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drm/amd/amdgpu: disable ASPM in some situations

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disable ASPM with some ASICs on some specific platforms.
required from PCIe controller owner.

Signed-off-by: Kenneth Feng <kenneth.feng@amd.com>
Reviewed-by: Yang Wang <kevinyang.wang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Kenneth Feng
2025-04-01 16:04:41 +08:00
committed by Alex Deucher
parent 0ec7535f5b
commit c770ef1967
1 changed files with 32 additions and 0 deletions
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32
drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
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@@ -85,6 +85,7 @@
#if IS_ENABLED(CONFIG_X86)
#include <asm/intel-family.h>
#include <asm/cpu_device_id.h>
#endif
MODULE_FIRMWARE("amdgpu/vega10_gpu_info.bin");
@@ -1873,6 +1874,35 @@ static bool amdgpu_device_pcie_dynamic_switching_supported(struct amdgpu_device
return true;
}
static bool amdgpu_device_aspm_support_quirk(struct amdgpu_device *adev)
{
#if IS_ENABLED(CONFIG_X86)
struct cpuinfo_x86 *c = &cpu_data(0);
if (!(amdgpu_ip_version(adev, GC_HWIP, 0) == IP_VERSION(12, 0, 0) ||
amdgpu_ip_version(adev, GC_HWIP, 0) == IP_VERSION(12, 0, 1)))
return false;
if (c->x86 == 6 &&
adev->pm.pcie_gen_mask & CAIL_PCIE_LINK_SPEED_SUPPORT_GEN5) {
switch (c->x86_model) {
case VFM_MODEL(INTEL_ALDERLAKE):
case VFM_MODEL(INTEL_ALDERLAKE_L):
case VFM_MODEL(INTEL_RAPTORLAKE):
case VFM_MODEL(INTEL_RAPTORLAKE_P):
case VFM_MODEL(INTEL_RAPTORLAKE_S):
return true;
default:
return false;
}
} else {
return false;
}
#else
return false;
#endif
}
/**
* amdgpu_device_should_use_aspm - check if the device should program ASPM
*
@@ -1897,6 +1927,8 @@ bool amdgpu_device_should_use_aspm(struct amdgpu_device *adev)
}
if (adev->flags & AMD_IS_APU)
return false;
if (amdgpu_device_aspm_support_quirk(adev))
return false;
return pcie_aspm_enabled(adev->pdev);
}