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drm/amdgpu: Adjust logic in amdgpu_device_partner_bandwidth()

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

Fixes: 466a7d1153 ("drm/amd: Use the first non-dGPU PCI device for BW limits")
Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/3289
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher 2024-05-15 11:25:49 -04:00
parent 8195979d2d
commit ba46b3bda2
1 changed files with 12 additions and 7 deletions
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19
drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
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@ -5944,13 +5944,18 @@ static void amdgpu_device_partner_bandwidth(struct amdgpu_device *adev,
*speed = PCI_SPEED_UNKNOWN;
*width = PCIE_LNK_WIDTH_UNKNOWN;
while ((parent = pci_upstream_bridge(parent))) {
/* skip upstream/downstream switches internal to dGPU*/
if (parent->vendor == PCI_VENDOR_ID_ATI)
continue;
*speed = pcie_get_speed_cap(parent);
*width = pcie_get_width_cap(parent);
break;
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)
continue;
*speed = pcie_get_speed_cap(parent);
*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);
}
}