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

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Message-ID: <a72988212d0d95bfe76eb9c53bbdb8c57c989377.camel@mediatek.com>
Date: Fri, 21 Mar 2025 06:19:28 +0000
From: Hailong Fan (范海龙) <Hailong.Fan@...iatek.com>
To: "krzk@...nel.org" <krzk@...nel.org>
CC: "perex@...ex.cz" <perex@...ex.cz>, "linux-kernel@...r.kernel.org"
	<linux-kernel@...r.kernel.org>, Jjian Zhou (周建)
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	Xiangzhi Tang (唐相志)
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Subject: Re: [PATCH 2/2] dt-bindings: dsp: mediatek: add mt8196 dsp document

On Thu, 2025-03-20 at 08:49 +0100, Krzysztof Kozlowski wrote:
> External email : Please do not click links or open attachments until
> you have verified the sender or the content.
> 
> 
> 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.
Will fix in v2, thx.
> 
> > ---
> >  .../bindings/dsp/mediatek,mt8196-dsp.yaml     | 96
> > +++++++++++++++++++
> 
> Don't grow dsp directory. Either this is remoteproc or some sound
> component, so place it accordingly.
This is a reference to the approach used in a previous MediaTek
project:

https://web.git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/tree/Documentation/devicetree/bindings/dsp
Do we need to move all the files under the DSP directory to the sound
directory?
> 
> >  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
> > +---
> > +$id: 
> > https://urldefense.com/v3/__http://devicetree.org/schemas/dsp/mediatek,mt8196-dsp.yaml*__;Iw!!CTRNKA9wMg0ARbw!j4BSCn2ciKI2gdoQgLFTB0YUey5u6HieRa6NvWQvaF7X_mEEyHhCIslrFYGBOYEbWLaE2J5kDORlxRI$
> > +$schema: 
> > https://urldefense.com/v3/__http://devicetree.org/meta-schemas/core.yaml*__;Iw!!CTRNKA9wMg0ARbw!j4BSCn2ciKI2gdoQgLFTB0YUey5u6HieRa6NvWQvaF7X_mEEyHhCIslrFYGBOYEbWLaE2J5k8T-XN8U$
> > +
> > +title: Mediatek mt8196 DSP core
> > +
> > +maintainers:
> > +  - Hailong Fan <hailong.fan@...iatek.com>
> > +
> > +description: |
> 
> Do not need '|' unless you need to preserve formatting.
Will update in v2, thx.
> 
> > +  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.
Sure, it will be updated in V2 as follows: 
MediaTek mt8196 SoC contains a DSP core used for
advanced pre- and post- audio processing.
> 
> > +
> > +  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.
Will update in v2, thx.
> 
> > +      - 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
Will update in v2, thx.
> 
> > +        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.
Will update in v2, thx.
> 
> Best regards,
> Krzysztof
> M