DSI lane swap on STM32MP157

[rtie]

Hi,

is it possible to swap the DSI lanes so that lane 0 becomes lane 1 and the other way around? This would simplify routing on our PCB. I've found there are configuration bits in the DSI_WPCR0 register for custom lane configuration (SWDL0 and SWDL1), but as far as I understood, these can only swap the pin order within a lane. Have I overlooked something or is the STM32MP157 not capable of swapping lanes?

Best regards,

Robert

[Olivier GALLIEN · Accepted solution]

Hi @rtie 

I confirm your analyse. 

DSI clock or a data lane uses 2 physical pins (+ and -) and bits in DSI_WPCR0 registers can be used to "swap" these + and - pins. Unfortunately, it is not possibe to swap data lane 0 pins with data lane 1 pins.

Olivier 

[rtie]

OK, thank you very much for the confirmation!

Robert