Device tree for mainline linux which enables use of MIPI-DSI and edp?

Edge
1

Hello, is there an example dts which enables the lcd for mainline linux 5.x?

The device tree for 4.x and Android is very different from Linux 5.x. I would like to get the touchscreen lcd working with linux. I have both the khadas MIPI-DSI screen and another, edp screen I can test with.

I understand the basics of the device tree, but not enough. I know I need a panel entry in addition to enable NG MIPI-DSI anc edp. I see there is no edp entry at all in the mainline dts.

Any clues would be appreciated

2

I see the dsi for the touch screen here, but I somehow doubt that it will play nicely with the dts from mainline.

3

By contrast, the pine book pro only has this to turn on the edp panel. I’m still studying the rest…

/dts-v1/;
#include <dt-bindings/input/gpio-keys.h>
#include <dt-bindings/input/linux-event-codes.h>
#include <dt-bindings/pwm/pwm.h>
#include <dt-bindings/usb/pd.h>
#include <dt-bindings/leds/common.h>
#include “rk3399.dtsi”
#include “rk3399-opp.dtsi”

/ {
model = “Pine64 Pinebook Pro”;
compatible = “pine64,pinebook-pro”, “rockchip,rk3399”;

chosen {
	stdout-path = "serial2:1500000n8";
};

backlight: edp-backlight {
	compatible = "pwm-backlight";
	power-supply = <&vcc_12v>;
	pwms = <&pwm0 0 740740 0>;
};

edp_panel: edp-panel {
	compatible = "boe,nv140fhmn49";
	backlight = <&backlight>;
	enable-gpios = <&gpio1 RK_PA0 GPIO_ACTIVE_HIGH>;
	pinctrl-names = "default";
	pinctrl-0 = <&panel_en_gpio>;
	power-supply = <&vcc3v3_panel>;

	ports {
		#address-cells = <1>;
		#size-cells = <0>;

		port@0 {
			reg = <0>;
			#address-cells = <1>;
			#size-cells = <0>;

			panel_in_edp: endpoint@0 {
				reg = <0>;
				remote-endpoint = <&edp_out_panel>;
			};
		};
	};
};

That is kernel 5.6, and it seems me that the device is understood by this kernel.

4

I’m wondering if I just the chip/driver if I could Thang the driver entry from this boe,nv140fhmn49 to whatever needs to be, presuming we have drivers available.

5

Did you find the solution for you issue? I was searching for an esp display (maybe from my broken PineBook Pro) to use with Khadas Edge-V (MAX) as Photo Frame.
I am not sure if I can use PineBook Pro display with edge-v but if that should work, I would need that device tree configuration file.

I found the patchset for rk3399

https://lkml.org/lkml/2020/3/5/320

6

I have not. Khadas never responded. The pine book screen should work with the proper dts. I examined the pine book dts. I think it should be close if the address interrupts were updated to match the khadas board.
I havent had the time to spend on it.
Eric