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-0400 From: Frank Li To: Sakari Ailus Cc: Rui Miguel Silva , Laurent Pinchart , Martin Kepplinger , Purism Kernel Team , Mauro Carvalho Chehab , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Eugen Hristev , Shawn Guo , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam , Peng Fan , Alice Yuan , Vinod Koul , Kishon Vijay Abraham I , Philipp Zabel , Steve Longerbeam , Greg Kroah-Hartman , linux-media@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-phy@lists.infradead.org, linux-staging@lists.linux.dev, Luis Oliveira Subject: Re: [PATCH v3 01/31] dt-bindings: media: add DW MIPI CSI-2 Host support Message-ID: References: <20250821-95_cam-v3-0-c9286fbb34b9@nxp.com> <20250821-95_cam-v3-1-c9286fbb34b9@nxp.com> Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-ClientProxiedBy: PH1PEPF000132E6.NAMP220.PROD.OUTLOOK.COM (2603:10b6:518:1::26) To 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linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Mon, Oct 27, 2025 at 10:51:21PM +0200, Sakari Ailus wrote: > Hi Frank, > > On Mon, Oct 27, 2025 at 12:32:28PM -0400, Frank Li wrote: > > On Mon, Oct 27, 2025 at 10:31:25AM +0200, Sakari Ailus wrote: > > > Hei Eugen, > > > > > > On Thu, Aug 21, 2025 at 04:15:36PM -0400, Frank Li wrote: > > > > From: Eugen Hristev > > > > > > > > Add bindings for Synopsys DesignWare MIPI CSI-2 host, which used at i.MX93 > > > > and i.MX95 platform. > > > > > > > > Signed-off-by: Luis Oliveira > > > > Signed-off-by: Eugen Hristev > > > > Signed-off-by: Frank Li > > > > --- > > > > Change in v3 > > > > - drop remote-endpoint: true > > > > - drop clock-lanes > > > > > > > > Change in v2 > > > > - remove Eugen Hristev from mantainer. > > > > - update ugen Hristev's s-o-b tag to align original author's email address > > > > - remove single snps,dw-mipi-csi2-v150 compatible string > > > > - move additionalProperties after required > > > > --- > > > > .../bindings/media/snps,dw-mipi-csi2-v150.yaml | 151 +++++++++++++++++++++ > > > > MAINTAINERS | 1 + > > > > 2 files changed, 152 insertions(+) > > > > > > > > diff --git a/Documentation/devicetree/bindings/media/snps,dw-mipi-csi2-v150.yaml b/Documentation/devicetree/bindings/media/snps,dw-mipi-csi2-v150.yaml > > > > new file mode 100644 > > > > index 0000000000000000000000000000000000000000..d950daa4ee9cfd504ef84b83271b2a1b710ffd6b > > > > --- /dev/null > > > > +++ b/Documentation/devicetree/bindings/media/snps,dw-mipi-csi2-v150.yaml > > > > @@ -0,0 +1,151 @@ > > > > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) > > > > +%YAML 1.2 > > > > +--- > > > > +$id: http://devicetree.org/schemas/media/snps,dw-mipi-csi2-v150.yaml# > > > > +$schema: http://devicetree.org/meta-schemas/core.yaml# > > > > + > > > > +title: Synopsys DesignWare CSI-2 Host controller (csi2host) > > > > + > > > > +maintainers: > > > > + - Frank Li > > > > + > > > > +description: > > > > + CSI2HOST is used to receive image coming from an MIPI CSI-2 compatible > > > > + camera. It will convert the incoming CSI-2 stream into a dedicated > > > > + interface called the Synopsys IDI (Image Data Interface). > > > > + This interface is a 32-bit SoC internal only, and can be assimilated > > > > + with a CSI-2 interface. > > > > + > > > > +properties: > > > > + compatible: > > > > + items: > > > > + - enum: > > > > + - fsl,imx93-mipi-csi2 > > > > + - const: snps,dw-mipi-csi2-v150 > > > > + > > > > + reg: > > > > + items: > > > > + - description: MIPI CSI-2 core register > > > > + > > > > + reg-names: > > > > + items: > > > > + - const: core > > > > + > > > > + clocks: > > > > + maxItems: 2 > > > > + > > > > + clock-names: > > > > + items: > > > > + - const: per > > > > + - const: pixel > > > > + > > > > + phys: > > > > + maxItems: 1 > > > > + description: MIPI D-PHY > > > > + > > > > + phy-names: > > > > + items: > > > > + - const: rx > > > > + > > > > + resets: > > > > + maxItems: 1 > > > > + > > > > + interrupts: > > > > + maxItems: 1 > > > > + > > > > + power-domains: > > > > + maxItems: 1 > > > > + > > > > + ports: > > > > + $ref: /schemas/graph.yaml#/properties/ports > > > > + > > > > + properties: > > > > + port@0: > > > > + $ref: /schemas/graph.yaml#/$defs/port-base > > > > + unevaluatedProperties: false > > > > + description: > > > > + Input port node, single endpoint describing the input port. > > > > + > > > > + properties: > > > > + endpoint: > > > > + $ref: video-interfaces.yaml# > > > > + unevaluatedProperties: false > > > > + description: Endpoint connected to input device > > > > + > > > > + properties: > > > > + bus-type: > > > > + const: 4 > > > > > > If 4 is the only value supported, you can drop the property altogether. > > > > Sorry, What's your means here? There are more options in video-interfaces.yaml. > > here just add restriction for bus-type. otherwise other value can be > > provide in dts file. > > It could, but wouldn't any other value be incorrect? at least that 5 # Parallel doesn't make sense for CSI2's input. Frank > > In other words, this property is redundant and should be dropped. > > > > > > > > > > + > > > > + data-lanes: > > > > + minItems: 1 > > > > + maxItems: 4 > > > > + items: > > > > + maximum: 4 > > > > + > > > > + port@1: > > > > + $ref: /schemas/graph.yaml#/$defs/port-base > > > > + unevaluatedProperties: false > > > > + description: > > > > + Output port node, single endpoint describing the output port. > > > > + > > > > + properties: > > > > + endpoint: > > > > + unevaluatedProperties: false > > > > + $ref: video-interfaces.yaml# > > > > + description: Endpoint connected to output device > > > > + > > > > + properties: > > > > + bus-type: > > > > + const: 4 > > > > > > Are both input and output of this block CSI-2 with D-PHY? > > > > Yes, input from camera sensor, output to others image processors to do data > > transfer or format convert. > > The description appears to be saying this is "Synopsys IDI", not CSI-2 with > D-PHY. We don't have a bus-type for IDI. Couldn't you simply drop it? > > -- > Regards, > > Sakari Ailus