各位大侠，小弟是第一次发帖，还请各位多多指教！最近在linux2.6下开发基于S3C2440的camera驱动，视频数据通过lcd显示，现在的问题是camera数据无法显示到lcd上面，可以确定lcd驱动是正常的；现贴出一些相关程序：
#define VIDEOMEMSIZE (2*320*240) // 1 MB ，lcd 一屏的数据字节数
unsigned int pVideoBuffer;  //写入lcdaddr的那个值
static unsigned char*videomemory; 
static u_long videomemorysize = VIDEOMEMSIZE;

int DEMO_init_module(void)
{
int result;
dev_t dev = 0;
dev = MKDEV(DEMO_MAJOR, DEMO_MINOR);
result = register_chrdev_region(dev, 1, "DEMO");
if (result cdev, &DEMO_fops);
DEMO_devices->cdev.owner = THIS_MODULE;
DEMO_devices->cdev.ops = &DEMO_fops;
result = cdev_add (&DEMO_devices->cdev, dev, 1);
       
if(result)
{
printk(KERN_NOTICE "Error %d adding DEMOn", result);
goto fail;
}
       
        gf_base_int = ioremap(0x4a000000,0x20);          
        gf_base_gpio_b= ioremap(0x56000010, 0x0c);
        gf_base_gpio_c = ioremap(0x56000020,0x0c);
        gf_base_gpio_d= ioremap(0x56000030, 0x0c);
        gf_base_gpio_e = ioremap(0x56000040,0x0c);
        gf_base_gpio_f= ioremap(0x56000050, 0x0c);
        gf_base_gpio_g = ioremap(0x56000060,0x0c);
        gf_base_gpio_j= ioremap(0x560000d0, 0x0c);
        gf_base_lcd_con1= ioremap(0x4d000000, 0x60);       
        gf_base_clk_power = ioremap(0x4c000000,0x20);         
        gf_base_camera = ioremap(0x4f000000,0xa4);   
        request_dma(1,"DEMO");
        videomemorysize=PAGE_ALIGN(videomemorysize+PAGE_SIZE);
videomemory=dma_alloc_writecombine(NULL,videomemorysize,&pVideoBuffer,GFP_KERNEL);
memset(videomemory, 10, videomemorysize); //这里可以使lcd全屏显示某一种颜色
} 

static void Lcd_Init(void)

{        
rLCDCON1=(7