HPD Event Handling - 3.0 English

DisplayPort 1.4 TX Subsystem Product Guide (PG299)

Document ID
PG299
Release Date
2022-05-04
Version
3.0 English
HPD signaling has three use cases:
  • Connection event defined as HPD_EVENT is detected, and the state of the HPD is 1.
  • Disconnection event defined as HPD_EVENT is detected, and the state of the HPD is 0.
  • HPD IRQ event as captured in the INTERRUPT_STATUS register Bit[0].
The following figure shows the Source core state and basic actions to be taken based on HPD events.
Figure 1. HPD Event Handling in Source Core