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DS90UB954-Q1: CSI-2 interface no output

Part Number: DS90UB954-Q1

Hi Team,

Customer find DS90UB954 CSI-2 no output sometimes, they check status and find TX_PORT_PASS =0 but RX LOCK&PASS_STS=1. please refer below register between normal & abnormal,

Normal condition

0x4D[1:0] =>PORT_PASS & LOCK_STS =1

0x35[0]  => TX_PORT_PASS =1

 

abnormal condition

0x4D[1:0] =>PORT_PASS & LOCK_STS =1

0x35[0]  => TX_PORT_PASS =0

 

Customer would like to know in what condition will cause TX_PORT_PASS =0 and TX port no output?

Thanks

 

Eddie