MIPI: expose camera statistics
The NXP MIPI controller includes a STATFIFO, which is a stream processing sensor data in parallel with the image FIFO, and this one spits out some basic statistics about the image: sum of each channel and an "auto focus" value on green pixels (presumably suitable for contrast detection).
It seems it might correspond to MEDIA_ENT_F_PROC_VIDEO_ISP in the media controller framework.