TFT液晶屏驱动移植

来源：互联网发布：苹果系统修改软件编辑：程序博客网时间：2024/04/28 02:35

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_DEBUG

bool "S3C2410 lcd debug messages"

depends on FB_S3C2410

help

Turn on debugging messages. Note that you can set/unset at run time

through sysfs

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

-----------------------------------------------------------------------

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) --->