From: Hawking Zhang <Hawking.Zhang@amd.com>
Date: Sat, 17 Jan 2026 11:47:09 +0000 (+0800)
Subject: drm/amdgpu/gmc12: Update gmc aperture base for A + A
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=5aff5c6831da26425255461c7a227d6e165fde02;p=thirdparty%2Flinux.git

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 <Hawking.Zhang@amd.com>
Reviewed-by: Le Ma <le.ma@amd.com>
Reviewed-by: Feifei Xu <Feifei.Xu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---

diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v12_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v12_0.c
index 2bbd63ffe7105..ac0536be0f90c 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