ADV7842 detects TMDS clock and that it's locked, but measured frequency is always 0.

Question

Reading data from the IO register 0x6A and HDMI register 0x04 indicates that the TMDS clock is detected and locked, but reading from HDMI registers 0x51 and 0x52 always returns 0. 
 
 Any suggestions? 
 
 Thanks

JeffMcD · Accepted Answer

This problem is solved. For reasons I can't explain, I grounded RXA_5V, which apparently holds the HDMI circuit in reset. There is a way to disable this by writing to HDMI register 0x48. 
 Thanks for the help!)

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ADV7842 detects TMDS clock and that it's locked, but measured frequency is always 0.