Hi, On Wednesday 07 November 2012 12:22:27 Andreas Nagel wrote: > > > My code sets up the ISP pipeline, configures the format on all the > > subdevices pads and the actual video device. Works fine so far. > > Then I passed user pointers (aquired with malloc) to the device > > driver for the capture buffers. Before issuing VIDIOC_STREAMON, I > > enqueue my buffers with VIDIOC_QBUF, which fails with errno = EIO. I > > don't know, why this is happening or where to got from here. > > > >> One possibility could be that mapping the buffer to ISP MMU fails for > >> a reason or another. Do you set the length field in the buffer? > > Yes, the length was set when using userptr. > > >> And am I missing something else? > > > > The formats on the pads at different ends of the links in the pipeline > > must match. In most cases, they have to be exactly the same. > > > > Have you used the media-ctl test program here? > > > > <URL:http://git.ideasonboard.org/media-ctl.git> > > > > media-ctl -p gives you (and us) lots of information that helps figuring > > out what could go wrong here. > > All pads do indeed have the same format. > I ran media-ctl, as you suggested. You can see the topology in the > attached textfile. media-ctl doesn't show pad formats, that's a bit weird. Are you using a recent version ? Does the TVP5146 generate interlaced frames ? -- Regards, Laurent Pinchart -- 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
