AM5728: how can find/write kernel driver for GS2971A (SDI receiver chip) to interface it to AM5728 EVM (TMDSEVM57xx)

Ali Ansari

Part Number: AM5728

Hello

I designed a board with GS2971A to receive video from SDI port and send it to AM5728 VIN3A port instead of Camera module.

I want GS2971A work at 10 bit mode. I connected pins D12~D19 of GS2971 to D0~D7 of connector P9 on LCD board instead of Camera module.

the signals HS, VS, PCLK, DE and FLD of GS2971A is connected to same net pins of P9 connector.

the SPI signals (SCLK, SDIN, SDOUT, CSn) of GS2971A is sequentially connected to pins 57,58,59,60 of P9 connector.

now, I want to make a kernel driver for this chip in linux SDK (version 06.00.00.07) to be detected as video device and can capture video.

how can I do this? is there a kernel driver for this chip?

Best Regards,

Ali

over 5 years ago

0 Nikhil Devshatwar over 5 years ago

TI__Genius 9905 points

Hi,

It is best to check with the chip manufacturer about the right driver for the video chip

Regards,

Nikhil D

0 Ali Ansari over 5 years ago in reply to Nikhil Devshatwar

Expert 1260 points

Hi Nikhil

thanks for reply.

can I use the Ov10635 dts as predefined module and then initiaize the GS2971A in run time for generating BT.656 8 bit signals same as the OV10635?

BR,

Ali

0 Nikhil Devshatwar over 5 years ago in reply to Ali Ansari

TI__Genius 9905 points

Hi,

DO not try to use other driver. Because the register map for the two cameras will be different.

Also, OV1063 is not using BT656, so you cannot copy the DTS file as well.

Refer to this app note for more details:

https://www.ti.com/lit/an/spracd8/spracd8.pdf

Regards,

Nikhil D

0 Ali Ansari over 5 years ago in reply to Nikhil Devshatwar

Expert 1260 points

Hi Nikhil

thanks for reply.

I will see the document you mentioned and try to write (or find) exact driver for GS2971A.

BR,

Ali

0 Ali Ansari over 5 years ago in reply to Nikhil Devshatwar

Expert 1260 points

Hi again Nikhil

is there a document that describes minimum needed functions to handshake with vip driver ? I want to write a driver myself.

suppose that I want to set the chip in one special mode (such as BT.656 8 bit SDR). what are the functions that is necessary and needed for setting the chip and report the mode to vip driver?

BR,

Ali

0 Nikhil Devshatwar over 5 years ago in reply to Ali Ansari

TI__Genius 9905 points

Hi,

You should implement all the functions that ov1063x has implemented.

This is not a big list and most of the functions are trivial. Wherever not applicable, you can return 0

Regards,

Nikhil D

0 Ali Ansari over 5 years ago in reply to Nikhil Devshatwar

Expert 1260 points

thanks for reply.

OK, I'll try to do that.

BR,

Ali

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AM5728: how can find/write kernel driver for GS2971A (SDI receiver chip) to interface it to AM5728 EVM (TMDSEVM57xx)