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I've been poking at (tearing my hair out over) DisplayPort support for the various graphics chips under Linux. Rather than post something here that would soon be out of date, I made a status page on the wiki. The executive summary right now is No It Doesn't Work, but that should change soon.

DP actually promises to be a pretty cool technology. Compared to DVI it seems a bit overengineered, but that's sort of like comparing a car to a skateboard. Given the per-port licensing tax on HDMI, I think DP's eventual dominance is inevitable, but HDMI is pretty entrenched so that won't be any time soon. We'll just have to deal with the connector conspiracy until HDMI dies.

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neillparatzo From: neillparatzo Date: March 16th, 2009 01:05 am (UTC) (link)
Can DisplayPort do scRGB?
ajaxxx From: ajaxxx Date: March 16th, 2009 03:39 am (UTC) (link)
Sure. It's not explicitly called out in the spec, but then, no RGB colorspaces are. It does specify encoding for any of 18/24/30/36/48 bits per pixel, and the OS is expected to get the color primaries and white/black points from the monitor's EDID block.
From: (Anonymous) Date: March 16th, 2009 03:25 pm (UTC) (link)


Thanks for this nice page. Hopefully more open drivers will support DP in the future. And I hope even more DP can stay parallel to HDMI. I needed to buy an HDMI cable yesterday, and it was awful expensive. I think the licenses are one reason. Don't know if DP cables are cheaper, though.
ajaxxx From: ajaxxx Date: March 16th, 2009 09:17 pm (UTC) (link)

Re: Thanks

Current market price has six foot DP cables at about $20, and six foot HDMI cables anywhere from $10 to $20. Presumably the demand for DP just isn't very high yet.

DisplayPort sources can drive HDMI sinks just fine with an adaptor cable, so there is an upgrade path. The reverse is not true.
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