HPC=high performance compute. I'm not sure that HDR would come up there. Maybe you are thinking of HTPC (home theater personal computer)?
I actually was just looking this up, quite randomly. I think it is actually a soft no, in the sense that support is essentially non-existent now, but it is being worked on.
It appears to be an annoying situation where HDCP (high definition content protect, I think) content has some sort of encryption baked in that requires proprietary driver/hardware support. Since the main use case for HDR is watching movies, and we can't do that without the proprietary stuff, there's not a ton of incremental value for the community to get by working on it. But Intel, Nvidia, AMD, and Red Hat are all working on it.
advertises that they can process (decode?) 4k, 10 bit video, on a raspberry pi 4, but they apparently only 8 bit output is actually available. Not sure if this is a hardware or software limitation.
Anyway, the pieces are maybe coming together, just very slowly.
I actually was just looking this up, quite randomly. I think it is actually a soft no, in the sense that support is essentially non-existent now, but it is being worked on.
It appears to be an annoying situation where HDCP (high definition content protect, I think) content has some sort of encryption baked in that requires proprietary driver/hardware support. Since the main use case for HDR is watching movies, and we can't do that without the proprietary stuff, there's not a ton of incremental value for the community to get by working on it. But Intel, Nvidia, AMD, and Red Hat are all working on it.
https://www.phoronix.com/scan.php?page=news_item&px=Red-Hat-...
Also this recent version of libreelec
https://libreelec.tv/2021/11/03/libreelec-matrix-10-0-1/
advertises that they can process (decode?) 4k, 10 bit video, on a raspberry pi 4, but they apparently only 8 bit output is actually available. Not sure if this is a hardware or software limitation.
Anyway, the pieces are maybe coming together, just very slowly.