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Date: Mon, 13 Dec 2021 14:41:46 -0600
From: Rob Herring <robh@...nel.org>
To: Geert Uytterhoeven <geert+renesas@...der.be>
Cc: Boris Brezillon <bbrezillon@...nel.org>,
David Airlie <airlied@...ux.ie>,
Daniel Vetter <daniel@...ll.ch>,
dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org,
linux-renesas-soc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH/RFC v2] dt-bindings: display: bridge: sil,sii9022:
Convert to json-schema
On Fri, Dec 03, 2021 at 03:14:07PM +0100, Geert Uytterhoeven wrote:
> Convert the Silicon Image sii902x HDMI bridge Device Tree binding
> documentation to json-schema.
>
> Add missing sil,sii9022-cpi and sil,sii9022-tpi compatible values.
>
> Signed-off-by: Geert Uytterhoeven <geert+renesas@...der.be>
> ---
> RFC as I do not know the meaning of the various ports subnodes.
Is that too hard to figure out? There's no examples in the tree?
>
> v2:
> - Rework sil,i2s-data-lanes,
> - Add schema reference to ports.
> ---
> .../bindings/display/bridge/sii902x.txt | 78 ----------
> .../bindings/display/bridge/sil,sii9022.yaml | 133 ++++++++++++++++++
> 2 files changed, 133 insertions(+), 78 deletions(-)
> delete mode 100644 Documentation/devicetree/bindings/display/bridge/sii902x.txt
> create mode 100644 Documentation/devicetree/bindings/display/bridge/sil,sii9022.yaml
>
> diff --git a/Documentation/devicetree/bindings/display/bridge/sii902x.txt b/Documentation/devicetree/bindings/display/bridge/sii902x.txt
> deleted file mode 100644
> index 3bc760cc31cbbeee..0000000000000000
> --- a/Documentation/devicetree/bindings/display/bridge/sii902x.txt
> +++ /dev/null
> @@ -1,78 +0,0 @@
> -sii902x HDMI bridge bindings
> -
> -Required properties:
> - - compatible: "sil,sii9022"
> - - reg: i2c address of the bridge
> -
> -Optional properties:
> - - interrupts: describe the interrupt line used to inform the host
> - about hotplug events.
> - - reset-gpios: OF device-tree gpio specification for RST_N pin.
> - - iovcc-supply: I/O Supply Voltage (1.8V or 3.3V)
> - - cvcc12-supply: Digital Core Supply Voltage (1.2V)
> -
> - HDMI audio properties:
> - - #sound-dai-cells: <0> or <1>. <0> if only i2s or spdif pin
> - is wired, <1> if the both are wired. HDMI audio is
> - configured only if this property is found.
> - - sil,i2s-data-lanes: Array of up to 4 integers with values of 0-3
> - Each integer indicates which i2s pin is connected to which
> - audio fifo. The first integer selects i2s audio pin for the
> - first audio fifo#0 (HDMI channels 1&2), second for fifo#1
> - (HDMI channels 3&4), and so on. There is 4 fifos and 4 i2s
> - pins (SD0 - SD3). Any i2s pin can be connected to any fifo,
> - but there can be no gaps. E.g. an i2s pin must be mapped to
> - fifo#0 and fifo#1 before mapping a channel to fifo#2. Default
> - value is <0>, describing SD0 pin beiging routed to hdmi audio
> - fifo #0.
> - - clocks: phandle and clock specifier for each clock listed in
> - the clock-names property
> - - clock-names: "mclk"
> - Describes SII902x MCLK input. MCLK can be used to produce
> - HDMI audio CTS values. This property follows
> - Documentation/devicetree/bindings/clock/clock-bindings.txt
> - consumer binding.
> -
> - If HDMI audio is configured the sii902x device becomes an I2S
> - and/or spdif audio codec component (e.g a digital audio sink),
> - that can be used in configuring a full audio devices with
> - simple-card or audio-graph-card binding. See their binding
> - documents on how to describe the way the sii902x device is
> - connected to the rest of the audio system:
> - Documentation/devicetree/bindings/sound/simple-card.yaml
> - Documentation/devicetree/bindings/sound/audio-graph-card.yaml
> - Note: In case of the audio-graph-card binding the used port
> - index should be 3.
At least the audio port was defined.
> -
> -Optional subnodes:
> - - video input: this subnode can contain a video input port node
> - to connect the bridge to a display controller output (See this
> - documentation [1]).
> -
> -[1]: Documentation/devicetree/bindings/media/video-interfaces.txt
> -
> -Example:
> - hdmi-bridge@39 {
> - compatible = "sil,sii9022";
> - reg = <0x39>;
> - reset-gpios = <&pioA 1 0>;
> - iovcc-supply = <&v3v3_hdmi>;
> - cvcc12-supply = <&v1v2_hdmi>;
> -
> - #sound-dai-cells = <0>;
> - sil,i2s-data-lanes = < 0 1 2 >;
> - clocks = <&mclk>;
> - clock-names = "mclk";
> -
> - ports {
> - #address-cells = <1>;
> - #size-cells = <0>;
> -
> - port@0 {
> - reg = <0>;
> - bridge_in: endpoint {
> - remote-endpoint = <&dc_out>;
> - };
> - };
> - };
> - };
> diff --git a/Documentation/devicetree/bindings/display/bridge/sil,sii9022.yaml b/Documentation/devicetree/bindings/display/bridge/sil,sii9022.yaml
> new file mode 100644
> index 0000000000000000..b39537f4fe8694ef
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/display/bridge/sil,sii9022.yaml
> @@ -0,0 +1,133 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/display/bridge/sil,sii9022.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Silicon Image sii902x HDMI bridge
> +
> +maintainers:
> + - Boris Brezillon <bbrezillon@...nel.org>
> +
> +properties:
> + compatible:
> + oneOf:
> + - items:
> + - enum:
> + - sil,sii9022-cpi
> + - sil,sii9022-tpi
> + - const: sil,sii9022
> + - const: sil,sii9022
> +
> + reg:
> + maxItems: 1
> +
> + interrupts:
> + maxItems: 1
> + description: Interrupt line used to inform the host about hotplug events.
> +
> + reset-gpios:
> + maxItems: 1
> +
> + iovcc-supply:
> + description: I/O Supply Voltage (1.8V or 3.3V)
> +
> + cvcc12-supply:
> + description: Digital Core Supply Voltage (1.2V)
> +
> + '#sound-dai-cells':
> + enum: [ 0, 1 ]
> + description: |
> + <0> if only i2s or spdif pin is wired,
> + <1> if both are wired.
> + HDMI audio is configured only if this property is found.
> + If HDMI audio is configured the sii902x device becomes an I2S and/or
> + spdif audio codec component (e.g. a digital audio sink), that can be used
> + in configuring a full audio devices with simple-card or audio-graph-card
> + binding. See their binding documents on how to describe the way the
> + sii902x device is connected to the rest of the audio system:
> + Documentation/devicetree/bindings/sound/simple-card.yaml
> + Documentation/devicetree/bindings/sound/audio-graph-card.yaml
> + Note: In case of the audio-graph-card binding the used port index should
> + be 3.
> +
> + sil,i2s-data-lanes:
> + $ref: /schemas/types.yaml#/definitions/uint32-array
> + minItems: 1
> + maxItems: 4
> + uniqueItems: true
> + items:
> + enum: [ 0, 1, 2, 3 ]
> + description:
> + Each integer indicates which i2s pin is connected to which audio fifo.
> + The first integer selects i2s audio pin for the first audio fifo#0 (HDMI
> + channels 1&2), second for fifo#1 (HDMI channels 3&4), and so on. There
> + are 4 fifos and 4 i2s pins (SD0 - SD3). Any i2s pin can be connected to
> + any fifo, but there can be no gaps. E.g. an i2s pin must be mapped to
> + fifo#0 and fifo#1 before mapping a channel to fifo#2. Default value is
> + <0>, describing SD0 pin being routed to hdmi audio fifo #0.
> +
> + clocks:
> + maxItems: 1
> + description: MCLK input. MCLK can be used to produce HDMI audio CTS values.
> +
> + clock-names:
> + const: mclk
> +
> + ports:
> + $ref: /schemas/graph.yaml#/properties/ports
> +
> + properties:
> + port@0:
> + type: object
$ref: /schemas/graph.yaml#/properties/port
> + description: FIXME
> +
> + port@1:
> + type: object
$ref: /schemas/graph.yaml#/properties/port
> + description: FIXME
> +
> + port@2:
> + type: object
> + description: FIXME
> +
> + port@3:
> + type: object
> + description: FIXME
> +
> +required:
> + - compatible
> + - reg
> +
> +additionalProperties: false
> +
> +examples:
> + - |
> + i2c {
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + hdmi-bridge@39 {
> + compatible = "sil,sii9022";
> + reg = <0x39>;
> + reset-gpios = <&pioA 1 0>;
> + iovcc-supply = <&v3v3_hdmi>;
> + cvcc12-supply = <&v1v2_hdmi>;
> +
> + #sound-dai-cells = <0>;
> + sil,i2s-data-lanes = < 0 1 2 >;
> + clocks = <&mclk>;
> + clock-names = "mclk";
> +
> + ports {
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + port@0 {
> + reg = <0>;
> + bridge_in: endpoint {
> + remote-endpoint = <&dc_out>;
> + };
> + };
> + };
> + };
> + };
> --
> 2.25.1
>
>
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