Thanks for the pointers regarding rolling back to 5.60, I was able to get the HDMI output back.
I also attempted to use the steps provided by @InterAct for the newer kernel. These steps did not work for me.
I noticed in 5.60 that both imxdrm and dw_hdmi_imx were loaded. Executing insmod on imxdrm.ko seems to work. However, if I attempt to execute insmod using the dw_hdmi-imx.ko file it fails with the following error:
insmod: ERROR: could not insert module dw_hdmi-imx.ko: Unknown symbol in module
Looking at the output from dmesg I see:
dw_hdmi_imx: Unknown symbol dw_hdmi_bind (err -2)
dw_hdmi_imx: Unknown symbol dw_hdmi_unbind (err -2)
I'm guessing this is the cause of the issue. Anyone else seeing the same or know how to correct the problem?