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[23.128.96.18]) by mx.google.com with ESMTP id a6si4018382ejy.11.2020.05.12.01.59.11; Tue, 12 May 2020 01:59:34 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729334AbgELIym (ORCPT + 99 others); Tue, 12 May 2020 04:54:42 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41872 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1729047AbgELIyl (ORCPT ); Tue, 12 May 2020 04:54:41 -0400 Received: from metis.ext.pengutronix.de (metis.ext.pengutronix.de [IPv6:2001:67c:670:201:290:27ff:fe1d:cc33]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BBF22C061A0C for ; Tue, 12 May 2020 01:54:41 -0700 (PDT) Received: from pty.hi.pengutronix.de ([2001:67c:670:100:1d::c5]) by metis.ext.pengutronix.de with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1jYQgN-0000M7-Ka; Tue, 12 May 2020 10:54:35 +0200 Received: from rsc by pty.hi.pengutronix.de with local (Exim 4.89) (envelope-from ) id 1jYQgM-0001lA-4C; Tue, 12 May 2020 10:54:34 +0200 Date: Tue, 12 May 2020 10:54:34 +0200 From: Robert Schwebel To: Oleksij Rempel Cc: Andrew Lunn , "David S. Miller" , Florian Fainelli , Heiner Kallweit , Jakub Kicinski , Jonathan Corbet , Michal Kubecek , David Jander , kernel@pengutronix.de, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, Russell King , mkl@pengutronix.de, Marek Vasut , Christian Herber Subject: Re: signal quality and cable diagnostic Message-ID: <20200512085434.m22zj3i6ehyl34yy@pengutronix.de> References: <20200511141310.GA2543@pengutronix.de> <20200511143337.GC413878@lunn.ch> <20200512082201.GB16536@pengutronix.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200512082201.GB16536@pengutronix.de> X-Sent-From: Pengutronix Hildesheim X-URL: http://www.pengutronix.de/ X-IRC: #ptxdist @freenode X-Accept-Language: de,en X-Accept-Content-Type: text/plain X-Uptime: 10:53:10 up 179 days, 11 min, 187 users, load average: 0,02, 0,07, 0,06 User-Agent: NeoMutt/20170113 (1.7.2) X-SA-Exim-Connect-IP: 2001:67c:670:100:1d::c5 X-SA-Exim-Mail-From: rsc@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-kernel@vger.kernel.org Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, May 12, 2020 at 10:22:01AM +0200, Oleksij Rempel wrote: > > Pair A: OK > > Pair A: Signal Quality Index class D > > At least for automotive, avionics, (rockets till it is deployed :D) > etc... the cable integrity will probably not change, except we have some > sudden water infiltration into the cable, etc :) As some of our applications are running on agricultural equipment, water in the cable is not completely implausible :-) rsc -- Pengutronix e.K. | Dipl.-Ing. Robert Schwebel | Steuerwalder Str. 21 | https://www.pengutronix.de/ | 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-9 |