I use the VASP package for all type of DFT calculations. For a particular system, I have to calculate Raman spectra. I'm familiar with Phonopy too. But I do not know the exact procedure to generate Raman spectra.
If you know how to use VASP and Phonopy to generate dynamical matrices, then you can use the utility program Phonopy-Spectroscopy to calculate Raman spectra. Here is the link to this program: