On Fri, Apr 12, 2024 at 10:26:06PM +0200, A. Sverdlin wrote:
From: Thinh Nguyen Thinh.Nguyen@synopsys.com
Upstream Linux commit 3aa07f72894d.
If there's a disconnection while operating in eSS, there may be a delay in VBUS drop response from the connector. In that case, the internal link state may drop to operate in usb2 speed while the controller thinks the VBUS is still high. The driver must make sure to disable GUSB2PHYCFG.SUSPHY when sending endpoint command while in usb2 speed. The End Transfer command may be called, and only that command needs to go through at this point. Let's keep it simple and unconditionally disable GUSB2PHYCFG.SUSPHY whenever we issue the command.
This scenario is not seen in real hardware. In a rare case, our prototype type-c controller/interface may have a slow response triggerring this issue.
Signed-off-by: Thinh Nguyen Thinh.Nguyen@synopsys.com Link: https://lore.kernel.org/r/5651117207803c26e2f22ddf4e5ce9e865dcf7c7.166804546... Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Alexander Sverdlin alexander.sverdlin@siemens.com
Confused, why did you resend this to us?