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drm/amdgpu: fix AGP location with VRAM at 0x0 

That also simplifies handling quite a bit.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Junwei Zhang <Jerry.Zhang@amd.com>
Reviewed-by: Huang Rui <ray.huang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Christian König 2018-10-04 10:27:48 +02:00 committed by Alex Deucher
parent bdbb4d6e96
commit 2ccecaf661
1 changed files with 2 additions and 5 deletions
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7
drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c
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@ -200,16 +200,13 @@ void amdgpu_gmc_agp_location(struct amdgpu_device *adev, struct amdgpu_gmc *mc)
}
if (size_bf > size_af) {
mc->agp_start = mc->fb_start > mc->gart_start ?
mc->gart_end + 1 : 0;
mc->agp_start = (mc->fb_start - size_bf) & sixteen_gb_mask;
mc->agp_size = size_bf;
} else {
mc->agp_start = (mc->fb_start > mc->gart_start ?
mc->fb_end : mc->gart_end) + 1,
mc->agp_start = ALIGN(mc->fb_end + 1, sixteen_gb);
mc->agp_size = size_af;
}
mc->agp_start = ALIGN(mc->agp_start, sixteen_gb);
mc->agp_end = mc->agp_start + mc->agp_size - 1;
dev_info(adev->dev, "AGP: %lluM 0x%016llX - 0x%016llX\n",
mc->agp_size >> 20, mc->agp_start, mc->agp_end);