drm/radeon: set the full cache bit for fences on r7xx+
Needed to properly flush the read caches for fences.
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
diff --git a/drivers/gpu/drm/radeon/r600d.h b/drivers/gpu/drm/radeon/r600d.h
index 3fca4b9..37455f6 100644
--- a/drivers/gpu/drm/radeon/r600d.h
+++ b/drivers/gpu/drm/radeon/r600d.h
@@ -1582,6 +1582,7 @@
# define PACKET3_CP_DMA_CMD_DAIC (1 << 29)
#define PACKET3_SURFACE_SYNC 0x43
# define PACKET3_CB0_DEST_BASE_ENA (1 << 6)
+# define PACKET3_FULL_CACHE_ENA (1 << 20) /* r7xx+ only */
# define PACKET3_TC_ACTION_ENA (1 << 23)
# define PACKET3_VC_ACTION_ENA (1 << 24)
# define PACKET3_CB_ACTION_ENA (1 << 25)