drm/amd/ras: initialize CPER after XGMI reset on init

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The XGMI reset-on-init path can run while the device is still at the
minimal init level, such as during an NPS memory partition switch. In
that flow the normal RAS IP block hw_init is skipped, so unified RAS
is not enabled when the early CPER initialization is attempted, leaving
CPER disabled for the rest of the device's lifetime.

Resume RAS after the XGMI reset-on-init completes. Once the RAS manager
resume succeeds, the RAS resume wrapper performs deferred CPER
initialization, keeping the path a no-op for devices where CPER was
already initialized.

Keep the deferred CPER retry and its debugfs registration together in
the CPER helper. The normal debugfs ring walk skips the CPER ring until
CPER is enabled, so the ring debugfs entry is created either by the
deferred helper when debugfs is already available or by the normal
debugfs walk.

Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Xiang Liu <xiang.liu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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This commit is contained in:

Xiang Liu 2026-07-14 17:51:05 +08:00 • committed by Alex Deucher

parent 516f8fc30a

commit ac4827324c

6 changed files with 35 additions and 4 deletions

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19

drivers/gpu/drm/amd/amdgpu/amdgpu_cper.c

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1

drivers/gpu/drm/amd/amdgpu/amdgpu_cper.h

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2

drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c

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10

drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c

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2

drivers/gpu/drm/amd/amdgpu/amdgpu_ras.h

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5

drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c

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