使用Linux3.2.81核心

4.3寸LCD

1. 修改arch/arm/mach-s3c2440/mach-smdk2440.c

   staticstruct s3c2410fb_display smdk2440_lcd_cfg __initdata = {

   .lcdcon5=S3C2410_LCDCON5_FRM565 |

   S3C2410_LCDCON5_INVVLINE |

   S3C2410_LCDCON5_INVVFRAME |

   S3C2410_LCDCON5_PWREN |

   S3C2410_LCDCON5_HWSWP,

   .type =S3C2410_LCDCON1_TFT,

   //根據

   LCD資料手冊

   .width= 480,

   .height= 272,

   .pixclock= 101111,

   .xres= 480,

   .yres= 272,

   .bpp= 16,

   .left_margin= 2,/* for HFPD*/

   .right_margin= 2,/* for HBPD*/

   .hsync_len= 42,/*for HSPW*/

   .upper_margin= 2,/* for VFPD*/

   .lower_margin= 2,/* for VBPD*/

   .vsync_len= 10,/*for VSPW*/

   };

   pixclock的計算：
   DOTCLK = fframe × (X + HBP + HFP+HSPW) × (Y +VBP + VFP+VSPW)  //fframe

   是螢幕重新整理頻率（本開發板60HZ）

   staticstruct s3c2410fb_mach_info smdk2440_fb_info __initdata = {

   .displays=&smdk2440_lcd_cfg,

   .num_displays=1,

   .default_display = 0,

   //#if 0

   /* currently setup bydownloader */

   .gpccon= 0xaaaaaaaa,

   .gpccon_mask= 0xffffffff,

   .gpcup= 0xffffffff,

   .gpcup_mask= 0xffffffff,

   .gpdcon= 0xaaaaaaaa,

   .gpdcon_mask= 0xffffffff,

   .gpdup= 0xffffffff,

   .gpdup_mask= 0xffffffff,

   //#endif

   //.lpcsel= ((0xCE6) & ~7) | 1<<4,//這是三星的LCD才會使用到的

   };

   staticvoid __init smdk2440_machine_init(void)

   {

   s3c24xx_fb_set_platdata(&smdk2440_fb_info);

   s3c_i2c0_set_platdata(NULL);

   //新增下面三行

   writel((readl(S3C2410_GPBCON)& ~(3)) | 1, S3C2410_GPBCON);

   writel((readl(S3C2410_GPBDAT)| 1), S3C2410_GPBDAT);//背光控制

   writel((readl(S3C2410_GPGCON)| (3<<8)), S3C2410_GPGCON);//電源控制

   platform_add_devices(smdk2440_devices,ARRAY_SIZE(smdk2440_devices));

   smdk_machine_init();

   }

   並且新增#include <asm/io.h>標頭檔案

1. 執行make menuconfig

   Device Driversà

   Graphicssupportà

   <*>Support for frame buffer devicesà

   [*]Enable firmware EDID

   -*-Enable Video Mode Handling Helpers

   <*> S3C24X0 LCD framebuffer support

   Consoledisplay driver supportà

   <*>Framebuffer Console support

   [*]Select compiled-in fonts

   [*]VGA 8x8 font

   [*]VGA 8x16 font

   [*]Bootup logoà

   [*]Standard 224-color Linux logo

3、編譯重新下載

注意：螢幕沒顯示是因為沒有初始化電源控制腳和背光控制腳。