Cables and adapters for both directions. DisplayPort to HDMI connects a computer or graphics card to a TV or monitor with HDMI. HDMI to DisplayPort connects a laptop or console to a monitor that only has a DisplayPort input. Both image up to 4K and sound are transmitted.
How to choose. The direction matters: a DP to HDMI cable does not work in reverse, and HDMI to DisplayPort requires a specific model with a built-in converter. If you need 4K at 60Hz, check the specifications: some models only support 4K at 30Hz.