linux-kernel - Re: [PATCH v4 5/6] dt-bindings: display: add Unisoc's mipi dsi controller bindings

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Date:   Wed, 24 Mar 2021 12:13:16 +0100
From:   Maxime Ripard <maxime@...no.tech>
To:     Kevin Tang <kevin3.tang@...il.com>
Cc:     maarten.lankhorst@...ux.intel.com, sean@...rly.run,
        airlied@...ux.ie, daniel@...ll.ch, robh+dt@...nel.org,
        mark.rutland@....com, orsonzhai@...il.com, zhang.lyra@...il.com,
        linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        devicetree@...r.kernel.org
Subject: Re: [PATCH v4 5/6] dt-bindings: display: add Unisoc's mipi dsi
 controller bindings

On Mon, Feb 22, 2021 at 09:28:21PM +0800, Kevin Tang wrote:
> From: Kevin Tang <kevin.tang@...soc.com>
> 
> Adds MIPI DSI Controller
> support for Unisoc's display subsystem.
> 
> Cc: Orson Zhai <orsonzhai@...il.com>
> Cc: Chunyan Zhang <zhang.lyra@...il.com>
> Signed-off-by: Kevin Tang <kevin.tang@...soc.com>
> Reviewed-by: Rob Herring <robh@...nel.org>
> ---
>  .../display/sprd/sprd,sharkl3-dsi-host.yaml   | 102 ++++++++++++++++++
>  1 file changed, 102 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/display/sprd/sprd,sharkl3-dsi-host.yaml
> 
> diff --git a/Documentation/devicetree/bindings/display/sprd/sprd,sharkl3-dsi-host.yaml b/Documentation/devicetree/bindings/display/sprd/sprd,sharkl3-dsi-host.yaml
> new file mode 100644
> index 000000000..d439f688f
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/display/sprd/sprd,sharkl3-dsi-host.yaml
> @@ -0,0 +1,102 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/display/sprd/sprd,sharkl3-dsi-host.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Unisoc MIPI DSI Controller
> +
> +maintainers:
> +  - Kevin Tang <kevin.tang@...soc.com>
> +
> +properties:
> +  compatible:
> +    const: sprd,sharkl3-dsi-host
> +
> +  reg:
> +    maxItems: 1
> +
> +  interrupts:
> +    maxItems: 2
> +
> +  clocks:
> +    minItems: 1
> +
> +  clock-names:
> +    items:
> +      - const: clk_src_96m
> +
> +  power-domains:
> +    maxItems: 1
> +
> +  ports:
> +    type: object
> +
> +    properties:
> +      "#address-cells":
> +        const: 1
> +
> +      "#size-cells":
> +        const: 0
> +
> +      port@0:
> +        type: object
> +        description:
> +          A port node with endpoint definitions as defined in
> +          Documentation/devicetree/bindings/media/video-interfaces.txt.
> +          That port should be the input endpoint, usually coming from
> +          the associated DPU.
> +      port@1:
> +        type: object
> +        description:
> +          A port node with endpoint definitions as defined in
> +          Documentation/devicetree/bindings/media/video-interfaces.txt.
> +          That port should be the output endpoint, usually output to
> +          the associated panel.

The DSI generic binding asks that peripherals that are controlled
through a DCS be a subnode of the MIPI-DSI bus, not through a port
endpoint.

Maxime

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