From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from pandora.armlinux.org.uk (pandora.armlinux.org.uk [78.32.30.218]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C495017BA2; Fri, 13 Feb 2026 18:47:39 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=78.32.30.218 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771008462; cv=none; b=jrzHRjaB+adjNEJngpzciPXbk5HTTfYmunA7I4LUInyoQJIRSuy1n99ixqqXckv8QOIvix7wAs2o8CoMTVuUOUAkpbJPohYq7uPJevBzwHpkXSR9lBZac10MjGHqKNS2Q//9BvVL7A1MR2cyZUAR2Fa/ScJw+yr0gTJ2NG7RmGU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771008462; c=relaxed/simple; bh=TJY/s3H43xuizNMto+kfjJvv/5kkOlYO7V/EZHsTUiA=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=Cvuw7+4gPwgd2moAnnyqEovm6vII/1iwCWo+bilooFcdAQbhFBEJ9LVe03fpQgcn47N23zuc+KVtfAvepWXXBXNOSi/RVeUNBqXXyQw45io27Quv2GbT6YwnvvOpDaEip/op/nSPD0uIWqJj+UI7949eIZnIZ2i9ZD59OKbh80s= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=armlinux.org.uk; spf=none smtp.mailfrom=armlinux.org.uk; dkim=pass (2048-bit key) header.d=armlinux.org.uk header.i=@armlinux.org.uk header.b=Uw3nfuQk; arc=none smtp.client-ip=78.32.30.218 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=armlinux.org.uk Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=armlinux.org.uk Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=armlinux.org.uk header.i=@armlinux.org.uk header.b="Uw3nfuQk" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=armlinux.org.uk; s=pandora-2019; h=Sender:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=75dVsMxQSCtUUOY53Ie7fIWd+5uJDH3ZUDCTQzFC4E0=; b=Uw3nfuQk2vnBKDqEE0hg49gaGP jOFooSYkHGRmG1wuaPpOukxKzyUbS4AH/11S8n/03zr+ibncYMYo+YxyX4MR8dq4FnBaKVMyMeBPd tv2nXH1JbMp9Vy4z2PMyr02z3CLML3I5NapbP3aDJKubc4BF5nfnJ8xBEQY7PI/4p7OcItYaBlmZk IwcX/rf7J+ftwQFedzA7b13Dqy794HJxpbySNBpBKyb/fIP3G6NB/7rBHLytqjkNZit8MHeXyhdp4 Qga9tk9lYwTWVb7s12Y+QUUM3j896xk+e5wEUTzlF9b8Ztkv2ACGfGTiwUzkDegKWIQhLWb44azds deqmxpQA==; Received: from shell.armlinux.org.uk ([fd8f:7570:feb6:1:5054:ff:fe00:4ec]:51324) by pandora.armlinux.org.uk with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.98.2) (envelope-from ) id 1vqyCF-000000005SA-1E56; Fri, 13 Feb 2026 18:47:19 +0000 Received: from linux by shell.armlinux.org.uk with local (Exim 4.98.2) (envelope-from ) id 1vqyCA-0000000060W-1oGw; Fri, 13 Feb 2026 18:47:14 +0000 Date: Fri, 13 Feb 2026 18:47:14 +0000 From: "Russell King (Oracle)" To: Yao Zi Cc: Heiko Stuebner , Andrew Lunn , Heiner Kallweit , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Rob Herring , Krzysztof Kozlowski , Conor Dooley , netdev@vger.kernel.org, linux-rockchip@lists.infradead.org, linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org Subject: Re: Problematic understanding of phy-mode in Rockchip DWMAC driver Message-ID: References: Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Sender: Russell King (Oracle) On Fri, Feb 13, 2026 at 06:26:44PM +0000, Yao Zi wrote: > Hi folks, > > I was looking through the RGMII delay setup logic found in > rk_gmac_powerup() of dwmac-rk.c, and found its behavior is strange, dwmac-rk is very broken and is unfixable thanks to Rockchip not understanding the RGMII interface modes used by the kernel. It is what it is, we can't change it without causing regressions. Please do not try to fix it. -- RMK's Patch system: https://www.armlinux.org.uk/developer/patches/ FTTP is here! 80Mbps down 10Mbps up. Decent connectivity at last!