diff options
| author | Lijo Lazar <lijo.lazar@amd.com> | 2025-09-29 17:59:26 +0530 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2025-10-07 14:09:19 -0400 |
| commit | 9b608fe94870fe46bd2c41fcda99e74dabd6bbc6 (patch) | |
| tree | 6bf610607c0933990f8e649a1a95871f30709a44 | |
| parent | 1f086d2508ebe494d13fd587d1f5e2b908379efc (diff) | |
drm/amdgpu: Check swus/ds for switch state save
For saving switch state, check if the GPU is having SWUS/DS
architecture. Otherwise, skip saving.
Reported-by: Roman Elshin <roman.elshin@gmail.com>
Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/4602
Fixes: 1dd2fa0e00f1 ("drm/amdgpu: Save and restore switch state")
Signed-off-by: Lijo Lazar <lijo.lazar@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 23 |
1 files changed, 15 insertions, 8 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c index a77000c2e0bb..929936c8d87c 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c @@ -7157,28 +7157,35 @@ void amdgpu_pci_resume(struct pci_dev *pdev) static void amdgpu_device_cache_switch_state(struct amdgpu_device *adev) { - struct pci_dev *parent = pci_upstream_bridge(adev->pdev); + struct pci_dev *swus, *swds; int r; - if (!parent || parent->vendor != PCI_VENDOR_ID_ATI) + swds = pci_upstream_bridge(adev->pdev); + if (!swds || swds->vendor != PCI_VENDOR_ID_ATI || + pci_pcie_type(swds) != PCI_EXP_TYPE_DOWNSTREAM) + return; + swus = pci_upstream_bridge(swds); + if (!swus || + (swus->vendor != PCI_VENDOR_ID_ATI && + swus->vendor != PCI_VENDOR_ID_AMD) || + pci_pcie_type(swus) != PCI_EXP_TYPE_UPSTREAM) return; /* If already saved, return */ if (adev->pcie_reset_ctx.swus) return; /* Upstream bridge is ATI, assume it's SWUS/DS architecture */ - r = pci_save_state(parent); + r = pci_save_state(swds); if (r) return; - adev->pcie_reset_ctx.swds_pcistate = pci_store_saved_state(parent); + adev->pcie_reset_ctx.swds_pcistate = pci_store_saved_state(swds); - parent = pci_upstream_bridge(parent); - r = pci_save_state(parent); + r = pci_save_state(swus); if (r) return; - adev->pcie_reset_ctx.swus_pcistate = pci_store_saved_state(parent); + adev->pcie_reset_ctx.swus_pcistate = pci_store_saved_state(swus); - adev->pcie_reset_ctx.swus = parent; + adev->pcie_reset_ctx.swus = swus; } static void amdgpu_device_load_switch_state(struct amdgpu_device *adev) |