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drm/amd: Refactor amdgpu_aspm to be evaluated per device

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Evaluating `pcie_aspm_enabled` as part of driver probe has the implication
that if one PCIe bridge with an AMD GPU connected doesn't support ASPM
then none of them do.  This is an invalid assumption as the PCIe core will
configure ASPM for individual PCIe bridges.

Create a new helper function that can be called by individual dGPUs to
react to the `amdgpu_aspm` module parameter without having negative results
for other dGPUs on the PCIe bus.

Suggested-by: Lijo Lazar <lijo.lazar@amd.com>
Reviewed-by: Lijo Lazar <lijo.lazar@amd.com>
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Mario Limonciello
2022-02-16 23:19:58 -06:00
committed by Alex Deucher
parent f0d5409895
commit 0ab5d711ec
9 changed files with 32 additions and 9 deletions
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2
drivers/gpu/drm/amd/amdgpu/si.c
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@@ -2453,7 +2453,7 @@ static void si_program_aspm(struct amdgpu_device *adev)
bool disable_l0s = false, disable_l1 = false, disable_plloff_in_l1 = false;
bool disable_clkreq = false;
if (amdgpu_aspm == 0)
if (!amdgpu_device_should_use_aspm(adev))
return;
if (adev->flags & AMD_IS_APU)