Am 13.05.21 um 05:21 schrieb Jiansong Chen:
Take the situation with gfxoff, the optimization may cause corrupt CE ram contents. In addition emit_cntxcntl callback has similar optimization which firmware can handle properly even for power feature.
NAK, it is the whole purpose of the preamble IB to be dropped if there isn't a context switch.
You are completely disabling this feature with that. Christian.
Signed-off-by: Jiansong Chen <jiansong.c...@amd.com> Change-Id: I962946557108bb0575f8b2afc25b18a6dcf0d838 --- drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c | 11 +---------- 1 file changed, 1 insertion(+), 10 deletions(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c index 2e6789a7dc46..77baf9b48d67 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c @@ -130,7 +130,7 @@ int amdgpu_ib_schedule(struct amdgpu_ring *ring, unsigned num_ibs, struct amdgpu_device *adev = ring->adev; struct amdgpu_ib *ib = &ibs[0]; struct dma_fence *tmp = NULL; - bool skip_preamble, need_ctx_switch; + bool need_ctx_switch; unsigned patch_offset = ~0; struct amdgpu_vm *vm; uint64_t fence_ctx; @@ -227,7 +227,6 @@ int amdgpu_ib_schedule(struct amdgpu_ring *ring, unsigned num_ibs, if (need_ctx_switch) status |= AMDGPU_HAVE_CTX_SWITCH;- skip_preamble = ring->current_ctx == fence_ctx;if (job && ring->funcs->emit_cntxcntl) { status |= job->preamble_status; status |= job->preemption_status; @@ -245,14 +244,6 @@ int amdgpu_ib_schedule(struct amdgpu_ring *ring, unsigned num_ibs, for (i = 0; i < num_ibs; ++i) { ib = &ibs[i];- /* 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) && - !amdgpu_mcbp && - !amdgpu_sriov_vf(adev)) /* for SRIOV preemption, Preamble CE ib must be inserted anyway */ - continue; - if (job && ring->funcs->emit_frame_cntl) { if (secure != !!(ib->flags & AMDGPU_IB_FLAGS_SECURE)) { amdgpu_ring_emit_frame_cntl(ring, false, secure);
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