Commit ba46b3bd authored by Alex Deucher's avatar Alex Deucher
Browse files

drm/amdgpu: Adjust logic in amdgpu_device_partner_bandwidth() 

Use current speed/width on devices which don't support
dynamic PCIe switching.

Fixes: 466a7d11 ("drm/amd: Use the first non-dGPU PCI device for BW limits")
Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/3289


Acked-by: default avatarChristian König <christian.koenig@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 8195979d

drivers/gpu/drm/amd/amdgpu/amdgpu_device.c

+12 −7
Original line number Diff line number Diff line
@@ -5944,6 +5944,7 @@ static void amdgpu_device_partner_bandwidth(struct amdgpu_device *adev, 
	*speed = PCI_SPEED_UNKNOWN;

	*width = PCIE_LNK_WIDTH_UNKNOWN;



	if (amdgpu_device_pcie_dynamic_switching_supported(adev)) {

		while ((parent = pci_upstream_bridge(parent))) {

			/* skip upstream/downstream switches internal to dGPU*/

			if (parent->vendor == PCI_VENDOR_ID_ATI)
@@ -5952,6 +5953,10 @@ static void amdgpu_device_partner_bandwidth(struct amdgpu_device *adev, 
			*width = pcie_get_width_cap(parent);

			break;

		}

	} else {

		/* use the current speeds rather than max if switching is not supported */

		pcie_bandwidth_available(adev->pdev, NULL, speed, width);

	}

}



/**