AR# 70870

HDMI RX Subsystem v3.1 - Link quality becomes bad after running for 15~45 minutes

Description

When I connect a 4kp60 HDMI source, it works well at first but the video drops after 15 to 45 minutes.

HDMI RX reports bad link quality:





Solution

This is a known issue in HDMI v3.1 in Vivado 2018.1 and 2018.2. It has been fixed in the 2018.3 release and later versions

When the issue occurs, the link error counter increases, the user might see display blinks, and then the RX stream is recovered quickly.

To detect this issue, you can use the API XV_HdmiRxSs_ReportLinkQuality to print out the link quality.

This issue only occurs in the HDMI 2.0 resolution where the scrambler needs to be enabled, for example with 4kP60 RGB.

  • Vivado 2018.1 - Users can download the HDMI Receiver Subsystem patch from (Xilinx Answer 71203) to work around this issue.
  • Vivado 2018.2 - Users can download the HDMI Receiver Subsystem patch from (Xilinx Answer 71204) to work around this issue.
  • Vivado 2018.3 - The issue has been fixed in Vivado 2018.3 and later versions.

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AR# 70870
Date 01/09/2019
Status Active
Type General Article
IP