Received: by 2002:a17:90a:37a3:0:0:0:0 with SMTP id v32csp756477pjb; Fri, 21 Jun 2019 08:05:08 -0700 (PDT) X-Google-Smtp-Source: APXvYqwJ7aEFnR+4FKWUD8+V4cRWBbHxAuH9gZF/j+f1IgpCJSJt2ryFd6y9diI4NTVogWXFCUwM X-Received: by 2002:a17:90a:bb94:: with SMTP id v20mr7387740pjr.88.1561129508695; Fri, 21 Jun 2019 08:05:08 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1561129508; cv=none; d=google.com; s=arc-20160816; b=AGF0vAGwXjHA39+flf9f2lVSdjXEmO7u3Fuaj9sVnmSAKGyQy58FeYh64QHi5DkgJR 83gHKjqJiAUWupfPlurxG8ycx4USfyPs08fNZsYha94p5fmk5gGT1rPAvSrPIhcUkzg5 cskned/j6YXZ766rk0TGRo4Wxw0cNK6MjxwAaS5DAq3oPeYMkCcxBXLlmsZSudw02nOP Y8zlCDfBzDFbpaQGYQKqAR5hSl/VyFYb9B6CoU8jM+DPm5o+b5vrOzIqHY9Lyag1uBBZ P5LKWsPMinEhGUdlNKrB2CbRtxfuXq4HVEraflEdlXh9P6GHiztza4U6yMDRNigx7m95 I7Ng== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:content-transfer-encoding:cc:to:subject :message-id:date:from:in-reply-to:references:mime-version :dkim-signature; bh=z7+8itbNjVbWEFVe7Q1gJ/IkKA5Mvml8D7msm2siMus=; b=nRwjepgMXn+hDRdO+Tv/jKv2i7pd2MbEDNrbHm3CXBd2CwqXtSNl2OKkkfY4co+QU3 uFn4Me7NLMEKX/eMTt9ovd01sOMYYr1CWkFFxXt9F0D6mS6V8OuBeHtrTIrhUyftpy2z WDo5QrmSK3uE2BBeet5wWo6ZQ0kCc4mT3x5Omcs/oxDBRnoP6pzjA3inMuodVmb+eja6 GBFNdc6pT43NeZCxbCG3/SMRswG+pGrDcLgIao2x5/4h8xGCEehZ9o1+/niIIEKDLWUb /9tCKISe6jajOzKDaZbMrj5O548r6HRo5xK9cHx/0zyfH/nTJATnTdAIGfLygx8qOVcJ LnHQ== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@gmail.com header.s=20161025 header.b=k21ZM2uD; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id u16si3030132pjb.15.2019.06.21.08.04.51; Fri, 21 Jun 2019 08:05:08 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@gmail.com header.s=20161025 header.b=k21ZM2uD; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726115AbfFUPEk (ORCPT + 99 others); Fri, 21 Jun 2019 11:04:40 -0400 Received: from mail-vs1-f67.google.com ([209.85.217.67]:33749 "EHLO mail-vs1-f67.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726018AbfFUPEk (ORCPT ); Fri, 21 Jun 2019 11:04:40 -0400 Received: by mail-vs1-f67.google.com with SMTP id m8so4037654vsj.0; Fri, 21 Jun 2019 08:04:39 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc:content-transfer-encoding; bh=z7+8itbNjVbWEFVe7Q1gJ/IkKA5Mvml8D7msm2siMus=; b=k21ZM2uDf46eU5l4FsI4bUX5Fz3bLPpM7Y17vqd+3+fdIeMyYxeaM3nak9TyHc6IIQ JhXpvZAe55+ABxcBUIuJFP2KUAjIXPrZq4eIChJlsOqRVHC9jLLT8N3lq0/YtiNymP25 DE4TBZwMQX2zcZR33spJ/eNJRBA91MIi8wBhFJaONCraODhYxVxgpnWWiusKeIVo7C7U 2hFeH6EfajspdHsQ9As2jMSgmISE/0wyMHr4Ti7vuuj/vk9MbvLJ7LyRB/2fdlG3fx1m Ji3CiUE/uFZTrhasxlddJSMjRCxg3Nsf/iwIAaXBt9S6e3R6N1yrJQCIz8P1Neiki3/o P7KA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc:content-transfer-encoding; bh=z7+8itbNjVbWEFVe7Q1gJ/IkKA5Mvml8D7msm2siMus=; b=Mwbk+E4P7l3H5MTXKJuDWcF1ntaTR2L5oJYtMRMyBBvrGxExjWpSlU/52IJcIP79Z/ XmB33geeV0ZyrD4higiBwv2gH4biHFj3Q0GVHnBoazM5EHu5P2N06RwysQED3YaIcEPz 4yX6alHv6ReWKfQMWtiEJ8Jh90P9/3HbAWAAXtt0xG8rvGfci/vSwJ2pvViKGYgbmebf Fk7yjC52NgS99Hbh8h5IBNdPsE3WcCBqjT8YBe5gkziXGkQ7/l3vQfckQhHmxmOxrlye h+hpP+ROkWz0W6a6pZnxrq+PXbkaK67+h9l+XyOMYL+5Upzyd/q1ku5z9NDHEDsOGvOJ Si7w== X-Gm-Message-State: APjAAAWv5UAsI/9A2d++04x7gK5JYUKXCbhN8KbHZUV1Jq99AooaUd4/ BnNr3WtqWrubURGjQs+G8CaJx4RQh4Fns1phJPU= X-Received: by 2002:a67:320c:: with SMTP id y12mr8546999vsy.30.1561129479136; Fri, 21 Jun 2019 08:04:39 -0700 (PDT) MIME-Version: 1.0 References: <20190619150406.GB19346@kroah.com> <22247.1560961607@turing-police> In-Reply-To: <22247.1560961607@turing-police> From: Pintu Agarwal Date: Fri, 21 Jun 2019 20:34:27 +0530 Message-ID: Subject: Re: [IMX] [DRM]: suspend/resume support To: =?UTF-8?Q?Valdis_Kl=C4=93tnieks?= Cc: Greg KH , Fabio Estevam , linux-pm@vger.kernel.org, open list , "moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE" , Kernelnewbies Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Jun 19, 2019 at 9:56 PM Valdis Kl=C4=93tnieks wrote: > > On Wed, 19 Jun 2019 20:47:34 +0530, Pintu Agarwal said: > > > No I mean to say, there are lots of features and customization already > > done on this version and stabilized. > > Upgrading again may require months of effort. > > This is what happens when you don't upstream your local changes. > > And no, saying "But we're a small company and nobody cares" isn't an > excuse - Linux carried the entire Voyager architecture around for several= years > for 2 machines. Not two models, 2 physical machines, the last 2 operation= al > systems of the product line. > > (Not the Xubuntu-based Voyage distribution either - the Voyager was a mid= -80s > SMP fault-tolerant system from NCR with up to 32 486/586 cores and 4G of > memory, which was a honking big system for the day...) > > https://kernel.googlesource.com/pub/scm/linux/kernel/git/rzhang/linux/+/v= 2.6.20-rc1/Documentation/voyager.txt > > The architecture was finally dropped in 2009 when enough hardware failure= s > had happened that James Bottomley was unable to create a bootable > system from the parts from both... > > So if your production run is several thousand systems, that's *plenty* bi= g > enough for patches and drivers (especially since drivers for hardware you > included in your several-thousand system run are also likely applicable t= o > a half dozen other vendors who made several thousand systems using the > same chipset.... Yes, I agree, but unfortunately I don't have any control. I normally keep finding things, which seems interesting for me and propose for upstream (even if it is very small). And, I completely agree that system should be designed such a way that it can be easily up-gradable. But, as I said, its not fully in our hand :( Also, I think this case is slightly different. Here, even if I try with latest kernel, there is no use, since hibernation feature is not fully support for IMX. And I think that is already known. I came here looking for some pointers and help and get some clue to proceed further. If I succeed in making it I will definitely like to contribute upstream :) Thank You! Regards, Pintu