drm/radeon: Fix VFCT bus number matching with soft filter

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On systems where PCI bus renumbering occurs (e.g. pci=realloc,
resource conflicts), the runtime bus number may differ from the
BIOS POST bus number recorded in the VFCT table. This causes
radeon_acpi_vfct_bios() to fail finding the VBIOS even though
the correct device entry exists.

Introduce radeon_acpi_vfct_match() which treats the bus number
as a soft filter: vendor/device/function identity is the hard
requirement, while exact bus match is the preferred path. When
bus numbers disagree but device identity matches, accept the
VFCT entry and log a dev_notice for diagnostics. This mirrors the
equivalent amdgpu change.

Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Link: https://patch.msgid.link/20260708193518.702584-5-mario.limonciello@amd.com
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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Mario Limonciello 2026-07-08 14:35:17 -05:00 • committed by Alex Deucher

parent 24071402a4

commit 4059e2f02c

1 changed files with 40 additions and 5 deletions

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drivers/gpu/drm/radeon/radeon_bios.c

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