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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C7D7CC433FE for ; Wed, 6 Oct 2021 00:10:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id AD70261175 for ; Wed, 6 Oct 2021 00:10:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237016AbhJFAMN (ORCPT ); Tue, 5 Oct 2021 20:12:13 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39842 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230188AbhJFAMM (ORCPT ); Tue, 5 Oct 2021 20:12:12 -0400 Received: from mail-yb1-xb36.google.com (mail-yb1-xb36.google.com [IPv6:2607:f8b0:4864:20::b36]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D2D7EC061749 for ; Tue, 5 Oct 2021 17:10:20 -0700 (PDT) Received: by mail-yb1-xb36.google.com with SMTP id v195so1562912ybb.0 for ; Tue, 05 Oct 2021 17:10:20 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc:content-transfer-encoding; bh=MzUhgXDxneM6K2IKWvz5CMtwEL90xumlqayJyxLdrxY=; b=Q94zXviMhYGqkMmQkJlho1KH6VSaBrnneKlRup2/QH5Kv+qmOcfsa9JvbSMQT2i+Sd PdmOR7KHFa5HPwAcZXrjapW7J1DTotXM3Exf41BhEGQjlyBJGA5z9GIl4ZCeyMVcxZ5Z RbFvrIk9fNvJCl1nf8OQz84/aUFle+29NG/NuukC+bfpeLBhYhLCpY3XXGPxYXnvPdN4 Z8TY9yDZ/ziklsUlkPqozvb8mnHbGy3P+gc45dlUQEJDONFSGEYJE0WeJd5g7+IBZE4z d878GU5Df4ycGUd2fvra3r0JvtsdvsnJEWJS/jzocRB5x5/wny1nqT0imvtA66Yen3ij s1Hw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc:content-transfer-encoding; bh=MzUhgXDxneM6K2IKWvz5CMtwEL90xumlqayJyxLdrxY=; b=hwnYnv9qza1kVUhrtnHU4bxKTVio2mySAKlAL98sCZ/QBiyCSihI+U6f2jaXfHvV1R Y5bbi/uvN8ewFxvlIFyPJl+G+wNw3IejbwfvvipX+QAA2/jn7+wKFvSg8+vmZJTrKLaV 9iR+aFW8eBer99sRuFdblAZeXcee6wGjwhI5IYOA2pgLe0amVTX3xRWPiAC/Ruc96vBu yHgtKc9QGDmHHHGZrU8YpwA1GWWsYWfNTobL6ud67grTLBfRgVxrLdZw1QvK3t38cKXU 1XclBWGg+DneQL4Q+ROSICcYGgJ3trDxv9kwGyftUYPDm3NM5pjRGA9EpYPdRaw1mH5E uuWw== X-Gm-Message-State: AOAM532vt/+dnRoY0v2ZZs91jVp5lIzsYy+zTIB+ZgmHdk0rsLIyMUEU 4NWf9AFNc4ccA7dfldO3Ue0+uaB3RwDGGJ+BAebm7Q== X-Google-Smtp-Source: ABdhPJxAx+DmOAm2qwtR55Fg/JzgGWFLp1UkXv6faIIu08RFE/VbpEep7GKTqYuNpLTrN7M6g2LEPFRJdxmXOW6BG5k= X-Received: by 2002:a5b:783:: with SMTP id b3mr24798040ybq.328.1633479019867; Tue, 05 Oct 2021 17:10:19 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: Saravana Kannan Date: Tue, 5 Oct 2021 17:09:44 -0700 Message-ID: Subject: Re: v5.15-rcX regression: video devices on i.MX6 are not created To: =?UTF-8?Q?Krzysztof_Ha=C5=82asa?= Cc: Rob Herring , Frank Rowand , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Oct 4, 2021 at 5:19 AM Krzysztof Ha=C5=82asa wrot= e: > > Hi Saravana et al., > > FYI the patch: 6b2117ad65f1bca9ece6d4b1ee784b42701a2d86 > > of: property: fw_devlink: Add support for "resets" and "pwms" > > Allows better tracking of dependencies between devices. > > drivers/of/property.c | 4 ++++ > > breaks v4l2 video devices on an i.MX6 CPU. The /dev/video* nodes are not > created, and the drivers (async subdevicess) are "waiting": > > # cat /sys/kernel/debug/v4l2-async/pending_async_subdevices > > imx-media: > [fwnode] dev=3Dnil, node=3D/soc/ipu@2400000/port@0 > [fwnode] dev=3Dnil, node=3D/soc/ipu@2400000/port@1 > [fwnode] dev=3Dnil, node=3D/soc/ipu@2800000/port@0 > [fwnode] dev=3Dnil, node=3D/soc/ipu@2800000/port@1 > imx6-mipi-csi2: > [fwnode] dev=3D0-0036, node=3D/soc/bus@2100000/i2c@21a0000/camera@36 > ipu2_csi1_mux: > ipu1_csi0_mux: > [fwnode] dev=3D21dc000.mipi, node=3D/soc/bus@2100000/mipi@21dc000 > > Reverting the patch (or commenting the "resets" out) fixes the problem: > > # cat /sys/kernel/debug/v4l2-async/pending_async_subdevices > ipu2_csi1: > ipu2_csi0: > ipu1_csi1: > ipu1_csi0: > imx-media: > imx6-mipi-csi2: > ipu2_csi1_mux: > ipu1_csi0_mux: > > > What now? Hi Krzysztof, Can you give me the following details? 1. The dts file that corresponds to the device you are testing this on. 2. Output of /devices_deferred base on at least 5.15-rc4 (I added more info there recently). That should tell me all the info I need to debug this. In the end it'll essentially boil down to a reset controller driver not using device driver model to initialize the device and directly parsing the node in some kind of initcall. Thanks, Saravana > -- > Krzysztof "Chris" Ha=C5=82asa > > Sie=C4=87 Badawcza =C5=81ukasiewicz > Przemys=C5=82owy Instytut Automatyki i Pomiar=C3=B3w PIAP > Al. Jerozolimskie 202, 02-486 Warszawa