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Experimental Out-Of-Tree Code Aims To Provide HDMI 2.1 FRL For AMD Linux Driver
Post Reply RetroFed Forum Forum Index » PC Gaming
AuthorMessage
1Fuji2Taka3Nasubi piefed.zip 1Fuji2Taka3Nasubi@piefed.zip
Joined: 2025-07-19
Quote
Link: https://www.phoronix.com/news/AMDGPU-HDMI-2.1-FRL

One of the limitations of the AMDGPU Linux kernel graphics driver has been the lack of its support for HDMI 2.1 and later. AMD has wanted to support HDMI 2.1+ functionality under Linux but it's been legally blocked by the HDMI Forum. But anxious independent users have been working on open-source patches for wiring up HDMI 2.1 into the AMDGPU driver outside of the realm of AMD and the HDMI Forum's blessings. ……
88   Original
lemonySplit lemmy.ca lemonySplit@lemmy.ca
Joined: 2025-07-12
#2 · Quote Reply

Fuck the HDMI forum. Displayport is the one true connector
54
mnemonicmonkeys sh.itjust.works mnemonicmonkeys@sh.itjust.works
Joined: 2023-06-17
#3 · Quote Reply
lemonySplit wrote:
Fuck the HDMI forum. Displayport is the one true connector

What about USB?
3
Midnitte beehaw.org Midnitte@beehaw.org
Joined: 2023-06-01
#4 · Quote Reply
lemonySplit wrote:
Fuck the HDMI forum. Displayport is the one true connector

Need to pressure TV manufacturers to adopt it
20
oni ᓚᘏᗢ lemmy.world capuccino@lemmy.world
Joined: 2024-08-28
#5 · Quote Reply

Should I change to Displayport to unlock all my AMD GPU potential?
22
Peffse lemmy.world Peffse@lemmy.world
Joined: 2023-09-28
#6 · Quote Reply
mnemonicmonkeys wrote:
What about USB?

Are you talking about USB4u2x2phaseCmk3v5?
20
Victor lemmy.world victorz@lemmy.world
Joined: 2023-11-14
#7 · Quote Reply
oni ᓚᘏᗢ wrote:
Should I change to Displayport to unlock all my AMD GPU potential?

Yes.
22
Victor lemmy.world victorz@lemmy.world
Joined: 2023-11-14
#8 · Quote Reply

these patches certainly wouldn't be accepted for upstreaming to the AMDGPU driver given HDMI Forum's rejection already and needing to clear AMD's legal review. It may help apply pressure on the HDMI Forum to change course especially if Valve and other stakeholders get involved, but this has been an unfortunate issue going back years already. AMD Linux users are best off just using DisplayPort where possible.
10
recursive_recursion piefed.ca recursive_recursion@piefed.ca
Joined: 2025-06-06
#9 · Quote Reply

Eh, I already moved to displayport and I'm not interested enough to go back
4
greybeard feddit.online greybeard@feddit.online
Joined: 2025-06-04
#10 · Quote Reply
mnemonicmonkeys wrote:
What about USB?

That is a displayport connector, you are correct.
5
Default Username lemmy.dbzer0.com defaultusername@lemmy.dbzer0.com
Joined: 2025-06-12
#11 · Quote Reply
Midnitte wrote:
Need to pressure TV manufacturers to adopt it

They have been in recent years in the form of USB-C Alt Mode.
9
doublah sopuli.xyz doublah@sopuli.xyz
Joined: 2025-12-20
#12 · Quote Reply
Midnitte wrote:
Need to pressure TV manufacturers to adopt it

The HDMI forum is made up of those TV manufacturers, so I doubt they'd help push an open standard that'd earn them less.
11
Midnitte beehaw.org Midnitte@beehaw.org
Joined: 2023-06-01
#13 · Quote Reply
Default Username wrote:
They have been in recent years in the form of USB-C Alt Mode.

I didn't realize alt mode used DP (but I guess that makes sense) - good to know, will definitely look for that in my next TV
2
mushroomman_toad lemmy.dbzer0.com mushroomman_toad@lemmy.dbzer0.com
Joined: 2025-07-20
#14 · Quote Reply
Midnitte wrote:
I didn't realize alt mode used DP (but I guess that makes sense) - good to know, will definitely look for that in my next TV

Yeah USB-C doesn't support HDMI at all. All USB-C+HDMI adapters use DP signalling on the cable.
2
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