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;
Date:   Tue, 22 Sep 2020 11:47:47 +0300
From:   Sakari Ailus <sakari.ailus@iki.fi>
To:     Luca Ceresoli <luca@lucaceresoli.net>
Cc:     Sowjanya Komatineni <skomatineni@nvidia.com>,
        thierry.reding@gmail.com, jonathanh@nvidia.com, hverkuil@xs4all.nl,
        jacopo+renesas@jmondi.org, leonl@leopardimaging.com,
        robh+dt@kernel.org, lgirdwood@gmail.com, broonie@kernel.org,
        linux-media@vger.kernel.org, devicetree@vger.kernel.org,
        linux-kernel@vger.kernel.org
Subject: Re: [PATCH v6 2/3] media: i2c: imx274: Remove stop stream i2c writes
 during remove
Message-ID: <20200922084746.GA8644@valkosipuli.retiisi.org.uk>
References: <1600724379-7324-1-git-send-email-skomatineni@nvidia.com>
 <1600724379-7324-3-git-send-email-skomatineni@nvidia.com>
 <d6be54a7-76b8-4206-0d76-6f93ec545e72@lucaceresoli.net>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <d6be54a7-76b8-4206-0d76-6f93ec545e72@lucaceresoli.net>
User-Agent: Mutt/1.10.1 (2018-07-13)
Precedence: bulk

Hi Luca,

On Tue, Sep 22, 2020 at 10:09:33AM +0200, Luca Ceresoli wrote:
> 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?

It doesn't. That's however one of the lesser concerns, and I don't think
it'd help if drivers tried to prepare for that.

-- 
Sakari Ailus