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 7C419C43217 for ; Mon, 17 Oct 2022 17:31:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231128AbiJQRbJ (ORCPT ); Mon, 17 Oct 2022 13:31:09 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51442 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231139AbiJQRay (ORCPT ); Mon, 17 Oct 2022 13:30:54 -0400 Received: from mail-il1-x134.google.com (mail-il1-x134.google.com [IPv6:2607:f8b0:4864:20::134]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4FF466553; Mon, 17 Oct 2022 10:30:40 -0700 (PDT) Received: by mail-il1-x134.google.com with SMTP id q11so6172701ilj.10; Mon, 17 Oct 2022 10:30:40 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:cc:to:subject:message-id:date:from :in-reply-to:references:mime-version:from:to:cc:subject:date :message-id:reply-to; bh=/8q4ui2I0PbkckThln1KL8S7Gv3bNjUbhV3T4UKkFUc=; b=LWQhQijW/K3QGTtSbzZcPYA000ASjJ1kn+xVcuG8p9zwsP53ifcj9jWnJ+S/JIIb5n MscYqdmx/56bCG9Lya7D9ZHNdRKg97dKEkxXYCS6ljMupabbP8nr3e7vyLTCfZFG5I01 77YlPFIyARGCSnU6HrpwYpT3eh1WD9plur8N01+VK5fYIO7k3N9rhRpNq3tvXdgZDKm4 H+svTlfD/f4ONxoRNOWK5anXeGD8u/uJWL7s6I8+AU61DPqH0Ela/mlkU9jfr5xbcfk9 iulIzAhImVHe+Hu+xbti8GNqlpiAqEMYM5bpAae/wwVbucnmOoZqFN4dxUQFvXbUwF+d QnQw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:cc:to:subject:message-id:date:from :in-reply-to:references:mime-version:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=/8q4ui2I0PbkckThln1KL8S7Gv3bNjUbhV3T4UKkFUc=; b=PTmRQmwztklPSngdsmTnDzf6dMN53vLsS/tIL16+qlqA4yW7u3d1LZjDnsx74HCiJX MzzIM8En80+3YdYUzrJMsUZ7V+CBlhaNbPREhqYyT0cGmXUPHCdrqYy+8/py09Vn7BPD d6YK8ORBKdrqUMAS6WT6EQ6KczKM1hlSkGtMWHSpH8vK625nsU37PdAPBo/z++AyVa7a gwmoyJJBNj2ydkKE4hfHXyy8fFVg8BddDJp4/df5turkOjBw9NubR1DOHtFJGbFKecnt 4GakYA9xDU2vSgQy/GaX91Hz++CCM/YljyykPVXwsgCZQTW4B+wHGk5RyhF/6GBT8IZ0 dA1w== X-Gm-Message-State: ACrzQf04iiEDEGLPPLPNnJpFpKSQ++AbSXSZ8h0I5DAWZ290csVrBrAD d12uw/jxGBeGTntik7zrIH6QYdg083aGTqqZHtY= X-Google-Smtp-Source: AMsMyM4CrTJ6ZDzgjAcivdZiwngBUcCRna8HIl3nfrbF+OemFiWRHT+jPO25/qV6JOQykn/PXkrq60j+ldVtvrx/LGg= X-Received: by 2002:a05:6e02:13ca:b0:2fa:3064:2a81 with SMTP id v10-20020a056e0213ca00b002fa30642a81mr5123803ilj.19.1666027778867; Mon, 17 Oct 2022 10:29:38 -0700 (PDT) MIME-Version: 1.0 References: <20221016151256.3021729-1-lis8215@gmail.com> <20221016151256.3021729-3-lis8215@gmail.com> <895WJR.03DS0G5N9R0V1@crapouillou.net> In-Reply-To: <895WJR.03DS0G5N9R0V1@crapouillou.net> From: Siarhei Volkau Date: Mon, 17 Oct 2022 20:29:27 +0300 Message-ID: Subject: Re: [PATCH v2 2/2] dmaengine: JZ4780: Add support for the JZ4755. To: Paul Cercueil Cc: Vinod Koul , Rob Herring , Krzysztof Kozlowski , dmaengine@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mips@vger.kernel.org Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org =D0=BF=D0=BD, 17 =D0=BE=D0=BA=D1=82. 2022 =D0=B3. =D0=B2 12:34, Paul Cercue= il : > Can you verify that? > > It should be pretty simple, if it has the bug you'll see I/O errors on > the SD card. Well, the result is ambiguous: Without that 'broken' flag: mmc works poorly, but becomes more or less stable when MMC clock downs to 6MHz (90% boots without errors). On the 12MHz MMC clock the issue doesn't appear in 50-70% cases. On the 24MHz MMC clock the device never boots up. However with the flag: MMC works stable on 24MHz MMC clock (boot issue observed only once), but if I increase MMC clock speed even a bit the problem appears oftenly ( >70% of cases). So, that flag definitely helps a lot, but the nature of the problem might b= e different. BR, Siarhei