linux-kernel - [Query]usb: dwc2: suspend/resume support for DWC2_POWER_DOWN_PARAM

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Date:   Tue, 16 Jun 2020 17:03:11 +0800
From:   Jisheng Zhang <Jisheng.Zhang@...aptics.com>
To:     Minas Harutyunyan <hminas@...opsys.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [Query]usb: dwc2: suspend/resume support for
 DWC2_POWER_DOWN_PARAM_NONE case

Hi,

After reading current dwc2 code, I got an impression that resume from suspend
to ram isn't supported for DWC2_POWER_DOWN_PARAM_NONE case, right? In fact
we do see usb device can't resume properly with DWC2_POWER_DOWN_PARAM_NONE case.

If the impression is true, what's the proper technical direction? Add 
dwc2_host_enter_suspend() as dwc2_host_enter_hibernation()
and 
dwc2_host_exit_suspend() as dwc2_host_exit_hibernation()?

Thanks in advance,
Jisheng