最近调试一个55寸的LVDS屏，按照LCD屏的手册，找不到对应的参数：如下是LCD屏手册截图，没有 hback-porch；hfront-porch；vback-porch；vfront-porch；hsync-len；vsync-len这些参数。
在网上看了很多**，有一个讲只要满足如下公式就可以：
Hblank = hback-porch + hfront-porch + hsync-len;
Vblank = vback-porch + vfront-porch + vsync-len;
按照公式配置修改arch/arm/boot/dts/imx6qdl-sabresd.dtsi文件如下：
- mxcfb1: fb[url=home.php?mod=space&uid=2514928]@0[/url] {
- compatible = "fsl,mxc_sdc_fb";
- disp_dev = "ldb";
- interface_pix_fmt = "RGB24";
- mode_str ="LDB-XGA";
- default_bpp = <8>;
- int_clk = <0>;
- late_init = <0>;
- status = "disabled";
- };
- &ldb {
- status = "okay";
- split-mode = <1>;
- lvds-channel@0 {
- fsl,data-mapping = "jeida";
- fsl,data-width = <24>;
- status = "okay";
- display-timings {
- native-mode = <&timing0>;
- timing0: hsd100pxn1 {
- clock-frequency = <74250000>;
- hactive = <1920>;
- vactive = <1080>;
- hback-porch = <60>;
- hfront-porch = <20>;
- vback-porch = <20>;
- vfront-porch = <10>;
- hsync-len = <60>;
- vsync-len = <15>;
- };
- };
- };
- lvds-channel[url=home.php?mod=space&uid=2514798]@1[/url] {
- fsl,data-mapping = "jeida";
- fsl,data-width = <24>;
- status = "okay";
- display-timings {
- native-mode = <&timing1>;
- timing1: hsd100pxn1 {
- clock-frequency = <74250000>;
- hactive = <1920>;
- vactive = <1080>;
- hback-porch = <60>;
- hfront-porch = <20>;
- vback-porch = <20>;
- vfront-porch = <10>;
- hsync-len = <60>;
- vsync-len = <15>;
- };
- };
- };
- };
请问屏参应该如何获取？
| 
楼主
