Em Thu, 10 Sep 2009 16:27:20 -0400 Devin Heitmueller <dheitmueller@xxxxxxxxxxxxxx> escreveu: > On Thu, Sep 10, 2009 at 4:20 PM, Mauro Carvalho > Chehab<mchehab@xxxxxxxxxxxxx> wrote: > > In fact, this can already be done by using the sysfs interface. the current > > version of v4l2-sysfs-path.c already enumerates the associated nodes to > > a /dev/video device, by just navigating at the already existing device > > description nodes at sysfs. I hadn't tried yet, but I bet that a similar kind > > of topology can be obtained from a dvb device (probably, we need to do some > > adjustments). > > For the audio case, I did some digging into this a bit and It's worth > noting that this behavior varies by driver (at least on USB). In some > cases, the parent points to the USB device, in other cases it points > to the USB interface. My original thought was to pick one or the > other and make the various drivers consistent, but even that is a > challenge since in some cases the audio device was provided by > snd-usb-audio (which has no knowledge of the v4l subsystem). We may consider adding a quick at snd-usb-audio for em28xx devices, in order to create the proper sysfs nodes. Cheers, Mauro -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
