Hi all,

I have a custom iMX8 PCB and the HDMI output is not working, the same module in the manufacturer's eval PCB gets a HDMI output, so my issue is not SW related.

I have measured all of the voltages on the TPD12S520 and all looks good, I have also checked that the I2C portion is working, when I reboot my board I see it talking to the display over I2C the slave address seems to be 0x50. This device ACKs and a lot of packets are generated after boot, but no video output, any tips or ideas where I might have went wrong? I see absolutely no activity on my HDMI pins at the connector, I have verified that the electrical connection is good to the iMX8 module.

I have a small error in the schematic where I connected the low voltage supply directly to 1.8V, I put this through a 10k res like in the reference design, but no change

Eoin