The optimization is safe for old GPUs and can help performance. Signed-off-by: Jiansong Chen <Jiansong.Chen@xxxxxxx> Change-Id: Id3b1250f1fe46dddbe8498894fb97e9753b7cafe --- drivers/gpu/drm/amd/amdgpu/gfx_v6_0.c | 6 ++++++ drivers/gpu/drm/amd/amdgpu/gfx_v7_0.c | 6 ++++++ 2 files changed, 12 insertions(+) diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v6_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v6_0.c index 3a8d52a54873..c915cc439484 100644 --- a/drivers/gpu/drm/amd/amdgpu/gfx_v6_0.c +++ b/drivers/gpu/drm/amd/amdgpu/gfx_v6_0.c @@ -1873,6 +1873,12 @@ static void gfx_v6_0_ring_emit_ib(struct amdgpu_ring *ring, amdgpu_ring_write(ring, 0); } + /* drop the CE preamble IB for the same context */ + if ((ib->flags & AMDGPU_IB_FLAG_PREAMBLE) && + !(flags & AMDGPU_HAVE_CTX_SWITCH) && + !(flags & AMDGPU_PREAMBLE_IB_PRESENT_FIRST)) + return; + if (ib->flags & AMDGPU_IB_FLAG_CE) header = PACKET3(PACKET3_INDIRECT_BUFFER_CONST, 2); else diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v7_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v7_0.c index c35fdd2ef2d4..6d9ccae48024 100644 --- a/drivers/gpu/drm/amd/amdgpu/gfx_v7_0.c +++ b/drivers/gpu/drm/amd/amdgpu/gfx_v7_0.c @@ -2269,6 +2269,12 @@ static void gfx_v7_0_ring_emit_ib_gfx(struct amdgpu_ring *ring, amdgpu_ring_write(ring, 0); } + /* drop the CE preamble IB for the same context */ + if ((ib->flags & AMDGPU_IB_FLAG_PREAMBLE) && + !(flags & AMDGPU_HAVE_CTX_SWITCH) && + !(flags & AMDGPU_PREAMBLE_IB_PRESENT_FIRST)) + return; + if (ib->flags & AMDGPU_IB_FLAG_CE) header = PACKET3(PACKET3_INDIRECT_BUFFER_CONST, 2); else -- 2.25.1 _______________________________________________ amd-gfx mailing list amd-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/amd-gfx
