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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id CDBFCC6FD1C for ; Wed, 22 Mar 2023 04:20:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229754AbjCVETq (ORCPT ); Wed, 22 Mar 2023 00:19:46 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43926 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229738AbjCVETo (ORCPT ); Wed, 22 Mar 2023 00:19:44 -0400 Received: from mail-pl1-x62e.google.com (mail-pl1-x62e.google.com [IPv6:2607:f8b0:4864:20::62e]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 56C8A570BA; Tue, 21 Mar 2023 21:19:43 -0700 (PDT) Received: by mail-pl1-x62e.google.com with SMTP id bc12so17584308plb.0; Tue, 21 Mar 2023 21:19:43 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; t=1679458783; x=1682050783; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:from:to:cc:subject:date:message-id:reply-to; bh=F6PaN8bq5XqNt//+gDdH/EjNZE6f5FyGQiHw8QB10Fk=; b=YeDmt6o77jyo/E07AuCw2ctK4ASL3TF0OMhnqpK3epCAWrZYfS/UP+YPpTWGm71dse 2g7BrwdgLz9a/ZKZG9fe5pszctFGfc54eNT4mqnVkkiIb/CJvLHqZP1WWhxYzgC73Vs4 h6nARBLlo9m0d2fQnhkZeBEV6Vl1/lfz269MXzdHhBbICKv90yQpKVS5iXBiOEGH35mQ slYMnvI1WESCBmzduzryc0jPmFvPjCv2QhSfLd5dXwzTW6qtrFT30yGuV+noxjZIOw2c zTxyoamQfKnYUlRkdvXWODMzmcDRiqTqC471bCjHD3wWUmzOaHFcihUcbJCoiihXwuM+ WZqQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; t=1679458783; x=1682050783; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=F6PaN8bq5XqNt//+gDdH/EjNZE6f5FyGQiHw8QB10Fk=; b=zNpESFSv+7NYUCMgZ6WZSUh+aYqtHuYDz53TqDFQYRW4M0ORKnwuygT8yh+jpZufan kM8YMXhCPGQsruikvuM039cwBmt0uMWBlkY1MNJ8LolCzQuwRQUA4RGmZMgnspYekJ/A C8HxQQI3PinsYKNMcfEjqw9JgZ/Bj5SZaC5p3GyJEqdBTrWZ6e2Nlgwe+wvYsn76tX8p fX2LL1c41S+HNcK6FYWaYi9Lqcc1NG9e7Bux27LzNXO0HUA7ShQ10BjHVt8mf4ck9pGi dojzln/D46FbMXrKUwOcyQw44tcMQSwv6DqVd455ZPQljCIkXFukEe7ush1P6S7WTjhM ECGw== X-Gm-Message-State: AO0yUKX8TVeIhRYKftPcrKE18JBEcfMfINAk1WQg2i4HlklptdwoSnag rW/mRBcO78yHOnr8RjQ1RF4= X-Google-Smtp-Source: AK7set95VhyeXVHUSXumU94QggbrKVSUulUlNsegINxlRgAiQM3VSWm0RleO250lfPGcswA+Kn1vEg== X-Received: by 2002:a05:6a21:78a9:b0:d9:d1e6:82ac with SMTP id bf41-20020a056a2178a900b000d9d1e682acmr5250903pzc.5.1679458782789; Tue, 21 Mar 2023 21:19:42 -0700 (PDT) Received: from hoboy.vegasvil.org ([2601:640:8200:33:e2d5:5eff:fea5:802f]) by smtp.gmail.com with ESMTPSA id u20-20020aa78494000000b005d296facfa3sm9067706pfn.36.2023.03.21.21.19.41 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 21 Mar 2023 21:19:42 -0700 (PDT) Date: Tue, 21 Mar 2023 21:19:39 -0700 From: Richard Cochran To: Siddharth Vadapalli Cc: davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, rogerq@kernel.org, jacob.e.keller@intel.com, leon@kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, srk@ti.com Subject: Re: [PATCH net-next] net: ethernet: ti: am65-cpts: adjust estf following ptp changes Message-ID: References: <20230321062600.2539544-1-s-vadapalli@ti.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20230321062600.2539544-1-s-vadapalli@ti.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Mar 21, 2023 at 11:56:00AM +0530, Siddharth Vadapalli wrote: > From: Grygorii Strashko > > When the CPTS clock is synced/adjusted by running linuxptp (ptp4l/phc2sys), > it will cause the TSN EST schedule to drift away over time. This is because > the schedule is driven by the EstF periodic counter whose pulse length is > defined in ref_clk cycles and it does not automatically sync to CPTS clock. > _______ > _| > ^ > expected cycle start time boundary > _______________ > _|_|___|_| > ^ > EstF drifted away -> direction > > To fix it, the same PPM adjustment has to be applied to EstF as done to the > PHC CPTS clock, in order to correct the TSN EST cycle length and keep them > in sync. > > Drifted cycle: > AM65_CPTS_EVT: 7 e1:01770001 e2:000000ff t:1635968230373377017 > AM65_CPTS_EVT: 7 e1:01770001 e2:000000ff t:1635968230373877017 > AM65_CPTS_EVT: 7 e1:01770001 e2:000000ff t:1635968230374377017 > AM65_CPTS_EVT: 7 e1:01770001 e2:000000ff t:1635968230374877017 > AM65_CPTS_EVT: 7 e1:01770001 e2:000000ff t:1635968230375377017 > AM65_CPTS_EVT: 7 e1:01770001 e2:000000ff t:1635968230375877023 > AM65_CPTS_EVT: 7 e1:01770001 e2:000000ff t:1635968230376377018 > AM65_CPTS_EVT: 7 e1:01770001 e2:000000ff t:1635968230376877018 > AM65_CPTS_EVT: 7 e1:01770001 e2:000000ff t:1635968230377377018 > > Stable cycle: > AM65_CPTS_EVT: 7 e1:01770001 e2:000000ff t:1635966863193375473 > AM65_CPTS_EVT: 7 e1:01770001 e2:000000ff t:1635966863193875473 > AM65_CPTS_EVT: 7 e1:01770001 e2:000000ff t:1635966863194375473 > AM65_CPTS_EVT: 7 e1:01770001 e2:000000ff t:1635966863194875473 > AM65_CPTS_EVT: 7 e1:01770001 e2:000000ff t:1635966863195375473 > AM65_CPTS_EVT: 7 e1:01770001 e2:000000ff t:1635966863195875473 > AM65_CPTS_EVT: 7 e1:01770001 e2:000000ff t:1635966863196375473 > > Signed-off-by: Grygorii Strashko > Signed-off-by: Siddharth Vadapalli Acked-by: Richard Cochran