Hi, I'm writing a video capture device and have a doubt about how to correctly print to screen. First, I suppose I should follow the rule "don't print unless there is something surprising to say", right? Second, I've found I need to print in a very verbose manner at developing stage so I should implement a debug param. I will probably adopt videobuf2 way (like many others) of defining a macro (dprintk or something). However, reading the source I've found there isn't a unified way to do this: some use printk (as defined macros), others use v4l_xxx, others use dev_xxx. I've adopted the latter, because I thought there could be many devices plugged, and using dev_xxx with the usb_device->dev helps seeing which is tracing. I'm not really sure if it is ok so I would love to hear some opinions about this sensible issue. Thanks!