drm/amdgpu/gfxhub: Enable retry fault interrupts in L2_PROTECTION_FAULT_CNTL2

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Enable retry fault interrupts when initializing
the GFXHUB system aperture registers.
Needs to be done for each GFXHUB version, because
none of them actually enabled this interrupt.

This bit gates all retry fault functionality on Navi GPUs.
According to a mailing list conversation with AMD engineers,
this register field should have been initialized to 1
according to hardware documentation. But it has been confirmed
that it is in fact initialized to 0 by default.
I have personally confirmed on both Navi 31 and Navi 48
that the GPU does NOT send any retry fault interrupts
without enabling this bit.

Initially I wanted to program this field according
to the gmc.noretry flag in the previous versions
of this patch, but I was asked to just program it
always to 1 instead.

Signed-off-by: Timur Kristóf <timur.kristof@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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This commit is contained in:

Timur Kristóf 2026-08-28 13:41:04 +02:00 • committed by Alex Deucher

parent 169dfc920c

commit f7275d391e

8 changed files with 51 additions and 14 deletions

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9

drivers/gpu/drm/amd/amdgpu/gfxhub_v11_5_0.c

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drivers/gpu/drm/amd/amdgpu/gfxhub_v12_0.c

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drivers/gpu/drm/amd/amdgpu/gfxhub_v1_0.c

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drivers/gpu/drm/amd/amdgpu/gfxhub_v1_2.c

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drivers/gpu/drm/amd/amdgpu/gfxhub_v2_0.c

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drivers/gpu/drm/amd/amdgpu/gfxhub_v2_1.c

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drivers/gpu/drm/amd/amdgpu/gfxhub_v3_0.c

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drivers/gpu/drm/amd/amdgpu/gfxhub_v3_0_3.c

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