From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 8249AC25B75 for ; Wed, 29 May 2024 20:14:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=3ZaKxTowcQygsP0USuTPMUoHw5TCTSqVmBpKh+BMwJ0=; b=rUbs9du5Hcrahb NbHu9nZabhJANsDx1/TwofPuSfgR1yLj22sXJliJTor43v5XxB652kJkxcZX+I+t3U7IEoGS/4Bcz 8J8pnOno/x2Ao9lH8oGAVce+aCx+GbzRRx9Cs/tXo1VjS+cr9MJMhXA7EeJHL6Rfoii6j2N8CusLK f8qHk1wazYSp+0x3D/PcFLVTSV0IP9REKlRqzfbZGLuoSy3BczJK4nLjoEJdS6ltmiNCMrT3bLOOU O9yLh6HOU+2h3DJEq2GB4l7nWwWXPMlF/cwBnNU2xu3/TzEZdXXr6s+firl7spqqffDlWZcYqaZyC yp70x6/d6lSwQ1izJAFg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1sCPgN-00000005QLc-12cy; Wed, 29 May 2024 20:13:59 +0000 Received: from pandora.armlinux.org.uk ([2001:4d48:ad52:32c8:5054:ff:fe00:142]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1sCPgK-00000005QL9-2VPW for linux-arm-kernel@lists.infradead.org; Wed, 29 May 2024 20:13:57 +0000 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=eQFXKnSfwk440wscnRX9cECtvXQvJsH6al9gvAq5Rss=; b=qYza4Rbd8T0Qi9wO8nvW/LXuGl fDAszPm46VwyPttxInXsRB84FuTKZ9Iu+Oyhhedj3Q6B4bpxl6YVwP7egkoUC5DKplO6DK9Emvs88 6CpNDvmyIv5mxDI5yfXOaxA1hA8JlC+QYtHNu4QRNIbVKTfrJNaAc1UjvJbUrCoVHcZUDngkKGqWh L19sqtn8cWjJOEmUWL/g2S854UIvlXsPGWaZOFrKc0sKNeoMURyrPTf7rhDG2I6pwy7jNvK4no9NR KEUo+RhIg3QkVYdFxUGSwogACot3hB2ijFK9CgE4014SnI23PFmVgPqcMYH/v2CTfRQz7IezsSE82 eIUJgdgA==; Received: from shell.armlinux.org.uk ([fd8f:7570:feb6:1:5054:ff:fe00:4ec]:51848) by pandora.armlinux.org.uk with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1sCPg4-0006ct-13; Wed, 29 May 2024 21:13:40 +0100 Received: from linux by shell.armlinux.org.uk with local (Exim 4.94.2) (envelope-from ) id 1sCPg4-0004UO-PS; Wed, 29 May 2024 21:13:40 +0100 Date: Wed, 29 May 2024 21:13:40 +0100 From: "Russell King (Oracle)" To: Andrew Lunn Cc: Sneh Shah , Andrew Halaney , Vinod Koul , Bhupesh Sharma , Alexandre Torgue , Jose Abreu , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Maxime Coquelin , netdev@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, kernel@quicinc.com Subject: Re: [PATCH net-next] net: stmmac: dwmac-qcom-ethqos: Add support for 2.5G SGMII Message-ID: References: <20231218071118.21879-1-quic_snehshah@quicinc.com> <4zbf5fmijxnajk7kygcjrcusf6tdnuzsqqboh23nr6f3rb3c4g@qkfofhq7jmv6> <8b80ab09-8444-4c3d-83b0-c7dbf5e58658@quicinc.com> <8f94489d-5f0e-4166-a14e-4959098a5c80@quicinc.com> <67553944-5d3f-4641-a719-da84554c0a9f@lunn.ch> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <67553944-5d3f-4641-a719-da84554c0a9f@lunn.ch> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240529_131356_665231_55571359 X-CRM114-Status: GOOD ( 16.93 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Wed, May 29, 2024 at 04:28:16PM +0200, Andrew Lunn wrote: > > Qualcomm ethernet HW supports 2.5G speed in overclocked SGMII mode. > > we internally term it as OCSGMII. > > So it still does SGMII inband signalling? Not 2500BaseX signalling? It > is not actually compatible with 2500BaseX? > > > End goal of these patches is to enable SGMII with 2.5G speed support. > > The patch in these series enabled up SGMII with 2.5 for cases where we > > don't have external phy. ( mac-to-mac connectivity) > > So the other end needs to be an over clocked SGMII MAC, not 2500BaseX? > > > The new patch posted extends this for the case when the MAC has an > > external phy connected. ( hence we are advertising fr 2.5G speed by adding > > 2500BASEX as supported interface in phylink) > > And i assume it does not actually work against a true 2500BaseX > device, because it is doing SGMII inband signalling? I really hope the hardware isn't using any SGMII inband signalling at 2.5G speeds. Other devices explicitly state that SGMII inband signalling while operating the elevated 2.5G speed is *not* supported! -- RMK's Patch system: https://www.armlinux.org.uk/developer/patches/ FTTP is here! 80Mbps down 10Mbps up. Decent connectivity at last! _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel