PI TFT43-DIP

[Emmanuel]

Hello,

Is there any configuration documents like pins map or dts overlay parameters (using vc4-kms-dpi-generic with bad results) for using the PI TFT43-DIP on raspberry pi 3 ?

Thank you

Emmanuel

[BIQU info]

On 7/8/2022 at 1:51 PM, Emmanuel said:

Hello,

Is there any configuration documents like pins map or dts overlay parameters (using vc4-kms-dpi-generic with bad results) for using the PI TFT43-DIP on raspberry pi 3 ?

Thank you

Emmanuel

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[Emmanuel]

Hi

Y'd managed it to work on Debian Bullseye (rpi zero 2w an rpi 3b) with these parameters in /boot/config.txt :

# Disable compensation for displays with overscan
disable_overscan=1

# Enable DRM VC4 V3D driver
dtoverlay=vc4-kms-v3d
max_framebuffers=2

dtoverlay=vc4-kms-dpi-generic
dtparam=rgb666-padhi
dtparam=backlight-gpio=19

dtoverlay=bttpitft43dip-touch

and this custom dts for the touch :

/*
 * bttpitft43dip-touch.dts
 */

/dts-v1/;
/plugin/;

/ {
	compatible = "brcm,bcm2835";

	fragment@0 {
		target-path = "/";
		__overlay__ {
			i2c_gpio: i2c@0 {
				compatible = "i2c-gpio";
				gpios = <&gpio 10 0 /* sda */
					 &gpio 11 0>; /* scl */
				i2c-gpio,delay-us = <4>;        /* ~100 kHz */
				#address-cells = <1>;
				#size-cells = <0>;
			};
		};
	};

	fragment@1 {
		target = <&i2c_gpio>;
		__overlay__ {
			/* needed to avoid dtc warning */
			#address-cells = <1>;
			#size-cells = <0>;
			ft6236_14: ft6236@14 {
				compatible = "goodix,gt911";
				reg = <0x14>;
				interrupt-parent = <&gpio>;
				interrupts = <27 2>;
				touchscreen-size-x = <800>;
				touchscreen-size-y = <480>;
				touchscreen-x-mm = <95>;
				touchscreen-y-mm = <54>;
			};

			ft6236_5d: ft6236@5d {
				compatible = "goodix,gt911";
				reg = <0x5d>;
				interrupt-parent = <&gpio>;
				interrupts = <27 2>;
				touchscreen-size-x = <800>;
				touchscreen-size-y = <480>;
				touchscreen-x-mm = <95>;
				touchscreen-y-mm = <54>;
			};
		};
	};
};

bye