amdgpu_vcn_enc_ring_test_ib
r = amdgpu_vcn_enc_ring_test_ib(ring, timeout);
int amdgpu_vcn_enc_ring_test_ib(struct amdgpu_ring *ring, long timeout);
.test_ib = amdgpu_vcn_enc_ring_test_ib,
.test_ib = amdgpu_vcn_enc_ring_test_ib,
.test_ib = amdgpu_vcn_enc_ring_test_ib,
.test_ib = amdgpu_vcn_enc_ring_test_ib,