一. 简介本文是基于RK3588平台MIPI屏调试总结。二. MIPI屏幕调试2.1 调试总览调试步骤分析步骤 ① 先将背光点亮步骤 ② 根据屏幕的规格书配置dsi1_panel节点步骤 ③ 打开对应的dsi节点开机logo步骤 ④ 编译烧写调试屏幕2.2 DTS配置#include rk3588-evb.dtsi //引用了dsi1_panel 节点2.2.1 步骤 ① 背光配置dsi1_backlight: dsi1-backlight { status okay; compatible pwm-backlight; pwms pwm2 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 gpio2 RK_PC2 GPIO_ACTIVE_HIGH; pinctrl-names default; pinctrl-0 dsi1_backlight_en; };2.2.2 步骤 ② 根据datasheet配置屏幕节点屏幕上电初始化时序的配置教程见 RK3588-MIPI屏幕调试笔记:RK3588-MIPI-DSI之LCD上电初始化时序屏幕的时序参数配置教程见 RK3588-MIPI屏幕调试笔记:RK3588-MIPI-DSI之屏参配置屏幕dts配置如下dsi1_panel { power-supply vcc_lcd_mipi1; //使用gpio模拟regulator reset-gpios gpio2 RK_PC1 GPIO_ACTIVE_LOW; backlight dsi1_backlight; pinctrl-names default; pinctrl-0 dsi1_lcd_rst_gpio; panel-init-sequence [ 13 00 02 B0 01 13 00 02 C0 26 13 00 02 C1 10 13 00 02 C2 0E 13 00 02 C3 00 13 00 02 C4 00 13 00 02 C5 23 13 00 02 C6 11 13 00 02 C7 22 13 00 02 C8 20 13 00 02 C9 1E 13 00 02 CA 1C 13 00 02 CB 0C 13 00 02 CC 0A 13 00 02 CD 08 13 00 02 CE 06 13 00 02 CF 18 13 00 02 D0 02 13 00 02 D1 00 13 00 02 D2 00 13 00 02 D3 00 13 00 02 D4 26 13 00 02 D5 0F 13 00 02 D6 0D 13 00 02 D7 00 13 00 02 D8 00 13 00 02 D9 23 13 00 02 DA 11 13 00 02 DB 21 13 00 02 DC 1F 13 00 02 DD 1D 13 00 02 DE 1B 13 00 02 DF 0B 13 00 02 E0 09 13 00 02 E1 07 13 00 02 E2 05 13 00 02 E3 17 13 00 02 E4 01 13 00 02 E5 00 13 00 02 E6 00 13 00 02 E7 00 13 00 02 B0 03 13 00 02 BE 04 13 00 02 B9 40 13 00 02 CC 88 13 00 02 C8 0C 13 00 02 C9 07 13 00 02 CD 01 13 00 02 CA 40 13 00 02 CE 1A 13 00 02 CF 60 13 00 02 D2 08 13 00 02 D3 08 13 00 02 DB 01 13 00 02 D9 06 13 00 02 D4 00 13 00 02 D5 01 13 00 02 D6 04 13 00 02 D7 03 13 00 02 C2 00 13 00 02 C3 0E 13 00 02 C4 00 13 00 02 C5 0E 13 00 02 DD 00 13 00 02 DE 0E 13 00 02 E6 00 13 00 02 E7 0E 13 00 02 C2 00 13 00 02 C3 0E 13 00 02 C4 00 13 00 02 C5 0E 13 00 02 DD 00 13 00 02 DE 0E 13 00 02 E6 00 13 00 02 E7 0E 13 00 02 B0 06 13 00 02 C0 A5 13 00 02 D5 1C 13 00 02 C0 00 13 00 02 B0 00 13 00 02 BD 30 13 00 02 F9 5C 13 00 02 C2 14 13 00 02 C4 14 13 00 02 BF 15 13 00 02 C0 0C 13 00 02 B0 00 13 00 02 B1 79 13 00 02 BA 8F 05 C8 01 11 05 32 01 29 ]; panel-exit-sequence [ 05 00 01 28 05 00 01 10 ]; disp_timings1: display-timings { native-mode dsi1_timing0; dsi1_timing0: timing0 { clock-frequency 159400000; //根据屏幕的时序参数表配置 hactive 1200; vactive 1920; hfront-porch 80; hsync-len 1; hback-porch 60; vfront-porch 35; vsync-len 1; vback-porch 25; hsync-active 0; vsync-active 0; de-active 0; pixelclk-active 1; }; }; };2.2.3 步骤 ③ 打开对应的dsi节点开机logo //打开背光的pwm节点 pwm2 { status okay; pinctrl-names active; pinctrl-0 pwm2m2_pins; }; //在dsi1上接了一个mipi屏这个配置开启dsi1 dsi1 { status okay; }; mipi_dcphy1 { status okay; }; //默认dsi配置vp2和vp3上面这里配置为dsi使用vp3可以根据屏的分辨率来确认使用vp2还是vp3vp2支持4Kvp3只支持 2048x1536 dsi1_in_vp2 { status disabled; }; dsi1_in_vp3 { status okay; }; //配置dsi1显示开机logo route_dsi1 { status okay; connect vp3_out_dsi1; }; 2.3 调试命令查看显示信息命令cat /sys/kernel/debug/dri/0/summary2.4 问题总结调试过程中遇到的问题一开始很久没亮测量了电源电压和波形都正常。后来换了一组板子和屏幕做对比。最后是因为屏幕的座子没焊接好二是接MIPI屏幕的排线太长会影响数据传输。换了一根短的线之后屏幕亮起。