How can I save on pin count or what is the absolute minimum pin connection required to make the ADV202/212 work?

Minimum pin requirements as listed will allow 16-bit Normal Host Mode for configuration and Host Interface Pixel Interface mode [HIPI mode] for data transfer of uncompessed and compressed data using both DMA channels.

MCLK
RESET/
HDATA[15:0]
ADDR[3:0]
CS/
WE/
RD/
ACK/
DREQ0/ and DREQ1/
DACK0/ and DACK1/