Testing out libcamera Software-ISP on RPi3/4
Introduction 
 In this post, we are going to test libcamera software-isp on RaspberryPi 3/4
hardware. The post is intended for the curious, to test out the SoftISP and
perhaps hack on it, on a relatively easy-to-grab hardware platform. 
 The Software-ISP in libcamera 
 SoftISP in itself, is quite an independent project in libcamera itself.
Currently, the ISP module merged…