[PATCH 09/11] drm/amdgpu:imple ring clear

[Monk Liu]

we can use it clear ring buffer instead of fullfill
0, which is not correct for engine

Change-Id: I89dcd7b6c4de558f9b2860209a2739c7d4af262d
Signed-off-by: Monk Liu <Monk.Liu at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h
index 0e57b04..3fd4ce8 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h
@@ -186,5 +186,12 @@ int amdgpu_ring_init(struct amdgpu_device *adev, struct amdgpu_ring *ring,
 		     unsigned ring_size, struct amdgpu_irq_src *irq_src,
 		     unsigned irq_type);
 void amdgpu_ring_fini(struct amdgpu_ring *ring);
+static inline void amdgpu_ring_clear_ring(struct amdgpu_ring *ring)
+{
+	int i = 0;
+	while (i <= ring->ptr_mask)
+		ring->ring[i++] = ring->funcs->nop;
+
+}
 
 #endif
-- 
2.7.4