修改LVDS支持1024*600分辨率

• 一、在boot中增加LVDS设置分辨率1024*600选项

　　　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：

 case '':
         do
         {
             printf("\r\n##### display select LVDS #####\r\n");
             printf("[1] 800*600 for LVDS->VGA\r\n");
             printf("[2] 1024*600 for LVDS->VGA\r\n");
             printf("[3] 1024*768 for LVDS->VGA \r\n");
             printf("[4] 1280*800 for LVDS->VGA \r\n");
             printf("[5] 1366*768 for LVDS \r\n");
             printf("[6] 1920*1080 for LVDS (2 lvds is needed,LVDS only) \r\n");
             printf("[q] quit \r\n");
             printf("Enter your selection: ");
             c = getc();
             printf("%c\n", c);
             if (c == '')     ………………………
     }

     else if (c == '')
             {
                 sprintf(cmd_buf, "dev=ldb,LDB-LVDS,if=RGB666,bpp=32 ldb=dul0");
                 break;
             }

　　　　2、修改后烧入板子后效果：　　

　　　　

• 二、修改内核驱动支持1024*600

　　　　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", , , , ,
     , ,
     , ,
     , ,
     ,
     FB_VMODE_NONINTERLACED,http://i.cnblogs.com/EditPosts.aspx?postid=3773705
     FB_MODE_IS_DETAILED,},
    {

　　fb_videomode每个参数的意思：

 struct fb_videomode {
     const char *name;    //name
     u32 refresh;        //Frequency
     u32 xres;　　　　　　
     u32 yres;　　　　　　
     u32 pixclock;　　　　//时钟频率
     u32 left_margin;　　//HBPD( Horizontal sync Back porch (pixels))
     u32 right_margin;　　//HFPD(Horizontal sync Front porch (pixels))
     u32 upper_margin; 　　//VBPD(Vertical sync Back porch (pixels))
     u32 lower_margin;　　//VFPD( vertical sync Front porch (pixels))
     u32 hsync_len;　　　　//HSPW(Horizontal sync pulse width (pixels))
     u32 vsync_len;　　　　//VSPW(Vertical Sync pulse width (pixels))
     u32 sync;
     u32 vmode;
     u32 flag;
 };

　　　　

　　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= HSW= HBP= HF=34KHz VFP= VSW= VBP= VF=60Hz
----------------------------------------------------
Widescreen :
848x480p

Generic timing details for 848x480:
HFP= HSW= HBP= HF=34KHz VFP= VSW= VBP= VF=60Hz
----------------------------------------------------
Widescreen :
856x480p

Generic timing details for 856x480:
HFP= HSW= HBP= HF=34KHz VFP= VSW= VBP= VF=60Hz
----------------------------------------------------
Screen :
1080x480p

Generic timing details for 1080x480:
HFP= HSW= HBP= HF=34KHz VFP= VSW= VBP= VF=60Hz
----------------------------------------------------
Screen :
1440x480p

Generic timing details for 1440x480:
HFP= HSW= HBP= HF=34KHz VFP= VSW= VBP= VF=60Hz
-----------------------------------------------------
Screen :
1800x480p

Generic timing details for 1800x480:
HFP= HSW= HBP= HF=34KHz VFP= VSW= VBP= VF=60Hz
-----------------------------------------------------
Screen :
1800x540p

Generic timing details for 1800x540:
HFP= HSW= HBP= HF=34KHz VFP= VSW= VBP= VF=60Hz
-----------------------------------------------------
Screen :
1920x540p

Generic timing details for 1920x540:
HFP= HSW= HBP= HF=34KHz VFP= VSW= VBP= VF=60Hz
-----------------------------------------------------
Screen :
960x540p

Generic timing details for 960x540:
HFP= HSW= HBP= HF=34KHz VFP= VSW= VBP= VF=60Hz
--------------------------------------------------------------------------------------
Powerstrip dongle 540P/1080i custom timings:
------------------------------------------------------------------------
Screen :
640x480p HDTV

Generic timing details for 640x480:
HFP= HSW= HBP= HF=34KHz VFP= VSW= VBP= VF=60Hz
-------------------------------------------------------------------
Screen :
720x480p HDTV

Generic timing details for 720x480:
HFP= HSW= HBP= HF=34KHz VFP= VSW= VBP= VF=60Hz
-------------------------------------------------------------------
Screen :
856x480p HDTV

Generic timing details for 856x480:
HFP= HSW= HBP= HF=34KHz VFP= VSW= VBP= VF=60Hz
--------------------------------------------------------------------
Screen :
1776x1000i HDTV

Generic timing details for 1776x1000:
HFP= HSW= HBP= kHz= VFP= VSW= VBP= Hz=
interlace
--------------------------------------------------------------------
Screen :
1920x1080i HDTV

Generic timing details for 1920x1080:
HFP= HSW= HBP= HF=34KHz VFP= VSW= VBP= VF=30Hz
interlace
------------------------------------------------------------------------------------
Screen :
800x600i

Generic timing details for 800x600:
HFP= HSW= HBP= HF=34KHz VFP= VSW= VBP= VF =30Hz
interlace
-------------------------------------------------------
Screen :
1024x768i

Generic timing details for 1024x768:
HFP= HSW= HBP= HF=34KHz VFP= VSW= VBP= VF=30Hz
interlace
--------------------------------------------------------
Screen :
1152x864i

Generic timing details for 1152x864:
HFP= HSW= HBP= HF=34KHz VFP= VSW= VBP= VF=30Hz
interlace
-----------------------------------------------------------
Screen :
1280x720i

Generic timing details for 1280x720:
HFP= HSW= HBP= HF=34KHz VFP= VSW= VBP= VF=30Hz
interlace
-----------------------------------------------------------
Screen :
1280x768i

Generic timing details for 1280x768:
HFP= HSW= HBP= HF=34KHz VFP= VSW= VBP= VF=30Hz
interlace
--------------------------------------------------------------
Screen :
1280x960i

Generic timing details for 1280x960:
HFP= HSW= HBP= HF=34KHz VFP= VSW= VBP= VF=30Hz
interlace
----------------------------------------------------------------
Screen :
1280x1024i

Generic timing details for 1280x1024:
HFP= HSW= HBP= HF=34KHz VFP= VSW= VBP= VF=30Hz
interlace
----------------------------------------------------------------
Screen :
1440x960i

Generic timing details for 1440x960:
HFP= HSW= HBP= HF=34KHz VFP= VSW= VBP= VF=30Hz
interlace
------------------------------------------------------------------
Screen :
1600x900i

Generic timing details for 1600x900:
HFP= HSW= HBP= HF=34KHz VFP= VSW= VBP= VF=30Hz
interlace
-----------------------------------------------------------------
Screen :
1776x1000i

Generic timing details for 1776x1000:
HFP= HSW= HBP= HF=34KHz VFP= VSW= VBP= VF=30Hz
interlace
------------------------------------------------------------------
Screen :
1920x1080i

Generic timing details for 1920x1080:
HFP= HSW= HBP= HF=34KHz VFP= VSW= VBP= VF=30Hz
interlace
***************************************
480p timings
***************************************
Screen :
640x480p

Generic timing details for 640x480:
HFP= HSW= HBP= HF=32KHz VFP= VSW= VBP= VF=60Hz
-------------------------------------------------------
Screen :
720x480p

Generic timing details for 720x480:
HFP= HSW= HBP= HF=32KHz VFP= VSW= VBP= VF=60Hz
--------------------------------------------------------
Screen :
1440x480p

Generic timing details for 1440x480:
HFP= HSW= HBP= HF=32KHz VFP= VSW= VBP= VF=60Hz
--------------------------------------------------------

重新编译内核烧入板子中，就可以正常显示；