linux-kernel - Re: [PATCH 2/2] dt-bindings: dsp: mediatek: add mt8196 dsp document

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Message-ID: <20250320-divergent-soft-bird-bcd938@krzk-bin>
Date: Thu, 20 Mar 2025 08:49:36 +0100
From: Krzysztof Kozlowski <krzk@...nel.org>
To: "hailong.fan" <hailong.fan@...iatek.com>
Cc: Rob Herring <robh@...nel.org>, 
	Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>, 
	Matthias Brugger <matthias.bgg@...il.com>, 
	AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>, Liam Girdwood <lgirdwood@...il.com>, 
	Peter Ujfalusi <peter.ujfalusi@...ux.intel.com>, Bard Liao <yung-chuan.liao@...ux.intel.com>, 
	Ranjani Sridharan <ranjani.sridharan@...ux.intel.com>, Daniel Baluta <daniel.baluta@....com>, 
	Kai Vehmanen <kai.vehmanen@...ux.intel.com>, Pierre-Louis Bossart <pierre-louis.bossart@...ux.dev>, 
	Mark Brown <broonie@...nel.org>, Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.com>, 
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
	linux-arm-kernel@...ts.infradead.org, linux-mediatek@...ts.infradead.org, 
	sound-open-firmware@...a-project.org, linux-sound@...r.kernel.org, 
	Project_Global_Chrome_Upstream_Group@...iatek.com, Jjian.Zhou@...iatek.com, Xiangzhi.Tang@...iatek.com
Subject: Re: [PATCH 2/2] dt-bindings: dsp: mediatek: add mt8196 dsp document

On Thu, Mar 20, 2025 at 11:17:25AM +0800, hailong.fan wrote:
> This patch adds mt8196 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: hailong.fan <hailong.fan@...iatek.com>

Don't use login as full name, but proper Latin-alphabet transcription or
original name in UTF.

This cannot be tested due to dependency, so limited review.

> ---
>  .../bindings/dsp/mediatek,mt8196-dsp.yaml     | 96 +++++++++++++++++++

Don't grow dsp directory. Either this is remoteproc or some sound
component, so place it accordingly.

>  1 file changed, 96 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/dsp/mediatek,mt8196-dsp.yaml
> 
> diff --git a/Documentation/devicetree/bindings/dsp/mediatek,mt8196-dsp.yaml b/Documentation/devicetree/bindings/dsp/mediatek,mt8196-dsp.yaml
> new file mode 100644
> index 000000000000..62bcd97bd0f4
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/dsp/mediatek,mt8196-dsp.yaml
> @@ -0,0 +1,96 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/dsp/mediatek,mt8196-dsp.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Mediatek mt8196 DSP core
> +
> +maintainers:
> +  - Hailong Fan <hailong.fan@...iatek.com>
> +
> +description: |

Do not need '|' unless you need to preserve formatting.

> +  Some boards from mt8196 contain a DSP core used for

Boards or MT8196? If boards, how is this related to SoC in the first
place? Thus wrong compatible.

> +  advanced pre- and post- audio processing.
> +
> +properties:
> +  compatible:
> +    const: mediatek,mt8196-dsp

If this is part of the SoC, then wrong description.

> +
> +  reg:
> +    items:
> +      - description: Address and size of the DSP Cfg registers

s/Address and size of the//

Write concise and accurate description. This cannot be anything else, so
no need to state obvious.

> +      - 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 dsp clock
> +      - description: 26M clock
> +      - description: ADSP PLL clock
> +
> +  clock-names:
> +    items:
> +      - const: adsp_sel
> +      - const: clk26m
> +      - const: adsppll
> +
> +  power-domains:
> +    maxItems: 1
> +
> +  mboxes:
> +    items:
> +      - description: mailbox for receiving audio DSP requests.
> +      - description: mailbox for transmitting requests to audio DSP.
> +
> +  mbox-names:
> +    items:
> +      - const: rx
> +      - const: tx
> +
> +  memory-region:
> +    items:
> +      - description: dma buffer between host and DSP.
> +      - description: DSP system memory.
> +
> +required:
> +  - compatible
> +  - reg
> +  - reg-names
> +  - clocks
> +  - clock-names
> +  - power-domains
> +  - mbox-names
> +  - mboxes
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/clock/mt8196-clk.h>
> +    #include <dt-bindings/power/mt8196-power.h>
> +    adsp: adsp@...00000 {

Drop unused label

> +        compatible = "mediatek,mt8196-dsp";
> +        reg = <0x1a000000 0x5000>,
> +              <0x1a210000 0x80000>,
> +              <0x1a345000 0x300>,
> +              <0x1a00f000 0x1000>;
> +        reg-names = "cfg", "sram", "sec", "bus";
> +        power-domains = <&scpsys MT8196_POWER_DOMAIN_ADSP_TOP_DORMANT>;
> +        clocks = <&cksys_clk CLK_CK_ADSP_SEL>,
> +                 <&cksys_clk CLK_CK_TCK_26M_MX9>,
> +                 <&cksys_clk CLK_CK_ADSPPLL>;
> +        clock-names = "adsp_sel",
> +                      "clk26m",
> +                      "adsppll";
> +        mbox-names = "rx", "tx";
> +        mboxes = <&adsp_mailbox0>, <&adsp_mailbox1>;

Reverse order of mboxes and mbox-names properties. xxx-names follows the
xxx.

Best regards,
Krzysztof