linux-kernel - Re: [PATCH v8 6/6] media: sun6i-csi: Add support for hooking to the isp devices

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Date:   Sun, 06 Nov 2022 10:13:11 +0100
From:   Jernej Škrabec <jernej.skrabec@...il.com>
To:     linux-media@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-sunxi@...ts.linux.dev,
        linux-kernel@...r.kernel.org, linux-staging@...ts.linux.dev,
        Paul Kocialkowski <paul.kocialkowski@...tlin.com>
Cc:     Paul Kocialkowski <paul.kocialkowski@...tlin.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Chen-Yu Tsai <wens@...e.org>,
        Samuel Holland <samuel@...lland.org>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        Hans Verkuil <hans.verkuil@...co.com>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Maxime Ripard <mripard@...nel.org>,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>
Subject: Re: [PATCH v8 6/6] media: sun6i-csi: Add support for hooking to the isp devices

Dne četrtek, 03. november 2022 ob 17:37:17 CET je Paul Kocialkowski 
napisal(a):
> In order to use the isp and csi together, both devices need to be
> parented to the same v4l2 and media devices. We use the isp as
> top-level device and let the csi code hook to its v4l2 and media
> devices when async subdev registration takes place.
> 
> As a result v4l2/media device setup is only called when the ISP
> is missing and the capture device is registered after the devices
> are hooked. The bridge subdev and its notifier are registered
> without any device when the ISP is available. Top-level pointers
> for the devices are introduced to either redirect to the hooked ones
> (isp available) or the registered ones (isp missing).
> 
> Also keep track of whether the capture node was setup or not to
> avoid cleaning up resources when it wasn't.
> 
> Signed-off-by: Paul Kocialkowski <paul.kocialkowski@...tlin.com>

Acked-by: Jernej Skrabec <jernej.skrabec@...il.com>

Best regards,
Jernej