set bit 21 of IB.control filed to actually enable
MCBP for SRIOV

Change-Id: Ie5126d5be95e037087cf7167c28c61975f40d784
Signed-off-by: Monk Liu <[email protected]>
---
 drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c 
b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
index ad82ab7..0d8fb51 100644
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
@@ -3016,6 +3016,9 @@ static void gfx_v9_0_ring_emit_ib_gfx(struct amdgpu_ring 
*ring,
 
         control |= ib->length_dw | (vm_id << 24);
 
+               if (amdgpu_sriov_vf(ring->adev) && (ib->flags & 
AMDGPU_IB_FLAG_PREEMPT))
+                       control |= (1 << 21);
+
         amdgpu_ring_write(ring, header);
        BUG_ON(ib->gpu_addr & 0x3); /* Dword align */
         amdgpu_ring_write(ring,
-- 
2.7.4

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