linux-kernel - Re: [PATCH v14 00/18] media: rockchip: add a driver for the rockchip camera interface

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Message-ID: <074cd08e-0412-49f9-8dd9-b1f96eb11717@collabora.com>
Date: Fri, 7 Nov 2025 19:41:59 +0100
From: Michael Riesch <michael.riesch@...labora.com>
To: Sakari Ailus <sakari.ailus@...ux.intel.com>
Cc: Mehdi Djait <mehdi.djait@...ux.intel.com>,
 Maxime Chevallier <maxime.chevallier@...tlin.com>,
 Théo Lebrun <theo.lebrun@...tlin.com>,
 Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
 Gerald Loacker <gerald.loacker@...fvision.net>,
 Bryan O'Donoghue <bryan.odonoghue@...aro.org>,
 Markus Elfring <Markus.Elfring@....de>,
 Laurent Pinchart <laurent.pinchart@...asonboard.com>,
 Mauro Carvalho Chehab <mchehab@...nel.org>, Rob Herring
 <robh+dt@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
 Conor Dooley <conor+dt@...nel.org>, Heiko Stuebner <heiko@...ech.de>,
 Kever Yang <kever.yang@...k-chips.com>,
 Nicolas Dufresne <nicolas.dufresne@...labora.com>,
 Sebastian Reichel <sebastian.reichel@...labora.com>,
 Collabora Kernel Team <kernel@...labora.com>,
 Paul Kocialkowski <paulk@...-base.io>,
 Alexander Shiyan <eagle.alexander923@...il.com>,
 Val Packett <val@...kett.cool>, Rob Herring <robh@...nel.org>,
 Philipp Zabel <p.zabel@...gutronix.de>, linux-media@...r.kernel.org,
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
 linux-arm-kernel@...ts.infradead.org, linux-rockchip@...ts.infradead.org,
 Mehdi Djait <mehdi.djait@...tlin.com>,
 Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
 Bryan O'Donoghue <bod@...nel.org>, Chen-Yu Tsai <wens@...e.org>
Subject: Re: [PATCH v14 00/18] media: rockchip: add a driver for the rockchip
 camera interface

Hi Sakari,

On 11/7/25 18:32, Sakari Ailus wrote:
> Hi Michael,
> 
> On Fri, Oct 24, 2025 at 02:51:29PM +0200, Michael Riesch via B4 Relay wrote:
>> Habidere,
>>
>> This series introduces support for the Rockchip Camera Interface (CIF),
>> which is featured in many Rockchip SoCs in different variations.
>> For example, the PX30 Video Input Processor (VIP) is able to receive
>> video data via the Digital Video Port (DVP, a parallel data interface)
>> and transfer it into system memory using a double-buffering mechanism
>> called ping-pong mode.
>> The RK3568 Video Capture (VICAP) unit, on the other hand, features a
>> DVP and a MIPI CSI-2 receiver that can receive video data independently
>> (both using the ping-pong scheme).
>> The different variants may have additional features, such as scaling
>> and/or cropping.
>> Finally, the RK3588 VICAP unit constitutes an essential piece of the
>> camera interface with one DVP, six MIPI CSI-2 receivers, scale/crop
>> units, and a data path multiplexer (to scaler units, to ISP, ...).
> 
> I understand both RK3568 and RK3588 include an ISP. Do you have insight on
> how would this work, should the support for the ISP be added later on?
> 

Short answer: Yes and yes.

Long answer:

The patch series at hand adds support for the PX30 VIP and the RK3568
VICAP. I cannot really say something about the PX30, but on the RK3568
VICAP and ISP are orthogonal (the ISP features its own MIPI CSI-2
receiver, different from that introduced in this series). Thus, ISP
support can be introduced anytime (whenever someone is motivated ;-)).

Once this patch series is merged, I'll push out changes that introduce
support for the RK3588 VICAP. We can discuss the integration of any
RK3588 ISP in this scope then -- and there may be some things to discuss
as there the VICAP and the ISP(s) are directly connected by means of a
MUX unit in the VICAP.

Alright?

Best regards,
Michael