Man pages matching name tspi_tpm_stirrandom in section 3:

Tspi_TPM_StirRandom.3.en	debian 10 / libtspi-dev
Tspi_TPM_StirRandom.3.en	debian 11 / libtspi-dev
Tspi_TPM_StirRandom.3.en	debian 12 / libtspi-dev