S3c6410_FB0和FB1

测试了一下S3C6410 LCD控制器提供的Overlay功能，写了一个简单的test，主要用于实现FB0和FB1之间的Overlay操作。

内核选项的Windows至少要为2。

具体支持如下操作：

1 使能OSD

2 关闭OSD

3 增加OSD的Alpha值

4 减少OSD的Alpha值

5 手动设置Alpha值（0-15）

6 上移OSD层

7 下移OSD层

8 左移OSD层

9 右移OSD层

10 设置OSD层

其中设置OSD层最重要，可以重新设置窗口的大小和起始位置，主要设置完后需要重新填充窗口数据，旧的数据将错乱。

///////////////////////////////////////////////////////////////

s3cfb.h

///////////////////////////////////////////////////////////////

#include

#include

typedef struct {

int bpp;

int left_x;

int top_y;

int width;

int height;

} s3c_win_info_t;

typedef struct{

__u32 phy_start_addr;

__u32 xres;

__u32 yres;

__u32 xres_virtual;

__u32 yres_virtual;

__u32 xoffset;

__u32 yoffset;

__u32 lcd_offset_x;

__u32 lcd_offset_y;

} s3c_fb_next_info_t;

#define FBIO_WAITFORVSYNC _IOW ('F', 32, unsigned int)

#define S3C_FB_OSD_START _IO ('F', 201)

#define S3C_FB_OSD_STOP _IO('F', 202)

#define S3C_FB_OSD_SET_INFO _IOW ('F', 209, s3c_win_info_t)

#define S3C_FB_CHANGE_REQ _IOW ('F', 308, int)

#define S3C_FB_GET_CURR_FB_INFO _IOR ('F', 321, s3c_fb_next_info_t)

#define S3C_FB_OSD_ALPHA_UP _IO ('F', 203)

#define S3C_FB_OSD_ALPHA_DOWN _IO ('F', 204)

#define S3C_FB_OSD_MOVE_LEFT _IO ('F', 205)

#define S3C_FB_OSD_MOVE_RIGHT _IO ('F', 206)

#define S3C_FB_OSD_MOVE_UP _IO ('F', 207)

#define S3C_FB_OSD_MOVE_DOWN _IO ('F', 208)

#define S3C_FB_OSD_ALPHA_SET _IOW ('F', 210, unsigned int)

#define S3C_FB_OSD_ALPHA0_SET _IOW ('F', 211, unsigned int)

#define S3C_FB_OSD_ALPHA_MODE _IOW ('F', 212, unsigned int)

////////////////////////////////////////////////////////////////

osd.c

////////////////////////////////////////////////////////////////

#include

#include

#include

#include

#include "fb.h"

#include "s3cfb.h"

#define DEV_FB0 "/dev/fb0"

#define DEV_FB1 "/dev/fb1"

#define FILE1 "/overlay/1.bin"

#define FILE2 "/overlay/2.bin"

int stat,err;

int fb0,fb1;

s3c_win_info_t osd_info;

void set_osd_info(){

int input;

osd_info.bpp = 16;

printf("please input left x coordinate\n"); scanf("%d",&input);

osd_info.left_x = input;

printf("please input top y coordinate\n"); scanf("%d",&input);

osd_info.top_y = input;

printf("please input ods width\n"); scanf("%d",&input);

osd_info.width = input;

printf("please input osd height\n"); scanf("%d",&input);

osd_info.height = input;

}

int main(int argc, char *argv[])

{

printf("Begin the OSD test!\n");

if(argc < 2){

printf("Usage: ./osd 1\n"); //reserved return -1;

}

fb0 = open("/dev/fb0",O_RDWR);

if(fb0 < 0) {

printf("open err! fb0 is %d\n",fb0); return -1;

}

fb1 = open("/dev/fb1",O_RDWR);

if(fb1 < 0) {

printf("open err! fb1 is %d\n",fb1); return -1;

}

stat = atoi(argv[1]);

printf("stat is %d\n",stat);

switch(stat){

case 1:

sleep(1);

ioctl(fb1,S3C_FB_OSD_START); break;

printf("err argv!\n");

}

while(1){

printf("Please choose one option:\n");

printf("1. enable the OSD\n");

printf("2. disable the OSD\n");

printf("3. + OSD alpha\n");

printf("4. - OSD alpha\n");

printf("5. set OSD alpha\n");

printf("6. move up OSD\n");

printf("7. move down OSD\n");

printf("8. move left OSD\n");

printf("9. move right OSD\n");

printf("10. SET OSD INFO\n");

printf("0. exit\n");

scanf("%d",&stat);

switch(stat){

case 1:

err = ioctl(fb1,S3C_FB_OSD_START);

if(err < 0) printf("ioctl err =%d",err);

break;

case 2:

err = ioctl(fb1,S3C_FB_OSD_STOP);

if(err < 0) printf("ioctl err =%d",err);

break;

case 3:

err = ioctl(fb1,S3C_FB_OSD_ALPHA_UP);

if(err < 0) printf("ioctl err =%d",err);

break;

case 4:

err = ioctl(fb1,S3C_FB_OSD_ALPHA_DOWN);

if(err < 0) printf("ioctl err =%d",err);

break;

case 5:

printf("please input your alpha level[0~15]\n");

scanf("%d",&stat);

err = ioctl(fb1,S3C_FB_OSD_ALPHA_SET,stat);

if(err < 0) printf("ioctl err =%d",err);

case 6:

err = ioctl(fb1,S3C_FB_OSD_MOVE_UP);

if(err < 0) printf("ioctl err =%d",err);

break;

case 7:

err = ioctl(fb1,S3C_FB_OSD_MOVE_DOWN);

if(err < 0) printf("ioctl err =%d",err);

break;

case 8:

ioctl(fb1,S3C_FB_OSD_MOVE_LEFT);

break;

case 9:

err = ioctl(fb1,S3C_FB_OSD_MOVE_RIGHT);

if(err < 0) printf("ioctl err =%d",err);

break;

case 10:

set_osd_info();

err = ioctl(fb1,S3C_FB_OSD_SET_INFO,&osd_info);

if(err < 0) printf("ioctl err =%d",err);

break;

case 0:

goto exit;

default:

printf("please input number 0~10\n");

}

} //end of while(1)

exit:

sleep(1);

err = ioctl(fb1,S3C_FB_OSD_STOP);

if(err < 0) printf("ioctl err =%d",err);

return 0;

}

///////////////////////////////////////////////////////////////////////

//偷懒直接用脚本cat的图片数据test.sh

///////////////////////////////////////////////////////////////////////

cat ./1.bin > /dev/fb0 cat ./22.bin > /dev/fb1 #cat ./3.bin > /dev/fb2 #cat ./4.bin > /dev/fb3 #cat ./5.bin > /dev/fb4 ./osd 1