Thank you for the research. I was under the impression decode-dimms supported DDR5 already. but I really misread the patch. It's only adding support for listing DDR5 as the memory type, and nothing else. I may look into getting this done. Strictly as a hobby with limited time. On Sat, Apr 29, 2023 at 9:06 AM Jean Delvare <jdelvare@xxxxxxx> wrote: > > On Sat, 29 Apr 2023 17:15:22 +0200, Jean Delvare wrote: > > I took a quick look on jedec.org in search for information and found > > JESD400-5A which covers SPD contents for DDR5 and it enumerates 1024 > > bytes. This is twice as much as what EE1004 EEPROMs can hold, so DDR5 > > modules are definitely not using EE1004 EEPROMs. So far I couldn't find > > the "equivalent" of EE1004 for DDR5 modules so far. > > Found it, it is named "SPD5118 Hub and Serial Presence Detect Device > Standard" and is published by Jedec under reference JESD300-5B. That's > a 126-page document. In comparison, the EE1004 specification was > 35-page long. > > So I expect there will be a lot of work to get it to work. And I don't > own a DDR5-based system yet, so I can't even test. > > -- > Jean Delvare > SUSE L3 Support
