CM3 + CM3IO eDP configuration

sebsd · July 4, 2022, 3:09am

Hi, using the CM3 with IO board, how do I configure eDP DTS and timing?

Stephen · July 4, 2022, 11:39am

Hello, we have brought up Sharp LQ133T1JW01 EDP LCD on Radxa CM3 IO.

This is the dts. Hope it helps you.

radxa/kernel/blob/stable-4.19-rock3/arch/arm64/boot/dts/rockchip/radxa-cm3-io-sharp-lq133t1jw01-edp-lcd.dtsi

// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
/*
 * Copyright (c) 2022 Radxa Limited.
 *
 */

/ {
	compatible = "radxa,radxa-cm3-io", "rockchip,rk3566";

	backlight_edp: backlight-edp {
		status = "disabled";
		compatible = "pwm-backlight";
		pwms = <&pwm5 0 25000 0>;
		brightness-levels = <
			  0  20  20  21  21  22  22  23
			 23  24  24  25  25  26  26  27
			 27  28  28  29  29  30  30  31
			 31  32  32  33  33  34  34  35
			 35  36  36  37  37  38  38  39
			 40  41  42  43  44  45  46  47

This file has been truncated. show original

sebsd · July 5, 2022, 9:13am

Thanks, I have attempted to compile a .dtbo overlay with the appropriate settings changes and included it in the uEnv.txt but cant get it to work, I might will email you the .dtbo and panel datasheet to help troubleshoot.

yaqwsx · September 7, 2022, 6:54am

Hi @sebsd. Did you make any progress? I am also trying to setup eDP panel with not much luck so far.