

Warning (graph_port): /fragment@3: graph port node name should be 'port'
Warning (graph_endpoint): /fragment@3/__overlay__: graph endpoint node name should be 'endpoint'
Warning (graph_endpoint): /fragment@3/__overlay__: graph connection to node '/fragment@7/__overlay__/ports/port@0/endpoint' is not bidirectional

There is the following commit in DTC that relaxes these checks and
will eventually resolve these warnings:

84b056a89d ("checks: relax graph checks for overlays")

https://git.kernel.org/pub/scm/utils/dtc/dtc.git/commit/?id=84b056a89d3c5b6cf6c5eeeafd4c4b14d6333aa9
---
 arch/arm64/boot/dts/freescale/Makefile        |   4 +
 .../boot/dts/freescale/imx8mm-kontron-dl.dtso | 210 ++++++++++++++++++
 2 files changed, 214 insertions(+)
 create mode 100644 arch/arm64/boot/dts/freescale/imx8mm-kontron-dl.dtso

diff --git a/arch/arm64/boot/dts/freescale/Makefile b/arch/arm64/boot/dts/freescale/Makefile
index f04c22b7de72e..d8af069139920 100644
--- a/arch/arm64/boot/dts/freescale/Makefile
+++ b/arch/arm64/boot/dts/freescale/Makefile
@@ -244,6 +244,10 @@ dtb-$(CONFIG_ARCH_MXC) += imx93-tqma9352-mba93xxla.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx93-var-som-symphony.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx95-19x19-evk.dtb
 
+imx8mm-kontron-dl-dtbs			:= imx8mm-kontron-bl.dtb imx8mm-kontron-dl.dtbo
+
+dtb-$(CONFIG_ARCH_MXC) += imx8mm-kontron-dl.dtb
+
 imx8mm-venice-gw72xx-0x-imx219-dtbs	:= imx8mm-venice-gw72xx-0x.dtb imx8mm-venice-gw72xx-0x-imx219.dtbo
 imx8mm-venice-gw72xx-0x-rpidsi-dtbs	:= imx8mm-venice-gw72xx-0x.dtb imx8mm-venice-gw72xx-0x-rpidsi.dtbo
 imx8mm-venice-gw72xx-0x-rs232-rts-dtbs	:= imx8mm-venice-gw72xx-0x.dtb imx8mm-venice-gw72xx-0x-rs232-rts.dtbo
diff --git a/arch/arm64/boot/dts/freescale/imx8mm-kontron-dl.dtso b/arch/arm64/boot/dts/freescale/imx8mm-kontron-dl.dtso
new file mode 100644
index 0000000000000..b2d593d700e2d
--- /dev/null
+++ b/arch/arm64/boot/dts/freescale/imx8mm-kontron-dl.dtso
@@ -0,0 +1,210 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2023 Kontron Electronics GmbH
+ */
+
+/dts-v1/;
+/plugin/;
+
+#include <dt-bindings/gpio/gpio.h>
+#include "imx8mm-pinfunc.h"
+
+&{/} {
+	compatible = "kontron,imx8mm-bl", "kontron,imx8mm-sl", "fsl,imx8mm";
+
+	backlight: backlight {
+		compatible = "pwm-backlight";
+		pwms = <&pwm1 0 50000 0>;
+		brightness-levels = <0 100>;
+		num-interpolated-steps = <100>;
+		default-brightness-level = <100>;
+	};
+
+	panel {
+		compatible = "jenson,bl-jt60050-01a", "panel-lvds";
+		pinctrl-names = "default";
+		pinctrl-0 = <&pinctrl_panel>;
+		backlight = <&backlight>;
+		data-mapping = "vesa-24";
+		enable-gpios = <&gpio3 19 GPIO_ACTIVE_HIGH>;
+		height-mm = <86>;
+		width-mm = <154>;
+
+		panel-timing {
+			clock-frequency = <51200000>;
+			hactive = <1024>;
+			vactive = <600>;
+			hsync-len = <1>;
+			hfront-porch = <160>;
+			hback-porch = <160>;
+			vsync-len = <1>;
+			vfront-porch = <12>;
+			vback-porch = <23>;
+		};
+
+		port {
+			panel_out_bridge: endpoint {
+				remote-endpoint = <&bridge_out_panel>;
+			};
+		};
+	};
+};
+
+&dsi_mux_sel_hdmi {
+	status = "disabled";
+};
+
+&dsi_mux_sel_lvds {
+	status = "okay";
+};
+
+&dsi_out_bridge {
+	remote-endpoint = <&bridge_in_dsi_lvds>;
+};
+
+&gpio3 {
+	panel-rst-hog {
+		gpio-hog;
+		gpios = <20 GPIO_ACTIVE_HIGH>;
+		output-high;
+		line-name = "panel-reset";
+		pinctrl-names = "default";
+		pinctrl-0 = <&pinctrl_panel_rst>;
+	};
+
+	panel-stby-hog {
+		gpio-hog;
+		gpios = <21 GPIO_ACTIVE_HIGH>;
+		output-high;
+		line-name = "panel-standby";
+		pinctrl-names = "default";
+		pinctrl-0 = <&pinctrl_panel_stby>;
+	};
+
+	panel-hinv-hog {
+		gpio-hog;
+		gpios = <24 GPIO_ACTIVE_HIGH>;
+		output-high;
+		line-name = "panel-horizontal-invert";
+		pinctrl-names = "default";
+		pinctrl-0 = <&pinctrl_panel_hinv>;
+	};
+
+	panel-vinv-hog {
+		gpio-hog;
+		gpios = <25 GPIO_ACTIVE_HIGH>;
+		output-low;
+		line-name = "panel-vertical-invert";
+		pinctrl-names = "default";
+		pinctrl-0 = <&pinctrl_panel_vinv>;
+	};
+};
+
+&hdmi {
+	status = "disabled";
+};
+
+&i2c2 {
+	clock-frequency = <400000>;
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_i2c2>;
+	status = "okay";
+
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	gt911@5d {
+		compatible = "goodix,gt928";
+		reg = <0x5d>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&pinctrl_touch>;
+		interrupt-parent = <&gpio3>;
+		interrupts = <22 8>;
+		reset-gpios = <&gpio3 23 0>;
+		irq-gpios = <&gpio3 22 0>;
+	};
+};
+
+&lvds {
+	status = "okay";
+
+	ports {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		port@0 {
+			reg = <0>;
+
+			bridge_in_dsi_lvds: endpoint {
+				remote-endpoint = <&dsi_out_bridge>;
+				data-lanes = <1 2>;
+			};
+		};
+
+		port@2 {
+			reg = <2>;
+
+			bridge_out_panel: endpoint {
+				remote-endpoint = <&panel_out_bridge>;
+			};
+		};
+	};
+};
+
+&pwm1 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_pwm1>;
+	status = "okay";
+};
+
+&iomuxc {
+	pinctrl_i2c2: i2c2grp {
+		fsl,pins = <
+			MX8MM_IOMUXC_I2C2_SCL_I2C2_SCL			0x40000083
+			MX8MM_IOMUXC_I2C2_SDA_I2C2_SDA			0x40000083
+		>;
+	};
+
+	pinctrl_panel: panelgrp {
+		fsl,pins = <
+			MX8MM_IOMUXC_SAI5_RXFS_GPIO3_IO19		0x19
+		>;
+	};
+
+	pinctrl_panel_hinv: panelhinvgrp {
+		fsl,pins = <
+			MX8MM_IOMUXC_SAI5_RXD3_GPIO3_IO24		0x19
+		>;
+	};
+
+	pinctrl_panel_rst: panelrstgrp {
+		fsl,pins = <
+			MX8MM_IOMUXC_SAI5_RXC_GPIO3_IO20		0x19
+		>;
+	};
+
+	pinctrl_panel_stby: panelstbygrp {
+		fsl,pins = <
+			MX8MM_IOMUXC_SAI5_RXD0_GPIO3_IO21		0x19
+		>;
+	};
+
+	pinctrl_panel_vinv: panelvinvgrp {
+		fsl,pins = <
+			MX8MM_IOMUXC_SAI5_MCLK_GPIO3_IO25		0x19
+		>;
+	};
+
+	pinctrl_pwm1: pwm1grp {
+		fsl,pins = <
+			MX8MM_IOMUXC_SPDIF_EXT_CLK_PWM1_OUT		0x6
+		>;
+	};
+
+	pinctrl_touch: touchgrp {
+		fsl,pins = <
+			MX8MM_IOMUXC_SAI5_RXD1_GPIO3_IO22		0x19
+			MX8MM_IOMUXC_SAI5_RXD2_GPIO3_IO23		0x19
+		>;
+	};
+};
-- 
2.45.2

Re: [PATCH 4/4] arm64: dts: imx8mm-kontron: Add DL (Display-Line) overlay with LVDS support

[Shawn Guo]

On Tue, Aug 06, 2024 at 03:33:02PM +0200, Frieder Schrempf wrote:
> From: Frieder Schrempf <frieder.schrempf@kontron.de>
> 
> The Kontron Electronics DL i.MX8MM consists of the BL i.MX8MM board
> and a 7" LVDS panel. Provide an overlay that enables the panel.
> 
> Signed-off-by: Frieder Schrempf <frieder.schrempf@kontron.de>
> ---
> Note: This currently throws the following warnings:
> 
> Warning (graph_port): /fragment@3: graph port node name should be 'port'
> Warning (graph_endpoint): /fragment@3/__overlay__: graph endpoint node name should be 'endpoint'
> Warning (graph_endpoint): /fragment@3/__overlay__: graph connection to node '/fragment@7/__overlay__/ports/port@0/endpoint' is not bidirectional
> 
> There is the following commit in DTC that relaxes these checks and
> will eventually resolve these warnings:
> 
> 84b056a89d ("checks: relax graph checks for overlays")
> 
> https://git.kernel.org/pub/scm/utils/dtc/dtc.git/commit/?id=84b056a89d3c5b6cf6c5eeeafd4c4b14d6333aa9
> ---
>  arch/arm64/boot/dts/freescale/Makefile        |   4 +
>  .../boot/dts/freescale/imx8mm-kontron-dl.dtso | 210 ++++++++++++++++++
>  2 files changed, 214 insertions(+)
>  create mode 100644 arch/arm64/boot/dts/freescale/imx8mm-kontron-dl.dtso
> 
> diff --git a/arch/arm64/boot/dts/freescale/Makefile b/arch/arm64/boot/dts/freescale/Makefile
> index f04c22b7de72e..d8af069139920 100644
> --- a/arch/arm64/boot/dts/freescale/Makefile
> +++ b/arch/arm64/boot/dts/freescale/Makefile
> @@ -244,6 +244,10 @@ dtb-$(CONFIG_ARCH_MXC) += imx93-tqma9352-mba93xxla.dtb
>  dtb-$(CONFIG_ARCH_MXC) += imx93-var-som-symphony.dtb
>  dtb-$(CONFIG_ARCH_MXC) += imx95-19x19-evk.dtb
>  
> +imx8mm-kontron-dl-dtbs			:= imx8mm-kontron-bl.dtb imx8mm-kontron-dl.dtbo
> +
> +dtb-$(CONFIG_ARCH_MXC) += imx8mm-kontron-dl.dtb
> +
>  imx8mm-venice-gw72xx-0x-imx219-dtbs	:= imx8mm-venice-gw72xx-0x.dtb imx8mm-venice-gw72xx-0x-imx219.dtbo
>  imx8mm-venice-gw72xx-0x-rpidsi-dtbs	:= imx8mm-venice-gw72xx-0x.dtb imx8mm-venice-gw72xx-0x-rpidsi.dtbo
>  imx8mm-venice-gw72xx-0x-rs232-rts-dtbs	:= imx8mm-venice-gw72xx-0x.dtb imx8mm-venice-gw72xx-0x-rs232-rts.dtbo
> diff --git a/arch/arm64/boot/dts/freescale/imx8mm-kontron-dl.dtso b/arch/arm64/boot/dts/freescale/imx8mm-kontron-dl.dtso
> new file mode 100644
> index 0000000000000..b2d593d700e2d
> --- /dev/null
> +++ b/arch/arm64/boot/dts/freescale/imx8mm-kontron-dl.dtso
> @@ -0,0 +1,210 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * Copyright (C) 2023 Kontron Electronics GmbH

2024?

> + */
> +
> +/dts-v1/;
> +/plugin/;
> +
> +#include <dt-bindings/gpio/gpio.h>
> +#include "imx8mm-pinfunc.h"
> +
> +&{/} {
> +	compatible = "kontron,imx8mm-bl", "kontron,imx8mm-sl", "fsl,imx8mm";

Not sure we need compatible in overlay.

> +
> +	backlight: backlight {
> +		compatible = "pwm-backlight";
> +		pwms = <&pwm1 0 50000 0>;
> +		brightness-levels = <0 100>;
> +		num-interpolated-steps = <100>;
> +		default-brightness-level = <100>;
> +	};
> +
> +	panel {
> +		compatible = "jenson,bl-jt60050-01a", "panel-lvds";
> +		pinctrl-names = "default";
> +		pinctrl-0 = <&pinctrl_panel>;
> +		backlight = <&backlight>;
> +		data-mapping = "vesa-24";
> +		enable-gpios = <&gpio3 19 GPIO_ACTIVE_HIGH>;
> +		height-mm = <86>;
> +		width-mm = <154>;
> +
> +		panel-timing {
> +			clock-frequency = <51200000>;
> +			hactive = <1024>;
> +			vactive = <600>;
> +			hsync-len = <1>;
> +			hfront-porch = <160>;
> +			hback-porch = <160>;
> +			vsync-len = <1>;
> +			vfront-porch = <12>;
> +			vback-porch = <23>;
> +		};
> +
> +		port {
> +			panel_out_bridge: endpoint {
> +				remote-endpoint = <&bridge_out_panel>;
> +			};
> +		};
> +	};
> +};
> +
> +&dsi_mux_sel_hdmi {
> +	status = "disabled";
> +};
> +
> +&dsi_mux_sel_lvds {
> +	status = "okay";
> +};
> +
> +&dsi_out_bridge {
> +	remote-endpoint = <&bridge_in_dsi_lvds>;
> +};
> +
> +&gpio3 {
> +	panel-rst-hog {
> +		gpio-hog;
> +		gpios = <20 GPIO_ACTIVE_HIGH>;
> +		output-high;
> +		line-name = "panel-reset";
> +		pinctrl-names = "default";
> +		pinctrl-0 = <&pinctrl_panel_rst>;

Are you sure the pinctrl in the gpio-hog node works?  Grouping these
pins as pinctrl_gpio3 in parent node (like you did in patch #3) might be
a good idea.

> +	};
> +
> +	panel-stby-hog {
> +		gpio-hog;
> +		gpios = <21 GPIO_ACTIVE_HIGH>;
> +		output-high;
> +		line-name = "panel-standby";
> +		pinctrl-names = "default";
> +		pinctrl-0 = <&pinctrl_panel_stby>;
> +	};
> +
> +	panel-hinv-hog {
> +		gpio-hog;
> +		gpios = <24 GPIO_ACTIVE_HIGH>;
> +		output-high;
> +		line-name = "panel-horizontal-invert";
> +		pinctrl-names = "default";
> +		pinctrl-0 = <&pinctrl_panel_hinv>;
> +	};
> +
> +	panel-vinv-hog {
> +		gpio-hog;
> +		gpios = <25 GPIO_ACTIVE_HIGH>;
> +		output-low;
> +		line-name = "panel-vertical-invert";
> +		pinctrl-names = "default";
> +		pinctrl-0 = <&pinctrl_panel_vinv>;
> +	};
> +};
> +
> +&hdmi {
> +	status = "disabled";
> +};
> +
> +&i2c2 {
> +	clock-frequency = <400000>;
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&pinctrl_i2c2>;
> +	status = "okay";
> +
> +	#address-cells = <1>;
> +	#size-cells = <0>;

Can we move these two into property list above which ends with 'status'?

> +
> +	gt911@5d {

Can we use a generic name for the device node?

Shawn

> +		compatible = "goodix,gt928";
> +		reg = <0x5d>;
> +		pinctrl-names = "default";
> +		pinctrl-0 = <&pinctrl_touch>;
> +		interrupt-parent = <&gpio3>;
> +		interrupts = <22 8>;
> +		reset-gpios = <&gpio3 23 0>;
> +		irq-gpios = <&gpio3 22 0>;
> +	};
> +};
> +
> +&lvds {
> +	status = "okay";
> +
> +	ports {
> +		#address-cells = <1>;
> +		#size-cells = <0>;
> +
> +		port@0 {
> +			reg = <0>;
> +
> +			bridge_in_dsi_lvds: endpoint {
> +				remote-endpoint = <&dsi_out_bridge>;
> +				data-lanes = <1 2>;
> +			};
> +		};
> +
> +		port@2 {
> +			reg = <2>;
> +
> +			bridge_out_panel: endpoint {
> +				remote-endpoint = <&panel_out_bridge>;
> +			};
> +		};
> +	};
> +};
> +
> +&pwm1 {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&pinctrl_pwm1>;
> +	status = "okay";
> +};
> +
> +&iomuxc {
> +	pinctrl_i2c2: i2c2grp {
> +		fsl,pins = <
> +			MX8MM_IOMUXC_I2C2_SCL_I2C2_SCL			0x40000083
> +			MX8MM_IOMUXC_I2C2_SDA_I2C2_SDA			0x40000083
> +		>;
> +	};
> +
> +	pinctrl_panel: panelgrp {
> +		fsl,pins = <
> +			MX8MM_IOMUXC_SAI5_RXFS_GPIO3_IO19		0x19
> +		>;
> +	};
> +
> +	pinctrl_panel_hinv: panelhinvgrp {
> +		fsl,pins = <
> +			MX8MM_IOMUXC_SAI5_RXD3_GPIO3_IO24		0x19
> +		>;
> +	};
> +
> +	pinctrl_panel_rst: panelrstgrp {
> +		fsl,pins = <
> +			MX8MM_IOMUXC_SAI5_RXC_GPIO3_IO20		0x19
> +		>;
> +	};
> +
> +	pinctrl_panel_stby: panelstbygrp {
> +		fsl,pins = <
> +			MX8MM_IOMUXC_SAI5_RXD0_GPIO3_IO21		0x19
> +		>;
> +	};
> +
> +	pinctrl_panel_vinv: panelvinvgrp {
> +		fsl,pins = <
> +			MX8MM_IOMUXC_SAI5_MCLK_GPIO3_IO25		0x19
> +		>;
> +	};
> +
> +	pinctrl_pwm1: pwm1grp {
> +		fsl,pins = <
> +			MX8MM_IOMUXC_SPDIF_EXT_CLK_PWM1_OUT		0x6
> +		>;
> +	};
> +
> +	pinctrl_touch: touchgrp {
> +		fsl,pins = <
> +			MX8MM_IOMUXC_SAI5_RXD1_GPIO3_IO22		0x19
> +			MX8MM_IOMUXC_SAI5_RXD2_GPIO3_IO23		0x19
> +		>;
> +	};
> +};
> -- 
> 2.45.2
> 

Re: [PATCH 4/4] arm64: dts: imx8mm-kontron: Add DL (Display-Line) overlay with LVDS support

[Frieder Schrempf]

Hi Shawn,

On 28.08.24 4:56 AM, Shawn Guo wrote:
> On Tue, Aug 06, 2024 at 03:33:02PM +0200, Frieder Schrempf wrote:
>> From: Frieder Schrempf <frieder.schrempf@kontron.de>
>>
>> The Kontron Electronics DL i.MX8MM consists of the BL i.MX8MM board
>> and a 7" LVDS panel. Provide an overlay that enables the panel.
>>
>> Signed-off-by: Frieder Schrempf <frieder.schrempf@kontron.de>
>> ---
>> Note: This currently throws the following warnings:
>>
>> Warning (graph_port): /fragment@3: graph port node name should be 'port'
>> Warning (graph_endpoint): /fragment@3/__overlay__: graph endpoint node name should be 'endpoint'
>> Warning (graph_endpoint): /fragment@3/__overlay__: graph connection to node '/fragment@7/__overlay__/ports/port@0/endpoint' is not bidirectional
>>
>> There is the following commit in DTC that relaxes these checks and
>> will eventually resolve these warnings:
>>
>> 84b056a89d ("checks: relax graph checks for overlays")
>>
>> https://git.kernel.org/pub/scm/utils/dtc/dtc.git/commit/?id=84b056a89d3c5b6cf6c5eeeafd4c4b14d6333aa9
>> ---
>>  arch/arm64/boot/dts/freescale/Makefile        |   4 +
>>  .../boot/dts/freescale/imx8mm-kontron-dl.dtso | 210 ++++++++++++++++++
>>  2 files changed, 214 insertions(+)
>>  create mode 100644 arch/arm64/boot/dts/freescale/imx8mm-kontron-dl.dtso
>>
>> diff --git a/arch/arm64/boot/dts/freescale/Makefile b/arch/arm64/boot/dts/freescale/Makefile
>> index f04c22b7de72e..d8af069139920 100644
>> --- a/arch/arm64/boot/dts/freescale/Makefile
>> +++ b/arch/arm64/boot/dts/freescale/Makefile
>> @@ -244,6 +244,10 @@ dtb-$(CONFIG_ARCH_MXC) += imx93-tqma9352-mba93xxla.dtb
>>  dtb-$(CONFIG_ARCH_MXC) += imx93-var-som-symphony.dtb
>>  dtb-$(CONFIG_ARCH_MXC) += imx95-19x19-evk.dtb
>>  
>> +imx8mm-kontron-dl-dtbs			:= imx8mm-kontron-bl.dtb imx8mm-kontron-dl.dtbo
>> +
>> +dtb-$(CONFIG_ARCH_MXC) += imx8mm-kontron-dl.dtb
>> +
>>  imx8mm-venice-gw72xx-0x-imx219-dtbs	:= imx8mm-venice-gw72xx-0x.dtb imx8mm-venice-gw72xx-0x-imx219.dtbo
>>  imx8mm-venice-gw72xx-0x-rpidsi-dtbs	:= imx8mm-venice-gw72xx-0x.dtb imx8mm-venice-gw72xx-0x-rpidsi.dtbo
>>  imx8mm-venice-gw72xx-0x-rs232-rts-dtbs	:= imx8mm-venice-gw72xx-0x.dtb imx8mm-venice-gw72xx-0x-rs232-rts.dtbo
>> diff --git a/arch/arm64/boot/dts/freescale/imx8mm-kontron-dl.dtso b/arch/arm64/boot/dts/freescale/imx8mm-kontron-dl.dtso
>> new file mode 100644
>> index 0000000000000..b2d593d700e2d
>> --- /dev/null
>> +++ b/arch/arm64/boot/dts/freescale/imx8mm-kontron-dl.dtso
>> @@ -0,0 +1,210 @@
>> +// SPDX-License-Identifier: GPL-2.0
>> +/*
>> + * Copyright (C) 2023 Kontron Electronics GmbH
> 
> 2024?
> 
>> + */
>> +
>> +/dts-v1/;
>> +/plugin/;
>> +
>> +#include <dt-bindings/gpio/gpio.h>
>> +#include "imx8mm-pinfunc.h"
>> +
>> +&{/} {
>> +	compatible = "kontron,imx8mm-bl", "kontron,imx8mm-sl", "fsl,imx8mm";
> 
> Not sure we need compatible in overlay.

I've seen discussions around this elsewhere. We don't need it, but it
seems a nice way to express which base DT this overlay is intended to be
applied to.

Anyway, I can remove the compatible for now. Your other comments will be
fixed in v2 as well.

Thanks
Frieder

Re: [PATCH 4/4] arm64: dts: imx8mm-kontron: Add DL (Display-Line) overlay with LVDS support

[Frieder Schrempf]

On 28.08.24 9:27 AM, Frieder Schrempf wrote:
> Hi Shawn,
> 
> On 28.08.24 4:56 AM, Shawn Guo wrote:
>> On Tue, Aug 06, 2024 at 03:33:02PM +0200, Frieder Schrempf wrote:
>>> From: Frieder Schrempf <frieder.schrempf@kontron.de>
>>>
>>> The Kontron Electronics DL i.MX8MM consists of the BL i.MX8MM board
>>> and a 7" LVDS panel. Provide an overlay that enables the panel.
>>>
>>> Signed-off-by: Frieder Schrempf <frieder.schrempf@kontron.de>
>>> ---
>>> Note: This currently throws the following warnings:
>>>
>>> Warning (graph_port): /fragment@3: graph port node name should be 'port'
>>> Warning (graph_endpoint): /fragment@3/__overlay__: graph endpoint node name should be 'endpoint'
>>> Warning (graph_endpoint): /fragment@3/__overlay__: graph connection to node '/fragment@7/__overlay__/ports/port@0/endpoint' is not bidirectional
>>>
>>> There is the following commit in DTC that relaxes these checks and
>>> will eventually resolve these warnings:
>>>
>>> 84b056a89d ("checks: relax graph checks for overlays")
>>>
>>> https://git.kernel.org/pub/scm/utils/dtc/dtc.git/commit/?id=84b056a89d3c5b6cf6c5eeeafd4c4b14d6333aa9
>>> ---
>>>  arch/arm64/boot/dts/freescale/Makefile        |   4 +
>>>  .../boot/dts/freescale/imx8mm-kontron-dl.dtso | 210 ++++++++++++++++++
>>>  2 files changed, 214 insertions(+)
>>>  create mode 100644 arch/arm64/boot/dts/freescale/imx8mm-kontron-dl.dtso
>>>
>>> diff --git a/arch/arm64/boot/dts/freescale/Makefile b/arch/arm64/boot/dts/freescale/Makefile
>>> index f04c22b7de72e..d8af069139920 100644
>>> --- a/arch/arm64/boot/dts/freescale/Makefile
>>> +++ b/arch/arm64/boot/dts/freescale/Makefile
>>> @@ -244,6 +244,10 @@ dtb-$(CONFIG_ARCH_MXC) += imx93-tqma9352-mba93xxla.dtb
>>>  dtb-$(CONFIG_ARCH_MXC) += imx93-var-som-symphony.dtb
>>>  dtb-$(CONFIG_ARCH_MXC) += imx95-19x19-evk.dtb
>>>  
>>> +imx8mm-kontron-dl-dtbs			:= imx8mm-kontron-bl.dtb imx8mm-kontron-dl.dtbo
>>> +
>>> +dtb-$(CONFIG_ARCH_MXC) += imx8mm-kontron-dl.dtb
>>> +
>>>  imx8mm-venice-gw72xx-0x-imx219-dtbs	:= imx8mm-venice-gw72xx-0x.dtb imx8mm-venice-gw72xx-0x-imx219.dtbo
>>>  imx8mm-venice-gw72xx-0x-rpidsi-dtbs	:= imx8mm-venice-gw72xx-0x.dtb imx8mm-venice-gw72xx-0x-rpidsi.dtbo
>>>  imx8mm-venice-gw72xx-0x-rs232-rts-dtbs	:= imx8mm-venice-gw72xx-0x.dtb imx8mm-venice-gw72xx-0x-rs232-rts.dtbo
>>> diff --git a/arch/arm64/boot/dts/freescale/imx8mm-kontron-dl.dtso b/arch/arm64/boot/dts/freescale/imx8mm-kontron-dl.dtso
>>> new file mode 100644
>>> index 0000000000000..b2d593d700e2d
>>> --- /dev/null
>>> +++ b/arch/arm64/boot/dts/freescale/imx8mm-kontron-dl.dtso
>>> @@ -0,0 +1,210 @@
>>> +// SPDX-License-Identifier: GPL-2.0
>>> +/*
>>> + * Copyright (C) 2023 Kontron Electronics GmbH
>>
>> 2024?
>>
>>> + */
>>> +
>>> +/dts-v1/;
>>> +/plugin/;
>>> +
>>> +#include <dt-bindings/gpio/gpio.h>
>>> +#include "imx8mm-pinfunc.h"
>>> +
>>> +&{/} {
>>> +	compatible = "kontron,imx8mm-bl", "kontron,imx8mm-sl", "fsl,imx8mm";
>>
>> Not sure we need compatible in overlay.
> 
> I've seen discussions around this elsewhere. We don't need it, but it
> seems a nice way to express which base DT this overlay is intended to be
> applied to.
> 
> Anyway, I can remove the compatible for now. Your other comments will be
> fixed in v2 as well.

For whatever reasons, the build for the combined DT + overlay works only
if the compatible is in place. Therefore I will keep it.

DTC_FLAGS=-@ make ARCH=arm64 CHECK_DTBS=y
CROSS_COMPILE=aarch64-linux-gnu- -j16 freescale/imx8mm-kontron-dl.dtb

  DTOVLCH arch/arm64/boot/dts/freescale/imx8mm-kontron-dl.dtb

Failed to apply 'arch/arm64/boot/dts/freescale/imx8mm-kontron-dl.dtbo':
FDT_ERR_NOTFOUND