From: "Carlo Caione" <ccaione@baylibre.com>
To: "Carlo Caione" <ccaione@baylibre.com>,
"GSS_MTK_Uboot_upstream" <GSS_MTK_Uboot_upstream@mediatek.com>,
"Bin Meng" <bmeng.cn@gmail.com>,
"Chunfeng Yun" <chunfeng.yun@mediatek.com>,
<u-boot@lists.denx.de>
Cc: "Ryder Lee" <ryder.lee@mediatek.com>,
"Weijie Gao" <weijie.gao@mediatek.com>,
"Igor Belwon" <igor.belwon@mentallysanemainliners.org>,
"David Lechner" <dlechner@baylibre.com>,
"Julien Stephan" <jstephan@baylibre.com>,
"Marek Vasut" <marex@denx.de>, "Tom Rini" <trini@konsulko.com>,
"Lukasz Majewski" <lukma@denx.de>,
"Mattijs Korpershoek" <mkorpershoek@kernel.org>,
"Vitor Sato Eschholz" <vsatoes@baylibre.com>
Subject: Re: [PATCH v3] usb: mtu3: wait for TX FIFO to drain before disconnect
Date: Sat, 01 Aug 2026 08:42:49 +0200 [thread overview]
Message-ID: <DKDEITT18XJS.18WZM0Q9PGROO@baylibre.com> (raw)
In-Reply-To: <20260720-ccaione-upstream-mtu3-tx-fifo-drain-v3-1-45c0e072b64a@baylibre.com>
On Mon Jul 20, 2026 at 10:03 AM CEST, Carlo Caione wrote:
> Fastboot unregisters the USB gadget from the completion callback of
> its final OKAY response. MTU3 QMU can report that request complete
> while bytes remain in the endpoint TX FIFO. Disabling the USB function
> immediately can therefore disconnect the host before it receives the
> response.
>
> Before selecting the high-speed or SuperSpeed disconnect operation, poll
> the FIFO state of enabled IN endpoints that have no pending requests.
> Bound the wait to 1 ms. If a FIFO does not drain, reset its endpoint,
> force the disconnect, and propagate -ETIMEDOUT through the gadget pullup
> operation. Endpoints with pending requests are skipped so an ordinary
> disconnect does not wait for an active transfer.
[...]
Hi Marek,
can you PTAL? Thanks,
--
Carlo Caione
next prev parent reply other threads:[~2026-08-01 6:43 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-07-20 8:03 [PATCH v3] usb: mtu3: wait for TX FIFO to drain before disconnect Carlo Caione
2026-08-01 6:42 ` Carlo Caione [this message]
2026-08-01 9:52 ` Marek Vasut via U-Boot
2026-08-02 6:57 ` Carlo Caione
2026-08-02 15:06 ` David Lechner
2026-08-02 17:34 ` Marek Vasut via U-Boot
2026-08-03 12:59 ` David Lechner
2026-08-03 17:05 ` Marek Vasut via U-Boot
2026-08-03 21:04 ` David Lechner
2026-08-04 0:51 ` Marek Vasut via U-Boot
2026-08-02 17:30 ` Marek Vasut via U-Boot
2026-08-01 14:28 ` Marek Vasut via U-Boot
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