¶ HDMI 屏幕
- 工程默认打开了hdmi和mipi两种显示，这会导致hdmi默认使用了mipi配置的分辨率，将route_dsi0和dsi0去使能, 如下图:
&route_dsi0 {
status = "okay";
};
&dsi0 {
status = "okay";
dsi0_panel: panel@0 {
.....
- 显示效果：
¶ 7寸MIPI屏
YYT-MIPI7LCD2203 是一个5点电容触控、7英寸彩色 TFT-LCD 模块。该模块由以下部分组成，TFT LCD 面板、驱动电路、5点电容触控和背光。
其中 5 点电容触控拥有 26 个驱动通道和 14 个感应通道，能够满足更高的 touch 精度要求。可以同时识别 5 个触摸点位的实时准确位置、移动轨迹及触摸面积。并根据主控需求，读取相应点数的触摸信息。
YY3568提供了两个DSI接口，分别为：DSI0和DSI1，一下我们以DSI1的配置来描述。
7寸MIPI屏我们需要控制一些引脚才能点亮屏幕，屏幕硬件原理图如下：
- 背光引脚：LCD1_BL_PWM5
- 背光使能引脚：GPIO3_A5
- 使能引脚：GPIO4_D2
- 复位引脚：GPIO3_A2
YYT-MIPI7LCD2203驱动的设备树配置rk3568-vp1-mipi-dsi1-1024x768.dtsi.
我们需要根据YYT-MIPI7LCD2203屏幕的配置更新dsi1节点：
- 屏幕固件参数：panel-init-sequence
- 屏幕显示参数：disp_timings1
- 屏幕使能引脚：enable-gpios
- 屏幕复位引脚：reset-gpios
&dsi1 {
status = "okay";
dsi1_panel: panel@0 {
status = "okay";
compatible = "simple-panel-dsi";
reg = <0>;
backlight = <&backlight1>;
enable-gpios = <&gpio4 RK_PD2 GPIO_ACTIVE_LOW>;
reset-gpios = <&gpio3 RK_PA2 GPIO_ACTIVE_LOW>;
reset-delay-ms = <60>;
enable-delay-ms = <60>;
prepare-delay-ms = <60>;
unprepare-delay-ms = <60>;
disable-delay-ms = <60>;
dsi,flags = <(MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST |
MIPI_DSI_MODE_LPM | MIPI_DSI_MODE_EOT_PACKET)>;
dsi,format = <MIPI_DSI_FMT_RGB888>;
dsi,lanes = <4>;
panel-init-sequence = [
15 00 02 80 ac
15 00 02 81 b8
15 00 02 82 09
15 00 02 83 78
15 00 02 84 7f
15 00 02 85 bb
15 00 02 86 70
];
panel-exit-sequence = [
05 00 01 28
05 00 01 10
];
disp_timings1: display-timings {
native-mode = <&dsi1_timing0>;
dsi1_timing0: timing0 {
clock-frequency = <65000000>;
hactive = <1024>;
vactive = <600>;
hfront-porch = <160>;
hback-porch = <160>;
hsync-len = <10>;
vfront-porch = <12>;
vsync-len = <1>;
vback-porch = <23>;
hsync-active = <0>;
vsync-active = <0>;
de-active = <1>;
pixelclk-active = <0>;
};
};
ports {
#address-cells = <1>;
#size-cells = <0>;
port@0 {
reg = <0>;
panel_in_dsi1: endpoint {
remote-endpoint = <&dsi1_out_panel>;
};
};
};
};
ports {
#address-cells = <1>;
#size-cells = <0>;
port@1 {
reg = <1>;
dsi1_out_panel: endpoint {
remote-endpoint = <&panel_in_dsi1>;
};
};
};
};
屏幕背光配置：
- 背光使能引脚：enable-gpios
- 使能背光调节pwm：pwm5
&backlight1 {
status = "okay";
enable-gpios = <&gpio3 RK_PA5 GPIO_ACTIVE_HIGH>;
};
&pwm5 {
status = "okay";
};
设置输出屏幕输出端口到vp1：
&route_dsi1 {
status = "okay";
connect = <&vp1_out_dsi1>;
};
显示结果：
¶ 触摸驱动
由原理图上看，mipi dsi1屏幕的触摸芯片接在i2c5上，触摸芯片采用gt911芯片，参数如下：
- i2c地址为：0x5d
- 屏幕分辨率为：1024 * 600
- 中断引脚：GPIO0-C1
- 复位引脚：GPIO3-A0
&i2c5{
status = "okay";
gt9xx: gt9xx@5d {
compatible = "goodix,gt9xx";
reg = <0x5d>;
touch-gpio = <&gpio0 RK_PC1 IRQ_TYPE_EDGE_RISING>;
reset-gpio = <&gpio3 RK_PA0 GPIO_ACTIVE_LOW>;
max-x = <1024>;
max-y = <600>;
tp-size = <911>;
pinctrl-names = "default";
pinctrl-0 = <&touch_gpio>;
//tp-supply = <&vcc_io>;
status = "okay";
};
};
&pinctrl {
touch {
touch_gpio: touch-gpio {
rockchip,pins =
<0 RK_PC1 RK_FUNC_GPIO &pcfg_pull_up>,
<3 RK_PA0 RK_FUNC_GPIO &pcfg_pull_none>;
};
};
};
通过menuconfig打开gt911的驱动：
│ Location: │
│ -> Device Drivers │
│ -> Input device support │
│ -> Generic input layer (needed for keyboard, mouse, ...) (INPUT [=y]) │
│ -> Touchscreens (INPUT_TOUCHSCREEN [=y])
¶ 11.6寸EDP屏
youyeetoo EDP 屏一个5点电容触控、11.6 英寸彩色 TFT-LCD。具有FHD（全高清）分辨率（1920水平×1080垂直像素阵列），
可显示 16.7M（1670万） 种色彩，接近人眼分辨的极限。具有显示画面色彩丰富，层次感好，色彩过渡自然，色彩表现力好，
屏幕细腻等优点。并且屏幕重量仅有96.6g。
11.6寸EDP屏我们需要控制一些引脚才能点亮屏幕，屏幕硬件原理图如下：
- 背光引脚：LCD1_BL_PWM14
- 背光使能引脚：GPIO1_A4
YYT-MIPI7LCD2203驱动的设备树配置rk3568-vp1-edp-1080p.dtsi.
我们需要根据YYT-MIPI7LCD2203屏幕的配置更新dsi1节点：
- 屏幕固件参数：panel-init-sequence
- 屏幕显示参数：display-timings
- 屏幕使能引脚：enable-gpios
- 屏幕复位引脚：reset-gpios
edp_panel {
compatible = "simple-panel";
backlight = <&backlight>;
//power-supply = <&vcc3v3_lcd0_n>;
prepare-delay-ms = <120>;
enable-delay-ms = <120>;
unprepare-delay-ms = <120>;
disable-delay-ms = <120>;
display-timings {
native-mode = <&edp_timing>;
edp_timing: timing0 {
clock-frequency = <138500000>;
hactive = <1920>;
vactive = <1080>;
hfront-porch = <64>;
hsync-len = <32>;
hback-porch = <64>;
vfront-porch = <12>;
vsync-len = <7>;
vback-porch = <12>;
hsync-active = <0>;
vsync-active = <0>;
de-active = <0>;
pixelclk-active = <0>;
};
};
port {
panel_in_edp: endpoint {
remote-endpoint = <&edp_out_panel>;
};
};
};
&edp {
status = "okay";
force-hpd;
ports {
port@1 {
reg = <1>;
edp_out_panel: endpoint {
remote-endpoint = <&panel_in_edp>;
};
};
};
};
屏幕背光配置：
- 背光使能引脚：enable-gpios
- 使能背光调节pwm：pwm14
&backlight {
status = "okay";
pwms = <&pwm14 0 25000 0>;
enable-gpios = <&gpio1 RK_PA4 GPIO_ACTIVE_HIGH>;
};
&pwm14 {
status = "okay";
};
设置输出屏幕输出端口到vp1：
&route_edp {
status = "okay";
connect = <&vp1_out_edp>;
};
显示结果：
¶ 触摸驱动
由原理图上看，EDP屏幕的触摸芯片接在i2c1上，触摸芯片采用gt911芯片，参数如下：
- i2c地址为：0x5d
- 屏幕分辨率为：1920 * 1080
- 中断引脚：GPIO0-B7
- 复位引脚：GPIO3-A6
&i2c1 {
status = "okay";
gt9xx: gt9xx@5d {
compatible = "goodix,gt9xx";
reg = <0x5d>;
touch-gpio = <&gpio0 RK_PB7 IRQ_TYPE_EDGE_RISING>;
reset-gpio = <&gpio0 RK_PA6 GPIO_ACTIVE_LOW>;
max-x = <1920>;
max-y = <1080>;
tp-size = <928>;
pinctrl-names = "default";
pinctrl-0 = <&touch_gpio>;
//tp-supply = <&vcc_io>;
status = "okay";
};
};
&pinctrl {
touch {
touch_gpio: touch-gpio {
rockchip,pins =
<0 RK_PB7 RK_FUNC_GPIO &pcfg_pull_up>,
<0 RK_PA6 RK_FUNC_GPIO &pcfg_pull_none>;
};
};
};
通过menuconfig打开gt911的驱动：
│ Location: │
│ -> Device Drivers │
│ -> Input device support │
│ -> Generic input layer (needed for keyboard, mouse, ...) (INPUT [=y]) │
│ -> Touchscreens (INPUT_TOUCHSCREEN [=y])