drm/amdgpu:Preamble is forbid to be ignored in SRIOV

SR-IOV requires the preamble.

Signed-off-by: Monk Liu <Monk.Liu@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c
index 38dded5..5329ac9 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c
@@ -193,7 +193,8 @@ int amdgpu_ib_schedule(struct amdgpu_ring *ring, unsigned num_ibs,
                /* drop preamble IBs if we don't have a context switch */
                if ((ib->flags & AMDGPU_IB_FLAG_PREAMBLE) &&
                        skip_preamble &&
-                       !(status & AMDGPU_PREAMBLE_IB_PRESENT_FIRST))
+                       !(status & AMDGPU_PREAMBLE_IB_PRESENT_FIRST) &&
+                       !amdgpu_sriov_vf(adev)) /* for SRIOV preemption, Preamble CE ib must be inserted anyway */
                        continue;
 
                amdgpu_ring_emit_ib(ring, ib, job ? job->vm_id : 0,