Integrate camera interface of OMAP3530 in Angstrom Linux

Hello,

I am using an embedded module called TAO-3530 from Technexion, which has an OMAP3530 processor.
This processor has a camera interface, which is part of the ISP submodule. For an ongoing project I want to capture a video signal from this interface. After several days of excessive research I still don't know, how to access it.
I configured the Angstrom kernel (2.6.32), so that the driver for OMAP 3 camera controller (and all other OMAP 3 related things) is integrated, but I don't see any new device nodes in the filesystem.

I also found some rumors, that the Media Controller Framework or driver provides the device node /dev/media0, but I was not able to install it.

I use OpenEmbedded, but I don't have a recipe for Media Controller. On the Angstrom website ( http://www.angstrom-distribution.org/repo/ ) there's actually a package called "media-ctl", but due to the missing recipe, i can't install it. Can't say, I am an expert in OE.

Can you help me point out, what's necessary to make the camera interface accessible?

Hi Andreas,

Quoted 11 lines · On Thursday 06 September 2012 20:00:04 Andreas Nagel wrote:

Hello,

I am using an embedded module called TAO-3530 from Technexion, which has an OMAP3530 processor.
This processor has a camera interface, which is part of the ISP submodule. For an ongoing project I want to capture a video signal from this interface. After several days of excessive research I still don't know, how to access it.
I configured the Angstrom kernel (2.6.32), so that the driver for OMAP 3 camera controller (and all other OMAP 3 related things) is integrated, but I don't see any new device nodes in the filesystem.

You should upgrade to a much more recent kernel, as the driver for the OMAP3 ISP included in the Angstrom 2.6.32 kernel is just bad legacy code that should be burried in a very deep cave.

Quoted 2 lines

I also found some rumors, that the Media Controller Framework or driver provides the device node /dev/media0, but I was not able to install it.

You will need to upgrade your kernel for that. I'd advise going for the latest mainline kernel.

Quoted 7 lines

I use OpenEmbedded, but I don't have a recipe for Media Controller. On the Angstrom website ( http://www.angstrom-distribution.org/repo/ ) there's actually a package called "media-ctl", but due to the missing recipe, i can't install it. Can't say, I am an expert in OE.

Can you help me point out, what's necessary to make the camera interface accessible?

Hi Laurent,

thanks for your reply.

Using a current mainline kernel is a little problematic. Recently I compiled the 2.6.39 and it wasn't able to boot at all. The reason for this are probably the chips, that are built on the CPU module. Usually, a working kernel for this module was undergoing some modifications by Technexion because of these chips.

Currently, Technexion only offers the 2.6.32. and 2.6.37 kernel. The latter one makes a new device node /dev/media0 available (after activating some 'experimental' marked options in the kernel config), but I wasn't able to capture any signal.

I'm going to try the latest mainline kernel, but I doubt it will work.