Custom daughter card and troubles with TVP7002 emulation

Pavel Goryunov

Other Parts Discussed in Thread: TVP7002

Hello, everyone.

We developed some kind of custom daughter card (cdc). It streams video via standard board to board connector(cdc->connector(b)->connector(a)->vin0 etc.)

Default software (v4l2 capture driver and saLoopBack) uses tvp7002.ko do detect video signal parameters and fill respective fields in v4l2_subdev structure, am i right?

So, our cdc by default outputs transformed video signal(like tvp7002) but has no control pins.

Questions are: how to avoid all default calls to tvp7002 or how to emulate i2c work of tvp7002?

Best regards.

Paul.

over 12 years ago

0 Pavel Goryunov over 12 years ago

Intellectual 435 points

By the way, we are using DM8168EVM from spectrum digital and EZSDK 5.04.

0 Pavel Goryunov over 12 years ago in reply to Pavel Goryunov

Intellectual 435 points

Moreover, i found a topic with similar question http://e2e.ti.com/support/dsp/davinci_digital_media_processors/f/716/t/160009.aspx?pi239031349=1 but attached patches are not actual for EZSDK 5.04.

Any help?

0 HardikShah over 12 years ago in reply to Pavel Goryunov

TI__Mastermind 20245 points

Hi,

I am not getting your answer correctly. But you can comment out all calls to sub-device or you can add your FPGA or decoder as sub-device drivers and control it using same way as TVP7002. Here is the guide on how to add new decoders.

http://processors.wiki.ti.com/index.php/DM81xx_AM38xx_Adding_External_Decoders_to_V4L2_Capture_Driver

Regards,

Hardik Shah

0 Pavel Goryunov over 12 years ago in reply to HardikShah

Intellectual 435 points

Hi, Hardik.

What about changes in ti81xx_fb.c? I dont have such file. And one of the patches regards to this file where "vps_ti814x_select_video_decoder;" "vps_ti814x_set_tvp7002_filter;" are commented.

I found similar calls in file "ti81xx_vpss.c" but after changing it and making "#sudo make linux" no modules are rebuilding.

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Custom daughter card and troubles with TVP7002 emulation