How can i hook a video source to the OMAP3530 camera interface?

Hannes Klas

Other Parts Discussed in Thread: OMAP3530

Hey there,

I have a video source (custom FPGA) that directly generates a BT656 or a BT601 stream for me. How can I access it via the OMAP3530 Camera interface?

I tried following http://processors.wiki.ti.com/index.php/UserGuideOmap35xCaptureDriver_PSP_03.00.00.05, but there is only a description for using a v4l2 subdev driver for a video decoder chip, which i don't need. Can i skip this part somehow so that the camera driver just transfers the given frames without trying to configure the chip?

pclk, h, v, d[0-8] are transferred from the FPGA, currently via 720x480@60 with 26.9MHz pclk.

Regards

over 13 years ago

0 John Kelly over 13 years ago

Prodigy 140 points

I would think that you'd need to have a v4l2_int_master interface that configures the ISP for you (like in board-omap3evm-camera.c), and then a v4l2_slave_interface that handles the interface with your FPGA.

0 Punya Prakash over 13 years ago in reply to John Kelly

TI__Intellectual 1665 points

I would suggest that you start with the 2.6.37 kernel with support for media controller framework. Please refer http://processors.wiki.ti.com/index.php/UserGuideOmap35xCaptureDriver_PSP_04.02.00.07 for additional details.

0 James.Ang over 13 years ago in reply to Punya Prakash

Prodigy 165 points

Hi,

Punya Prakash said:

I would suggest that you start with the 2.6.37 kernel with support for media controller framework. Please refer http://processors.wiki.ti.com/index.php/UserGuideOmap35xCaptureDriver_PSP_04.02.00.07 for additional details.

Can you point out where can I obtain the User applications mentioned at the end of the page?

Thank you.

James

0 Hannes Klas over 13 years ago in reply to Punya Prakash

Prodigy 20 points

I can't use kernel 2.6.37, because we are pretty far in our project and use kernel 2.6.32. Upgrading would need a lot of time to verify the drivers again.

So that basically means that i have to write the v4l2 interface, right? I'm going to try that once i have a bit more time left over.

0 Vaibhav Hiremath over 13 years ago in reply to Hannes Klas

TI__Expert 8180 points

Hannes,

Another option I can suggest you here is, Write a dummy driver, which will implement empty functions. Refer to existing tvp514x driver for API's you need to export and make sure that you return correct return values from them.

With this, you don't need any changes in ISP, since ISP already support BT656 interface.

Thanks,

Vaibhav

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How can i hook a video source to the OMAP3530 camera interface?