Re: [omap3camera] How does a lens subdevice get powered up?

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Hi Sergio,

On Wednesday 25 August 2010 22:15:36 Aguirre, Sergio wrote:
> Hi Laurent,
> 
> 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.

-- 
Regards,

Laurent Pinchart
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