A different type of adapter must be used when going from HDMI to DisplayPort: The HDMI specification does not support the DisplayPort LVDS signal type, and if the HDMI TMDS is plugged into a DP monitor, it will not work.
Can you output from HDMI to DisplayPort?
Active HDMI to DisplayPort Adapter The Cable Matters HDMI to DisplayPort Adapter provides a simple solution for connecting a laptop with an HDMI port to a DisplayPort monitor. Connect a USB cable to a computer USB port or USB wall charger to power the conversion from HDMI to DisplayPort.
Why does HDMI to DisplayPort not work?
At times you may see a No Signal error when trying to connect your DisplayPort to HDMI adapter to your PC or monitor. The DisplayPort to HDMI adapter not working usually occurs if the adapter hardware is faulty. However, the issue can also be triggered due to a faulty HDMI port or even incorrect device configuration.