2mo ago

DisplayPort: A Better Video Interface

Over the years, we’ve seen a good number of interfaces used for computer monitors, TVs, LCD panels and other all-things-display purposes. We’ve lived through VGA and the large variety of analog interfaces that preceded it, then DVI, HDMI, and at some point, we’ve started getting devices with DisplayPort support. So you might think it’s more of the same. However, I’d like to tell you that you probably should pay more attention to DisplayPort – it’s an interface powerful in a way that we haven’t seen before.

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2y ago

hackaday.com /2023/07/11/displayport-a-better-video-interface/

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2y ago

Displayport: A Better Video Interface

hackaday.com /2023/07/11/displayport-a-better-video-interface/

21 comments

Wow, learned quite a bit from that
- I just wish display port hasn't been "the up and coming new, better standard" for nearly 20 years.
  I remember being a teenager researching my first build and thinking 'I'd better make sure I get a display port compatible screen, or I won't be able to use it with a GPU in 5 years!'
  
  It's kinda funny cause my work computer had vga and displayport and not hdmi. Nice to learn why the adapters are the way they are
- Woah what's with the hostility
if displayport isn't backed by home media interests then why did they implement hdcp?
- probably to support devices that only work with it enabled
Fuck displayport! it's open source or nothing.
You want stupid apple bullshit? Because this is how you get stupid apple bullshit.
New HDMI is fine. Again, fuck displayport.
- open source or nothing New HDMI is fine
  Are you a troll or just stupid? (And I ask that sincerely). HDMI is a proprietary licensed specification.
  DisplayPort is royalty free and has a larger consortium backing the implementation.
  
  It's not quite fully open though https://en.wikipedia.org/wiki/DisplayPort
  VESA, the creators of the DisplayPort standard, state that the standard is royalty-free to implement. [...]
  While VESA does not charge any per-device royalty fees, VESA requires membership for access to said standards.[70] The minimum cost is presently $5,000 (or $10,000 depending on Annual Corporate Sales Revenue) annually.[71]
  That doesn't change how it's, hm, questionable to prefer HDMI on the basis of "open source or nothing" compared to DisplayPort, but still.
- Now show me on the doll where the display port touched you...
- Since nobody else is bothering to ask and just downvoting, I'm genuinely curious. Why fuck displayport and love hdmi?
Does anyone know of some affordable 4K@120Hz TVs that ship with DisplayPort interfaces, or any long fiber optic DisplayPort cables supporting the same resolution frame rate and bit depth as the HDMI 2.1 fiber optic cables on the market? That's one thing that's been holding me back from DisplayPort adoption.
- It's difficult to have. The members of HDMI Forum are almost the TV manufacturers and the members of VESA (the maintainer of DisplayPort) are PC and GPU munafacturers. So TV almost uses HDMI and monitor almost uses DisplayPort.
  
  This kind of splintering is really unfortunate. Would be nice to have a universal AV interface for consumer hardware. I'd also like to see one that supports bi-directional communication, like for forwarding human interfaces connected to TVs, like wireless game controllers, or programmatic control over internal settings like audio volume, brightness, contrast, motion smoothing, etc. I suppose displayport over thunderbolt plus embedded USB hubs in computer monitors gets close, but the display settings controllers usually require proprietary drivers and are vendor specific.
  I know both HDMI and Displayport enable remote control for basic features like turning the device on or off from sleep, but very few PCs or GPUs ship with HDMI-CEC. I've only seen a few mini PCS or single board computers ship with that.

21 comments