From: Mario Limonciello <mario.limoncie...@amd.com>
AMD RX580 when added AMD Phenom 2 has problems with overheating. This is due to
changes with PCIe dynamic switching introduced by commit 466a7d115326e
("drm/amd: Use the first non-dGPU PCI device for BW limits").
To avoid risks of other issues with old hardware require at least Zen hardware
for AMD side to enable PCIe dynamic switching.
Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/4098
Fixes: 466a7d115326e ("drm/amd: Use the first non-dGPU PCI device for BW
limits")
Signed-off-by: Mario Limonciello <mario.limoncie...@amd.com>
---
v2:
* Cover more hardware
---
drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index a30111d2c3ea0..caa44ee788c8f 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -1854,6 +1854,9 @@ bool amdgpu_device_seamless_boot_supported(struct
amdgpu_device *adev)
*
*
https://edc.intel.com/content/www/us/en/design/products/platforms/details/raptor-lake-s/13th-generation-core-processors-datasheet-volume-1-of-2/005/pci-express-support/
* https://gitlab.freedesktop.org/drm/amd/-/issues/2663
+ *
+ * AMD Phenom II X6 1090T has a similar issue
+ * https://gitlab.freedesktop.org/drm/amd/-/issues/4098
*/
static bool amdgpu_device_pcie_dynamic_switching_supported(struct
amdgpu_device *adev)
{
@@ -1866,6 +1869,8 @@ static bool
amdgpu_device_pcie_dynamic_switching_supported(struct amdgpu_device
if (c->x86_vendor == X86_VENDOR_INTEL)
return false;
+ if (c->x86_vendor == X86_VENDOR_AMD &&
!cpu_feature_enabled(X86_FEATURE_ZEN))
+ return false;
#endif
return true;
}
--
2.43.0
