VGA supports a DDC data transfer mechanism similar to the HDMI DDC mechanism.
Does ADV7604 support VGA DDC?
Also, can the video details be read back somewhere in the ADV7604?
The ADV7604 does not support VGA DDC. Subsequent parts to the ADV7604 (e.g. ADV7844) did support it but, in a design using ADV7604, the VGA DDC must be handled externally.
The video parameters can be read back from the STDI registers detailed comprehensively in the hardware manual.
Retrieving data ...