The host shows below error after configuring TPM even if the configurations are correct.
"TPM 2.0 device detected but a connection cannot be established"

Symptoms:
The host shows below error after configuring TPM even if the configurations are correct.
"TPM 2.0 device detected but a connection cannot be established"

VMware vSphere ESXi 6.7
VMware vSphere ESXi 7.0.0

tpmdriver was missing from the installed vibs causing the host not to communicate with the underlying TPM hardware resulting in the error.

Will see below logs in vmkwarning/vmkernel
------------------------------------------------------------
vmkwarning.all:2020-11-12T17:36:36.007Z cpu24:2097931)WARNING: tpmDriver: TpmDriverInitImpl:307: TPM 2 SHA-256 PCR bank not found to be active.
vmkwarning.all:2020-11-12T17:36:36.007Z cpu24:2097931)WARNING: tpmDriver: TPMDriverAttachDevice:216: \_SB_.TPM_: couldn't perform TIS init
vmkwarning.all:2020-11-12T17:36:36.008Z cpu24:2097931)WARNING: Elf: 3110: Kernel based module load of tpmdriver failed: Failure <Mod_LoadDone failed>

Engage with hardware vendor to provide the tpmdriver vib for the host to communicate with underlying TPM.

Workaround:
NA

Impact/Risks:
TPM 2.0 will not work on host.