linux-kernel - Re: [PATCH v5] dt-bindings: dsp: mediatek: Add mt8195 DSP binding support

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Date:   Fri, 12 Nov 2021 14:15:13 -0600
From:   Rob Herring <robh@...nel.org>
To:     YC Hung <yc.hung@...iatek.com>
Cc:     broonie@...nel.org, tiwai@...e.com, matthias.bgg@...il.com,
        alsa-devel@...a-project.org, linux-mediatek@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, daniel.baluta@....com,
        trevor.wu@...iatek.com, allen-kh.cheng@...iatek.com,
        angelogioacchino.delregno@...labora.com
Subject: Re: [PATCH v5] dt-bindings: dsp: mediatek: Add mt8195 DSP binding
 support

On Wed, Nov 03, 2021 at 06:26:08PM +0800, YC Hung wrote:
> From: "yc.hung" <yc.hung@...iatek.com>
> 
> This describes the mt8195 DSP device tree node.
> 
> Signed-off-by: yc.hung <yc.hung@...iatek.com>
> ---
> Changes since v4:
>   - remove patch 1 with clocks as it will be reviewed and merged to SOF tree.
>     https://github.com/thesofproject/linux/pull/3237
>   - refine DT file binding files with Rob's comments.
> 
>  .../bindings/dsp/mtk,mt8195-dsp.yaml          | 142 ++++++++++++++++++
>  1 file changed, 142 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/dsp/mtk,mt8195-dsp.yaml
> 
> diff --git a/Documentation/devicetree/bindings/dsp/mtk,mt8195-dsp.yaml b/Documentation/devicetree/bindings/dsp/mtk,mt8195-dsp.yaml
> new file mode 100644
> index 000000000000..aeeb7af69625
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/dsp/mtk,mt8195-dsp.yaml
> @@ -0,0 +1,142 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/dsp/mtk,mt8195-dsp.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Mediatek mt8195 DSP core
> +
> +maintainers:
> +  - YC Hung <yc.hung@...iatek.com>
> +
> +description: |
> +  Some boards from mt8195 contain a DSP core used for
> +  advanced pre- and post- audio processing.
> +properties:
> +  compatible:
> +    const: mediatek,mt8195-dsp
> +
> +  reg:
> +    items:
> +      - description: Address and size of the DSP Cfg registers
> +      - description: Address and size of the DSP SRAM
> +
> +  reg-names:
> +    items:
> +      - const: cfg
> +      - const: sram
> +
> +  interrupts:
> +    items:
> +      - description: watchdog interrupt
> +
> +  interrupt-names:
> +    items:
> +      - const: wdt
> +
> +  clocks:
> +    items:
> +      - description: mux for audio dsp clock
> +      - description: 26M clock
> +      - description: mux for audio dsp local bus
> +      - description: default audio dsp local bus clock source
> +      - description: clock gate for audio dsp clock
> +      - description: mux for audio dsp access external bus
> +
> +  clock-names:
> +    items:
> +      - const: adsp_sel
> +      - const: clk26m_ck
> +      - const: audio_local_bus
> +      - const: mainpll_d7_d2
> +      - const: scp_adsp_audiodsp
> +      - const: audio_h
> +
> +  power-domains:
> +    maxItems: 1
> +
> +  mboxes:
> +    items:
> +      - description: a mailbox is ised for ipc reply between host and audio DSP.
> +      - description: a mailbox is ised for ipc reuqest between host and audio DSP.
> +
> +  mbox-names:
> +    items:
> +      - const: mbox0
> +      - const: mbox1
> +
> +  memory-region:      
> +    items:
> +      - description: A phandle to a reserved memory region is used for dma buffer between host and DSP.   
> +      - description: A phandle to a reserved memory region is used for DSP system memory.
> +
> +  sound:
> +    description:
> +      Sound subnode includes ASoC platform, DPTx codec node, and
> +      HDMI codec node.
> +
> +    type: object

Same question as v4, why do you need a sub-node here. Just move these 
properties up a level.

> +
> +    properties:
> +      mediatek,platform:
> +        $ref: "/schemas/types.yaml#/definitions/phandle"
> +        description: The phandle of MT8195 ASoC platform.
> +
> +      mediatek,dptx-codec:
> +        $ref: "/schemas/types.yaml#/definitions/phandle"
> +        description: The phandle of MT8195 Display Port Tx codec node.
> +
> +      mediatek,hdmi-codec:
> +        $ref: "/schemas/types.yaml#/definitions/phandle"
> +        description: The phandle of MT8195 HDMI codec node.