drm/radeon/kms: allocate vram scratch page on 6xx+
The vram scratch was originally only used on some 7xx asics
to work around a hw bug. Allocate the scratch page on all 6xx+
radeons and set the MC_VM_SYSTEM_APERTURE_DEFAULT_ADDR to point
to it. We shouldn't ever hit it since we limit the system
aperture to vram or vram and AGP, but better safe than sorry.
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/radeon/ni.c b/drivers/gpu/drm/radeon/ni.c
index 556b7bc..56afaff 100644
--- a/drivers/gpu/drm/radeon/ni.c
+++ b/drivers/gpu/drm/radeon/ni.c
@@ -1361,6 +1361,10 @@
return r;
}
+ r = r600_vram_scratch_init(rdev);
+ if (r)
+ return r;
+
evergreen_mc_program(rdev);
r = cayman_pcie_gart_enable(rdev);
if (r)
@@ -1556,6 +1560,7 @@
radeon_ib_pool_fini(rdev);
radeon_irq_kms_fini(rdev);
cayman_pcie_gart_fini(rdev);
+ r600_vram_scratch_fini(rdev);
radeon_gem_fini(rdev);
radeon_fence_driver_fini(rdev);
radeon_bo_fini(rdev);