Thursday, 2022-03-17

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tntAnyone knows what the easiest/cheapest to get hardware is that supported "out of the box" by litepcie ?08:49
tntIn a vaguely related question, 0d8467364fd36da6cf6da43d74832bd611f0d0f6 says 64b addressing is only supported for 64b datapath, that means  the 'data_width' params on the phy ? So I guess pcie 4x wouldn't work.08:51
_florent_tnt: the SQRL Acorn (CLE101/215+) or LiteFury/NiteFury are probably the cheapest way to get "out of the box" LitePCIe10:41
_florent_tnt: A decklink mini 4k is also a good option: https://www.blackmagicdesign.com/fr/products/decklink/techspecs/W-DLK-3210:43
tpbTitle: DeckLink – Spécifications techniques | Blackmagic Design (at www.blackmagicdesign.com)10:43
_florent_tnt: JTAG pins are directly on the silkscreen10:43
tntOh yeah, the DeckLink, good call.10:43
tntThe SQRL looked nice but can't find any ATM.10:44
_florent_and the target is also available at: https://github.com/litex-hub/litex-boards/blob/master/litex_boards/targets/decklink_mini_4k.py10:44
_florent_for Ultrascale, the Decklink Quad HDMI recorder is also interesting: https://www.blackmagicdesign.com/fr/products/decklink/techspecs/W-DLK-3610:45
tpbTitle: DeckLink – Spécifications techniques | Blackmagic Design (at www.blackmagicdesign.com)10:45
_florent_that's a XCKU04010:46
tntI was actually looking at that because, I could possibly use it afterward for what's it intendended for :)10:47
_florent_DDR3 has been also been reversed on the mini 4k and quad hdmi recorder and is working with LiteX10:47
tntWht's the usb port for ?10:48
_florent_firmware update I imagine but I haven't tried to understand how it works10:48
_florent_it's probably common between all boards,10:49
_florent_so documenting it for one board would enable support for all boards :)10:49
_florent_tnt: BTW, the mini 4k recorder/monitor are almost the same boards. The difference is mostly on the Video side where transceivers where RX ones are used in one cases/TX in the other.10:51
_florent_tnt: PCIe/DDR3/JTAG/Debug are similar10:51
_florent_I'm also planning to play with them for other use cases in the future10:53
tntToo bad they didn't include muxes to dynamically switch :)10:53
_florent_Could be wanted to sell more boards :)10:54
tntoh there is even a uart, how convenient.10:54
_florent_That's really some nice/cheap hardware10:55
_florent_and easy to find/source10:55
tntyeah, that's the main thing, being readily available.10:55
_florent_one other nice things is that they generally reuse a lot between boards10:57
_florent_for example, IIRC DeckLink Duo2 is similar on PCIe/DDR3 than the Mini 4k10:57
_florent_and DeckLink Quad 2 is just the Duo2 duplicated10:58
tntThe hdmi pairs are directly connected to GTx btw ?10:58
_florent_tnt: yes, it's the case on the mini 4k and quad hdmi recorder13:00
_florent_I just did a quick test last year at 1080p60 on the mini 4k: https://twitter.com/enjoy_digital/status/138999967071860326413:00
tnt_florent_: Ah nice. I saw there is a redriver in the path though.13:09
tnt_florent_: btw, any comment on the 64b addressing thing above ?13:09
_florent_64-bit addressing is only supported for 64-bit datapaths13:22
_florent_So PCIe Gen2 X1 or X2 on Artix713:22
_florent_that's the configuration I tested13:23
_florent_I want to rework a bit the TLP Packetizer before extending to other data-width, to avoid duplicating too much code13:24
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