Why does the HDMI Intel® FPGA Source IP display flickering image after reset operation?

Description

Due to a problem starting in version 19.4 of the Intel® Quartus® Prime Pro software when using the Intel® Arria® 10 Devices, and version 20.4 of the Intel® Quartus® Prime Pro software when using the Intel® Stratix® 10 devices, the HDMI Intel® FPGA Source IP core may display flickering image after reset operation.

This is due to a problem in the HDMI Intel® FPGA Source IP core TX auxiliary encoder design failing to re-align Start-of-Packet (SOP) with the auxiliary data. The corrupted auxiliary data causes the destination HDMI sink receiver to display a flickering image.

Resolution

This problem is fixed starting from the Intel® Quartus® Prime Pro Edition version 21.1 software.