I wonder if the ADV7441 HDMI port B has its own set of equalizer registers or if it is the same set as HDMI port A (USER_MAP2 reg. F0-F7) ?
Those are undocumented registers that should be set to the "ADI Recommended Settings" in the scripts. We can't provide support or information for modifying those settings as the "recommended" settings are the ones that tested reliably over temp/voltage. We can't really guarantee operation across the full operating range with different settings.
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