drm/amdgpu: only check for _PR3 on dGPUs

We don't support runtime pm on APUs.  They support more
dynamic power savings using clock and powergating.

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

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
index abd9bfa419ea7cdda9b9d508dc5b71570e6da757..5febf83aab5c5afc4d87137b6e5d811d56b9dd3d 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
@@ -144,8 +144,10 @@ int amdgpu_driver_load_kms(struct amdgpu_device *adev, unsigned long flags)
            !pci_is_thunderbolt_attached(to_pci_dev(dev->dev)))
                flags |= AMD_IS_PX;
 
-       parent = pci_upstream_bridge(adev->pdev);
-       adev->has_pr3 = parent ? pci_pr3_present(parent) : false;
+       if (!(flags & AMD_IS_APU)) {
+               parent = pci_upstream_bridge(adev->pdev);
+               adev->has_pr3 = parent ? pci_pr3_present(parent) : false;
+       }
 
        /* amdgpu_device_init should report only fatal error
         * like memory allocation failure or iomapping failure,