Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
Message-ID: <e8d854c0-e2a5-2382-4b54-c5e879170324@linaro.org>
Date:   Thu, 26 May 2022 08:49:39 +0200
MIME-Version: 1.0
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101
 Thunderbird/91.9.1
Subject: Re: [PATCH v2] ASoC: dt-bindings: mediatek: mt8192: Add i2s-share
 properties
Content-Language: en-US
To:     =?UTF-8?B?TsOtY29sYXMgRi4gUi4gQS4gUHJhZG8=?= 
        <nfraprado@collabora.com>, Mark Brown <broonie@kernel.org>
Cc:     kernel@collabora.com,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@collabora.com>,
        Jiaxin Yu <jiaxin.yu@mediatek.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        Liam Girdwood <lgirdwood@gmail.com>,
        Matthias Brugger <matthias.bgg@gmail.com>,
        Rob Herring <robh+dt@kernel.org>,
        Shane Chien <shane.chien@mediatek.com>,
        alsa-devel@alsa-project.org, devicetree@vger.kernel.org,
        linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org,
        linux-mediatek@lists.infradead.org
References: <20220509205847.607076-1-nfraprado@collabora.com>
From:   Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
In-Reply-To: <20220509205847.607076-1-nfraprado@collabora.com>
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Precedence: bulk

On 09/05/2022 22:58, Nícolas F. R. A. Prado wrote:
> The Mediatek AFE PCM controller for MT8192 allows two I2S interfaces to
> share the same clock and act as a single interface with both input and
> output. Add patterns for these properties in the dt-binding. The
> property is split into two patterns in order to allow all valid
> interface pairings.
> 
> Signed-off-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>
> 
> ---
> The series from v1 of this patch was merged although some changes were
> still needed in this patch, so the v1 of this patch was reverted [1] and
> this standalone commit addresses the feedback from v1 and readds the
> property.
> 
> [1] https://lore.kernel.org/all/20220509185625.580811-1-nfraprado@collabora.com
> 
> v1: https://lore.kernel.org/all/20220429203039.2207848-2-nfraprado@collabora.com/
> 
> Changes in v2:
> - Added "mediatek," prefix to property
> - Rewrote and added more information to property description
> - Split into two patterns to validate that output-input pairings are
>   done
> 
>  .../bindings/sound/mt8192-afe-pcm.yaml           | 16 ++++++++++++++++
>  1 file changed, 16 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/sound/mt8192-afe-pcm.yaml b/Documentation/devicetree/bindings/sound/mt8192-afe-pcm.yaml
> index 7a25bc9b8060..2abf43c6c2c3 100644
> --- a/Documentation/devicetree/bindings/sound/mt8192-afe-pcm.yaml
> +++ b/Documentation/devicetree/bindings/sound/mt8192-afe-pcm.yaml
> @@ -54,6 +54,22 @@ properties:
>        - const: aud_infra_clk
>        - const: aud_infra_26m_clk
>  
> +patternProperties:
> +  "^mediatek,i2s[13579]-share$":
> +    description:
> +      Each I2S interface has a single data line, input if its index is even or
> +      output if the index is odd. An input and an output I2S interface can be
> +      used together as if they were a single I2S interface with both input and
> +      output data lines by sharing the same clock. This property represents this
> +      pairing. The value should be the name of the interface whose clock is
> +      used, and the property name the other interface that depends on this
> +      clock.
> +    pattern: "^I2S[0268]$"
> +
> +  "^mediatek,i2s[0268]-share$":
> +    description: Same as above.
> +    pattern: "^I2S[13579]$"

Rob's question is still valid - why these are not phandles?

In any case you miss $ref.


Best regards,
Krzysztof