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drm/amdgpu: disable mcbp if parameter zero is set

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The parameter amdgpu_mcbp shall have priority against the default value
calculated from the chip version.
User could disable mcbp by setting the parameter mcbp as zero.

v2: do not trigger preemption in sw ring muxer when mcbp is disabled.

Signed-off-by: Jiadong Zhu <Jiadong.Zhu@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Jiadong Zhu
2023-08-08 10:59:25 +08:00
committed by Alex Deucher
parent b6360a5ec3
commit 0d6f374c0c
2 changed files with 6 additions and 5 deletions
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2
drivers/gpu/drm/amd/amdgpu/amdgpu_ring_mux.c
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@@ -397,7 +397,7 @@ void amdgpu_sw_ring_ib_begin(struct amdgpu_ring *ring)
struct amdgpu_ring_mux *mux = &adev->gfx.muxer;
WARN_ON(!ring->is_sw_ring);
if (ring->hw_prio > AMDGPU_RING_PRIO_DEFAULT) {
if (adev->gfx.mcbp && ring->hw_prio > AMDGPU_RING_PRIO_DEFAULT) {
if (amdgpu_mcbp_scan(mux) > 0)
amdgpu_mcbp_trigger_preempt(mux);
return;