linux-kernel - Re: [PATCH] riscv: dts: sophgo: cv180x: fix USB dwc2 FIFO sizes

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Message-ID: <176422633734.834799.16302142544416130381.b4-ty@gmail.com>
Date: Thu, 27 Nov 2025 14:52:29 +0800
From: Inochi Amaoto <inochiama@...il.com>
To: "Anton D. Stavinskii" <stavinsky@...il.com>
Cc: Inochi Amaoto <inochiama@...il.com>,
	alex@...ti.fr,
	alexander.sverdlin@...il.com,
	aou@...s.berkeley.edu,
	conor+dt@...nel.org,
	devicetree@...r.kernel.org,
	dlan@...too.org,
	huangze@...t.edu.cn,
	krzk+dt@...nel.org,
	linux-kernel@...r.kernel.org,
	linux-riscv@...ts.infradead.org,
	looong.bin@...il.com,
	palmer@...belt.com,
	paul.walmsley@...ive.com,
	robh@...nel.org,
	sophgo@...ts.linux.dev,
	thomas.bonnefille@...tlin.com,
	unicorn_wang@...look.com,
	yu.yuan@...u.edu.cn
Subject: Re: [PATCH] riscv: dts: sophgo: cv180x: fix USB dwc2 FIFO sizes

On Wed, 26 Nov 2025 21:21:16 +0400, Anton D. Stavinskii wrote:
> I've tested the current dwc2 FIFO configuration and found that USB
> device mode breaks in ECM mode when transmitting frames larger than
> 128 bytes. For example, large ICMP packets or iperf3 traffic cause
> the USB link to hang and eventually disconnect without any messages in
> dmesg.
> 
> After switching to more conservative FIFO sizes, ECM becomes stable
> and no longer drops the connection. iperf3 now shows ~130 Mbit/s RX
> and ~100 Mbit/s TX on SG2002 (MilkV Duo 256M).
> 
> [...]

Applied to dt/riscv, thanks!

[1/1] riscv: dts: sophgo: cv180x: fix USB dwc2 FIFO sizes
      https://github.com/sophgo/linux/commit/1d3ed9920a193e5d99d651d6ec1dbbe215ca172f

Thanks,
Inochi