Programming DisplayPort Sink - 3.0 English

DisplayPort 1.4 RX Subsystem Product Guide (PG300)

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3.0 English
  1. Disable Audio by writing 0x00 to the RX_AUDIO_CONTROL register. The disable bit also flushes the buffers in the DisplayPort Sink. When there is a change in video/audio parameters, Xilinx® recommends following this step.
  2. Enable audio by writing 0x01 to the RX_AUDIO_CONTROL register.
  3. To read the Info packet, poll the RX_AUDIO_STATUS[0] register, and when asserted, read all eight words.
  4. MAUD and NAUD are available as output ports and also in registers. Use these values per the design clocking structure. For example, in software, a poll routine can be used to detect a change and trigger a PLL-M and N value programming.