usb: gadget: net2280: Add workaround for AB chip Errata 11

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The errata description is:

Workaround for Default Duration of LFPS Handshake Signaling for
Device-Initiated U1 Exit is too short.

The default duration of the LFPS handshake generated by USB3380 for a device-initiated U1-exit may not be
long enough for certain SuperSpeed downstream ports (SuperSpeed hubs/hosts) to recognize. This could lead
to USB3380 entering the recovery state pre-maturely and ending up in the SS.Inactive state.

I have observed various enumeration failures, seemingly related to
lost transactions or SETUP status phases on modern hosts (typically
thunderbolt capable systems) without this workaround.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

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Benjamin Herrenschmidt 2019-08-30 13:56:14 +10:00 • committed by Felipe Balbi

parent ec8ca8a348

commit 18a93cd38b

1 changed files with 10 additions and 0 deletions

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drivers/usb/gadget/udc/net2280.c

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