HDMI failed to read the EDID,can you give me some advice?

we now have a problem with the hdmi interface on my custom board, the hdmi ddc failed to read the hdmi edid. I measured the signal wave of the HDMI_DDC_SCL and the HDMI_DDC_SDA,and the SDA line is not ok,please explain this ,thank you very much.

Thank you for your time

Hi wanglkzf,

Sorry for late reply. Does your design follow our product design guide?

I don’t know what the correct voltage levels are, but you might want to verify level shifting requirements.