Hello there Laurent, >We could, but I don't think it will make any difference in practice as >the maximum pixel clock frequency supported by the SoC is 80MHz (per >LVDS channel). That would result in a 560MHz frequency returned by this >function, well below the 31 bits limit. Thanks for your explanation. I have a couple of suggestions for possible improvements: 1. Your explanatory text in a comment nearby. This helps all readers of the code. 2. Might the frequency go up to 300 MHz anytime soon ? The code will stop working then. In this case, I would suggest to put in a run time sanity check to make sure no 31 bit overflow. Just a couple of ideas for the code. Regards David Binderman