The configuration of VPFE

Mingming Chen

Other Parts Discussed in Thread: TVP5146

Now I am developping a driver for MT9D131, I use DM365_EVM. Now the problem is the mt9d131 can only output YUV4:2:2 and RGB 8bits, when I connet the camera to image interface, there is not any data output from VPFE, I think the vpfe is originally receive SRGB10 bits data, how can I configure the VPFE for YUV4:4:2 data(I have already read the document of VPFE, I think it's possible to do this). Thank you very much.

over 14 years ago

0 Nagabhushana over 14 years ago

TI__Expert 4685 points

You should understand vpfe_capture.c and make appropriate changes wherever sensor is called.

0 Mingming Chen over 14 years ago in reply to Nagabhushana

Intellectual 310 points

Hello, I am trying to use MT9D131 for board DM365 EVM, but the output of this sensor is SRGB 8bit or YUV 4:4:2 or BT.565,but the VPFE is originally configured with a sensor which can output 10 bit raw data. Has anyone try to config the VPFE to receive the image with the format of SRGB 8 bit or YUV 4:2:2 or Bt565, thank you very much

0 Anshuman Saxena over 14 years ago in reply to Mingming Chen

TI__Mastermind 19985 points

Hi,

PSP package of DM36x has support for parallel sensors which give out bayer format data. I believe that is what you are referring to in your question.

But along with it, we have support for TVP514x video decoder, which is a BT656 output device. It outputs YUV422 data with embedded sync. You can refer to that driver and implement the MT9D131 sensor driver. I believe other members in this E2E community have also implemented this driver referring to the TVP514x driver.

Regards,

Anshuman

PS: Please mark this post as verified, if you think it has answered your question. Thanks.

0 Mingming Chen over 14 years ago in reply to Anshuman Saxena

Intellectual 310 points

It outputs YUV422 data with embedded sync.

It refers to what? DM365 or TVP5146

0 Nagabhushana over 14 years ago in reply to Mingming Chen

TI__Expert 4685 points

Looks like sensor(which has decoder as well) you are can output NTSC/PAL. In vpfe_capture.c, you see calls specific to tvp514x which is a SD decoder(supports NTSC/PAL). You should be able to refer to that code and make appropriate changes in places where sensor is called.

Processors

Processors forum

The configuration of VPFE