AnsweredAssumed Answered

ADV7619 invalid channel status

Question asked by sfortin on Aug 26, 2016
Latest reply on Sep 14, 2016 by JeyasudhaMuthuPerumal



We have these status occuring non-stop in our interrupt handler of the 7619 when it is connected to a specific source.

   - IO 0x65,  CS_DATA_VALID_RAW : Invalid Channel Status

   - IO 0x7E,  CTS_PASS_THRSH_RAW : Audio clock regeneration CTS value has changed more than threshold

   - IO 0x83,  FIFO_NEAR_UFLO_RAW:   Audio FIFO has reached low threshold defined in AUDIO_FIFO_ALMOST_EMPTY_THRESHOLD[:0]


Note that any other HDMI source does not generate these status.


Investigation on this specific source show ACR audio packet with strong variation on CTS exceeding maximum CTS_CHANGE_THRESHOLD[5:0] 0x68 0x10 that was set to maximum  0x3F minimizing frequency occurence of these status.


Is it possible to set the ADV7619 to ignore ACR CTS packet value so it make its own clock recovery?

Any suggestion to solve this issue is welcome.


Thanks for your support.