linux-kernel - Re: [PATCH v2] usb: typec: tpcm: Fix PORT_RESET behavior for self powered devices

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Message-ID: <e37a37aa-a3de-439e-9c20-5216c2f316f7@sirena.org.uk>
Date: Wed, 28 Feb 2024 13:11:19 +0000
From: Mark Brown <broonie@...nel.org>
To: Badhri Jagan Sridharan <badhri@...gle.com>
Cc: gregkh@...uxfoundation.org, linux@...ck-us.net,
	heikki.krogerus@...ux.intel.com, kyletso@...gle.com,
	linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
	rdbabiera@...gle.com, amitsd@...gle.com, stable@...r.kernel.org,
	frank.wang@...k-chips.com
Subject: Re: [PATCH v2] usb: typec: tpcm: Fix PORT_RESET behavior for self
 powered devices

On Wed, Feb 28, 2024 at 12:05:12AM +0000, Badhri Jagan Sridharan wrote:
> While commit 69f89168b310 ("usb: typec: tpcm: Fix issues with power being
> removed during reset") fixes the boot issues for bus powered devices such
> as LibreTech Renegade Elite/Firefly, it trades off the CC pins NOT being
> Hi-Zed during errory recovery (i.e PORT_RESET) for devices which are NOT
> bus powered(a.k.a self powered). This change Hi-Zs the CC pins only for
> self powered devices, thus preventing brown out for bus powered devices

Tested-by: Mark Brown <broonie@...nel.org>

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