Received: by 2002:a05:6a10:22f:0:0:0:0 with SMTP id 15csp3759672pxk; Tue, 22 Sep 2020 01:35:15 -0700 (PDT) X-Google-Smtp-Source: ABdhPJwr3WXoPFsjMrMvpcE9vIGGvficv1Zp89wPVUvNU1rRbe5JmsNa4Zw2S329RMmj6pgCqgp/ X-Received: by 2002:a17:907:118c:: with SMTP id uz12mr3575982ejb.321.1600763715166; Tue, 22 Sep 2020 01:35:15 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1600763715; cv=none; d=google.com; s=arc-20160816; b=0/GS47XiUn2NV2QF9WJp54WTFN1VWj3MmzOqui/D3wjkkLI+KEMCj4qHBYoONRYOaU KlcYnqWiAz1mqvhxe6h1zmG7Ye+VUpdPrv0JyNTkxNVRfidcsj8bN6ypsE4vXA62mwit cRi5Uu/wGrQKWWU2vlZ7HDPVLUhxAe4/a1V/6Ho/9dTlNPchqyGtl28wr7qBvAogsQF5 FvxdirYIX4FgjWYNytTWD/x7nRzp1480HF3RgucD1UJBFIDKh38L16bHyF5NPqn47dWe 89sKMe8+WWmIIZO0hZDsljx2abpVKHegweuxp+j5PhrkvBkgA11QII8sqFovAQ1vrC1Z XRxw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:content-language :in-reply-to:mime-version:user-agent:date:message-id:from:references :cc:to:subject; bh=O/lfQrDpjR04BvPOdM1eb36AnIcBcFmqp/zi2AYDqFU=; b=PMNLDkLgZMMg031QR8GTokaQCV1eZuz0ZL63z84a7qHposumAQuXk58AlIQLFeaGBj bnKyfM26+Mw2h+eE4I3ypJ/V9cK8ddc6oM7LuJWJ0tCYDpQ2ydo2cwAmSf4ZwKXSkCq9 V19G1DhLaMCdmIT9EmGxwgHL+LkydWPKkgkv8yArxGo8qK4XXVaqUGHx3RCmqvXXeZIr eGtziwmLUVyH6lO9E9KEQktMHcxgE1YK4OMA43OdCuavQ6PoobnDvWqr8h+8HGR2x1BE MZ8YTYPLFKd3pm7TTdGigkRtBtuD/JpA28TRehmoLv71MLllKFK8StWUX2kiwoyilW4X /T4A== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id y39si10960847ede.275.2020.09.22.01.34.51; Tue, 22 Sep 2020 01:35:15 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726588AbgIVIJj (ORCPT + 99 others); Tue, 22 Sep 2020 04:09:39 -0400 Received: from hostingweb31-40.netsons.net ([89.40.174.40]:55952 "EHLO hostingweb31-40.netsons.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726489AbgIVIJj (ORCPT ); Tue, 22 Sep 2020 04:09:39 -0400 X-Greylist: delayed 380 seconds by postgrey-1.27 at vger.kernel.org; Tue, 22 Sep 2020 04:09:38 EDT Received: from [77.244.183.192] (port=61948 helo=[192.168.178.24]) by hostingweb31.netsons.net with esmtpsa (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 (Exim 4.93) (envelope-from ) id 1kKdMl-0005k7-KL; Tue, 22 Sep 2020 10:09:35 +0200 Subject: Re: [PATCH v6 2/3] media: i2c: imx274: Remove stop stream i2c writes during remove To: Sowjanya Komatineni , thierry.reding@gmail.com, jonathanh@nvidia.com, sakari.ailus@iki.fi, hverkuil@xs4all.nl, jacopo+renesas@jmondi.org, leonl@leopardimaging.com, robh+dt@kernel.org, lgirdwood@gmail.com, broonie@kernel.org Cc: linux-media@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org References: <1600724379-7324-1-git-send-email-skomatineni@nvidia.com> <1600724379-7324-3-git-send-email-skomatineni@nvidia.com> From: Luca Ceresoli Message-ID: Date: Tue, 22 Sep 2020 10:09:33 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: <1600724379-7324-3-git-send-email-skomatineni@nvidia.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - hostingweb31.netsons.net X-AntiAbuse: Original Domain - vger.kernel.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - lucaceresoli.net X-Get-Message-Sender-Via: hostingweb31.netsons.net: authenticated_id: luca@lucaceresoli.net X-Authenticated-Sender: hostingweb31.netsons.net: luca@lucaceresoli.net X-Source: X-Source-Args: X-Source-Dir: Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, On 21/09/20 23:39, Sowjanya Komatineni wrote: > Sensor should already be in standby during remove and there is no > need to configure sensor registers for stream stop. I beg your pardon for the newbie question: does the V4L2 framework guarantee that the stream is stopped (.s_stream(..., 0)) before removing the driver? Thanks, -- Luca