Re: Getting started with OMAP3 ISP

[Gary Thomas <gary@mlbassoc.com>]

On 2011-08-30 10:36, Enrico wrote:
> On Tue, Aug 30, 2011 at 6:23 PM, Gary Thomas<gary@mlbassoc.com>  wrote:
>> Thanks, I'll give it a look.
>>
>> Your note says that /dev/video* is properly registered.  Does this
>> mean that udev created them for you on boot as well?  If so, what
>> version of udev are you using?  What's your root file system setup?
>> n.b. I'm using an OpenEmbedded variant, Poky
>
> They are not created on boot but when i modprobe omap3-isp (and
> tvp5150 gets automatically loaded).
>
> Udev is version 173 and i'm using Angstrom, an OpenEmbedded (core) variant too.
>
> Anyway when developing the patch it happened to me too that i had
> those subdev open errors, but if i remember correctly only for tvp5150
> so it was something wrong in my code.
>
> And if i continue to remember correctly it was because you had to set
> the V4L2_SUBDEV_FL_HAS_DEVNODE after calling v4l2_i2c_subdev_init.
> Seems nonsense but this is what i remember, actually this is what the
> mt9v032 driver does.

Yes, without that setting, the tvp device doesn't register a proper v4l_subdev node.

I'm getting the devices created, i.e. they exist in /sys, but just
not in /dev.  I'll see if I can run a new udev - maybe that will fix it.

Thanks

-- 
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Gary Thomas                 |  Consulting for the
MLB Associates              |    Embedded world
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