From 5aff5c6831da26425255461c7a227d6e165fde02 Mon Sep 17 00:00:00 2001 From: Hawking Zhang Date: Sat, 17 Jan 2026 19:47:09 +0800 Subject: [PATCH] drm/amdgpu/gmc12: Update gmc aperture base for A + A Query mmhub MC_VM_FB_OFFSET, XGMI_LFB_CNTL|SIZE registers to calculate gmc apeture base address for A + A configuration Signed-off-by: Hawking Zhang Reviewed-by: Le Ma Reviewed-by: Feifei Xu Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/amdgpu/gmc_v12_0.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v12_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v12_0.c index 2bbd63ffe710..ac0536be0f90 100644 --- a/drivers/gpu/drm/amd/amdgpu/gmc_v12_0.c +++ b/drivers/gpu/drm/amd/amdgpu/gmc_v12_0.c @@ -736,8 +736,12 @@ static int gmc_v12_0_mc_init(struct amdgpu_device *adev) adev->gmc.aper_size = pci_resource_len(adev->pdev, 0); #ifdef CONFIG_X86_64 - if ((adev->flags & AMD_IS_APU) && !amdgpu_passthrough(adev)) { - adev->gmc.aper_base = adev->mmhub.funcs->get_mc_fb_offset(adev); + if (((adev->flags & AMD_IS_APU) && !amdgpu_passthrough(adev)) || + (adev->gmc.xgmi.connected_to_cpu)) { + adev->gmc.aper_base = + adev->mmhub.funcs->get_mc_fb_offset(adev) + + adev->gmc.xgmi.physical_node_id * + adev->gmc.xgmi.node_segment_size; adev->gmc.aper_size = adev->gmc.real_vram_size; } #endif