Report: Faulty HDMI 2.1 chip in receivers also prevents QMS from working - FlatpanelsHD
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Report: latest AVRs from Sony, Denon / Marantz, Yamaha, etc. have a bug in the HDMI 2.1 chip - unable to pass through the 4k120hz HDR10 signal (german article) : r/xboxone
TPD12S016 Value-Line HDMI Companion Chip - TI | Mouser