linux-kernel - Re: [PATCH v4 02/15] dt-bindings: media: add description of stm32 csi

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Message-ID: <Z17JItE-98IIrnMv@valkosipuli.retiisi.eu>
Date: Sun, 15 Dec 2024 12:18:42 +0000
From: Sakari Ailus <sakari.ailus@....fi>
To: Alain Volmat <alain.volmat@...s.st.com>
Cc: Hugues Fruchet <hugues.fruchet@...s.st.com>,
	Mauro Carvalho Chehab <mchehab@...nel.org>,
	Maxime Coquelin <mcoquelin.stm32@...il.com>,
	Alexandre Torgue <alexandre.torgue@...s.st.com>,
	Sakari Ailus <sakari.ailus@...ux.intel.com>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Philipp Zabel <p.zabel@...gutronix.de>,
	Hans Verkuil <hverkuil@...all.nl>, linux-media@...r.kernel.org,
	linux-stm32@...md-mailman.stormreply.com,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	devicetree@...r.kernel.org,
	Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Subject: Re: [PATCH v4 02/15] dt-bindings: media: add description of stm32 csi

Hi Alain,

On Thu, Dec 12, 2024 at 10:17:26AM +0100, Alain Volmat wrote:
> Add the stm32 csi controller description.
> 
> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
> Signed-off-by: Alain Volmat <alain.volmat@...s.st.com>
> ---
> v2:
>   - rename into st,stm32mp25-csi.yaml to match compatible
>   - correct port / data-lanes (remove useless lines &
>     use data-lanes 1 and 2 instead of 0 and 1)
>   - correct commit log
> ---
>  .../bindings/media/st,stm32mp25-csi.yaml           | 125 +++++++++++++++++++++
>  1 file changed, 125 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/media/st,stm32mp25-csi.yaml b/Documentation/devicetree/bindings/media/st,stm32mp25-csi.yaml
> new file mode 100644
> index 000000000000..33bedfe41924
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/media/st,stm32mp25-csi.yaml
> @@ -0,0 +1,125 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/media/st,stm32mp25-csi.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: STMicroelectronics STM32 CSI controller
> +
> +description:
> +  The STM32 CSI controller allows connecting a CSI based
> +  camera to the DCMIPP camera pipeline.

CSI-2 I presume?

You should also document it here it has D-PHY...

> +
> +maintainers:
> +  - Alain Volmat <alain.volmat@...s.st.com>
> +
> +properties:
> +  compatible:
> +    enum:
> +      - st,stm32mp25-csi
> +
> +  reg:
> +    maxItems: 1
> +
> +  interrupts:
> +    maxItems: 1
> +
> +  clocks:
> +    maxItems: 3
> +
> +  clock-names:
> +    items:
> +      - const: pclk
> +      - const: txesc
> +      - const: csi2phy
> +
> +  resets:
> +    maxItems: 1
> +
> +  vdd-supply:
> +    description: Digital core power supply (0.91V)
> +
> +  vdda18-supply:
> +    description: System analog power supply (1.8V)
> +
> +  access-controllers:
> +    minItems: 1
> +    maxItems: 2
> +
> +  ports:
> +    $ref: /schemas/graph.yaml#/properties/ports
> +
> +    properties:
> +      port@0:
> +        $ref: /schemas/graph.yaml#/$defs/port-base
> +        unevaluatedProperties: false
> +        description:
> +          Input port node
> +
> +        properties:
> +          endpoint:
> +            $ref: video-interfaces.yaml#
> +            unevaluatedProperties: false
> +
> +            properties:
> +              data-lanes:
> +                minItems: 1
> +                items:
> +                  - const: 1
> +                  - const: 2
> +
> +            required:
> +              - data-lanes
> +
> +      port@1:
> +        $ref: /schemas/graph.yaml#/properties/port
> +        description:
> +          Output port node
> +
> +required:
> +  - compatible
> +  - reg
> +  - interrupts
> +  - clocks
> +  - clock-names
> +  - resets
> +  - ports
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/clock/st,stm32mp25-rcc.h>
> +    #include <dt-bindings/interrupt-controller/arm-gic.h>
> +    #include <dt-bindings/media/video-interfaces.h>
> +    #include <dt-bindings/reset/st,stm32mp25-rcc.h>
> +    csi@...20000 {
> +        compatible = "st,stm32mp25-csi";
> +        reg = <0x48020000 0x2000>;
> +        interrupts = <GIC_SPI 142 IRQ_TYPE_LEVEL_HIGH>;
> +        resets = <&rcc CSI_R>;
> +        clocks = <&rcc CK_KER_CSI>, <&rcc CK_KER_CSITXESC>, <&rcc CK_KER_CSIPHY>;
> +        clock-names = "pclk", "txesc", "csi2phy";
> +
> +        ports {
> +            #address-cells = <1>;
> +            #size-cells = <0>;
> +            port@0 {
> +                reg = <0>;
> +                endpoint {
> +                    remote-endpoint = <&imx335_ep>;
> +                    data-lanes = <1 2>;
> +                    bus-type = <MEDIA_BUS_TYPE_CSI2_DPHY>;

...and drop bus-type property.

> +                };
> +            };
> +
> +            port@1 {
> +                reg = <1>;
> +                endpoint {
> +                    remote-endpoint = <&dcmipp_0>;
> +                };
> +            };
> +        };
> +    };
> +
> +...
> 

-- 
Kind regards,

Sakari Ailus