linux-kernel - Re: [PATCH v2] dwc2: Delay resume until device connection is stable

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Message-Id: <20251224110606.87610-1-jason.sun689@gmail.com>
Date: Wed, 24 Dec 2025 19:06:06 +0800
From: Jason Sun <jason.sun689@...il.com>
To: gregkh@...uxfoundation.org
Cc: linux-usb@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	sunqian@...arytech.com,
	jason.sun689@...il.com
Subject: Re: [PATCH v2] dwc2: Delay resume until device connection is stable

Hi Greg,

Thanks for the feedback.

At the moment I only have access to this board on a 5.15-based BSP, so I can only run-time test on v5.15.140. I don't currently have a working mainline (v6.x) boot chain for this hardware.

The patch applies cleanly and builds on the current usb.git tree (v6.15-based, build-tested only). The change is based on reviewing the resume path around VBUS enable, which still proceeds after a fixed usleep_range(3000, 5000) delay and can observe an unstable CONNSTS window on our setup.

Please let me know if build-tested on usb.git is acceptable for now, or if you'd prefer the change to be conditional (e.g. via DT or a module parameter).

Thanks,
Jason Sun