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DisplayPort in native mode lacks some HDMI features such as Consumer Electronics Control (CEC) commands. The CEC bus allows linking multiple sources with a sing
by LeoPanthera 2y ago
DisplayPort in native mode lacks some HDMI features such as Consumer Electronics Control (CEC) commands. The CEC bus allows linking multiple sources with a single display and controlling any of these devices from any remote. DisplayPort 1.3 added the possibility of transmitting CEC commands over the AUX channel. From its very first version HDMI features CEC to support connecting multiple sources to a single display as is typical for a TV screen.
The other way round, DisplayPort's Multi-Stream Transport allows connecting multiple displays to a single computer source.
This reflects the facts that HDMI originated from consumer electronics companies whereas DisplayPort is owned by VESA which started as an organization for computer standards.
- cesarb 2y ago> From its very first version HDMI features CEC That depends on whether or not you consider single-link DVI-D as the "very first version" of HDMI.
- DidYaWipe 2y agoI imagine CEC could be added to DisplayPort.
- Crespyl 2y agoDisplayPort->HDMI was the only way I could get my PC to control the TV it was attached to over CEC, since (apparently) the CEC pins aren't enabled on most consumer GPUs, but the DisplayPort aux pin can be used as an alternative. So the linux DisplayPort driver at least supports the feature, whether or not it's fully standardized/required.
- throwaway48476 2y agoDP has a different management interface that's actually better because it's a standard unlike CEC.