[Gta04-owner] Camera

[Dr. H. Nikolaus Schaller]

Am 24.07.2012 um 16:46 schrieb Denis 'GNUtoo' Carikli:

> On Tue, 2012-07-24 at 15:36 +0200, Dr. H. Nikolaus Schaller wrote:
>> Am 24.07.2012 um 15:14 schrieb Denis 'GNUtoo' Carikli:
>> 
>>> CONFIG_MEDIA_CONTROLLER
>> 
>> Hm.
>> Does not exist (neither enabled/nor disabled).
> Then I guess it lacks dependencies to be enabled/disabled
> because in the GTA04(3.4) kernel I have it's available with 
> make ARCH=arm xconfig:
> Media Controller API (EXPERIMENTAL) (MEDIA_CONTROLLER) is in 
> Multimedia support (MEDIA_SUPPORT)

Ah, I see.

I am using the 2.6.32 kernel and CONFIG_MEDIA_CONTROLLER
may have been introduced in between.

Well, the 2.6.32 code originally comes from the BeagleBoard XM which
has a camera interface and a working camera. So it *should* work...

> 
>> 
>> Since I get a random noise image (snow) and correct sync,
>> I suspect it is more some bad camera setting. I.e. wrong ADC
>> gain or internal signal mux.
> it could also be the path that isn't setup correctly...

only the data path.

> Although it appeared green or something like that in n900's case if I
> remember well.

Yes, if the sync frequency is wrong, it reports a select() timeout
and the image frame is filled with green.

But with correct sync prescaler settings this works (there is still
some shift in the hsync/porch, i.e. a green stripe is on the left
or right (don't remember).

> I should retry to see what happens with the n900...
> I'm not sure about the snow....

What I also had tried is to enable the test pattern in the
camera (there is a bit which is supposed to control it), but
the snow remained.

So it could also be something completely different (e.g. bad video
encoding format or clock edge).

> 
> Also I'm very interested in making the camera work,I like gstreamer a
> lot for instance, but I know the camera at userspace level only
> unfortunately, also I think I'd better spend time on improving SHR or
> Replicant...

Well, there is even an opportunity to get a little payment for making
the camera driver work:

http://lists.goldelico.com/pipermail/developer-network/2012-July/000000.html

So if anyone wants to jump in or knows someone who is experienced
with these OV camera chips...

> 
> Although my SHR builds with autorev enabled it's almost usable for
> calls...(I've to wait for Simon Busch(morphis) to fix a bug with the
> 'Media' software sound control in the scenarios handling...).
> It also needs to be tested more(I don't call people a lot nor receive
> lots of calls...).
> Now the stereoout and gsmhandset scenarios are complete, the forwarder
> also works fine(100% CPU usage fixed, silent call after ringing fixed,it
> needs more testing though).

That is also good news! Thanks for this note.

I think we are starting to gain some speed again...

Nikolaus