libdrm: fix support for xserver with Vivante drivers

[Thomas: fix minor typo in patch description.]

Signed-off-by: Jérôme Pouiller <jezz@sysmic.org>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
This commit is contained in:
Jérôme Pouiller 2014-12-09 14:46:46 +01:00 committed by Thomas Petazzoni
parent 8ec52d57ec
commit 94841d87fd

View File

@ -0,0 +1,37 @@
[Adapted from yocto project]
Add ARM support into xf86drm.h. This provides support for Xorg interface.
Without this the vivante samples will hang during close requiring a reboot
Upstream-Status: Pending
Signed-off-by: Lauren Post <lauren.post@freescale.com>
Signed-off-by: Evan Kotara <evan.kotara@freescale.com>
diff --git a/xf86drm.h b/xf86drm.h
--- a/xf86drm.h
+++ b/xf86drm.h
@@ -461,6 +461,23 @@ do { register unsigned int __old __asm("
: "cr0", "memory"); \
} while (0)
+#elif defined(__arm__)
+ #undef DRM_DEV_MODE
+ #define DRM_DEV_MODE (S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH)
+
+ #define DRM_CAS(lock,old,new,__ret) \
+ do { \
+ __asm__ __volatile__ ( \
+ "1: ldrex %0, [%1]\n" \
+ " teq %0, %2\n" \
+ " ite eq\n" \
+ " strexeq %0, %3, [%1]\n" \
+ " movne %0, #1\n" \
+ : "=&r" (__ret) \
+ : "r" (lock), "r" (old), "r" (new) \
+ : "cc","memory"); \
+ } while (0)
+
#endif /* architecture */
#endif /* __GNUC__ >= 2 */