HDMI TX Audio Information InfoFrame Packet Not Dropped

When you use the HDMI TX core with support auxiliary and support audio parameters turned on, the TX core does not drop the Audio Information InfoFrame packet on the auxiliary data port when you deassert the MSB of the audio_info_ai port (bit 48). This issue causes the auxiliary data stream to contain a mixture of different Audio Information InfoFrame packets.

To work around this issue, perform external filtering on the Audio Information InfoFrame packet on the auxiliary data port when you use the audio_info_ai port. When you deassert audio_info_ai[48], gate aux_valid when aux_data[7:0] = 8\'h84 and the core detects aux_sop = 1 and aux_valid = 1. Release the gating when the core detects aux_eop = 1 and aux_valid = 1.

This issue is fixed in version 15.1 of the HDMI IP core.