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Date: Fri, 14 Oct 2022 10:13:25 -0500
From: Rob Herring <robh@...nel.org>
To: Padmanabhan Rajanbabu <p.rajanbabu@...sung.com>
Cc: lgirdwood@...il.com, broonie@...nel.org,
krzysztof.kozlowski+dt@...aro.org, s.nawrocki@...sung.com,
perex@...ex.cz, tiwai@...e.com, pankaj.dubey@...sung.com,
alim.akhtar@...sung.com, rcsekar@...sung.com,
aswani.reddy@...sung.com, alsa-devel@...a-project.org,
devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-samsung-soc@...r.kernel.org
Subject: Re: [PATCH 3/6] dt-bindings: sound: Add sound card bindings for
Tesla FSD
On Fri, Oct 14, 2022 at 03:51:48PM +0530, Padmanabhan Rajanbabu wrote:
> Add dt-binding reference document to configure the DAI link for Tesla
> FSD sound card driver.
The simple-card or graph-card bindings don't work for you?
>
> Signed-off-by: Padmanabhan Rajanbabu <p.rajanbabu@...sung.com>
> ---
> .../bindings/sound/tesla,fsd-card.yaml | 158 ++++++++++++++++++
> 1 file changed, 158 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/sound/tesla,fsd-card.yaml
>
> diff --git a/Documentation/devicetree/bindings/sound/tesla,fsd-card.yaml b/Documentation/devicetree/bindings/sound/tesla,fsd-card.yaml
> new file mode 100644
> index 000000000000..4bd590f4ee27
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/sound/tesla,fsd-card.yaml
> @@ -0,0 +1,158 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +# Copyright 2022 Samsung Electronics Co. Ltd.
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/sound/tesla,fsd-card.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Tesla FSD ASoC sound card driver
> +
> +maintainers:
> + - Padmanabhan Rajanbabu <p.rajanbabu@...sung.com>
> +
> +description: |
> + This binding describes the node properties and essential DT entries of FSD
> + SoC sound card node
> +
> +select: false
Never apply this schema. Why?
> +
> +properties:
> + compatible:
> + enum:
> + - tesla,fsd-sndcard
> +
> + model:
> + description: Describes the Name of the sound card
> + $ref: /schemas/types.yaml#/definitions/string
> +
> + widgets:
> + description: A list of DAPM widgets in the sound card. Each entry is a pair
> + of strings, the first being the widget name and the second being the
> + widget alias
> + $ref: /schemas/types.yaml#/definitions/string-array
> +
> + audio-routing:
> + description: A list of the connections between audio components. Each entry
> + is a pair of strings, the first being the connection's sink, the second
> + being the connection's source
> + $ref: /schemas/types.yaml#/definitions/string-array
> +
> + dai-tdm-slot-num:
> + description: Enables TDM mode and specifies the number of TDM slots to be
> + enabled
> + $ref: /schemas/types.yaml#/definitions/uint32
> + enum: [0, 1, 2, 3, 4, 5, 6, 7, 8]
maximum: 8
> + default: 2
> +
> + dai-tdm-slot-width:
> + description: Specifies the slot width of each TDm slot enabled
> + $ref: /schemas/types.yaml#/definitions/uint32
> + enum: [8, 16, 24]
> + default: 16
All the above have types defined. You should not be redefining the
types.
> +
> + dai-link:
> + description: Holds the DAI link data between CPU, Codec and Platform
> + type: object
additionalProperties: false
> + properties:
> + link-name:
> + description: Specifies the name of the DAI link
> + $ref: /schemas/types.yaml#/definitions/string
> +
> + dai-format:
> + description: Specifies the serial data format of CPU DAI
> + $ref: /schemas/types.yaml#/definitions/string
> +
> + tesla,bitclock-master:
> + description: Specifies the phandle of bitclock master DAI
> + $ref: /schemas/types.yaml#/definitions/phandle
> +
> + tesla,frame-master:
> + description: Specifies the phandle of frameclock master DAI
> + $ref: /schemas/types.yaml#/definitions/phandle
These are common properties. Drop 'tesla'.
> +
> + cpu:
> + description: Holds the CPU DAI node and instance
> + type: object
additionalProperties: false
> + properties:
> + sound-dai:
> + description: Specifies the phandle of CPU DAI node
> + $ref: /schemas/types.yaml#/definitions/phandle-array
> +
> + required:
> + - sound-dai
> +
> + codec:
> + description: Holds the Codec DAI node and instance
> + type: object
additionalProperties: false
> + properties:
> + sound-dai:
> + description: Specifies the phandle of Codec DAI node
> + $ref: /schemas/types.yaml#/definitions/phandle-array
Already has a type. Need to define how many entries (maxItems: 1 ?).
> +
> + required:
> + - sound-dai
> +
> + required:
> + - link-name
> + - dai-format
> + - tesla,bitclock-master
> + - tesla,frame-master
> + - cpu
> +
> +dependencies:
> + dai-tdm-slot-width: [ 'dai-tdm-slot-num' ]
This should be captured with tdm-slot.txt converted to schema.
> +
> +required:
> + - compatible
> + - model
> + - dai-link
> +
> +additionalProperties: false
> +
> +examples:
> + - |
> + sound {
> + compatible = "tesla,fsd-sndcard";
> + status = "disabled";
Why have a disabled example? Other than your example won't pass your
schema.
> + model = "fsd-i2s";
> +
> + primary-dai-link-0 {
> + link-name = "fsd-primary-0";
> + dai-format = "i2s";
> + tesla,bitclock-master = <&tdm_0>;
> + tesla,frame-master = <&tdm_0>;
> + cpu {
> + sound-dai = <&tdm_0 0>;
> + };
> + };
> +
> + secondary-dai-link-0 {
> + link-name = "fsd-secondary-0";
> + dai-format = "i2s";
> + tesla,bitclock-master = <&tdm_0>;
> + tesla,frame-master = <&tdm_0>;
> + cpu {
> + sound-dai = <&tdm_0 1>;
> + };
> + };
> +
> + primary-dai-link-1 {
> + link-name = "fsd-primary-1";
> + dai-format = "i2s";
> + tesla,bitclock-master = <&tdm_1>;
> + tesla,frame-master = <&tdm_1>;
> + cpu {
> + sound-dai = <&tdm_1 0>;
> + };
> + };
> +
> + secondary-dai-link-1 {
> + link-name = "fsd-secondary-1";
> + dai-format = "i2s";
> + tesla,bitclock-master = <&tdm_1>;
> + tesla,frame-master = <&tdm_1>;
> + cpu {
> + sound-dai = <&tdm_1 1>;
> + };
> + };
> + };
> --
> 2.17.1
>
>
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