DM8168 No video capture,status error! [m3vpss ] VIP and VPDMA registers, [m3vpss ] VIP0 : FIQ_STATUS : 0x4810551c = 0x000044C0

Hi All

I develop on dm8168 using our own design board, using dvrrdk2.80,

I use tvp5158 capture four pal videos , i find when at room temperature,it works well ,and the register is 

[m3vpss ] VIP0 : FIQ_STATUS : 0x4810551c = 0x00004400,

but when the  temperature is minus 40 degrees Celsius， sometimes it will stop video capture, it seems no video capture any more,

then i check the register is

[m3vpss ] VIP0 : FIQ_STATUS : 0x4810551c = 0x000044C0,

it seems FIQ conflict,

and i also see the status using dvrrdk 3.50, on evm board

[m3vpss ] VIP0 : FIQ_STATUS : 0x4810551c = 0x00000000,

So which status is right then ?

How can i solve the stop capture video problem, Is there any reason due to this problem?

best regards

xavier