LCD

RK3568 配备四路显示输出接口，分别为 HDMI、MIPI、LVDS、EDP，其中最高支持三路同时显示输出

1. 显示接口资源介绍

RK3568

RK3568 有三个VP节点，每个VP节点可挂接一个显示屏，对应关系如下表格示

VP编号

VP支持显示接口

VP最大分辨率

VP0

MIPI0 / MIPI1 / HDMI / EDP

4096x2304@60Hz

VP1

MIPI0 / MIPI1 / LVDS / HDMI / EDP

2048x1536@60Hz

VP2

LVDS / RGB

1920x1080@60Hz

MIPI0与LVDS接口引脚冲突，只能二选一
VP2节点仅支持LVDS/RGB，所以三屏显示时其中一路必须是LVDS（RGB接口未引出）

显示接口

显示最大分辨率

格式

HDMI

4096x2160@60Hz

RGB/YUV420 10Bit

MIPI

1920x1080@60Hz

RGB 8Bit

Dual MIPI

2560x1440@60Hz

RGB 8Bit

LVDS

1280x800@60Hz

RGB 8Bit

EDP

2560x1600@60Hz

RGB 10Bit

RGB

1920x1080@60Hz

RGB 8Bit

2. 单显示屏驱动配置

显示屏配置主要修改设备树LCD配置文件，RK3568 设备树LCD配置目录如下：

$ vim kernel/arch/arm64/boot/dts/rockchip/rk3568-kickpi-k1.dtsi //linux
$ vim kernel-5.10/arch/arm64/boot/dts/rockchip/rk3568-kickpi-k1.dtsi //android

// LCD
#include "rk3568-kickpi-lcd-hdmi.dtsi"
//#include "rk3568-kickpi-lcd-edp-15.6-1920-1080.dtsi"
//#include "rk3568-kickpi-lcd-mipi0-10.1-800-1280.dtsi"
//#include "rk3568-kickpi-lcd-mipi1-10.1-800-1280.dtsi"
//#include "rk3568-kickpi-lcd-mipi0-10.1-800-1280-v2.dtsi"
//#include "rk3568-kickpi-lcd-mipi1-10.1-800-1280-v2.dtsi"
//#include "rk3568-kickpi-lcd-lvds0-7-1024-600.dtsi"
//#include "rk3568-kickpi-lcd-lvds1-7-1024-600.dtsi"
//#include "rk3568-kickpi-lcd-mipi0-5-720-1280.dtsi"
//#include "rk3568-kickpi-lcd-mipi1-5-720-1280.dtsi"
// #include "rk3568-kickpi-lcd-mipi0-8-800-1280.dtsi"
//#include "rk3568-kickpi-lcd-mipi1-8-800-1280.dtsi"

其中的rk3568-kickpi-lcd-hdmi.dtsi需要默认保持使能
若显示屏调试有问题，可联系售后，获取技术支持

屏幕设备树名称介绍

(CPU类型)-kickpi-lcd-(接口)-(英寸)-(宽)-(高).dtsi

3. 多屏显示系统配置

多屏显示方案中，LCD参数选择注意事项：

推荐选择显示长宽比例一致的显示屏，否则会出现画面拉伸或者画面黑边

内核设备树配置

$ vim kernel/arch/arm64/boot/dts/rockchip/rk3568-kickpi-k1.dtsi

// Triple LCD
//#include "rk3568-kickpi-triple-lcd-hdmi-mipi1-lvds.dtsi"
//#include "rk3568-kickpi-triple-lcd-edp-mipi1-lvds.dtsi"

在完成单屏调试的基础上，参考以上提供的多屏设备树配置文件

Android多屏配置

DSI作为主屏，HDMI-A作为副屏

PRODUCT_PROPERTY_OVERRIDES += vendor.hwc.device.primary=DSI
PRODUCT_PROPERTY_OVERRIDES += vendor.hwc.device.extend=HDMI-A

DSI\eDP作为主屏，LVDS\HDMI-A作为副屏

PRODUCT_PROPERTY_OVERRIDES += vendor.hwc.device.primary=DSI,eDP
PRODUCT_PROPERTY_OVERRIDES += vendor.hwc.device.extend=LVDS,HDMI-A

4. 单触摸屏驱动配置

以GT9XX为例

驱动移植

将厂商提供的驱动移植进SDK目录，并修改添加进编译文件

驱动文件copy到触摸驱动的文件夹下$(SDK_DIR)\kernel-5.10\drivers\input\touchscreen

修改kconfig：添加如下

config TOUCHSCREEN_GT9XX
	tristate "GT9XX touchscreens support"

修改Makefile：添加如下

obj-$(CONFIG_TOUCHSCREEN_GT9XX)		+= gt9xx/

内核配置添加CONFIG_TOUCHSCREEN_GT9XX=y

内核配置文件如arch/arm64/configs/rockchip_defconfig，不同版本的defconfig请自行在git历史记录中查找对应的版本文件

内核设备树配置

i2c_gt9xx配置：

&i2c1 {
	status = "okay";
	gt9xx:gt9xx@5d {
		compatible = "goodix,gt9xx";
		status = "okay";
		reg = <0x5d>;

		gtp_resolution_x = <1024>;
		gtp_resolution_y = <600>;
		gtp_int_tarigger = <1>;
		gtp_change_x2y = <0>;
		gtp_overturn_x = <0>;
		gtp_overturn_y = <0>;
		gtp_send_cfg = <1>;
		gtp_touch_wakeup = <1>;
		goodix_rst_gpio = <&gpio0 RK_PB6 GPIO_ACTIVE_HIGH>;
		goodix_irq_gpio = <&gpio3 RK_PA3 IRQ_TYPE_LEVEL_LOW>;
		pinctrl-names = "default";
		pinctrl-0 = <&touch3_gpio>;

		goodix,cfg-group0 = [
			4B 00 04 58 02 01 0D 00 01 08
			28 05 50 32 03 05 00 00 00 00
			00 00 00 00 00 00 00 8B 2A 0C
			17 15 31 0D 00 00 02 BA 03 2D
			00 00 00 00 00 03 00 00 00 00
			00 0F 41 94 C5 02 07 00 00 04
			9B 11 00 77 17 00 5C 1F 00 48
			2A 00 3B 38 00 3B 00 00 00 00
			00 00 00 00 00 00 00 00 00 00
			00 00 00 00 00 00 00 00 00 00
			00 00 00 00 00 00 00 00 00 00
			00 00 02 04 06 08 0A 0C 0E 10
			12 14 16 18 FF FF 00 00 00 00
			00 00 00 00 00 00 00 00 00 00
			00 00 00 02 04 06 08 0A 0C 0F
			10 12 13 16 18 1C 1D 1E 1F 20
			21 22 24 FF FF FF FF FF 00 00
			00 00 00 00 00 00 00 00 00 00
			00 00 00 00 B6 01
		];
	};
};

旋转触摸方向

基于设备树调整触摸屏方向，以下方向仅适用于GT9XX驱动

0度（默认）

gt9xx:gt9xx@5d {
	gtp_change_x2y = <0>;		
	gtp_overturn_x = <0>;
	gtp_overturn_y = <0>;
};

90度

gt9xx:gt9xx@5d {
	gtp_change_x2y = <1>;
	gtp_overturn_x = <1>;
	gtp_overturn_y = <0>;
};

180度

gt9xx:gt9xx@5d {
	gtp_change_x2y = <0>;
	gtp_overturn_x = <0>;
	gtp_overturn_y = <1>;
};

270度

gt9xx:gt9xx@5d {
	gtp_change_x2y = <0>;
	gtp_overturn_x = <1>;
	gtp_overturn_y = <0>;
};

5. 多屏触摸系统配置

内核设备树配置

I2C + I2C

Android单屏触摸配置

Android13.0

禁止副屏触摸，不论external 或 internal类型设备，都作用在主屏

$ vim frameworks/native/services/inputflinger/reader/EventHub.cpp

    // Determine whether the device is external or internal.
    if (isExternalDeviceLocked(device)) {
-        device->classes |= INPUT_DEVICE_CLASS_EXTERNAL;
+        //device->classes |= INPUT_DEVICE_CLASS_EXTERNAL;
    }

Android多屏触摸配置

判断设备名称

$ vim frameworks/native/services/inputflinger/reader/EventHub.cpp

bool EventHub::isExternalDeviceLocked(Device* device) {
+	const char *I2C_DEVICE_NAME = "generic ft5x06 (79)";
+	ALOGE("input deviceis '%s' ",device->identifier.name.c_str());
+	if (strcmp(device->identifier.name.c_str(), I2C_DEVICE_NAME) == 0) {
+		return true;
+	}

	if (device->configuration) {
	bool value;
}

添加IDC配置文件

Last updated 1 month ago