MIPI dsi 的dts的Timing问题

Chip Platform Rockchip
1

本帖最后由 tndcool86 于 2018-6-27 13:20 编辑

rk3399-firefly-mipi.dts文件中，Timing的参
，请问 clock-frequency = <80000000>;是怎么得出来的？

disp_timings: display-timings {
                                          native-mode = <&timing0>;
                                          timing0: timing0 {
                                                       clock-frequency = <80000000>;
                                                       hactive = <768>;
                                                       vactive = <1024>;
                                                       hsync-len = <20>;   //20, 50
                                                       hback-porch = <130>; //50, 56
                                                       hfront-porch = <150>;//50, 30
                                                       vsync-len = <40>;
                                                       vback-porch = <130>;
                                                       vfront-porch = <136>;
                                                       hsync-active = <0>;
                                                       vsync-active = <0>;
                                                       de-active = <0>;
                                                       pixelclk-active = <0>;
                                                   };
                                      };

谢谢

2

屏幕对应的技术手册里面都是有的

screen-type = <SCREEN_MIPI>; //单MIPI SCREEN_MIPI; 双mipi SCREEN_DUAL_MIPI
lvds-format = <LVDS_8BIT_2>; //和lvds相关的
out-face = <OUT_P666>; //屏幕接线格式 配置颜色，可为OUT_P888（24位）、OUT_P666（18位）或者OUT_P565（16位）
clock-frequency = <67000000>; //dclk频率 数据手册里面有相关数据
hactive = <768>; //水平有效像素
vactive = <1024>; //垂直有效像素
hback-porch = <56>; //水平同步信号 后肩
hfront-porch = <60>; //水平同步信号 前肩
vback-porch = <30>; //垂直同步信号 后肩
vfront-porch = <36>; //垂直同步信号 前肩
hsync-len = <64>; //水平垂直信号
vsync-len = <14>; //垂直同步信号

	/*
	hactive = <1024>;
	vactive = <768>;
	hback-porch = <56>;
	hfront-porch = <60>;
	vback-porch = <30>;
	vfront-porch = <36>;
	hsync-len = <64>;
	vsync-len = <14>;
	*/
	hsync-active = <0>;         //极性控制 置1 反转特性
	vsync-active = <0>;
	de-active = <0>;            //DEN 极性控制
	pixelclk-active = <0>;      //dclk 极性控制
	swap-rb = <0>;              // 设1 反转颜色 red 和blue
	swap-rg = <0>;
	swap-gb = <0>;