linux-kernel - Re: [PATCH v2 04/12] arm64: dts: fsd: Add CSI nodes

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Message-ID: <20250826114357.GA607@pendragon.ideasonboard.com>
Date: Tue, 26 Aug 2025 13:43:57 +0200
From: Laurent Pinchart <laurent.pinchart@...asonboard.com>
To: Krzysztof Kozlowski <krzk@...nel.org>
Cc: Inbaraj E <inbaraj.e@...sung.com>, mturquette@...libre.com,
	sboyd@...nel.org, robh@...nel.org, krzk+dt@...nel.org,
	conor+dt@...nel.org, s.nawrocki@...sung.com, s.hauer@...gutronix.de,
	shawnguo@...nel.org, cw00.choi@...sung.com, rmfrfs@...il.com,
	martink@...teo.de, mchehab@...nel.org, linux-fsd@...la.com,
	will@...nel.org, catalin.marinas@....com, pankaj.dubey@...sung.com,
	shradha.t@...sung.com, ravi.patel@...sung.com,
	linux-clk@...r.kernel.org, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org, alim.akhtar@...sung.com,
	linux-samsung-soc@...r.kernel.org, kernel@...i.sm,
	kernel@...gutronix.de, festevam@...il.com,
	linux-media@...r.kernel.org, imx@...ts.linux.dev,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v2 04/12] arm64: dts: fsd: Add CSI nodes

On Tue, Aug 26, 2025 at 10:36:50AM +0200, Krzysztof Kozlowski wrote:
> On 25/08/2025 15:05, Inbaraj E wrote:
> > Hi Krzysztof,
> > 
> >>> CSIS stands for Camera Serial Interface Slave.
> >>
> >> Googling for "MIPI CSIS" gives me 0 results, so I still claim this is not a generic
> >> name.
> > 
> > I checked other vendors (e.g: freescale), and they are using mipi-csi. I'll adopt for the
> > same.
> 
> Then it is just "csi"? Except that you have some other different nodes
> called "csi" as well, so two different devices are "csi"?

This one is high on my list of unfortunate name clashes. Many NXP SoCs
(among others, I've seen that in other vendors too) have IP cores named
"Camera Sensor Interface" that they abbreviate to "CSI". They are
unrelated to the MIPI Camera Serial Interface. I won't blame NXP, as I
think they may have started using the acronym before MIPI CSI became a
big thing.

-- 
Regards,

Laurent Pinchart