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 X-Spam-Level: X-Spam-Status: No, score=-5.3 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE, SPF_PASS,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 557B5C433B4 for ; Thu, 6 May 2021 08:09:42 +0000 (UTC) Received: from lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 95EDB613B5 for ; Thu, 6 May 2021 08:09:41 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 95EDB613B5 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=csgroup.eu Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4FbR7m212Rz3bsy for ; Thu, 6 May 2021 18:09:40 +1000 (AEST) Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=csgroup.eu (client-ip=93.17.235.10; helo=pegase2.c-s.fr; envelope-from=christophe.leroy@csgroup.eu; receiver=) Received: from pegase2.c-s.fr (pegase2.c-s.fr [93.17.235.10]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4FbR7H32WJz304R for ; Thu, 6 May 2021 18:09:11 +1000 (AEST) Received: from localhost (mailhub3.si.c-s.fr [172.26.127.67]) by localhost (Postfix) with ESMTP id 4FbR784Hqpz9sTC; Thu, 6 May 2021 10:09:08 +0200 (CEST) X-Virus-Scanned: amavisd-new at c-s.fr Received: from pegase2.c-s.fr ([172.26.127.65]) by localhost (pegase2.c-s.fr [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id lAZD1k47T6gl; Thu, 6 May 2021 10:09:08 +0200 (CEST) Received: from messagerie.si.c-s.fr (messagerie.si.c-s.fr [192.168.25.192]) by pegase2.c-s.fr (Postfix) with ESMTP id 4FbR783HTCz9sSD; Thu, 6 May 2021 10:09:08 +0200 (CEST) Received: from localhost (localhost [127.0.0.1]) by messagerie.si.c-s.fr (Postfix) with ESMTP id 378D98B7F6; Thu, 6 May 2021 10:09:08 +0200 (CEST) X-Virus-Scanned: amavisd-new at c-s.fr Received: from messagerie.si.c-s.fr ([127.0.0.1]) by localhost (messagerie.si.c-s.fr [127.0.0.1]) (amavisd-new, port 10023) with ESMTP id sp9gSccG3Nsj; Thu, 6 May 2021 10:09:08 +0200 (CEST) Received: from [192.168.4.90] (unknown [192.168.4.90]) by messagerie.si.c-s.fr (Postfix) with ESMTP id B31138B7EC; Thu, 6 May 2021 10:09:07 +0200 (CEST) Subject: Re: [FSL P50x0] Xorg always restarts again and again after the the PowerPC updates 5.13-1 To: Christian Zigotzky References:

From: Christophe Leroy Message-ID: <1b0134d4-4235-b294-8112-dcd5468564bf@csgroup.eu> Date: Thu, 6 May 2021 10:09:06 +0200 User-Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:78.0) Gecko/20100101 Thunderbird/78.10.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: fr Content-Transfer-Encoding: 8bit X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Darren Stevens , "R.T.Dickinson" , mad skateman , linuxppc-dev , Christian Zigotzky Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" Hi, Le 06/05/2021 à 09:56, Christian Zigotzky a écrit : > Hi Christophe, > > Ok, so let's summarise from my side. > > The issue is in the PowerPC updates 5.13-1. I reverted these and after that the issue is gone. > We know that only BookE machines are affected. Book3S machines are working with the PowerPC updates. > I think it’s not directly an Xorg issue. It’s more a symptom that Xorg restarts again and again. In my point of view the changes for BookE machines in the PowerPC updates are responsible for this issue. > Bisecting costs a lot of time and I don’t have time for my main work anymore. > Bisecting is good but sometime you have to check your code yourself. We know all facts and now it’s time to check the code because of BookE compatibility. > > @All > You can test it with QEMU as well. I provide some virtual machines and kernels for testing. Guys, it is really important that you test your changes before you release them. > So, summary from my side: You popped up telling that commit 887f3ceb51cd was the reason of your problem. As I am the one who released that commit, I took a look, and identified that 525642624783 should have fixed it. You are working with a 64 bits kernel. My domain is 32 bits kernels. I have no problem at all with corenet64_smp_defconfig booting QEMU with any of the commits you pointed. On my side QEMU doesn't work at all with the configuration you provided, I don't get any output at all on the screen. So how can we progress ? I know bisecting is not always easy, and for sure you must have spend a lot of time with all those skipped steps. But it provided us good information anyway and I'm sure we could progress quickly if you can do the few tests I suggested in my last email: - Can you check that 887f3ceb51cd with cherry-picked 525642624783 has Xorg working ? - Can you bisect between 887f3ceb51cd[good] and 56bec2f9d4d0[bad] to identify first bad commit that stops after loading the dtb and uImage ? - Once that first bad commit is identified, can you check whether the preceeding commit with cherry-picked 525642624783 has Xorg working or not ? Thanks Christophe