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Stavinskii" Cc: Inochi Amaoto , alex@ghiti.fr, alexander.sverdlin@gmail.com, aou@eecs.berkeley.edu, conor+dt@kernel.org, devicetree@vger.kernel.org, dlan@gentoo.org, huangze@whut.edu.cn, krzk+dt@kernel.org, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org, looong.bin@gmail.com, palmer@dabbelt.com, paul.walmsley@sifive.com, robh@kernel.org, sophgo@lists.linux.dev, thomas.bonnefille@bootlin.com, unicorn_wang@outlook.com, yu.yuan@sjtu.edu.cn Subject: Re: [PATCH] riscv: dts: sophgo: cv180x: fix USB dwc2 FIFO sizes Date: Thu, 27 Nov 2025 14:52:29 +0800 Message-ID: <176422633734.834799.16302142544416130381.b4-ty@gmail.com> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20251126172115.1894190-2-stavinsky@gmail.com> References: <20250611082452.1218817-4-inochiama@gmail.com> <20251126172115.1894190-2-stavinsky@gmail.com> Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit 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