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| author | Mario Limonciello <mario.limonciello@amd.com> | 2026-07-08 22:15:20 -0500 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2026-07-15 09:15:42 -0400 |
| commit | 9ceb4e034a327a04155f32f1cd1a5031dfa5fe02 (patch) | |
| tree | 69467a4680e7e7e95aaf7dbb5b64f331182fef95 /drivers | |
| parent | bc639a9eadc75822f7f15a4315c198a4b5513bd2 (diff) | |
| download | linux-next-9ceb4e034a327a04155f32f1cd1a5031dfa5fe02.tar.gz linux-next-9ceb4e034a327a04155f32f1cd1a5031dfa5fe02.zip | |
drm/amdgpu: Disable PCIe dynamic speed switching on Ryzen Pinnacle Ridge
AMD Ryzen Pinnacle Ridge (Zen+, family 0x17 model 0x08) CPUs have
PCI controllers that don't support PCIe dynamic speed switching,
causing system freezes during GPU initialization when enabled.
Disable dynamic speed switching when this CPU is detected.
Assisted-by: Claude:sonnet
Fixes: 466a7d115326 ("drm/amd: Use the first non-dGPU PCI device for BW limits")
Closes: https://gitlab.freedesktop.org/drm/amd/-/work_items/5436
Reviewed-by: Lijo Lazar <lijo.lazar@amd.com>
Link: https://patch.msgid.link/20260709031520.841611-1-mario.limonciello@amd.com
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c index b39ec5ed6242..fa97281f6c4c 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c @@ -1222,6 +1222,15 @@ static bool amdgpu_device_pcie_dynamic_switching_supported(struct amdgpu_device if (c->x86_vendor == X86_VENDOR_INTEL) return false; + + /* + * AMD Ryzen Pinnacle Ridge (Zen+, family 0x17 model 0x08) CPUs don't + * support PCIe dynamic speed switching. + * https://gitlab.freedesktop.org/drm/amd/-/work_items/5436 + */ + if (c->x86_vendor == X86_VENDOR_AMD && c->x86 == 0x17 && + c->x86_model == 0x08) + return false; #endif return true; } |