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DS90UH928Q-Q1: HDCP operation with DS90UH925-Q1

Part Number: DS90UH928Q-Q1

Hi expert,

My customer is tring HDCP between DS90UH928Q-Q1 and DS90UH925-Q1.

However, HDCP cannot be enabled. they cannot understand the reason.

They are tring several setting for SER/DES devices.

Could you please give me your advice for HDCP operation?  (How to analyze the reason)

I2C control log is below,

(S: start, P: Stop, _: ACK, ^NACK)

S1A_C3_80_P

S1A_C2_48_P

S1A_C3_S1B_00^P

S1A_C3_01_P

S1A_C3_S1B_00^P

S1A_C4_S1B_68^P

S1A_80_S1B_00_00_00_00_00^P

S1A_90_S1B_00_00_00_00_00^P

S1A_A0_S1B_00_00_00_00^P

Thanks

Muk