问题描述

使用firefly-rk3288的板子，连接TV080WUM-NL0（京东方8寸mipi屏，我有规格书，可联系我索要），连接好VCC、GND、Data0-3，CLK，PWM，不知怎么连接背光相关的，现在开机有显示，无背光，请大家帮忙，感谢！！！

屏幕管脚图

图中标红的是我没有连接的，不知道连接到哪，主板上没有这些。

主板管脚图

屏幕参数dtsi代码

/** Copyright (C) 2014 ROCKCHIP, Inc.* arch/arm/boot/dts/lcd-tv080wum-mipi.dtsi* author: libing@rock-chips.com* create date: 2014-04-15* lcd model: tv080wum-nl0* resolution: 1920 X 1200* mipi channel: single*// {/* about mipi */disp_mipi_init: mipi_dsi_init{compatible = "rockchip,mipi_dsi_init";rockchip,screen_init = <0>;rockchip,dsi_lane      = <4>;rockchip,dsi_hs_clk        = <1000>;rockchip,mipi_dsi_num   = <1>;};disp_mipi_power_ctr: mipi_power_ctr {compatible = "rockchip,mipi_power_ctr";/*mipi_lcd_rst:mipi_lcd_rst{compatible = "rockchip,lcd_rst";rockchip,gpios = <&gpio2 GPIO_B7 GPIO_ACTIVE_LOW>;rockchip,delay = <100>;};mipi_lcd_en:mipi_lcd_en {compatible = "rockchip,lcd_en";rockchip,gpios = <&gpio0 GPIO_C1 GPIO_ACTIVE_HIGH>;rockchip,delay = <100>;};*/};disp_mipi_init_cmds: screen-on-cmds {compatible = "rockchip,screen-on-cmds";/*rockchip,cmd_debug = <1>;rockchip,on-cmds1 {compatible = "rockchip,on-cmds";rockchip,cmd_type = <HSDT>;rockchip,dsi_id = <2>;rockchip,cmd = <0xb0 0x02>;rockchip,cmd_delay = <0>;};*/};disp_timings: display-timings {native-mode = <&timing0>;compatible = "rockchip,display-timings";timing0: timing0 {screen-type = <SCREEN_MIPI>;lvds-format = <LVDS_8BIT_2>;out-face    = <OUT_P888>;clock-frequency = <120000000>;hactive = <1920>;vactive = <1200>;hback-porch = <80>;hfront-porch = <81>;vback-porch = <21>;vfront-porch = <21>;hsync-len = <10>;vsync-len = <3>;hsync-active = <0>;vsync-active = <0>;de-active = <0>;pixelclk-active = <0>;swap-rb = <0>;swap-rg = <0>;swap-gb = <0>;cabc-lut = </*gamma = 2.2*/>;cabc-gamma-base = </*gamma = 2.2*/>;};
timing1: timing1 {screen-type = <SCREEN_RGB>;out-face    = <OUT_P888>;color-mode = <COLOR_YCBCR>;clock-frequency = <74250000>;hactive = <1280>;vactive = <720>;hback-porch = <220>;hfront-porch = <110>;vback-porch = <20>;vfront-porch = <5>;hsync-len = <40>;vsync-len = <5>;hsync-active = <1>;vsync-active = <1>;de-active = <0>;pixelclk-active = <0>;swap-rb = <0>;swap-rg = <0>;swap-gb = <0>;};
timing2: timing2 {screen-type = <SCREEN_RGB>;out-face    = <OUT_P888>;color-mode = <COLOR_YCBCR>;clock-frequency = <148500000>;hactive = <1920>;vactive = <1080>;hback-porch = <148>;hfront-porch = <88>;vback-porch = <36>;vfront-porch = <4>;hsync-len = <44>;vsync-len = <5>;hsync-active = <1>;vsync-active = <1>;de-active = <0>;pixelclk-active = <0>;swap-rb = <0>;swap-rg = <0>;swap-gb = <0>;};timing3: timing3 {screen-type = <SCREEN_RGB>;out-face    = <OUT_P888>;color-mode = <COLOR_YCBCR>;clock-frequency = <297000000>;hactive = <3840>;vactive = <2160>;hback-porch = <296>;hfront-porch = <176>;vback-porch = <72>;vfront-porch = <8>;hsync-len = <88>;vsync-len = <10>;hsync-active = <1>;vsync-active = <1>;de-active = <0>;pixelclk-active = <0>;swap-rb = <0>;swap-rg = <0>;swap-gb = <0>;};};
};

求助

1 两个LED_vout和LB1，LB2，LB3，是否要通过专门的驱动电路来供电？？？怎么搞？？？
2 主板的pwm（gpio7_A1_D）接到了屏幕的LED_PWMIN，对吗？？屏幕的LED_PWMOUT又是干嘛的？？

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firefly-rk3288点mipi屏TV080WUM-NL0有显示无背光

firefly-rk3288 点屏 mipi 型号 TV080WUM-NL0 有显示无背光

问题描述

屏幕管脚图

主板管脚图

屏幕参数dtsi代码

求助

firefly-rk3288点mipi屏TV080WUM-NL0有显示无背光相关推荐

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firefly-rk3288点mipi屏TV080WUM-NL0有显示无背光

firefly-rk3288 点屏 mipi 型号 TV080WUM-NL0 有显示 无背光

问题描述

屏幕管脚图

主板管脚图

屏幕参数dtsi代码

求助

firefly-rk3288点mipi屏TV080WUM-NL0有显示无背光相关推荐

最新文章

热门文章

firefly-rk3288 点屏 mipi 型号 TV080WUM-NL0 有显示无背光