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c21487ce5f
_PR3 detection was changed in commit134b8c5d86("drm/amd: Fix detection of _PR3 on the PCIe root port") to look at the root port of the topology containing the GPU. This however was too far because it ignored whether or not all the intermediary bridges could power off the device. The original design in commitb10c1c5b3a("drm/amdgpu: add check for ACPI power resources") was too narrow because it matched the switches internal to the GPU. Use the goldilocks approach and look for the first bridge outside of the GPU and check for _PR3 on that device. Fixes:134b8c5d86("drm/amd: Fix detection of _PR3 on the PCIe root port") Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Mario Limonciello <mario.limonciello@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>