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drm/amdgpu/gmc10: remove dummy read workaround for newer chips

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Sienna Cichlid and newer have a hw fix so no longer require
the workaround.

Reviewed-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher 2020-10-16 12:56:26 -04:00
parent 1ed685df7e
commit 5c46c49276
1 changed files with 4 additions and 2 deletions
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6
drivers/gpu/drm/amd/amdgpu/gmc_v10_0.c
View file

@ -107,7 +107,8 @@ static int gmc_v10_0_process_interrupt(struct amdgpu_device *adev,
* be updated to avoid reading an incorrect value due to
* the new fast GRBM interface.
*/
if (entry->vmid_src == AMDGPU_GFXHUB_0)
if ((entry->vmid_src == AMDGPU_GFXHUB_0) &&
(adev->asic_type < CHIP_SIENNA_CICHLID))
RREG32(hub->vm_l2_pro_fault_status);
status = RREG32(hub->vm_l2_pro_fault_status);
@ -232,7 +233,8 @@ static void gmc_v10_0_flush_vm_hub(struct amdgpu_device *adev, uint32_t vmid,
* Issue a dummy read to wait for the ACK register to be cleared
* to avoid a false ACK due to the new fast GRBM interface.
*/
if (vmhub == AMDGPU_GFXHUB_0)
if ((vmhub == AMDGPU_GFXHUB_0) &&
(adev->asic_type < CHIP_SIENNA_CICHLID))
RREG32_NO_KIQ(hub->vm_inv_eng0_req + hub->eng_distance * eng);
/* Wait for ACK with a delay.*/