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tnt | _florent_: btw, did you get a chance to look at pcie 8x ? | 11:04 |
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tnt | Also, I'd like to get the GTH ultrascale support for liteiclink upstreamed. | 11:05 |
_florent_ | tnt: Sorry, not yet, but I'm starting a build with PCIe 8X on the FK33 right now | 11:10 |
_florent_ | tnt: Sure for GTH Ultrascale support to LiteICLink (and thanks), can you create a PR? I could then figure out the best way to integrate (duplication of code vs simplicity to copy wizard generated parameters) | 11:12 |
_florent_ | tnt: where you also planning to upstream the tool you created to get parameters from the wizard? (it could help switching to the non-duplicated GTH wrappers) | 11:14 |
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tnt | _florent_: Huh, I can send it to you, but it's not exactly a user-friendly / ready-to-use thing ... you have to generate all the files manually and cut-and-paste the section with the params into a .txt files | 11:23 |
tnt | https://people.osmocom.org/~tnt/stuff/gth_cfg.tar.bz2 | 11:23 |
tnt | you can have a look. | 11:23 |
tnt | (see like gthe4_channel_wiz_wrapped.txt for instance, it has a comment line at the top where I cut&pasted it from) | 11:24 |
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_florent_ | ok thanks, I see | 11:27 |
_florent_ | thanks also for the PR, I'll try to have a closer look at it soon | 11:29 |
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tnt | Mmm ... so I think my issue is in the clock crossing between the PHY RX domain and the JESD domain. Data right out of the phy ( before the LiteJESD204BRXCDC ) seems good. Data after it is not. | 14:13 |
tnt | (for context ... trying to bring up jesd link ... I could swear I got it up in early tests back end of december but I have been unable to do it again since) | 14:15 |
tnt | Ok, nm ... I had clocking setup wrong. Last week during the debug I had switched a divider and forgot to put it back. Not sure what was the problem I had earlier, but it got fixed apparently. Now links get to the DATA phase. Now I "just" need to figure out how to properly synchronize multiple chips. | 16:07 |
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