DisplayPort RX IP does not support backpressure

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• DisplayPort IP RX 8.1G Unable to Achieve Interlane Alignment

  Description: DisplayPort IP(RX) operating at 8.1 Gbps may encounter an issue where the DisplayPort IP is unable to achieve interlane alignment during link training. This is due to some hardware have lane data arrives earlier than expected, resulting ...

• DisplayPort TX IP link training sequence not compliant with the DisplayPort Specification

  Description: The DisplayPort IP link training sequence is a subset of the DisplayPort Specification and does not yet support voltage and pre-emphasis adjustment requests, link rate down-training, or lane count down-training. Resolution: This will be ...

• DisplayPort IP RX Intermittent Interlane Alignment Loss of Lock for TPS2

  Description: When TPS2 is used during link training, intermittent occurrences have been observed where the DisplayPort IP internal deskew logic latches onto an incorrect test pattern alignment and is unable to recover. As a result, the DisplayPort IP ...

• DisplayPort IP resolutions must be divisible by 4

  Description: The DisplayPort IP may not be able to handle custom resolutions that are not divisible by 4 (i.e., 1366x768). This applies to both the RX and TX of DisplayPort IP. Resolution: This will be fixed in the next DisplayPort IP release.

• DisplayPort RX IP returns AUX_ACK instead of AUX_NACK when writing to an unsupported DPCD address

  Description: The DisplayPort IP generates an illegal response to an AUX request when accessing a reserved DPCD address. The DisplayPort RX IP should return AUX_NACK when writing to an unsupported DPCD address, but the design responds with AUX_ACK. ...