Hi Jiri, > > I like this idea, but it might not solve the case where you have parts > > of the driver in kernel space and other parts in user space. For example > > the control of a LCD display on the keyboard. However in most cases > > registering drivers for a report id should be enough. > > the specialized driver could hook on all reports of the device (as > discussed a few mails ago in this thread) and have the possibility to do > three different things with the obtained report: > > - pass it back to generic hid driver for "standard" processing > - process the report, and issue input_event() itself > - pass it to hidraw and let userspace to consume it > > This is going to work for the scenario you have described, right?
it will work. However I am not sure that is the best design. We need to make one round-trip into an extra driver. We might gonna need these kind of driver that hook in-between and does nasty things anyway, because of broken HID devices. The cleanest solution without a layer violation is that you can register a driver for a specific VID/PID and then report id (one or more). All reports with ids that we don't have a special driver for are handled by the default HID->input driver or handed over to hidraw if not parseable. The reports for ids with a special driver are handed over to the driver. And for hidraw it would be nice if we can apply filters for specific report ids to keep the round-trips and overhead at a minimum. Regards Marcel ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys-and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
