[PATCH 5.16 0027/1017] drm/amdgpu: only check for _PR3 on dGPUs

Greg Kroah-Hartman
2022-04-05T08:56:42Z

From: Alex Deucher <alexander.deucher@amd.com>

commit 85ac2021fe3ace59cc0afd6edf005abad35625b0 upstream.

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

Reviewed-by: Mario Limonciello <mario.limonciello@amd.com>
Tested-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)

--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -2144,8 +2144,10 @@ static int amdgpu_device_ip_early_init(s
!pci_is_thunderbolt_attached(to_pci_dev(dev->dev)))
adev->flags |= AMD_IS_PX;

- parent = pci_upstream_bridge(adev->pdev);
- adev->has_pr3 = parent ? pci_pr3_present(parent) : false;
+ if (!(adev->flags & AMD_IS_APU)) {
+ parent = pci_upstream_bridge(adev->pdev);
+ adev->has_pr3 = parent ? pci_pr3_present(parent) : false;
+ }

amdgpu_amdkfd_device_probe(adev);