linux-kernel - Re: [PATCH 2/4] dt-bindings: media: Add bindings for raspberrypi,rp1-cfe

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Date: Tue, 19 Mar 2024 07:09:03 +0100
From: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To: Tomi Valkeinen <tomi.valkeinen@...asonboard.com>,
 Mauro Carvalho Chehab <mchehab@...nel.org>,
 Raspberry Pi Kernel Maintenance <kernel-list@...pberrypi.com>,
 Rob Herring <robh+dt@...nel.org>,
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
 Conor Dooley <conor+dt@...nel.org>,
 Florian Fainelli <florian.fainelli@...adcom.com>,
 Broadcom internal kernel review list <bcm-kernel-feedback-list@...adcom.com>
Cc: linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
 devicetree@...r.kernel.org, linux-rpi-kernel@...ts.infradead.org,
 linux-arm-kernel@...ts.infradead.org, Naushir Patuck
 <naush@...pberrypi.com>, Laurent Pinchart
 <laurent.pinchart@...asonboard.com>,
 Sakari Ailus <sakari.ailus@...ux.intel.com>,
 Jacopo Mondi <jacopo.mondi@...asonboard.com>,
 Kieran Bingham <kieran.bingham@...asonboard.com>
Subject: Re: [PATCH 2/4] dt-bindings: media: Add bindings for
 raspberrypi,rp1-cfe

On 18/03/2024 16:49, Tomi Valkeinen wrote:
> Add DT bindings for raspberrypi,rp1-cfe.
> 
> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@...asonboard.com>
> ---
>  .../bindings/media/raspberrypi,rp1-cfe.yaml        | 103 +++++++++++++++++++++
>  1 file changed, 103 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/media/raspberrypi,rp1-cfe.yaml b/Documentation/devicetree/bindings/media/raspberrypi,rp1-cfe.yaml
> new file mode 100644
> index 000000000000..7b2beeaaab0e
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/media/raspberrypi,rp1-cfe.yaml
> @@ -0,0 +1,103 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/media/raspberrypi,rp1-cfe.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Raspberry Pi PiSP Camera Front End
> +
> +maintainers:
> +  - Tomi Valkeinen <tomi.valkeinen@...asonboard.com>
> +  - Raspberry Pi Kernel Maintenance <kernel-list@...pberrypi.com>
> +
> +description: |
> +  The Raspberry Pi PiSP Camera Front End is a module in Raspberrypi 5's RP1 I/O
> +  controller, that contains:
> +  - MIPI D-PHY
> +  - MIPI CSI-2 receiver
> +  - Simple image processor (called PiSP Front End, or FE)
> +
> +  The FE documentation is available at:
> +  https://datasheets.raspberrypi.com/camera/raspberry-pi-image-signal-processor-specification.pdf
> +
> +  The PHY and CSI-2 receiver part have no public documentation.
> +
> +properties:
> +  compatible:
> +    const: raspberrypi,rpi5-rp1-cfe
> +
> +  reg:
> +    items:
> +      - description: CSI-2 registers
> +      - description: D-PHY registers
> +      - description: MIPI CFG (a simple top-level mux) registers
> +      - description: FE registers
> +
> +  interrupts:
> +    maxItems: 1
> +
> +  clocks:
> +    maxItems: 1
> +
> +  port:
> +    $ref: /schemas/graph.yaml#/$defs/port-base
> +    additionalProperties: false
> +    description: CSI-2 RX Port

Only one port, so there is nothing to output to?

> +
> +    properties:
> +      endpoint:
> +        $ref: video-interfaces.yaml#
> +        unevaluatedProperties: false
> +
> +        properties:
> +          data-lanes:
> +            minItems: 1
> +            maxItems: 4
> +
> +          clock-lanes:
> +            maxItems: 1
> +
> +          clock-noncontinuous: true

Drop

> +
> +        required:
> +          - clock-lanes
> +          - data-lanes
> +
> +required:
> +  - compatible
> +  - reg
> +  - interrupts
> +  - clocks
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/clock/rp1.h>
> +    #include <dt-bindings/interrupt-controller/irq.h>
> +    #include <dt-bindings/mfd/rp1.h>
> +
> +    rpi1 {

soc

> +        #address-cells = <2>;
> +        #size-cells = <2>;
> +
> +      csi@...000 {

Fix the indentation. You switched back to 2 spaces here...

> +        compatible = "raspberrypi,rp1-cfe";
> +        reg = <0xc0 0x40110000  0x0 0x100>,
> +              <0xc0 0x40114000  0x0 0x100>,

Just one space before 0x0

> 

Best regards,
Krzysztof