Re: [PATCH v4 2/2] dt-bindings: dsp: mediatek: Add mt8195 DSP binding support

[Rob Herring <robh@kernel.org>]

On Thu, Oct 28, 2021 at 09:57:37PM +0800, YC Hung wrote:
> This describes the mt8195 DSP device tree node.
> 
> Signed-off-by: YC Hung <yc.hung@mediatek.com>
> ---
>  .../bindings/dsp/mtk,mt8195-dsp.yaml          | 139 ++++++++++++++++++
>  1 file changed, 139 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..f113f71ca094
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/dsp/mtk,mt8195-dsp.yaml
> @@ -0,0 +1,139 @@
> +# 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@mediatek.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:
> +    maxItems: 2
> +
> +  reg-names:
> +    maxItems: 2

Need to define what each entry is and the names for them.

> +
> +  interrupts:
> +    maxItems: 1
> +
> +  interrupt-names:
> +    maxItems: 1

Need to define the name. Though -names with 1 entry is not that useful.

> +
> +  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:
> +    maxItems: 2
> +
> +  mbox-names:
> +    description:
> +      Specifies the mailboxes used to communicate with audio DSP
> +    items:
> +      - const: mbox0
> +      - const: mbox1

Is there not a specific function for each mailbox? You already have an 
index implicitly.

> +
> +  memory-region:
> +    description:
> +      phandle to a node describing reserved memory (System RAM memory)
> +      used by DSP (see bindings/reserved-memory/reserved-memory.txt)
> +    maxItems: 2

1 phandle or 2? If 2, what is each one for?

> +
> +  sound:
> +    description:
> +      Sound subnode includes ASoC platform, DPTx codec node, and
> +      HDMI codec node.
> +
> +    type: object

       additionalProperties: false

Though why do you need a child node here in the first place?

> +
> +    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.
> +
> +required:
> +  - compatible
> +  - reg
> +  - reg-names
> +  - interrupts
> +  - interrupt-names
> +  - clocks
> +  - clock-names
> +  - memory-region
> +  - power-domains
> +  - mbox-names
> +  - mboxes
> +  - sound
> +
> +

Extra blank line.

> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/interrupt-controller/arm-gic.h>
> +    #include <dt-bindings/interrupt-controller/irq.h>
> +    adsp: adsp@10803000 {

dsp@...

> +       compatible =  "mediatek,mt8195-dsp";
> +       reg = <0x10803000  0x1000>,
> +             <0x10840000  0x40000>;
> +       reg-names = "cfg", "sram";
> +       interrupts = <GIC_SPI 694 IRQ_TYPE_LEVEL_HIGH 0>;
> +       interrupt-names = "wdt";
> +       clocks = <&topckgen 10>, //CLK_TOP_ADSP
> +                <&clk26m>,
> +                <&topckgen 107>, //CLK_TOP_AUDIO_LOCAL_BUS
> +                <&topckgen 136>, //CLK_TOP_MAINPLL_D7_D2
> +                <&scp_adsp 0>, //CLK_SCP_ADSP_AUDIODSP
> +                <&topckgen 34>; //CLK_TOP_AUDIO_H
> +       clock-names = "adsp_sel",
> +                     "clk26m_ck",
> +                     "audio_local_bus",
> +                     "mainpll_d7_d2",
> +                     "scp_adsp_audiodsp",
> +                     "audio_h";
> +       memory-region = <&adsp_dma_mem_reserved>,
> +                       <&adsp_mem_reserved>;
> +       power-domains = <&spm 6>; //MT8195_POWER_DOMAIN_ADSP
> +       mbox-names = "mbox0", "mbox1";
> +       mboxes = <&adsp_mailbox 0>, <&adsp_mailbox 1>;
> +       status = "disabled";

Don't disable your example. Drop status.

> +       sound {
> +              mediatek,dptx-codec = <&dp_tx>;
> +              mediatek,hdmi-codec = <&hdmi0>;
> +              mediatek,platform = <&afe>;
> +             };
> +       };
> -- 
> 2.18.0
> 
>