drm/amdgpu: reduce early full GPU access during SR-IOV init

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Allow early FB reads to fall back to BAR0 when the VRAM aperture is not ready.
This lets SR-IOV VFs consume host-provided init data before requesting full GPU access.

For ASICs that support request_init_data,
defer full GPU access until after non-GPU early init to shorten the full-access window.

Legacy ASICs(before NV12) do not send request_init_data;
the host dumps init data only during full GPU access,
so keep the original early full-access request path for them.

Signed-off-by: chong li <chongli2@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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chong li 2026-07-15 18:41:15 +08:00 • committed by Alex Deucher

parent 149f894a2a

commit cba4928cdf

2 changed files with 88 additions and 7 deletions

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88

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

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7

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

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