技术专栏
RK3568 android11.0 LCD多屏配置
RK3568支持三屏显示，显示屏DTS配置划分为三部分：LCD参数配置，LCD引脚配置，VP通道配置
- LCD参数配置根据单屏显示参数移植即可
- LCD引脚配置，包括RST, PWR, PWM
注：若不同通道的屏，使用相同的引脚，只需要在其中一个屏中控制；若同时配置的话，则会uboot启动失败.
常用调试命令：
adb root
adb remount
adb shell
#getprop | grep hw //查看屏配置
#cat /d/dri/0/summary //查看vop绑定情况
adb shell settings get system screen_brightness //获取当前亮度值
adb shell settings put system screen_brightness 150 //更改亮度值（亮度值在0—255之间）
一. LCD参数配置
1. lvds显示配置
&lvds_panel {
status = "okay";
compatible = "simple-panel";
backlight = <&backlight4>; //背光
enable-delay-ms = <20>;
prepare-delay-ms = <20>;
unprepare-delay-ms = <20>;
disable-delay-ms = <20>;
bus-format = <MEDIA_BUS_FMT_RGB666_1X7X3_SPWG>; //MEDIA_BUS_FMT_RGB666_1X7X3_JEIDA
width-mm = <217>;
height-mm = <136>;
display-timings {
native-mode = <&timing2>;
timing2: timing2 {
clock-frequency = <45000000>;
hactive = <1024>;
vactive = <600>;
hback-porch = <160>;
hfront-porch = <160>;
vback-porch = <23>;
vfront-porch = <12>;
hsync-len = <20>;
vsync-len = <3>;
hsync-active = <0>;
vsync-active = <0>;
de-active = <0>;
pixelclk-active = <0>;
};
};
ports {
#address-cells = <1>;
#size-cells = <0>;
port@0 {
reg = <0>;
dual-lvds-even-pixels;
panel_in_lvds: endpoint {
remote-endpoint = <&lvds_out_panel>;
};
};
};
};
&lvds {
status = "okay";
ports {
port@1 {
reg = <1>;
lvds_out_panel: endpoint {
remote-endpoint = <&panel_in_lvds>;
};
};
};
};
&video_phy0 {
status = "okay";
};
2. dsi0显示配置
&dsi0 {
status = "okay";
rockchip,lane-rate = <480>;
dsi0_panel: panel@0 {
status = "okay";
compatible = "simple-panel-dsi";
reg = <0>;
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 = [
05 78 01 11
05 78 01 29
];
panel-exit-sequence = [
05 00 01 28
05 78 01 10
];
disp_timings0: display-timings {
native-mode = <&dsi0_timing0>;
dsi0_timing0: timing0 {
clock-frequency = <51000000>;
hactive = <1024>;
vactive = <600>;
hback-porch = <160>;
hfront-porch = <136>;
vback-porch = <16>;
vfront-porch = <16>;
hsync-len = <4>;
vsync-len = <2>;
hsync-active = <0>;
vsync-active = <0>;
de-active = <0>;
pixelclk-active = <1>;
};
};
ports {
#address-cells = <1>;
#size-cells = <0>;
port@0 {
reg = <0>;
panel_in_dsi: endpoint {
remote-endpoint = <&dsi_out_panel>;
};
};
};
};
ports {
#address-cells = <1>;
#size-cells = <0>;
port@1 {
reg = <1>;
dsi_out_panel: endpoint {
remote-endpoint = <&panel_in_dsi>;
};
};
};
};
&mipi_dphy0 {
status = "disabled"; //这个节点一定要disabled掉，不然会进不去系统；//I've been in trouble here before
};
3. dsi1显示配置
&dsi1 {
status = "okay";
//rockchip,lane-rate = <480>;
dsi1_panel: panel@0 {
status = "okay";
compatible = "simple-panel-dsi";
reg = <0>;
backlight = <&backlight5>;
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 = [
05 78 01 11
05 78 01 29
];
panel-exit-sequence = [
05 00 01 28
05 78 01 10
];
disp_timings1: display-timings {
native-mode = <&dsi1_timing0>;
dsi1_timing0: timing0 {
clock-frequency = <35000000>;
hactive = <1024>;
vactive = <600>;
hback-porch = <160>;
hfront-porch = <136>;
vback-porch = <16>;
vfront-porch = <16>;
hsync-len = <4>;
vsync-len = <2>;
hsync-active = <0>;
vsync-active = <0>;
de-active = <0>;
pixelclk-active = <1>;
};
};
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>;
};
};
};
};
&mipi_dphy1 {
status = "okay";
};
4. edp显示配置
&edp_panel {
status = "okay";
compatible = "simple-panel";
//backlight = <&backlight5>;
prepare-delay-ms = <20>;
enable-delay-ms = <20>;
disable-delay-ms = <20>;
unprepare-delay-ms = <20>;
display-timings {
native-mode = <&timing1>;
timing0: timing0 {//EDP 13.3
clock-frequency = <150000000>;
hactive = <1920>;
vactive = <1080>;
hfront-porch = <12>;
hsync-len = <16>;
hback-porch = <48>;
vfront-porch = <8>;
vsync-len = <4>;
vback-porch = <8>;
hsync-active = <0>;
vsync-active = <0>;
de-active = <0>;
pixelclk-active = <0>;
};
timing1: timing1 {// EDP 15.6 LP156WF6
clock-frequency = <138000000>;
hactive = <1920>;
vactive = <1080>;
hfront-porch = <48>;
hsync-len = <32>;
hback-porch = <80>;
vfront-porch = <3>;
vsync-len = <5>;
vback-porch = <23>;
hsync-active = <0>;
vsync-active = <0>;
de-active = <0>;
pixelclk-active = <0>;
};
};
ports {
panel_in_edp: endpoint {
remote-endpoint = <&edp_out_panel>;
};
};
};
&edp {
hpd-gpios = <&gpio0 RK_PC2 GPIO_ACTIVE_HIGH>;
status = "okay";
force-hpd;
ports {
port@1 {
reg = <1>;
edp_out_panel: endpoint {
remote-endpoint = <&panel_in_edp>;
};
};
};
};
&edp_phy {
status = "okay";
};
二. VP通道配置
RK3568支持VP0~2,每个VP通道只能配置单一显示屏，并且每个通道支持显示屏格式不一致。
1. 常用参数
VP0 : dsi0_in_vp0、dsi1_in_vp0、edp_in_vp0、hdmi_in_vp0
VP1 : dsi0_in_vp1、dsi1_in_vp1、edp_in_vp1、hdmi_in_vp1、lvds_in_vp1
VP2 : lvds_in_vp2、rgb_in_vp2
2. vp通道绑定
dsi0 + vp0
&dsi0_in_vp0 {
status = "okay";
};
&dsi0_in_vp1 {
status = "disabled";
};
&route_dsi0 {
status = "okay";
connect = <&vp0_out_dsi0>;
};
dsi1+vp0
&dsi1_in_vp0 {
status = "okay";
};
&dsi1_in_vp1 {
status = "disabled";
};
&route_dsi1 {
status = "okay";
connect = <&vp0_out_dsi1>;
};
edp+vp1
&edp_in_vp0 {
status = "disabled";
};
&edp_in_vp1 {
status = "okay";
};
&route_edp {
status = "okay";
connect = <&vp1_out_edp>;
};
lvds+vp2
&lvds_in_vp1 {
status = "disabled";
};
&lvds_in_vp2 {
status = "okay";
};
&route_lvds {
status = "okay";
connect = <&vp2_out_lvds>;
};
三. LCD引脚配置
1. RST/PWR GPIO配置
注：不论PWM，RST，PWR中任一引脚，都不能重复配置在已经使能的通道下，否则会导致uboot启动失败。
// MIPI DSI0
&dsi0_panel {
power-supply = <&vcc3v3_lcd_n>;
reset-gpios = <&gpio4 RK_PD2 GPIO_ACTIVE_LOW>; // 屏reset脚gpio口
pinctrl-names = "default";
pinctrl-0 = <&lcd_rst_gpio>;
backlight = <&backlight4>;
};
// MIPI DSI1
&dsi1_panel {
power-supply = <&vcc3v3_lcd_n>;
reset-gpios = <&gpio4 RK_PD2 GPIO_ACTIVE_LOW>;
pinctrl-names = "default";
pinctrl-0 = <&lcd_rst_gpio>;
backlight = <&backlight5>;
};
// LVDS
&lvds_panel {
power-supply = <&vcc3v3_lcd_n>;
reset-gpios = <&gpio4 RK_PD2 GPIO_ACTIVE_LOW>;
pinctrl-names = "default";
pinctrl-0 = <&lcd_rst_gpio>;
backlight = <&backlight4>;
};
// EDP
&edp_panel {
power-supply = <&vcc3v3_lcd_n>;
backlight = <&backlight5>;
};
// POWER GPIO
&vcc3v3_lcd_n {
gpio = <&gpio0 RK_PC7 GPIO_ACTIVE_HIGH>; //屏PWR_EN脚gpio口
enable-active-high;
};
&pinctrl {
lcd1 {
lcd_rst_gpio: lcd1-rst-gpio {
rockchip,pins = <4 RK_PD2 RK_FUNC_GPIO &pcfg_pull_none>; //up,down
};
};
};
2. PWM配置
dts中同时使能PWM4,PWM5,根据原理图在对应的LCD中直接引用即可。
/ {
backlight4: backlight4 {
compatible = "pwm-backlight";
pwms = <&pwm4 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
48 49 50 51 52 53 54 55
56 57 58 59 60 61 62 63
64 65 66 67 68 69 70 71
72 73 74 75 76 77 78 79
80 81 82 83 84 85 86 87
88 89 90 91 92 93 94 95
96 97 98 99 100 101 102 103
104 105 106 107 108 109 110 111
112 113 114 115 116 117 118 119
120 121 122 123 124 125 126 127
128 129 130 131 132 133 134 135
136 137 138 139 140 141 142 143
144 145 146 147 148 149 150 151
152 153 154 155 156 157 158 159
160 161 162 163 164 165 166 167
168 169 170 171 172 173 174 175
176 177 178 179 180 181 182 183
184 185 186 187 188 189 190 191
192 193 194 195 196 197 198 199
200 201 202 203 204 205 206 207
208 209 210 211 212 213 214 215
216 217 218 219 220 221 222 223
224 225 226 227 228 229 230 231
232 233 234 235 236 237 238 239
240 241 242 243 244 245 246 247
248 249 250 251 252 253 254 255
>;
default-brightness-level = <200>;
};
backlight5: backlight5 {
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
48 49 50 51 52 53 54 55
56 57 58 59 60 61 62 63
64 65 66 67 68 69 70 71
72 73 74 75 76 77 78 79
80 81 82 83 84 85 86 87
88 89 90 91 92 93 94 95
96 97 98 99 100 101 102 103
104 105 106 107 108 109 110 111
112 113 114 115 116 117 118 119
120 121 122 123 124 125 126 127
128 129 130 131 132 133 134 135
136 137 138 139 140 141 142 143
144 145 146 147 148 149 150 151
152 153 154 155 156 157 158 159
160 161 162 163 164 165 166 167
168 169 170 171 172 173 174 175
176 177 178 179 180 181 182 183
184 185 186 187 188 189 190 191
192 193 194 195 196 197 198 199
200 201 202 203 204 205 206 207
208 209 210 211 212 213 214 215
216 217 218 219 220 221 222 223
224 225 226 227 228 229 230 231
232 233 234 235 236 237 238 239
240 241 242 243 244 245 246 247
248 249 250 251 252 253 254 255
>;
default-brightness-level = <200>;
enable-gpios = <&gpio0 RK_PC6 GPIO_ACTIVE_HIGH>; // 屏背光使能脚gpio口
pinctrl-names = "default";
pinctrl-0 = <&edp_bl_en>;
};
};
&pwm4 {
status = "okay";
};
&pwm5 {
status = "okay";
};
&pinctrl {
backlight {
edp_bl_en: edp-bl-en {
rockchip,pins = <0 RK_PC6 RK_FUNC_GPIO &pcfg_pull_none>;
};
};
}
可根据实际需求来打开或关闭不需要的屏幕节点，一定要匹配VP通道对应所支持的屏幕类型，避免复用。
声明：本文内容由易百纳平台入驻作者撰写，文章观点仅代表作者本人，不代表易百纳立场。如有内容侵权或者其他问题，请联系本站进行删除。
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