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rimu@piefed.social

DisplayPort: A Better Video Interface (hackaday.com)

submitted 1 month ago by rimu@piefed.social to c/technology@piefed.social

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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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[–] MHLoppy@fedia.io -3 points 1 month ago (2 children)

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.

[–] ThrowawayPermanente@sh.itjust.works 2 points 1 month ago (1 children)

How is VESA supposed to fund their work? Volunteers? Unpaid Interns?

[–] MHLoppy@fedia.io 1 points 1 month ago

I'm not judging whether it's good or bad, I'm saying that despite their weird attitude, the root level comment is right that the design is not "open source" because the design is not freely accessible despite being royalty free for paying members to implement and use.

The same argument you're presenting could be used for commercial open source enterprise though, and that's not completely impossible to do via support fees and such.

[–] Coelacanthus@infosec.pub 1 points 1 month ago

What ever DisplayPort do, HDMI do more badly. HDMI also requires Annual Fee to get document now (since 2021, before that the document was public available). And this is not the worst thing, the worst thing is the HDMI forum disallow anyone open source a driver which support HDMI 2.1 or higher.

https://gitlab.freedesktop.org/drm/amd/-/issues/1417#note_2303163