Regarding DisplayPort IP error for Secondary Stream, if IP detects an error, can it be confirmed by some signal? Is there an error correction function?

When an error is detected, there is no particular error flag, etc., and the received data is output as is.
DisplayPort IP does not have an error correction function.

(Reference) DisplayPort Intel® FPGA IP User Guide
https://www.intel.com/content/dam/www/programmable/us/en/pdfs/literature/ug/ug_displayport.pdf
(Audio and Secondary Stream Encoder Path item)

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