drm/radeon/kms: add support for semaphores v3

They are used to sync between rings, while fences
sync between a ring and the cpu.

v2 Fix radeon_semaphore_driver_fini when no semaphore were
allocated.

v3 Initialize list early on to avoid issue in case or early
error

Signed-off-by: Christian König <deathsimple@vodafone.de>
Signed-off-by: Jerome Glisse <jglisse@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/gpu/drm/radeon/evergreen.c b/drivers/gpu/drm/radeon/evergreen.c
index 1c7af5654336..233cbc0a2b59 100644
--- a/drivers/gpu/drm/radeon/evergreen.c
+++ b/drivers/gpu/drm/radeon/evergreen.c
@@ -1448,7 +1448,7 @@ int evergreen_cp_resume(struct radeon_device *rdev)
         tmp |= BUF_SWAP_32BIT;
 #endif
         WREG32(CP_RB_CNTL, tmp);
-        WREG32(CP_SEM_WAIT_TIMER, 0x4);
+        WREG32(CP_SEM_WAIT_TIMER, 0x0);
 
         /* Set the write pointer delay */
         WREG32(CP_RB_WPTR_DELAY, 0);
@@ -3290,6 +3290,7 @@ void evergreen_fini(struct radeon_device *rdev)
         evergreen_pcie_gart_fini(rdev);
         r600_vram_scratch_fini(rdev);
         radeon_gem_fini(rdev);
+        radeon_semaphore_driver_fini(rdev);
         radeon_fence_driver_fini(rdev);
         radeon_agp_fini(rdev);
         radeon_bo_fini(rdev);