The out of order execution of semaphore commands on
pre cayman asics doesn't work correctly and can
cause deadlocks, so turn it off for now.
Signed-off-by: Christian K?nig <deathsimple at vodafone.de>
---
drivers/gpu/drm/radeon/r600.c | 3 +++
drivers/gpu/drm/radeon/r600d.h | 1 +
2 files changed, 4 insertions(+), 0 deletions(-)
diff --git a/drivers/gpu/drm/radeon/r600.c b/drivers/gpu/drm/radeon/r600.c
index 8a6d68c..f0b3323 100644
--- a/drivers/gpu/drm/radeon/r600.c
+++ b/drivers/gpu/drm/radeon/r600.c
@@ -2362,6 +2362,9 @@ void r600_semaphore_ring_emit(struct radeon_device *rdev,
uint64_t addr = semaphore->gpu_addr;
unsigned sel = emit_wait ? PACKET3_SEM_SEL_WAIT :
PACKET3_SEM_SEL_SIGNAL;
+ if (rdev->family < CHIP_CAYMAN)
+ sel |= PACKET3_SEM_WAIT_ON_SIGNAL;
+
radeon_ring_write(ring, PACKET3(PACKET3_MEM_SEMAPHORE, 1));
radeon_ring_write(ring, addr & 0xffffffff);
radeon_ring_write(ring, (upper_32_bits(addr) & 0xff) | sel);
diff --git a/drivers/gpu/drm/radeon/r600d.h b/drivers/gpu/drm/radeon/r600d.h
index 2ba460b..8ae328f 100644
--- a/drivers/gpu/drm/radeon/r600d.h
+++ b/drivers/gpu/drm/radeon/r600d.h
@@ -850,6 +850,7 @@
#define PACKET3_STRMOUT_BUFFER_UPDATE 0x34
#define PACKET3_INDIRECT_BUFFER_MP 0x38
#define PACKET3_MEM_SEMAPHORE 0x39
+# define PACKET3_SEM_WAIT_ON_SIGNAL (0x1 << 12)
# define PACKET3_SEM_SEL_SIGNAL (0x6 << 29)
# define PACKET3_SEM_SEL_WAIT (0x7 << 29)
#define PACKET3_MPEG_INDEX 0x3A
--
1.7.5.4
