I am using ADV7604 for DVI and VGA inputs. I wanted to switch between the two. When I switch from VGA to DVI, it works fine. However, when I switch from DVI to VGA I only get a black screen. (Not the default blue colour).
I noticed that the DVI script has the following two lines which power down the ADCs
4C 00 FF ; Power Down ADC's and there associated clocks
4C 01 FE ; Power down ref buffer/bandgap/clamps/sync strippers/input mux/output buffer
However, I could not find the register 0x01 in 0x4C (AFE map) in any documentation.
So two questions:
1) How do I switch from DVI source to VGA source.
2) What about the register 0x01 in AFE map?