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fbdev patch from Philippe Troin

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This commit is contained in:
Bill Currie 2009-12-20 05:41:08 +00:00 committed by Jeff Teunissen
parent 4ff2cb88cf
commit 61366f081b
1 changed files with 12 additions and 3 deletions
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15
libs/video/targets/vid_fbdev.c
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@ -284,6 +284,15 @@ VID_SetMode (const char *name, unsigned char *palette)
struct fb_fix_screeninfo fix;
int err;
unsigned long smem_start, smem_offset;
long pagesize, pagemask;
errno = 0;
pagesize = sysconf(_SC_PAGESIZE);
if (errno) {
Con_Printf("Cannot get page size: %s\n", strerror(errno));
return 0;
}
pagemask = ~(pagesize-1);
vmode = FindVideoMode(name);
if (!vmode) {
@ -323,9 +332,9 @@ VID_SetMode (const char *name, unsigned char *palette)
err = ioctl(fb_fd, FBIOGET_FSCREENINFO, &fix);
if (err)
Sys_Error ("Video mode failed: %s", name);
smem_start = (unsigned long)fix.smem_start & PAGE_MASK;
smem_offset = (unsigned long)fix.smem_start & ~PAGE_MASK;
fb_map_length = (smem_offset+fix.smem_len+~PAGE_MASK) & PAGE_MASK;
smem_start = (unsigned long)fix.smem_start & pagemask;
smem_offset = (unsigned long)fix.smem_start & ~pagemask;
fb_map_length = (smem_offset+fix.smem_len+~pagemask) & pagemask;
fb_map_addr = mmap(0, fb_map_length, PROT_WRITE, MAP_SHARED,
fb_fd, 0);
if (!fb_map_addr)