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DM365 using VPFE Y Lines when in BT656 Capture Mode

Other Parts Discussed in Thread: TVP5158, TVP5146

Hello Dear TI,

I have a product with DM365 that uses a TVP5158 as its video decoder,
The TVP5158 is configured to output an 8 Bit  BT656 signal and it is connected to the input port of the DM365 C0 - C7
as described in the DM365 VPFE user guide.

I have configured the ISIF to the following configuration
MODESET Register - INPMOD field to YCbCr 8-bit
REC656IF Register - Enable BT656 interface.

According to the VPFE user guide when in this mode the DM365 uses lines C0 - C7 of the capture port
So i would like to use the Y lines of the port as GPIO's,
But when i change the configuration of the PINMUX0 from YIN to GPIO the capture frezzes.

I have also verified this problem with the DM365EVM (TVP5146):
I did the following:

1. Configured the system to COMPOSITE (from the UBoot parametes)
2. run the encodedecode Demo like this:  ./encodedecode -p -I 1 -y 2
3. The demo runs fine and i can see the composite video that i have connected to J13 being outputed to J16
4. at this point i have modified the PINMUX0 Register bit 0-1 (only these bits) to change the pin configuration of YIN7 from YIN7 to GIO103.
5. when i do this the capture stops and the video frezzes.
6.when i change back the pin from GIO103 to YIN7 the video continues to flow.

My question is how can i use the remaining lines of the VPFE capture port (YIN3 - YIN7) when the capture is configured to 8 bit BT656 mode
Without frezzing the flow of video.

Thanks Amir