Re: [PATCH 6/6] usb: dwc3: gadget: Disable GUSB2PHYCFG.SUSPHY for End Transfer

[Greg Kroah-Hartman <gregkh@linuxfoundation.org>]

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/5651117207803c26e2f22ddf4e5ce9e865dcf7c7.1668045468.git.Thinh.Nguyen@synopsys.com
> 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?