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| author | Monk Liu <Monk.Liu@amd.com> | 2019-09-24 16:08:00 +0800 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2019-10-03 09:11:01 -0500 |
| commit | e7da754b00ee40af55e522f9dc478d8ed3a3ad3d (patch) | |
| tree | 1dc570863d12159de86f36c1ccfbf8fcb5731319 /drivers/gpu/drm/amd/amdgpu/amdgpu_umc.h | |
| parent | 6de088a08ddc4876947e3319c98df116257e6ea5 (diff) | |
drm/amdgpu: fix an UMC hw arbitrator bug(v3)
issue:
the UMC6 h/w bug is that when MCLK is doing the switch
in the middle of a page access being preempted by high
priority client (e.g. DISPLAY) then UMC and the mclk switch
would stuck there due to deadlock
how:
fixed by disabling auto PreChg for UMC to avoid high
priority client preempting other client's access on
the same page, thus the deadlock could be avoided
v2:
put the patch in callback of UMC6
v3:
rename the callback to "init_registers"
Signed-off-by: Monk Liu <Monk.Liu@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Hawking Zhang <hawking.zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_umc.h')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_umc.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_umc.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_umc.h index 3ec36d9e012a..c907b14c9be8 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_umc.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_umc.h @@ -63,6 +63,7 @@ struct amdgpu_umc_funcs { void (*enable_umc_index_mode)(struct amdgpu_device *adev, uint32_t umc_instance); void (*disable_umc_index_mode)(struct amdgpu_device *adev); + void (*init_registers)(struct amdgpu_device *adev); }; struct amdgpu_umc { |