1、修改文件TQIMX6_android-4.2.2\bootable\bootloader\uboot-imx\common\cmd_menu.c文件
在函数lcd_menu_shell中添加：
1 case ‘2‘: 2 do 3 { 4 printf("\r\n##### display select LVDS #####\r\n"); 5 printf("[1] 800*600 for LVDS->VGA\r\n"); 6 printf("[2] 1024*600 for LVDS->VGA\r\n"); 7 printf("[3] 1024*768 for LVDS->VGA \r\n"); 8 printf("[4] 1280*800 for LVDS->VGA \r\n"); 9 printf("[5] 1366*768 for LVDS \r\n"); 10 printf("[6] 1920*1080 for LVDS (2 lvds is needed,LVDS only) \r\n"); 11 printf("[q] quit \r\n"); 12 printf("Enter your selection: "); 13 c = getc(); 14 printf("%c\n", c); 15 if (c == ‘1‘)11 ……………………… 12 } 1 else if (c == ‘2‘) 2 { 3 sprintf(cmd_buf, "dev=ldb,LDB-LVDS,if=RGB666,bpp=32 ldb=dul0"); 4 break; 5 }
2、修改后烧入板子后效果：
1、修改文件TQIMX6_android-4.2.2\kernel_imx\drivers\video\mxc\ldb.c
在ldb_modedb[]中添加以下代码
static struct fb_videomode ldb_modedb[] = { { "LDB-LVDS", 60, 1024, 600, 19531, 140, 160, 20, 12, 20, 12, 0, FB_VMODE_NONINTERLACED,http://i.cnblogs.com/EditPosts.aspx?postid=3773705 FB_MODE_IS_DETAILED,}, {
fb_videomode每个参数的意思：
1 struct fb_videomode { 2 const char *name; //name 3 u32 refresh; //Frequency 4 u32 xres; 5 u32 yres; 6 u32 pixclock; //时钟频率 7 u32 left_margin; //HBPD( Horizontal sync Back porch (pixels)) 8 u32 right_margin; //HFPD(Horizontal sync Front porch (pixels)) 9 u32 upper_margin; //VBPD(Vertical sync Back porch (pixels)) 10 u32 lower_margin; //VFPD( vertical sync Front porch (pixels)) 11 u32 hsync_len; //HSPW(Horizontal sync pulse width (pixels)) 12 u32 vsync_len; //VSPW(Vertical Sync pulse width (pixels)) 13 u32 sync; 14 u32 vmode; 15 u32 flag; 16 };
这个参数在屏幕的规格书里都有
或者可以参考下面的设置：
--------------------------------------------------- 720x480p: Generic timing details for 720x480: HFP=76 HSW=40 HBP=100 HF=34KHz VFP=29 VSW=1 VBP=53 VF=60Hz ---------------------------------------------------- Widescreen 16:9 848x480p Generic timing details for 848x480: HFP=88 HSW=48 HBP=120 HF=34KHz VFP=28 VSW=1 VBP=54 VF=60Hz ---------------------------------------------------- Widescreen 16:9 856x480p Generic timing details for 856x480: HFP=87 HSW=48 HBP=121 HF=34KHz VFP=28 VSW=1 VBP=54 VF=60Hz ---------------------------------------------------- Screen 4:3 1080x480p Generic timing details for 1080x480: HFP=108 HSW=48 HBP=164 HF=34KHz VFP=29 VSW=1 VBP=53 VF=60Hz ---------------------------------------------------- Screen 4:3 1440x480p Generic timing details for 1440x480: HFP=144 HSW=80 HBP=208 HF=34KHz VFP=29 VSW=1 VBP=53 VF=60Hz ----------------------------------------------------- Screen 4:3 1800x480p Generic timing details for 1800x480: HFP=154 HSW=96 HBP=246 HF=34KHz VFP=32 VSW=1 VBP=50 VF=60Hz ----------------------------------------------------- Screen 4:3 1800x540p Generic timing details for 1800x540: HFP=148 HSW=96 HBP=244 HF=34KHz VFP=7 VSW=1 VBP=15 VF=60Hz ----------------------------------------------------- Screen 4:3 1920x540p Generic timing details for 1920x540: HFP=161 HSW=104 HBP=255 HF=34KHz VFP=7 VSW=1 VBP=15 VF=60Hz ----------------------------------------------------- Screen 4:3 960x540p Generic timing details for 960x540: HFP=98 HSW=48 HBP=142 HF=34KHz VFP=7 VSW=1 VBP=15 VF=60Hz -------------------------------------------------------------------------------------- Powerstrip dongle 540P/1080i custom timings: ------------------------------------------------------------------------ Screen 4:3 640x480p HDTV Generic timing details for 640x480: HFP=143 HSW=48 HBP=169 HF=34KHz VFP=28 VSW=1 VBP=54 VF=60Hz ------------------------------------------------------------------- Screen 4:3 720x480p HDTV Generic timing details for 720x480: HFP=72 HSW=48 HBP=88 HF=34KHz VFP=29 VSW=1 VBP=53 VF=60Hz ------------------------------------------------------------------- Screen 4:3 856x480p HDTV Generic timing details for 856x480: HFP=88 HSW=48 HBP=120 HF=34KHz VFP=28 VSW=1 VBP=54 VF=60Hz -------------------------------------------------------------------- Screen 4:3 1776x1000i HDTV Generic timing details for 1776x1000: HFP=136 HSW=48 HBP=240 kHz=34 VFP=42 VSW=5 VBP=78 Hz=30 interlace -------------------------------------------------------------------- Screen 16:9 1920x1080i HDTV Generic timing details for 1920x1080: HFP=169 HSW=64 HBP=295 HF=34KHz VFP=20 VSW=5 VBP=20 VF=30Hz interlace ------------------------------------------------------------------------------------ Screen 4:3 800x600i Generic timing details for 800x600: HFP=279 HSW=56 HBP=329 HF=34KHz VFP=250 VSW=1 VBP=274 VF =30Hz interlace ------------------------------------------------------- Screen 4:3 1024x768i Generic timing details for 1024x768: HFP=164 HSW=56 HBP=220 HF=34KHz VFP=160 VSW=1 VBP=196 VF=30Hz interlace -------------------------------------------------------- Screen 4:3 1152x864i Generic timing details for 1152x864: HFP=190 HSW=112 HBP=218 HF=34KHz VFP=112 VSW=1 VBP=148 VF=30Hz interlace ----------------------------------------------------------- Screen 4:3 1280x720i Generic timing details for 1280x720: HFP=125 HSW=120 HBP=139 HF=34KHz VFP=180 VSW=1 VBP=224 VF=30Hz interlace ----------------------------------------------------------- Screen 4:3 1280x768i Generic timing details for 1280x768: HFP=138 HSW=96 HBP=166 HF=34KHz VFP=156 VSW=1 VBP=200 VF=30Hz interlace -------------------------------------------------------------- Screen 4:3 1280x960i Generic timing details for 1280x960: HFP=128 HSW=96 HBP=160 HF=34KHz VFP=44 VSW=1 VBP=120 VF=30Hz interlace ---------------------------------------------------------------- Screen 4:3 1280x1024i Generic timing details for 1280x1024: HFP=127 HSW=96 HBP=161 HF=34KHz VFP=43 VSW=3 VBP=55 VF=30Hz interlace ---------------------------------------------------------------- Screen 4:3 1440x960i Generic timing details for 1440x960: HFP=140 HSW=104 HBP=180 HF=34KHz VFP=60 VSW=1 VBP=104 VF=30Hz interlace ------------------------------------------------------------------ Screen 4:3 1600x900i Generic timing details for 1600x900: HFP=159 HSW=80 HBP=249 HF=34KHz VFP=89 VSW=3 VBP=133 VF=30Hz interlace ----------------------------------------------------------------- Screen 4:3 1776x1000i Generic timing details for 1776x1000: HFP=166 HSW=88 HBP=274 HF=34KHz VFP=44 VSW=5 VBP=76 VF=30Hz interlace ------------------------------------------------------------------ Screen 4:3 1920x1080i Generic timing details for 1920x1080: HFP=180 HSW=144 HBP=244 HF=34KHz VFP=24 VSW=2 VBP=20 VF=30Hz interlace *************************************** 480p timings *************************************** Screen 4:3 640x480p Generic timing details for 640x480: HFP=55 HSW=96 HBP=57 HF=32KHz VFP=11 VSW=5 VBP=29 VF=60Hz ------------------------------------------------------- Screen 4:3 720x480p Generic timing details for 720x480: HFP=67 HSW=96 HBP=85 HF=32KHz VFP=21 VSW=5 VBP=19 VF=60Hz -------------------------------------------------------- Screen 4:3 1440x480p Generic timing details for 1440x480: HFP=118 HSW=144 HBP=218 HF=32KHz VFP=13 VSW=5 VBP=27 VF=60Hz --------------------------------------------------------
重新编译内核烧入板子中，就可以正常显示；
修改LVDS支持1024*600分辨率,布布扣,bubuko.com
原文：http://www.cnblogs.com/wang-le/p/3773705.html