[PATCH 02/11] drm/amdgpu: put gtt at 0 in the internal address space

Alex Deucher alexdeucher at gmail.com
Fri Feb 17 20:38:08 UTC 2017


There still seem to be some blocks that make accesses
in the lower part of the address space.  This works around
this.

Reviewed-by: Christian K├Ânig <christian.koenig at amd.com>
Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index ee8c4a0..c0679d3 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -603,7 +603,7 @@ void amdgpu_gtt_location(struct amdgpu_device *adev, struct amdgpu_mc *mc)
 			dev_warn(adev->dev, "limiting GTT\n");
 			mc->gtt_size = size_bf;
 		}
-		mc->gtt_start = (mc->vram_start & ~mc->gtt_base_align) - mc->gtt_size;
+		mc->gtt_start = 0;
 	} else {
 		if (mc->gtt_size > size_af) {
 			dev_warn(adev->dev, "limiting GTT\n");
-- 
2.5.5



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