[PATCH v4 2/5] dt-bindings: media: add mediatek ISP3.0 camsv

[Krzysztof Kozlowski]

On 10/01/2024 15:14, Julien Stephan wrote:
> From: Phi-bang Nguyen <pnguyen at baylibre.com>
> 
> This adds the bindings, for the ISP3.0 camsv module embedded in
> some Mediatek SoC, such as the mt8365
> 
> Signed-off-by: Phi-bang Nguyen <pnguyen at baylibre.com>
> Signed-off-by: Julien Stephan <jstephan at baylibre.com>
> Link: https://lore.kernel.org/r/20230807094940.329165-4-jstephan@baylibre.com
> ---
>  .../bindings/media/mediatek,mt8365-camsv.yaml | 109 ++++++++++++++++++
>  MAINTAINERS                                   |   1 +
>  2 files changed, 110 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/media/mediatek,mt8365-camsv.yaml
> 
> diff --git a/Documentation/devicetree/bindings/media/mediatek,mt8365-camsv.yaml b/Documentation/devicetree/bindings/media/mediatek,mt8365-camsv.yaml
> new file mode 100644
> index 000000000000..097b1ab6bc72
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/media/mediatek,mt8365-camsv.yaml
> @@ -0,0 +1,109 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +# Copyright (c) 2023 MediaTek, BayLibre
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/media/mediatek,mt8365-camsv.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: MediaTek CAMSV 3.0
> +
> +maintainers:
> +  - Laurent Pinchart <laurent.pinchart at ideasonboard.com>
> +  - Julien Stephan <jstephan at baylibre.com>
> +  - Andy Hsieh <andy.hsieh at mediatek.com>
> +
> +description:
> +  The CAMSV is a set of DMA engines connected to the SENINF CSI-2
> +  receivers. The number of CAMSVs depend on the SoC model.

DMA should not go to media, but to dma

> +
> +properties:
> +  compatible:
> +    const: mediatek,mt8365-camsv
> +
> +  reg:
> +    items:
> +      - description: camsv base
> +      - description: img0 base
> +      - description: tg base
> +
> +  interrupts:
> +    maxItems: 1
> +
> +  power-domains:
> +    maxItems: 1
> +
> +  clocks:
> +    items:
> +      - description: cam clock
> +      - description: camtg clock
> +      - description: camsv clock
> +
> +  clock-names:
> +    items:
> +      - const: cam
> +      - const: camtg
> +      - const: camsv
> +
> +  iommus:
> +    maxItems: 1
> +
> +  ports:
> +    $ref: /schemas/graph.yaml#/properties/ports
> +
> +    properties:
> +      port at 0:
> +        $ref: /schemas/graph.yaml#/properties/port
> +        description: connection point for camsv0

This explains me nothing. What type of connection point? How does it fit
the pipeline going to the display?

It seems you represented DMA as some other device to make your drivers
easier... That's not how it works.

> +
> +    required:
> +      - port at 0
> +
> +required:
> +  - compatible
> +  - interrupts
> +  - clocks
> +  - clock-names
> +  - power-domains
> +  - iommus
> +  - ports
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/interrupt-controller/arm-gic.h>
> +    #include <dt-bindings/interrupt-controller/irq.h>
> +    #include <dt-bindings/clock/mediatek,mt8365-clk.h>
> +    #include <dt-bindings/memory/mediatek,mt8365-larb-port.h>
> +    #include <dt-bindings/power/mediatek,mt8365-power.h>
> +
> +    soc {
> +        #address-cells = <2>;
> +        #size-cells = <2>;
> +
> +        camsv1: camsv at 15050000 {

Node names should be generic. See also an explanation and list of
examples (not exhaustive) in DT specification:
https://devicetree-specification.readthedocs.io/en/latest/chapter2-devicetree-basics.html#generic-names-recommendation



Best regards,
Krzysztof