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DS160PR410 Automatically disable channel with hotplug?

Other Parts Discussed in Thread: DS160PR410

Hi Team,

We used PCIe Gen4 Redriver application for U.2 NVMe Device. and we found some strange status on the system.

Condition: Testing with Ubuntu Linux 20.04.2 / 18.04.5

a. Device does not install to the system, the system OS always showing PCIe Card Present.

b. The system seems normal, works fine without any issue.

We confuse :( . why the empty slot will showing the present device message.

So just try to load the default setting use SMBus reg 0x00 [channel reset control]. Amazing, the issue its disappear.

What register needs to set for U.2 NVMe Devie? Seems the re-driver will not turn off the channel automatically.

Another question, the issue related to hotplug function?