I am using a ADV7619 rx. I am succesfully recieving video content using the rx. However when I try to read the content on audio pins it is always 0. I am expecting the audio in I2S mode.The N and CTS values read back from rx chip are correct (checked using a hdmi analyzer). serial clk and lrclk (AP5 pin) is also coming up fine. Is there any audio programming sequence provided?