Hi Sergio, On Thursday 26 August 2010 16:54:37 Aguirre, Sergio wrote: > On Thursday, August 26, 2010 2:31 AM Laurent Pinchart wrote: > > On Wednesday 25 August 2010 22:15:36 Aguirre, Sergio wrote: > > > > > > I see that usually a sensor is powered up on attempting a > > > VIDIOC_STREAMON at the capture endpoint of the pipeline, in which the > > > sensor is linked. > > > > > > Now, what I don't understand quite well is, the Lens driver is a > > > separate subdevice, BUT it's obviously not linked to the sensor, nor the > > > pipeline. > > > > > > How would the lens driver know when to power up? > > > > At the moment a userspace application needs to keep the lens subdev open > > to power-up the lens controller. > > I see... So in that case, does it make sense to consider it as a media > entity? > > I mean, there's no link, nor pad operations involved, so it doesn't really > add any value... > > What do you think? Even if not part of the image pipeline, the lens controller is still part of the media device. I think it makes sense to expose it as an entity and a V4L2 subdevice. -- 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
