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=-5.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS autolearn=ham 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 2AA9AC433FF for ; Mon, 29 Jul 2019 07:45:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 05B19206E0 for ; Mon, 29 Jul 2019 07:45:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726690AbfG2HpG (ORCPT ); Mon, 29 Jul 2019 03:45:06 -0400 Received: from mail-wr1-f65.google.com ([209.85.221.65]:46759 "EHLO mail-wr1-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726862AbfG2HpG (ORCPT ); Mon, 29 Jul 2019 03:45:06 -0400 Received: by mail-wr1-f65.google.com with SMTP id z1so60624423wru.13; Mon, 29 Jul 2019 00:45:04 -0700 (PDT) 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; bh=XXRHBEMKhef+dnocaNK4nkJJjQSEielvNAr/Iguh9Kg=; b=oj40/0/KeLwQngxHjPl2GoeOyasY3k7BCnHrmr3Sg/BR/L9Pn+tnb6MZHyqdaTR2Xz sh8XQte4Y6FJ2p5FU+mKAsbI1I+yS4xg7R3qVq7Hw1eGuCCAnWNMbfHjHcmp6IxW5i5U ReiTOLdqhbIPAFgvqT/5Esc3bG6tj/4apRNW920+iPQFDx7W+L0+nfvLIdvzZKQaQcn/ dQHkiUTx7/qnyi4GrdcVakTdK96pb3g/zJ/6STxIH7bRHZxdyYe5Z3VhJC8g27af9s3a kBxStTDWN5cxOvhcmooP4hDgZE8+cAsoh2l+CAdlUCmvsALS7P49GbO7hYTxHPYwkmub YMSw== X-Gm-Message-State: APjAAAV2ijiWPjDqF4ZLWIKB/g7CKB65nMqWGez+WO83z9zrF7uZN4fR 33/FIGKu5ruSHRfydIbmFF1v1Stz0S+5K2f1iFw= X-Google-Smtp-Source: APXvYqwpm/kijAIS8KFK2eMwQFo1bfr/p+cl9hcwaGna32JrVH4wttc50iYtIsPYz0ZfUBOIYS+MgRm8MWsiqonq7NU= X-Received: by 2002:adf:f08f:: with SMTP id n15mr34464237wro.213.1564386304195; Mon, 29 Jul 2019 00:45:04 -0700 (PDT) MIME-Version: 1.0 References: <1547808474-19427-1-git-send-email-uli+renesas@fpond.eu> <1547808474-19427-3-git-send-email-uli+renesas@fpond.eu> <20190726091325.GA13111@vmlxhi-102.adit-jv.com> <20190726094724.GA14913@vmlxhi-102.adit-jv.com> In-Reply-To: <20190726094724.GA14913@vmlxhi-102.adit-jv.com> From: Geert Uytterhoeven Date: Mon, 29 Jul 2019 09:44:52 +0200 Message-ID: Subject: Re: [PATCH v2 2/5] arm64: dts: r8a7795: Add cpuidle support for CA53 cores To: Eugeniu Rosca Cc: Ulrich Hecht , "horms@verge.net.au" , "khiem.nguyen.xt@renesas.com" , "dien.pham.ry@renesas.com" , "takeshi.kihara.df@renesas.com" , Kuninori Morimoto , "linux-renesas-soc@vger.kernel.org" , "Wischer, Timo (ADITG/ESM)" , "Maik.Scholz@de.bosch.com" , "Dirk.Behme@de.bosch.com" , Eugeniu Rosca , Lorenzo Pieralisi , Daniel Lezcano , Linux PM list , Linux ARM Content-Type: text/plain; charset="UTF-8" Sender: linux-renesas-soc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-renesas-soc@vger.kernel.org Hi Eugniu, CC cpuidle people On Fri, Jul 26, 2019 at 11:47 AM Eugeniu Rosca wrote: > On Fri, Jul 26, 2019 at 11:13:29AM +0200, Rosca, Eugeniu (ADITG/ESM1) wrote: > [..] > > The culprit BSP commits are: > > https://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas-bsp.git/commit/?id=3c3b44c752c4ee > > https://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas-bsp.git/commit/?id=902ff7caa32dc71c > > > > Further narrowing it down, it turns out the CA57 cpuidle support is > > not responsible for generating the issue. It's all about the CA53 idle > > enablement. The reference target is H3-ES2.0-Salvator-X (the problem > > originally emerged on M3-based customer HW). > [..] > > Small amendment to the above (based on vanilla testing): > > Version Issue reproduced? > (H3-ES2.0-Salvator-X) > v5.3-rc1-96-g6789f873ed37 No > v5.3-rc1-96-g6789f873ed37 + [1] No > v5.3-rc1-96-g6789f873ed37 + [2] No > v5.3-rc1-96-g6789f873ed37 + [1] + [2] Yes > > [1] https://patchwork.kernel.org/patch/10769701/ > ("[v2,1/5] arm64: dts: r8a7795: Add cpuidle support for CA57 cores") > > [2] https://patchwork.kernel.org/patch/10769689/ > ("[v2,2/5] arm64: dts: r8a7795: Add cpuidle support for CA53 cores") Thanks for your report and investigation! Unfortunately your original report didn't make it to lore.kernel.org, and probably also not to the list, due to the large audio attachment. For the newly CCed people, the issue is about consistent dropouts during audio playback using an in-house application, introduced by adding cpuidle support to _both_ the big and LITTLE cores. Thanks! Gr{oetje,eeting}s, Geert -- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds