Changes between Version 11 and Version 12 of venice/PCIe


Ignore:
Timestamp:
03/20/2025 06:29:03 PM (11 days ago)
Author:
Tim Harvey
Comment:

added notes about venice-flex and pcie gen

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  • venice/PCIe

    v11 v12  
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    55= Venice IMX8M PCIe Support
    6 The IMX8M has a single PCIe Gen 2 host controller. Many Venice models have an on-board PCIe Gen 2 switch which allows the board to support more than 1 PCIe endpoint device.
     6The IMX8MM SoC has a single PCIe Gen 2 host controller and the IMX8MP SoC has a single PCIe Gen 3 host controller. Many Venice models have an on-board PCIe switch which allows the board to support more than 1 PCIe endpoint device. Note that the GW72xx/GW73xx/GW74xx boards have a Gen2 PCIe switch so even if you have one of those boards with a Gen3 capable PCIe host controller you will not have Gen3 from host to endpoint. This is not the case with Venice-Flex which uses an IMX8MP along with GW82xx/GW92xx baseboards for a Gen3 link from host to endpoint.
    77
    88A PCIe switch operates like a PCI bridge such that it will create additional subordinate busses.
    … …  
    1111
    1212'''Special Notes'''
    13  * When using a GW702x i.MX8M Plus SOM which supports Gen 3 PCIe, the switches used on the baseboard are Gen 2. GW71xx does not have a switch and thus can support Gen 3.
     13 * The GW83xx Venice-Flex baseboard has a Gen 3 PCIe switch therefore can support host to endpoint Gen 3 PCIe performance.
    1414 * The GW74xx SBC uses a i.MX8M Plus CPU which supports Gen 3 PCIe, but the PCIe switch used on GW74xx is Gen 2.
     15 * When using a GW702x i.MX8M Plus SOM which supports Gen 3 PCIe with a GW72xx/GW73xx baseboard, the switches used on the baseboard are Gen 2. GW71xx does not have a switch and thus can support Gen 3.
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