PCIe gen 2 detection issue with T2080

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PCIe gen 2 detection issue with T2080

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Contributor I

Hi,
I am working with T2080NXE8P1B  device  and i am facing PCIe Gen 2 detection issue with that device I need some help to solve the PCIe Gen 2 detection issue.(i.e) what may be possible reason for that?

Thanks in advance

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Contributor I

Thank you for replay.

We configured PCI e gen2 x4 but its downgraded into gen1 x4 while booting.What could be reason for that? and Is that any options for changing de-emphasis level ? If possible kindly provide settings to change de-emphasis.level.

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NXP TechSupport
NXP TechSupport

The PCIe operation mode is negotiated with EP device.

You wrote:

> We configured PCI e gen2 x4

What exactly you have done?

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Contributor I

Sorry for inconvenience caused.

We configured  EP PCIe as gen 1 x4 PCIe link was detected in T2080.If same  EP PCIe is configure as gen 2x4 means PCIe link was not detected. What could be the reason for not detection?

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NXP TechSupport
NXP TechSupport

There could be many reasons:

1) incorrect EP x4 Gen2 configuring

2) incorrect T2080 PCIe configuring in RCW

3) signal integrity issue affecting Gen2 operation.

Please provide processor connection schematics as searchable PDF and RCW binary image for inspection.

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NXP TechSupport
NXP TechSupport

> PCIe Gen 2 detection issue

What exactly does it mean?

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