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drm/amdgpu: disable ring_muxer if mcbp is off

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Using the ring_muxer without preemption adds overhead for no
reason since mcbp cannot be triggered.

Moving back to a single queue in this case also helps when
high priority app are used: in this case the gpu_scheduler
priority handling will work as expected - much better than
ring_muxer with its 2 independant schedulers competing for
the same hardware queue.

This change requires moving amdgpu_device_set_mcbp above
amdgpu_device_ip_early_init because we use adev->gfx.mcbp.

Signed-off-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Acked-by: Jiadong Zhu <Jiadong.Zhu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Pierre-Eric Pelloux-Prayer
2024-02-16 16:20:44 +01:00
committed by Alex Deucher
parent 190145f692
commit bf909454fe
2 changed files with 14 additions and 11 deletions
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4
drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
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@@ -4056,13 +4056,13 @@ int amdgpu_device_init(struct amdgpu_device *adev,
goto unmap_memory;
}
amdgpu_device_set_mcbp(adev);
/* early init functions */
r = amdgpu_device_ip_early_init(adev);
if (r)
goto unmap_memory;
amdgpu_device_set_mcbp(adev);
/* Get rid of things like offb */
r = drm_aperture_remove_conflicting_pci_framebuffers(adev->pdev, &amdgpu_kms_driver);
if (r)