From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-wm1-f54.google.com (mail-wm1-f54.google.com [209.85.128.54]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 8A87C3AEF5B for ; Tue, 20 Jan 2026 20:39:08 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.54 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768941552; cv=none; b=ZLBPn7HVqSqfEu1Fi+IOIpxgCd+rEEzFhgdXAtfTRYjcUwROyj3CqOY+0EOhsDFl8OuSf+HGFNum5uLaR/It77LvqrPU2AUp+hywRs1HI/FngCIhrL7YrOpCK9GnOBoAL+QMt/xvJVfFlVP3EqQFbYl/Bc7JD703YrnCruIjerk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768941552; c=relaxed/simple; bh=mMtTD74lHWGhMPk0VhK0pFoRiy76ELQ90jr0VFXLeVE=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=UgRfskEU9QSigS7J8zTNiqpOMjKQtx3d16cr5u2ZlGGP+Q5ejPZBNAwK05CYxHSQX+3XtnMk9vZXb1onLu9y+iGJQ5/pVomVW2giwD0dfib+u5UsswFZD8fFwqZRfsTUhu6JC4fkYeJyECofe8Yar1EtVsEcfiMAmHCnU7Ttlzc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=AelkI58g; arc=none smtp.client-ip=209.85.128.54 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="AelkI58g" Received: by mail-wm1-f54.google.com with SMTP id 5b1f17b1804b1-47edd6111b4so53563605e9.1 for ; Tue, 20 Jan 2026 12:39:08 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1768941547; x=1769546347; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=qrKCUKKckHcjjuwU+EHrOyUAQd4woAILl74Bd1qw4Gk=; b=AelkI58gwaQ75UdNxzl/DvqSfPJq2jw5VqF/CpT89xAunquj1i9yoGDQ1Wt6RELyoL xmCyGQrfO20IlFVPv+eMFZUW2rC6cadg8pGJejRGq2r320nTdg9GyFPD6EaNCRhK/QbQ eOg9gmiV2X+aERUWumvrfr6CWjJRwOtOeOpyzTX/uAtuAModxBPONu2R2S88Gi5/Z0Hx c8s1BJhuIfz/JEHHWFL8lbW55D2acm3KyMyNtj+aRViIcI21P59dVY1zRlSF644BnAnA PQ54amdfGEptNmgwhXNTR0iULwwIh2yeOog3+ZfJU9uUCobeRhaRn5X9k+k9bCbPGNKn gLmw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1768941547; x=1769546347; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-gg:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=qrKCUKKckHcjjuwU+EHrOyUAQd4woAILl74Bd1qw4Gk=; b=a/rGGdFmfVgNOUwGTL72ncTj2wVFGbCR1Em29XGEAYYa3vDqizoPd7EZVBhTGMVBZa v7BckEOYtfspv/g/Cfax3zO2NuRiDsceB2OmgHOKJiUwa3Hgi3SYfHdldqKnhf55152D GXP1XD4c0p8rZWYZHOX7wAyASxs4txL7BEIysfHD+B3xEGK3SwTvOi34/QGMJF1k65k0 QxT0zRos7TFtHNt9rFt4bC2j1DqSoUpKSdsBpjMPWbvWOm+tLSUHacZBW69D+bS8VuPV uFlLdtmBPiTsokzKxPTOvm31Lp0NYUQPd/JbK3HkwrB08FHK6uqdmSv3T4NGRQX3bg6L 1/fA== X-Gm-Message-State: AOJu0YzD5DR2h0jWZLZkJw4q+6HGD4SFScgUl7jd9FdMTuOJCGD0Dxjg kXPiKbpD/agt01Wv++XYL4JS7bMXB7VgtV6HICrDauj90cySXLamcyl8 X-Gm-Gg: AY/fxX5ILzQXslfrEMRM82g1Bov9aYZkAOAjqGjZd5vxSXaVOfuF9EU7YJ6Nv3lksLF InuQGsXQGb7/E3K4ul7GKeWMXYeH/2SEwSiNCaYGb65bj2jjDVjk1P3zSQwJVBe8xPYn/c2Q3o1 Oh8INupvsZmR+tJbDaIE3KaRvz0bzhzxkxe6AdYszS5rVYbivFKQv/ypG03OykPiQ1BFIzKiQIe NhkHW3+c2F65DnwxhqNJMA8HV8/7m9Q/xvLojJhXgadxLk8I7ow+HmdqU6KZmjKqTkVMM/6F/GM TTViOqiQz7fVyP28CrI2GIbxGH4EcZ1scKtrzdMti18Wzi8TB23ChfqDOGytR4HVhXfV/AZ+j4r ngcxsXqZ85xRAkWhh4mULm8S/t/vERi8SUrxyrvptRSblVhXFm+hXvr16lnGd2uoygqWQAykvAe wzrrHx3m+5kwcWJvI+ X-Received: by 2002:a05:600c:414f:b0:480:20f1:7abd with SMTP id 5b1f17b1804b1-48020f17c12mr160684545e9.31.1768941546639; Tue, 20 Jan 2026 12:39:06 -0800 (PST) Received: from eichest-laptop.lan ([2a02:168:af72:0:378b:c660:2f9c:b651]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-48042c3a7c1sm850425e9.13.2026.01.20.12.39.05 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 20 Jan 2026 12:39:06 -0800 (PST) From: Stefan Eichenberger To: andrew+netdev@lunn.ch, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, mcoquelin.stm32@gmail.com, alexandre.torgue@foss.st.com, shawnguo@kernel.org, s.hauer@pengutronix.de, kernel@pengutronix.de, festevam@gmail.com, hkallweit1@gmail.com, linux@armlinux.org.uk, linux-stm32@st-md-mailman.stormreply.com, maxime.chevallier@bootlin.com, francesco.dolcini@toradex.com Cc: netdev@vger.kernel.org, linux-arm-kernel@lists.infradead.org, imx@lists.linux.dev, linux-kernel@vger.kernel.org Subject: [PATCH net-next v3 0/3] net: stmmac: dwmac: enforce preamble before SFD for i.MX8MP Date: Tue, 20 Jan 2026 21:30:01 +0100 Message-ID: <20260120203905.23805-1-eichest@gmail.com> X-Mailer: git-send-email 2.51.0 Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit This series adds a new phy_device flag PHY_F_KEEP_PREAMBLE_BEFORE_SFD that allows a MAC driver to request to keep the preamble bytes before the start frame delimiter (SFD) when receiving frames from the PHY. This flag is set in the stmmac driver for the i.MX8MP SoC due to errata (ERR050694), which causes it to drop frames without a preamble. The Micrel KSZ9131 PHY supports keeping the preamble before SFD by setting an undocumented flag, that was confirmed by NXP and Micrel. This new feature has been added to the Micrel PHY driver for the KSZ9131 PHY. Changes since v2: - Instead of using phy_register_fixup add a new phy_device::dev_flags flag PHY_F_KEEP_PREAMBLE_BEFORE_SFD so that a MAC can request to keep the preamble before SFD if needed (Russell) - Link to v2: https://lore.kernel.org/all/20260105100245.19317-1-eichest@gmail.com/ Changes since v1: - Use phy_register_fixup_for_uid() instead of adding a new device tree property - I will send the conversion of the micrel.txt binding as a separate patch series - Link to v1: https://lore.kernel.org/all/20251212084657.29239-1-eichest@gmail.com/ Stefan Eichenberger (3): net: phy: add a new phy_device flag to keep preamble before sfd net: phy: micrel: add option to keep the preamble before sfd for KSZ9131 net: stmmac: dwmac-imx: keep preamble before sfd on i.MX8MP drivers/net/ethernet/stmicro/stmmac/dwmac-imx.c | 6 +++++- drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 8 +++++++- drivers/net/phy/micrel.c | 14 +++++++++++++- include/linux/phy.h | 5 +++-- include/linux/stmmac.h | 1 + 5 files changed, 29 insertions(+), 5 deletions(-) -- 2.51.0