From 87dfeb47a5f48e0831071f5b69eb4ec3147fd56b Mon Sep 17 00:00:00 2001 From: Alex Deucher Date: Wed, 15 May 2024 11:25:49 -0400 Subject: drm/amdgpu: Adjust logic in amdgpu_device_partner_bandwidth() MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Use current speed/width on devices which don't support dynamic PCIe switching. Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/3289 Acked-by: Christian König Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 19 ++++++++++++------- 1 file changed, 12 insertions(+), 7 deletions(-) (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_device.c') diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c index bf1a6593dc5e..f5168b4c3b03 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c @@ -5948,13 +5948,18 @@ 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); } } -- cgit