linux-kernel - Re: [PATCH v2 3/3] dt-bindings: dsp: mediatek: add mt8186 dsp document

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Date:   Wed, 15 Jun 2022 10:32:43 -0700
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Tinghan Shen <tinghan.shen@...iatek.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Mark Brown <broonie@...nel.org>,
        YC Hung <yc.hung@...iatek.com>,
        Curtis Malainey <cujomalainey@...omium.org>,
        Allen-KH Cheng <allen-kh.cheng@...iatek.com>
Cc:     devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Project_Global_Chrome_Upstream_Group@...iatek.com
Subject: Re: [PATCH v2 3/3] dt-bindings: dsp: mediatek: add mt8186 dsp
 document

On 09/06/2022 01:31, Tinghan Shen wrote:
> This patch adds mt8186 dsp document. The dsp is used for Sound Open
> Firmware driver node. It includes registers, clocks, memory regions,
> and mailbox for dsp.
> 
> Signed-off-by: Tinghan Shen <tinghan.shen@...iatek.com>
> ---
>  .../bindings/dsp/mediatek,mt8186-dsp.yaml     | 91 +++++++++++++++++++
>  1 file changed, 91 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/dsp/mediatek,mt8186-dsp.yaml
> 
> diff --git a/Documentation/devicetree/bindings/dsp/mediatek,mt8186-dsp.yaml b/Documentation/devicetree/bindings/dsp/mediatek,mt8186-dsp.yaml
> new file mode 100644
> index 000000000000..33c78f89d296
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/dsp/mediatek,mt8186-dsp.yaml
> @@ -0,0 +1,91 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/dsp/mediatek,mt8186-dsp.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: MediaTek mt8186 DSP core
> +
> +maintainers:
> +  - Tinghan Shen <tinghan.shen@...iatek.com>
> +
> +description: |
> +  MediaTek mt8186 SoC contains a DSP core used for
> +  advanced pre- and post- audio processing.
> +
> +properties:
> +  compatible:
> +    const: mediatek,mt8186-dsp
> +
> +  reg:
> +    items:
> +      - description: Address and size of the DSP config registers
> +      - description: Address and size of the DSP SRAM
> +      - description: Address and size of the DSP secure registers
> +      - description: Address and size of the DSP bus registers
> +
> +  reg-names:
> +    items:
> +      - const: cfg
> +      - const: sram
> +      - const: sec
> +      - const: bus
> +
> +  clocks:
> +    items:
> +      - description: mux for audio dsp clock
> +      - description: mux for audio dsp local bus
> +
> +  clock-names:
> +    items:
> +      - const: audiodsp
> +      - const: adsp_bus
> +
> +  power-domains:
> +    maxItems: 1
> +
> +  mboxes:
> +    items:
> +      - description: ipc reply between host and audio DSP.
> +      - description: ipc request between host and audio DSP.

"IPC request between" does not specify who sends the request. Host or DSP?

See existing bindings for some better examples, e.g.:
Documentation/devicetree/bindings/serial/nvidia,tegra194-tcu.yaml
which clearly states who receives from who.

> +
> +  mbox-names:
> +    items:
> +      - const: rep
> +      - const: req

tx/rx




Best regards,
Krzysztof