MeowOS Dev
245bee2946
• 全新单提交：清除含敏感信息的旧历史（sudo 口令、内网 IP、SSH 密钥路径、热点 SSID、设备 MAC） • 本地开发文档/测试记录/构建脚本全部移入 gitignored 的 devdocs/ 与 scripts/build/（不入库） • 保留：MeowOS 源码（launcher/watchdog/bootmenu/meow_svcd/SDK）、项目规范文档、mips-repo 增补组件：SDK 统一日志+通知 API、meow_svcd 服务管理器、mips-repo 软件仓库
65 lines
2.3 KiB
C
65 lines
2.3 KiB
C
/* fbpantest2.c — does fb0 actually PAN? Print ioctl return + errno.
|
|
* Key question: is the display pannable via FBIOPAN_DISPLAY/FBIOPUT_VSCREENINFO,
|
|
* or is the double buffer flipped by direct LCDC register writes (desar) that
|
|
* the fb var yoffset never reflects?
|
|
*/
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
#include <fcntl.h>
|
|
#include <sys/ioctl.h>
|
|
#include <errno.h>
|
|
#include <stdint.h>
|
|
|
|
#define GETV 0x4600
|
|
|
|
static int get_info(int fd, uint32_t *yoff, uint32_t *yres) {
|
|
unsigned char v[160]; memset(v,0,sizeof v);
|
|
if (ioctl(fd, GETV, v) < 0) return -1;
|
|
*yres = *(uint32_t*)(v + 4);
|
|
*yoff = *(uint32_t*)(v + 20);
|
|
return 0;
|
|
}
|
|
|
|
int main(void) {
|
|
int fd = open("/dev/fb0", O_RDWR);
|
|
if (fd < 0) { perror("open"); return 1; }
|
|
uint32_t orig=0,yres=0; get_info(fd,&orig,&yres);
|
|
uint32_t target=(orig<yres)?yres:0;
|
|
printf("orig yoffset=%u yres=%u target=%u\n", orig,yres,target);
|
|
|
|
unsigned char v[160];
|
|
memset(v,0,sizeof v);
|
|
ioctl(fd, GETV, v);
|
|
*(uint32_t*)(v+16)=0; *(uint32_t*)(v+20)=target;
|
|
v[84]=0; /* activate = 0 (implies activate-on-next?) */
|
|
|
|
errno=0;
|
|
int r6=ioctl(fd, 0x4606, v);
|
|
int e6=errno; errno=0;
|
|
uint32_t now=0; get_info(fd,&now,&yres);
|
|
printf("PAN_DISPLAY(0x4606) r=%d errno=%d(%s) -> yoffset now %u\n", r6,e6,strerror(e6),now);
|
|
if (now==target) { errno=0; ioctl(fd,0x4606,v); /* restore */ }
|
|
|
|
/* now try PUT_VSCREENINFO with activate=FB_ACTIVATE_NOW */
|
|
memset(v,0,sizeof v); ioctl(fd, GETV, v);
|
|
*(uint32_t*)(v+16)=0; *(uint32_t*)(v+20)=target;
|
|
errno=0;
|
|
int r1=ioctl(fd, 0x4601, v);
|
|
int e1=errno; errno=0;
|
|
get_info(fd,&now,&yres);
|
|
printf("PUT_VSCREENINFO(0x4601) r=%d errno=%d(%s) -> yoffset now %u\n", r1,e1,strerror(e1),now);
|
|
if (now==target) { memset(v,0,sizeof v); ioctl(fd,GETV,v); *(uint32_t*)(v+16)=0; *(uint32_t*)(v+20)=orig; ioctl(fd,0x4601,v); }
|
|
|
|
/* getid; also read FBIOGET_DISPINFO(0x4618) */
|
|
unsigned char d[256]; memset(d,0,sizeof d);
|
|
errno=0;
|
|
int rd=ioctl(fd, 0x4618, d);
|
|
int ed=errno;
|
|
printf("GET_DISPINFO(0x4618) r=%d errno=%d(%s)\n", rd, ed, strerror(ed));
|
|
for (unsigned i=0;i<64;i+=4){ if (*(uint32_t*)(d+i)) printf(" d[%u]=%08x\n", i, *(uint32_t*)(d+i)); }
|
|
close(fd);
|
|
return 0;
|
|
}
|