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ecore vsync - work around old kernels by blacklisting them 

this is a bug workaround apparently old kernels that seems to get
vsync and timestamps wrong. 3.14 kernels and up only for now

@bug
This commit is contained in:
Carsten Haitzler 2014-08-27 18:26:58 +09:00
parent e876ec527f
commit e4ed80dc1e
1 changed files with 21 additions and 0 deletions
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21
src/lib/ecore_x/xlib/ecore_x_vsync.c
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@ -356,6 +356,27 @@ _drm_init(void)
*/
return 0;
}
// only do this on new kernels = let's say 3.14 and up. 3.16 definitely
// works
{
Eina_Bool ok = EINA_FALSE;
FILE *fp = fopen("/proc/sys/kernel/osrelease", "r");
if (fp)
{
if (fgets(buf, sizeof(buf), fp))
{
int vmaj = 0, vmin = 0;
if (sscanf(buf, "%i.%i.%*s", &vmaj, &vmin) == 2)
{
if ((vmaj >= 3) && (vmin >= 14)) ok = EINA_TRUE;
}
}
fclose(fp);
}
if (!ok) return 0;
}
snprintf(buf, sizeof(buf), "/dev/dri/card1");
if (stat(buf, &st) == 0)