Re: [PATCH v4 1/2] dt-bindings: display: imx: add binding for i.MX8MP HDMI PVI

From: Luca Ceresoli <luca.ceresoli@bootlin.com>
To: Lucas Stach <l.stach@pengutronix.de>
Cc: Rob Herring <robh+dt@kernel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
	Conor Dooley <conor+dt@kernel.org>, Liu Ying <victor.liu@nxp.com>,
	Andrzej Hajda <andrzej.hajda@intel.com>,
	Neil Armstrong <neil.armstrong@linaro.org>,
	Robert Foss <rfoss@kernel.org>,
	Laurent Pinchart <Laurent.pinchart@ideasonboard.com>,
	Jonas Karlman <jonas@kwiboo.se>,
	Jernej Skrabec <jernej.skrabec@gmail.com>,
	devicetree@vger.kernel.org, dri-devel@lists.freedesktop.org,
	patchwork-lst@pengutronix.de, NXP Linux Team <linux-imx@nxp.com>,
	Pengutronix Kernel Team <kernel@pengutronix.de>,
	linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH v4 1/2] dt-bindings: display: imx: add binding for i.MX8MP HDMI PVI
Date: Fri, 29 Sep 2023 18:48:35 +0200	[thread overview]
Message-ID: <20230929184835.1de69182@booty> (raw)
In-Reply-To: <20230928125536.1782715-1-l.stach@pengutronix.de>

Hi Lucas,

On Thu, 28 Sep 2023 14:55:35 +0200
Lucas Stach <l.stach@pengutronix.de> wrote:

> Add binding for the i.MX8MP HDMI parallel video interface block.
> 
> Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> ---
>  .../display/imx/fsl,imx8mp-hdmi-pvi.yaml      | 83 +++++++++++++++++++
>  1 file changed, 83 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/display/imx/fsl,imx8mp-hdmi-pvi.yaml
> 
> diff --git a/Documentation/devicetree/bindings/display/imx/fsl,imx8mp-hdmi-pvi.yaml b/Documentation/devicetree/bindings/display/imx/fsl,imx8mp-hdmi-pvi.yaml
> new file mode 100644
> index 000000000000..df29006b4090
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/display/imx/fsl,imx8mp-hdmi-pvi.yaml
> @@ -0,0 +1,83 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/display/imx/fsl,imx8mp-hdmi-pvi.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Freescale i.MX8MP HDMI Parallel Video Interface
> +
> +maintainers:
> +  - Lucas Stach <l.stach@pengutronix.de>
> +
> +description: |
> +  The HDMI parallel video interface is a timing and sync generator block in the
> +  i.MX8MP SoC, that sits between the video source and the HDMI TX controller.
> +
> +properties:
> +  compatible:
> +    const: fsl,imx8mp-hdmi-pvi
> +
> +  reg:
> +    maxItems: 1
> +
> +  interrupts:
> +    maxItems: 1
> +
> +  power-domains:
> +    maxItems: 1
> +
> +  ports:
> +    $ref: /schemas/graph.yaml#/properties/ports
> +
> +    properties:
> +      port@0:
> +        $ref: /schemas/graph.yaml#/properties/port
> +        description: Input from the LCDIF controller.
> +
> +      port@1:
> +        $ref: /schemas/graph.yaml#/properties/port
> +        description: Output to the HDMI TX controller.
> +
> +    required:
> +      - port@0
> +      - port@1
> +
> +required:
> +  - compatible
> +  - reg
> +  - interrupts

Sure it is required? In the imx8mp.dtsi I have, which comes for a patch
you sent previously, there is no 'interrupts' property, and HDMI works.

> +  - power-domains
> +  - ports
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/interrupt-controller/irq.h>
> +    #include <dt-bindings/power/imx8mp-power.h>
> +
> +    display-bridge@32fc4000 {
> +        compatible = "fsl,imx8mp-hdmi-pvi";
> +        reg = <0x32fc4000 0x40>;

The device has up to register 0x40, thus I guess the second value should
be 0x44 here. Or maybe 0x100, just to be comfortable. :)

Luca

-- 
Luca Ceresoli, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com

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