drm/amdgpu: fix s4 resume

No need to re-init asic if it's already been initialized.
Skip IB tests since kernel processes are frozen in thaw.

Signed-off-by: Flora Cui <Flora.Cui@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index 85991ce..51bfc11 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -1795,15 +1795,20 @@ int amdgpu_resume_kms(struct drm_device *dev, bool resume, bool fbcon)
        }
 
        /* post card */
-       amdgpu_atom_asic_init(adev->mode_info.atom_context);
+       if (!amdgpu_card_posted(adev))
+               amdgpu_atom_asic_init(adev->mode_info.atom_context);
 
        r = amdgpu_resume(adev);
+       if (r)
+               DRM_ERROR("amdgpu_resume failed (%d).\n", r);
 
        amdgpu_fence_driver_resume(adev);
 
-       r = amdgpu_ib_ring_tests(adev);
-       if (r)
-               DRM_ERROR("ib ring test failed (%d).\n", r);
+       if (resume) {
+               r = amdgpu_ib_ring_tests(adev);
+               if (r)
+                       DRM_ERROR("ib ring test failed (%d).\n", r);
+       }
 
        r = amdgpu_late_init(adev);
        if (r)