iris_queue_deferred_buffers
int iris_queue_deferred_buffers(struct iris_inst *inst, enum iris_buffer_type buf_type);
ret = iris_queue_deferred_buffers(inst, BUF_INPUT);
ret = iris_queue_deferred_buffers(inst, BUF_OUTPUT);
ret = iris_queue_deferred_buffers(inst, BUF_INPUT);
ret = iris_queue_deferred_buffers(inst, BUF_OUTPUT);