From: sashiko-bot@kernel.org
To: "Joonhoe Kim" <26rote@gmail.com>
Cc: linux-usb@vger.kernel.org
Subject: Re: [PATCH] usb: typec: mux: fsa4480: Keep the USB 2.0 switch on in DP-only modes
Date: Thu, 22 Oct 2026 16:54:09 +0000 [thread overview]
Message-ID: <sashiko-outbox-181833@kernel.org> (raw)
In-Reply-To: <20261022165143.1327-1-26rote@gmail.com>
> DisplayPort pin assignments C and E give all four SuperSpeed lanes to
> DisplayPort, but the USB 2.0 D+/D- pair is not part of the pin
> assignment and stays available. The FSA4480 sits on that pair, and in
> these modes the driver turns its USB switch off, so a USB 2.0 hub or
> device behind a DisplayPort sink is disconnected as soon as the
> DisplayPort mode is set.
>
> Configure the USB switch the same way in all DisplayPort modes.
>
> Fixes: c7054c31c1c9 ("usb: typec: fsa4480: rework mux & switch setup to handle more states")
> Signed-off-by: Joonhoe Kim <26rote@gmail.com>
Sashiko has reviewed this patch and found no issues.
--
Sashiko AI review · https://sashiko.dev/#/patchset/20261022165143.1327-1-26rote@gmail.com?part=1
next prev parent reply other threads:[~2026-10-22 16:54 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-22 16:51 [PATCH] usb: typec: mux: fsa4480: Keep the USB 2.0 switch on in DP-only modes Joonhoe Kim
2026-10-22 16:54 ` sashiko-bot [this message]
2026-10-23 8:01 ` Konrad Dybcio
2026-10-26 13:20 ` Heikki Krogerus
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