移植详解(TFT液晶屏驱动移植)

1、打开 arch/arm/mach-s3c2440/mach-smdk2440.c，先删除之前的 LCD 设备平台代码
/* LCD driver info */
static struct s3c2410fb_display smdk2440_lcd_cfg __initdata = {
      ……
}
static struct s3c2410fb_mach_info smdk2440_fb_info __initdata = {
      ……
}

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2、再把已经移植好的代码加入，如下：
/* LCD driver info */
//2440 3.5”LCD的配置和参数设置
#if defined(CONFIG_FB_S3C2410_W320240)
#define LCD_WIDTH 320
#define LCD_HEIGHT 240
#define LCD_PIXCLOCK 100000
#define LCD_RIGHT_MARGIN 23
#define LCD_LEFT_MARGIN 18
#define LCD_HSYNC_LEN 43
#define LCD_UPPER_MARGIN 6
#define LCD_LOWER_MARGIN 4
#define LCD_VSYNC_LEN 14

//NEC 3.5”LCD的配置和参数设置
#elif defined(CONFIG_FB_S3C2410_N240320)
#define LCD_WIDTH 240
#define LCD_HEIGHT 320
#define LCD_PIXCLOCK 100000
#define LCD_RIGHT_MARGIN 36
#define LCD_LEFT_MARGIN 19
#define LCD_HSYNC_LEN 5
#define LCD_UPPER_MARGIN 1
#define LCD_LOWER_MARGIN 5
#define LCD_VSYNC_LEN 1 

//夏普 8”LCD的配置和参数设置
#elif defined(CONFIG_FB_S3C2410_TFT640480)
#define LCD_WIDTH 640
#define LCD_HEIGHT 480
#define LCD_PIXCLOCK 80000
#define LCD_RIGHT_MARGIN 67 
#define LCD_LEFT_MARGIN 40
#define LCD_HSYNC_LEN 31
#define LCD_UPPER_MARGIN 25
#define LCD_LOWER_MARGIN 5
#define LCD_VSYNC_LEN 1

//统宝 3.5”LCD的配置和参数设置
#elif defined(CONFIG_FB_S3C2410_T240320)
#define LCD_WIDTH 240
#define LCD_HEIGHT 320
#define LCD_PIXCLOCK 146250//170000
#define LCD_RIGHT_MARGIN 25
#define LCD_LEFT_MARGIN 0
#define LCD_HSYNC_LEN 4
#define LCD_UPPER_MARGIN 1
#define LCD_LOWER_MARGIN 4
#define LCD_VSYNC_LEN 1

//群创 7”LCD的配置和参数设置
#elif defined(CONFIG_FB_S3C2410_TFT800480)
#define LCD_WIDTH 800
#define LCD_HEIGHT 480
#define LCD_PIXCLOCK 11463 //40000
#define LCD_RIGHT_MARGIN 67
#define LCD_LEFT_MARGIN 40
#define LCD_HSYNC_LEN 31
#define LCD_UPPER_MARGIN 25
#define LCD_LOWER_MARGIN 5
#define LCD_VSYNC_LEN 1

//LCD2VGA(分辨率为 1024x768)模块的配置和参数设置
#elif defined(CONFIG_FB_S3C2410_VGA1024768)
#define LCD_WIDTH 1024
#define LCD_HEIGHT 768
#define LCD_PIXCLOCK 80000
#define LCD_RIGHT_MARGIN 15
#define LCD_LEFT_MARGIN 199
#define LCD_HSYNC_LEN 15
#define LCD_UPPER_MARGIN 1
#define LCD_LOWER_MARGIN 1
#define LCD_VSYNC_LEN 1
#define LCD_CON5 (S3C2410_LCDCON5_FRM565 | S3C2410_LCDCON5_HWSWP)
#endif

#if defined (LCD_WIDTH)
static struct s3c2410fb_display smdk2440_lcd_cfg __initdata = {
#if !defined (LCD_CON5)
        .lcdcon5        = S3C2410_LCDCON5_FRM565 |
                          S3C2410_LCDCON5_INVVLINE |
                          S3C2410_LCDCON5_INVVFRAME |
                          S3C2410_LCDCON5_PWREN |
                          S3C2410_LCDCON5_HWSWP,
#else
        .lcdcon5        = LCD_CON5,
#endif
        .type          = S3C2410_LCDCON1_TFT,

        .width          = LCD_WIDTH,
        .height        = LCD_HEIGHT,

        .pixclock      = LCD_PIXCLOCK,
        .xres          = LCD_WIDTH,
        .yres          = LCD_HEIGHT,
        .bpp            = 16,
        .left_margin    = LCD_LEFT_MARGIN + 1,
        .right_margin  = LCD_RIGHT_MARGIN + 1,
        .hsync_len      = LCD_HSYNC_LEN + 1,
        .upper_margin  = LCD_UPPER_MARGIN + 1,
        .lower_margin  = LCD_LOWER_MARGIN + 1,
        .vsync_len      = LCD_VSYNC_LEN + 1,
};

static struct s3c2410fb_mach_info smdk2440_fb_info __initdata = {
        .displays      = &smdk2440_lcd_cfg,
        .num_displays  = 1,
        .default_display = 0,

        .gpccon =      0xaa955699,
        .gpccon_mask =  0xffc003cc,
        .gpcup =        0x0000ffff,
        .gpcup_mask =  0xffffffff,

        .gpdcon =      0xaa95aaa1,
        .gpdcon_mask =  0xffc0fff0,
        .gpdup =        0x0000faff,
        .gpdup_mask =  0xffffffff,

        .lpcsel        = 0xf82,
};
#endif


注：我只试过第一个配置，其它配置本人未测试过。



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3、  打开 drivers/video/Kconfig，加入以下配置信息：


config FB_S3C2410
tristate "S3C2410 LCD framebuffer support"
depends on FB && ARCH_S3C2410
select FB_CFB_FILLRECT
select FB_CFB_COPYAREA
select FB_CFB_IMAGEBLIT
select BACKLIGHT_SMDK2440
---help---
……
choice
prompt "LCD select"
depends on FB_S3C2410
help
  3C24x0 LCD size select
config FB_S3C2410_W320240
boolean "3.5 inch 320X240 WANXIN LCD"
depends on FB_S3C2410
help
  3.5 inch 240X320 WANXIN LCD
 
config FB_S3C2410_T240320
boolean "3.5 inch 240X320 Toppoly LCD"
depends on FB_S3C2410
help
  3.5 inch 240X320 Toppoly LCD

config FB_S3C2410_N240320
boolean "3.5 inch 240X320 NEC LCD"
depends on FB_S3C2410
help
  3.5 inch 240x320 NEC LCD

config FB_S3C2410_TFT640480
boolean "8 inch 640X480 L80 LCD"
depends on FB_S3C2410
help
  8 inch 640X480 LCD

config FB_S3C2410_TFT800480
boolean "7 inch 800x480 TFT LCD"
depends on FB_S3C2410
help
  7 inch 800x480 TFT LCD

config FB_S3C2410_VGA1024768
boolean "VGA 1024x768"
depends on FB_S3C2410
help
  VGA 1024x768
endchoice 
config BACKLIGHT_SMDK2440
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4、配置内核
Device Drivers  --->
Graphics support  --->
<*> Support for frame buffer devices  --->
   

•   Enable firmware EDID
     
•   Enable Video Mode Handling Helpers
      <*>  S3C2410 LCD framebuffer support
          LCD select (3.5 inch 320X240 WANXIN LCD)  --->