drm/amdgpu/gmc9: remove dummy read workaround for newer chips

Aldebaran has a hw fix so no longer requires the workaround.

Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
index f354f67..455bb91 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
@@ -574,7 +574,8 @@ static int gmc_v9_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_ALDEBARAN))
                RREG32(hub->vm_l2_pro_fault_status);
 
        status = RREG32(hub->vm_l2_pro_fault_status);
@@ -802,7 +803,8 @@ static void gmc_v9_0_flush_gpu_tlb(struct amdgpu_device *adev, uint32_t vmid,
                 * 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_ALDEBARAN))
                        RREG32_NO_KIQ(hub->vm_inv_eng0_req +
                                      hub->eng_distance * eng);