linux-kernel - Re: [PATCH v5 1/4] ASoC: dt-bindings: wcd937x-sdw: Add static channel mapping support

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Message-ID: <iuuxejlzes23ju4oy2m27oen2bhrenyuouq37ktvmiheoy7ow6@w6oqzh4bj4v6>
Date: Fri, 13 Dec 2024 09:53:55 +0100
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Mohammad Rafi Shaik <quic_mohs@...cinc.com>
Cc: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>, 
	Liam Girdwood <lgirdwood@...il.com>, Mark Brown <broonie@...nel.org>, Rob Herring <robh@...nel.org>, 
	Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>, 
	Vinod Koul <vkoul@...nel.org>, Bard Liao <yung-chuan.liao@...ux.intel.com>, 
	Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.com>, 
	Pierre-Louis Bossart <pierre-louis.bossart@...ux.dev>, Sanyog Kale <sanyog.r.kale@...el.com>, 
	linux-arm-msm@...r.kernel.org, linux-sound@...r.kernel.org, devicetree@...r.kernel.org, 
	linux-kernel@...r.kernel.org, quic_pkumpatl@...cinc.com, kernel@...cinc.com
Subject: Re: [PATCH v5 1/4] ASoC: dt-bindings: wcd937x-sdw: Add static
 channel mapping support

On Thu, Dec 12, 2024 at 09:53:31PM +0530, Mohammad Rafi Shaik wrote:
> Add static channel mapping between master and slave rx/tx ports for
> Qualcomm wcd937x soundwire codec.
> 
> Currently, the channel map index value for each soundwire port is
> hardcoded in the wcd937x-sdw driver, and the same channel map index
> value is configured in the soundwire master.
> 
> The Qualcomm board like the QCM6490-IDP require static channel map
> settings for the soundwire master and slave ports.
> 
> If another boards which are using enable wcd937x, the channel mapping
> index values between master and slave may be different depending on the
> board hw design and requirements. If the above properties are not used
> in a SoC specific device tree, the channel mapping index values are set
> to default.
> 
> With the introduction of the following channel mapping properties, it is
> now possible to configure the master channel mapping directly from the
> device tree.
> 
> The qcom,tx-channel-mapping property specifies the static channel mapping
> between the slave and master tx ports in the order of slave port channels
> which is adc1, adc2, adc3, adc4, dmic0, dmic1, mbhc, dmic2, dmic3, dmci4,
> dmic5, dmic6, dmic7.
> 
> The qcom,rx-channel-mapping property specifies the static channel mapping
> between the slave and master rx ports in the order of slave port channels
> which is hph_l, hph_r, clsh, comp_l, comp_r, lo, dsd_r, dsd_l.
> 
> Signed-off-by: Mohammad Rafi Shaik <quic_mohs@...cinc.com>
> ---
>  .../bindings/sound/qcom,wcd937x-sdw.yaml      | 36 +++++++++++++++++++
>  1 file changed, 36 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/sound/qcom,wcd937x-sdw.yaml b/Documentation/devicetree/bindings/sound/qcom,wcd937x-sdw.yaml
> index d3cf8f59cb23..c8543f969ebb 100644
> --- a/Documentation/devicetree/bindings/sound/qcom,wcd937x-sdw.yaml
> +++ b/Documentation/devicetree/bindings/sound/qcom,wcd937x-sdw.yaml
> @@ -58,6 +58,40 @@ properties:
>      items:
>        enum: [1, 2, 3, 4, 5]
>  
> +  qcom,tx-channel-mapping:
> +    description: |
> +      Specifies static channel mapping between slave and master tx port
> +      channels.
> +      In the order of slave port channels which is adc1, adc2, adc3,
> +      dmic0, dmic1, mbhc, dmic2, dmic3, dmci4, dmic5, dmic6, dmic7.
> +    $ref: /schemas/types.yaml#/definitions/uint8-array
> +    minItems: 12
> +    maxItems: 12
> +    additionalItems: false
> +    items:
> +      enum:
> +        - 1  # WCD9370_SWRM_CH1
> +        - 2  # WCD9370_SWRM_CH2
> +        - 3  # WCD9370_SWRM_CH3
> +        - 4  # WCD9370_SWRM_CH4

I asked to drop the comments, because now they are obvious. 1 is channel
1, obviously. Your description should say what are the values here:
channels on the WCD9370 or Soundwire master device side.

Anyway, if it is understable to Mark, then I am happy as well:

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>

Best regards,
Krzysztof