For revision D, the HDMI framer has been updated due to NXP stopping manufacturing of the TDA19988. We’ve replaced it with an ITE IT66122.
Detailed information on the update and information for updating your software will be included here as we make it available. For questions, please contact us at https://forum.beagleboard.org/tag/beaglebone-black.
PR with driver: https://github.com/beagleboard/linux/pull/293