SDMA_WRITE_SUB_OPCODE_LINEAR
amdgpu_ring_write(ring, SDMA_PACKET(SDMA_OPCODE_WRITE, SDMA_WRITE_SUB_OPCODE_LINEAR, 0));
SDMA_WRITE_SUB_OPCODE_LINEAR, 0);
SDMA_WRITE_SUB_OPCODE_LINEAR, 0);
SDMA_WRITE_SUB_OPCODE_LINEAR, 0);
radeon_ring_write(ring, SDMA_PACKET(SDMA_OPCODE_WRITE, SDMA_WRITE_SUB_OPCODE_LINEAR, 0));
radeon_ring_write(ring, SDMA_PACKET(SDMA_OPCODE_WRITE, SDMA_WRITE_SUB_OPCODE_LINEAR, 0));
ib.ptr[0] = SDMA_PACKET(SDMA_OPCODE_WRITE, SDMA_WRITE_SUB_OPCODE_LINEAR, 0);
SDMA_WRITE_SUB_OPCODE_LINEAR, 0);
SDMA_WRITE_SUB_OPCODE_LINEAR, 0);