Display 使用 RK3506 拥有 1 路 Video 输出端口。Video Port 所能输出的最大分辨率： 1280x1280@60Hz。 ROC-RK3506J-CC 显示接口的配置 下面对各个显示输出接口的配置和使用作基本的介绍，详细内容可以参考文件： kernel/arch/arm/boot/dts/rk3506b-firefly-roc-rk3506b-cc.dts kernel/arch/arm/boot/dts/rk3506b-firefly-roc-rk3506b-cc- mipi101-BSD1218-A101KL68.dtsi MIPI DSI ROC-RK3506J-CC 有一路 MIPI DSI 显示输出接口，支持 2 Lane 的数据输出， 最高可输出 1280x1280@60Hz 。 软件配置 外接的屏幕是 Firefly V3 版本屏幕 ， DSI 接口 在设备树上添加： //设置屏幕的背光 backlight: backlight { ... compatible = "pwm-backlight"; enable-gpios = <&pca9555 PCA_IO0_1 GPIO_ACTIVE_HIGH>; pwms = <&pwm0_4ch_2 0 50000 1>; status = "okay"; ... } &pwm0_4ch_2 { pinctrl-names = "active"; pinctrl-0 = <&rm_io3_pwm0_ch2>; status = "okay"; }; //设置 dsi 的开机 logo &dsi_dphy { status = "okay"; }; &dsi_in { status = "okay"; }; &dsi_in_vop { status = "okay"; }; &route_dsi { status = "okay"; }; //打开 dsi（注意这一部分较重要，涉及到屏幕的上电时序） &dsi { status = "okay"; //rockchip,lane-rate = <1000>; dsi_panel: panel@0 { status = "okay"; compatible = "simple-panel-dsi"; reg = <0>; backlight = <&backlight>; enable-gpios = <&pca9555 PCA_IO0_0 GPIO_ACTIVE_HIGH>; reset-gpios = <&pca9555 PCA_IO0_2 GPIO_ACTIVE_LOW>; enable-delay-ms = <50>; prepare-delay-ms = <200>; reset-delay-ms = <50>; init-delay-ms = <55>; unprepare-delay-ms = <50>; disable-delay-ms = <20>; mipi-data-delay-ms = <200>; size,width = <120>; size,height = <170>; dsi,flags = <(MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST | MIPI_DSI_MODE_LPM | MIPI_DSI_MODE_NO_EOT_PACKET)>; dsi,format = ; dsi,lanes = <2>; panel-init-sequence = [ 39 00 04 FF 98 81 03 15 00 02 01 00 15 00 02 02 00 15 00 02 03 55 15 00 02 04 55 15 00 02 05 03 15 00 02 06 06 15 00 02 07 00 15 00 02 08 07 15 00 02 09 00 15 00 02 0a 00 15 00 02 0b 00 15 00 02 0c 00 15 00 02 0d 00 15 00 02 0e 00 15 00 02 0f 00 15 00 02 10 00 15 00 02 11 00 15 00 02 12 00 15 00 02 13 00 15 00 02 14 00 15 00 02 15 00 15 00 02 16 00 15 00 02 17 00 15 00 02 18 00 15 00 02 19 00 15 00 02 1a 00 15 00 02 1b 00 15 00 02 1c 00 15 00 02 1d 00 15 00 02 1e C0 15 00 02 1f 80 15 00 02 20 04 15 00 02 21 03 15 00 02 22 00 15 00 02 23 00 15 00 02 24 00 15 00 02 25 00 15 00 02 26 00 15 00 02 27 00 15 00 02 28 33 15 00 02 29 33 15 00 02 2a 00 15 00 02 2b 00 15 00 02 2c 00 15 00 02 2d 00 15 00 02 2e 00 15 00 02 2f 00 15 00 02 30 00 15 00 02 31 00 15 00 02 32 00 15 00 02 33 00 15 00 02 34 04 15 00 02 35 00 15 00 02 36 00 15 00 02 37 00 15 00 02 38 3C 15 00 02 39 00 15 00 02 3a 00 15 00 02 3b 00 15 00 02 3c 00 15 00 02 3d 00 15 00 02 3e 00 15 00 02 3f 00 15 00 02 40 00 15 00 02 41 00 15 00 02 42 00 15 00 02 43 00 15 00 02 44 00 15 00 02 50 00 15 00 02 51 11 15 00 02 52 44 15 00 02 53 55 15 00 02 54 88 15 00 02 55 AB 15 00 02 56 00 15 00 02 57 11 15 00 02 58 22 15 00 02 59 33 15 00 02 5a 44 15 00 02 5b 55 15 00 02 5c 66 15 00 02 5d 77 15 00 02 5e 00 15 00 02 5f 02 15 00 02 60 02 15 00 02 61 0A 15 00 02 62 09 15 00 02 63 08 15 00 02 64 13 15 00 02 65 12 15 00 02 66 11 15 00 02 67 10 15 00 02 68 0F 15 00 02 69 0E 15 00 02 6a 0D 15 00 02 6b 0C 15 00 02 6c 06 15 00 02 6d 07 15 00 02 6e 02 15 00 02 6f 02 15 00 02 70 02 15 00 02 71 02 15 00 02 72 02 15 00 02 73 02 15 00 02 74 02 15 00 02 75 02 15 00 02 76 02 15 00 02 77 0A 15 00 02 78 06 15 00 02 79 07 15 00 02 7a 10 15 00 02 7b 11 15 00 02 7c 12 15 00 02 7d 13 15 00 02 7e 0C 15 00 02 7f 0D 15 00 02 80 0E 15 00 02 81 0F 15 00 02 82 09 15 00 02 83 08 15 00 02 84 02 15 00 02 85 02 15 00 02 86 02 15 00 02 87 02 15 00 02 88 02 15 00 02 89 02 15 00 02 8A 02 39 00 04 FF 98 81 04 15 00 02 6E 2A 15 00 02 6F 37 15 00 02 3A 24 15 00 02 8D 19 15 00 02 87 BA 15 00 02 B2 D1 15 00 02 88 0B 15 00 02 38 01 15 00 02 39 00 15 00 02 B5 02 15 00 02 31 25 15 00 02 3B 98 39 00 04 FF 98 81 01 15 00 02 22 0A 15 00 02 31 0C 15 00 02 53 40 15 00 02 55 45 15 00 02 50 B7 15 00 02 51 B2 15 00 02 60 07 15 00 02 B7 03 15 00 02 A0 22 15 00 02 A1 3F 15 00 02 A2 4E 15 00 02 A3 17 15 00 02 A4 1A 15 00 02 A5 2D 15 00 02 A6 21 15 00 02 A7 22 15 00 02 A8 C4 15 00 02 A9 1B 15 00 02 AA 25 15 00 02 AB A7 15 00 02 AC 1A 15 00 02 AD 19 15 00 02 AE 4B 15 00 02 AF 1F 15 00 02 B0 2A 15 00 02 B1 59 15 00 02 B2 64 15 00 02 B3 3F 15 00 02 C0 22 15 00 02 C1 48 15 00 02 C2 59 15 00 02 C3 15 15 00 02 C4 15 15 00 02 C5 28 15 00 02 C6 1C 15 00 02 C7 1E 15 00 02 C8 C4 15 00 02 C9 1C 15 00 02 CA 2B 15 00 02 CB A3 15 00 02 CC 1F 15 00 02 CD 1E 15 00 02 CE 52 15 00 02 CF 24 15 00 02 D0 2A 15 00 02 D1 58 15 00 02 D2 68 15 00 02 D3 3F 39 00 04 FF 98 81 00 05 78 01 11 //Delay 120ms 05 14 01 29 //Delay 20ms ]; panel-exit-sequence = [ 39 00 04 FF 98 81 00 //page0 05 14 01 28 //Delay 20ms 05 78 01 10 //Delay 120ms ]; dis1_timings0: display-timings { native-mode = <&dsi_timing0>; dsi_timing0: timing0 { clock-frequency = <70000000>;//<80000000>; hactive = <800>;//<768>; vactive = <1280>; hsync-len = <20>; //20, 50,10 hback-porch = <20>; //50, 56,10 hfront-porch = <40>;//50, 30,180 vsync-len = <4>;//4 vback-porch = <20>;//4 vfront-porch = <20>;//8 hsync-active = <0>; vsync-active = <0>; de-active = <0>; pixelclk-active = <0>; }; }; 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>; }; }; }; }; //使能屏幕的触摸功能 &i2c0 { //clock-frequency = <400000>; pinctrl-names = "default"; status = "okay"; goodix_ts@14 { status = "okay"; compatible = "goodix,gt9xxx"; reg = <0x14>; interrupt-parent = <&gpio0>; interrupts = ; //goodix,pwr-gpio = <&pca9555 PCA_IO0_7 GPIO_ACTIVE_HIGH>; reset-gpios = <&pca9555 PCA_IO0_3 GPIO_ACTIVE_HIGH>; irq-gpios = <&gpio0 RK_PB6 IRQ_TYPE_LEVEL_LOW>; irq-flags = <2>; /* 1 rising, 2 falling */ touchscreen-size-x = <800>; touchscreen-size-y = <1280>; goodix,slide-wakeup = <0>; goodix,type-a-report = <0>; goodix,driver-send-cfg = <1>; goodix,resume-in-workqueue = <0>; goodix,int-sync = <1>; //goodix,swap-x2y = <0>; goodix,esd-protect = <1>; goodix,auto-update-cfg = <0>; goodix,auto-update = <0>; goodix,power-off-sleep = <0>; goodix,pen-suppress-finger = <0>; goodix,cfg-group2 = [ 62 20 03 00 05 0A 35 00 01 0A 28 0F 50 3C 03 05 00 00 00 00 00 00 06 18 1A 1E 14 90 30 AA 37 39 12 0C 00 00 00 1A 02 2D 00 00 00 00 00 00 00 00 07 00 00 28 4B 94 D5 02 07 00 00 04 9A 2A 00 8C 30 00 81 36 00 76 3E 00 6E 46 00 6E 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 00 00 00 00 00 00 00 19 18 17 16 15 14 11 10 0F 0E 0D 0C 09 08 07 06 05 04 01 00 00 00 00 00 00 00 00 00 00 00 14 13 12 11 10 0F 0E 0D 0C 0A 08 07 06 04 02 00 19 1B 1C 1E 1F 20 21 22 23 24 25 26 27 28 29 2A 00 00 00 00 00 00 00 00 00 00 D8 01]; }; }; 在配置 MIPI DSI的时候，如果出现异常现象，如黑屏，画面拉伸，显示有噪点 等，需要注意排查： 显示时序是否配置正确，尤其是 DCLK 的配置。 上下电时序是否正确，在文件 kernel/drivers/gpu/drm/panel/panel-simple.c 中的 panel_simple_prepare 和 panel_simple_unprepare 函数内，调用了设备 树中所配置的上下电时序和 gpio 口。 如果选择在 uboot 阶段开启开机 logo, 那么还需要排查 u-boot/drivers/video/drm/rockchip_panel.c 文件内 的 panel_simple_prepare 和 panel_simple_unprepare 函数。 搭示波器看一下上电时序是否正确，主要是确认 LCD 使能引脚、复位引脚和屏 幕上电指令间的时序是否正确。 调试手段 获取系统中正在使用的 Video Port（与所连接的显示控制器） 信息 root@rk3506-buildroot:/# cat /sys/kernel/debug/dri/0/summary VOP [ff600000.vop]: ACTIVE Connector: DSI-1 bus_format[100a]: RGB888_1X24 overlay_mode[0] output_mode[0]color-encoding[1] color-range[1] Display mode: 800x1280p60 dclk[70000 kHz] real_dclk[69475 kHz] aclk[294912 kHz] type[48] flag[a] H: 800 840 860 880 V: 1280 1300 1304 1324 win1-0: ACTIVE format: XR24 little-endian (0x34325258) SDR[0] color-encoding[0] color-range[0] csc: y2r[0] r2r[0] r2y[0] csc mode[0] zpos: 0 src: pos[0x0] rect[800x1280] dst: pos[0x0] rect[800x1280] buf[0]: addr: 0x1e000000 pitch: 3200 offset: 0 post: sdr2hdr[0] hdr2sdr[0] pre : sdr2hdr[0] post CSC: r2y[0] y2r[0] CSC mode[2] 一般如果遇到屏幕无法显示的问题，都需要先执行上面的命令去看一下连接状态 和分辨率是否正确。