linux-kernel - Re: [PATCH v9 05/11] dt-bindings: display: add i.MX6 MIPI DSI host controller doc

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Date:   Fri, 12 Jun 2020 15:11:01 -0600
From:   Rob Herring <robh@...nel.org>
To:     Adrian Ratiu <adrian.ratiu@...labora.com>
Cc:     linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-rockchip@...ts.infradead.org,
        Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
        linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        Heiko Stuebner <heiko@...ech.de>,
        Philippe CORNU <philippe.cornu@...com>,
        Yannick FERTRE <yannick.fertre@...com>,
        Jernej Skrabec <jernej.skrabec@...l.net>,
        Andrzej Hajda <a.hajda@...sung.com>,
        Jonas Karlman <jonas@...boo.se>, linux-imx@....com,
        kernel@...labora.com, linux-stm32@...md-mailman.stormreply.com,
        Neil Armstrong <narmstrong@...libre.com>,
        Fabio Estevam <festevam@...il.com>,
        Adrian Pop <pop.adrian61@...il.com>,
        Arnaud Ferraris <arnaud.ferraris@...labora.com>,
        Sjoerd Simons <sjoerd.simons@...labora.com>,
        Martyn Welch <martyn.welch@...labora.com>
Subject: Re: [PATCH v9 05/11] dt-bindings: display: add i.MX6 MIPI DSI host
 controller doc

On Tue, Jun 09, 2020 at 08:49:53PM +0300, Adrian Ratiu wrote:
> This provides an example DT binding for the MIPI DSI host controller

It's not an example. It defines the exact binding for this peripheral.

> present on the i.MX6 SoC based on Synopsis DesignWare v1.01 IP.
> 
> Cc: Rob Herring <robh@...nel.org>
> Cc: Neil Armstrong <narmstrong@...libre.com>
> Cc: Fabio Estevam <festevam@...il.com>
> Cc: Laurent Pinchart <laurent.pinchart@...asonboard.com>
> Cc: devicetree@...r.kernel.org
> Tested-by: Adrian Pop <pop.adrian61@...il.com>
> Tested-by: Arnaud Ferraris <arnaud.ferraris@...labora.com>
> Signed-off-by: Sjoerd Simons <sjoerd.simons@...labora.com>
> Signed-off-by: Martyn Welch <martyn.welch@...labora.com>
> Signed-off-by: Adrian Ratiu <adrian.ratiu@...labora.com>
> ---
> Changes since v8:
>   - Fixed small compatible string typo caught by checkpatch
>   - Added custom select for 'fsl,imx6-mipi-dsi' (Rob)
>   - Replaced additionalProperties -> unevaluatedProperties (Rob)
>   - Dropped all nodes not adding any new constraints apart from
>   the recently upstreamed snps,dw-mipi-dsi.yaml (Rob)
> 
> Changes since v7:
>   - Clarified port@0,1 descriptions, marked them as required and
>   added missing port@0 in example (Laurent)
> 
> Changes since v6:
>   - Added ref to the newly created snps,dw-mipi-dsi.yaml (Laurent)
>   - Moved *-cells properties outside patternProperties (Laurent)
>   - Removed the panel port documentation (Laurent)
>   - Wrapped lines at 80 chars, typo fixes, sort includes (Laurent)
> 
> Changes since v5:
>   - Fixed missing reg warning (Fabio)
>   - Updated dt-schema and fixed warnings (Rob)
> 
> Changes since v4:
>   - Fixed yaml binding to pass `make dt_binding_check dtbs_check`
>   and addressed received binding feedback (Rob)
> 
> Changes since v3:
>   - Added commit message (Neil)
>   - Converted to yaml format (Neil)
>   - Minor dt node + driver fixes (Rob)
>   - Added small panel example to the host controller binding
> 
> Changes since v2:
>   - Fixed commit tags (Emil)
> ---
>  .../display/imx/fsl,mipi-dsi-imx6.yaml        | 112 ++++++++++++++++++
>  1 file changed, 112 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/display/imx/fsl,mipi-dsi-imx6.yaml
> 
> diff --git a/Documentation/devicetree/bindings/display/imx/fsl,mipi-dsi-imx6.yaml b/Documentation/devicetree/bindings/display/imx/fsl,mipi-dsi-imx6.yaml
> new file mode 100644
> index 0000000000000..86093729fd5f9
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/display/imx/fsl,mipi-dsi-imx6.yaml
> @@ -0,0 +1,112 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/display/imx/fsl,mipi-dsi-imx6.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Freescale i.MX6 DW MIPI DSI Host Controller
> +
> +maintainers:
> +  - Adrian Ratiu <adrian.ratiu@...labora.com>
> +
> +description: |
> +  The i.MX6 DSI host controller is a Synopsys DesignWare MIPI DSI v1.01
> +  IP block with a companion PHY IP.
> +
> +  These DT bindings follow the Synopsys DW MIPI DSI bindings defined in
> +  Documentation/devicetree/bindings/display/bridge/dw_mipi_dsi.txt with
> +  the following device-specific properties.
> +
> +allOf:
> +  - $ref: ../bridge/snps,dw-mipi-dsi.yaml#
> +
> +# Need a custom select here or 'snps,dw-mipi-dsi' will match lots of nodes
> +select:
> +  properties:
> +    compatible:
> +      contains:
> +        enum:
> +          - fsl,imx6-mipi-dsi
> +  required:
> +    - compatible
> +
> +properties:

> +  '#address-cells':
> +    const: 1
> +
> +  '#size-cells':
> +    const: 0

These 2 are covered by dsi-controller.yaml, so you can drop them.

Otherwise,

Reviewed-by: Rob Herring <robh@...nel.org>