drm/amdgpu/gfx12: read xccs-per-xcp from RLC_IMU_AID_CONFIG for VFI

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gfx_v12_1_get_xccs_per_xcp() supplies the compute partition layout that
gfx_v12_1_cp_resume() needs on a VF. Once VFI is enabled the VF reaches
registers through RLCG, which cannot access the GFX_IMU registers, so the
GFX_IMU_PARTITION_SWITCH read stops working. Take the same field from
RLC_IMU_AID_CONFIG instead, and read it with a direct MMIO access rather
than RREG32_SOC15, which would route back into the RLCG path.

Signed-off-by: YuBiao Wang <YuBiao.Wang@amd.com>
Reviewed-by: Lijo Lazar <lijo.lazar@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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YuBiao Wang 2026-07-31 13:27:38 +08:00 • committed by Alex Deucher

parent ccf9e35ed6

commit 5e63e435b9

3 changed files with 19 additions and 0 deletions

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13

drivers/gpu/drm/amd/amdgpu/gfx_v12_1.c

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2

drivers/gpu/drm/amd/include/asic_reg/gc/gc_12_1_0_offset.h

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4

drivers/gpu/drm/amd/include/asic_reg/gc/gc_12_1_0_sh_mask.h

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