cirros-testvm/src-cirros/buildroot-2015.05/package/libdrm/0001-update-arm.patch

   1 [Adapted from yocto project]
   2
   3 Add ARM support into xf86drm.h.  This provides support for Xorg interface.
   4 Without this the vivante samples will hang during close requiring a reboot
   5
   6 Upstream-Status: Pending
   7
   8 Signed-off-by: Lauren Post <lauren.post@freescale.com>
   9 Signed-off-by: Evan Kotara <evan.kotara@freescale.com>
  10
  11 diff --git a/xf86drm.h b/xf86drm.h
  12 --- a/xf86drm.h
  13 +++ b/xf86drm.h
  14 @@ -461,6 +461,23 @@ do {       register unsigned int __old __asm("
  15                 : "cr0", "memory");                     \
  16         } while (0)
  17
  18 +#elif defined(__arm__)
  19 +       #undef DRM_DEV_MODE
  20 +       #define DRM_DEV_MODE     (S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH)
  21 +
  22 +       #define DRM_CAS(lock,old,new,__ret)             \
  23 +       do {                                            \
  24 +               __asm__ __volatile__ (                  \
  25 +                       "1: ldrex %0, [%1]\n"           \
  26 +                       "   teq %0, %2\n"               \
  27 +                       "   ite eq\n"                   \
  28 +                       "   strexeq %0, %3, [%1]\n"     \
  29 +                       "   movne   %0, #1\n"           \
  30 +               : "=&r" (__ret)                         \
  31 +               : "r" (lock), "r" (old), "r" (new)      \
  32 +               : "cc","memory");                       \
  33 +       } while (0)
  34 +
  35  #endif /* architecture */
  36  #endif /* __GNUC__ >= 2 */
  37