From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7965427732; Wed, 29 Jul 2026 11:40:33 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785325235; cv=none; b=c+WFmx95wZ2RfX1/G9+J6JZMtcqIUAore3fn5QdIqoWmuZYTAABc7iUJTGTN3q4qIac7BhHeo6kD1e+qU/J15sU6rBX54zErtlYMtSr2OPFnzHAYhdVgh1D/akw+JsXDrwMPeEBuep0e7G9P9dCRW6Rgxed/mCBA2UaHOTHae6o= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785325235; c=relaxed/simple; bh=VM3h0RywmyUIUsx6KslBy8ZIWCU7iukzdNJEx5aJCO8=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=KnR6FS4cGpyQeWDG4bvEPdbXTHfVzPRjCrVWp1Ib4UFQNx64N1tY48FVDu+zUjtP+7N2AiwWDIgBWLVlnYNbEmDPvHsBBiAF1mXBBcDOUyYT9Z2G2APdh0JFiqMZFEW8GhHUSRi04YDDE0zzHInySFq4hRrcG9JbQ6RqmZJLqoY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=TSL96bqB; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="TSL96bqB" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 90CD01F000E9; Wed, 29 Jul 2026 11:40:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1785325232; bh=gd9feqrDoNJUw6NO1CcIvNjiMFzuYqKGLrbTqWwnmUo=; h=Date:Subject:To:Cc:References:From:In-Reply-To; b=TSL96bqBO6eCqo9wVjtdiQbfFabsERoK2wduUtmXWLOsuHDBFS/4DQW/WD36iCYiR +7XdNvV8COROTSZhN3UcDmQP4XnPH5UfrmXzAQdo1un2oiZ+SMeno05aCSYZlviT1n rLyqWGiuNvKVdDc5SwgNb6abiloLq1k8GvQra78e6UMgTLdU9L21eBLCyfBD6notnY qkBPUYrrQ2qvSvXlP3mmKOPI88aXxUerEAhChwSedmFZvVQ8/P/1NpD1PLZA1bel6/ fFDjgTW29OX82QUPupe9GqEAu7BhasX2+POLqwlCnk0gB/f1N7HMOj6S3xJ8QlWUJ8 iFe9ckVX0NQaw== Message-ID: <219d44e2-28ed-4c54-bd00-66e687a0ba48@kernel.org> Date: Wed, 29 Jul 2026 13:40:22 +0200 Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [RFC PATCH 7/8] dt-bindings: sound: qcom: add Tambora WCD9378 SDCA codec To: Srinivas Kandagatla , Mark Brown , Liam Girdwood , Jaroslav Kysela , Takashi Iwai , Charles Keepax , Maciej Strozek , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Srinivas Kandagatla Cc: Bard Liao , Pierre-Louis Bossart , Richard Fitzgerald , Jorijn van der Graaf , linux-sound@vger.kernel.org, linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, patches@opensource.cirrus.com, linux-kernel@vger.kernel.org References: <20260722234221.884765-1-srinivas.kandagatla@oss.qualcomm.com> <20260722234221.884765-8-srinivas.kandagatla@oss.qualcomm.com> From: Krzysztof Kozlowski Content-Language: en-US Autocrypt: addr=krzk@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit On 23/07/2026 01:42, Srinivas Kandagatla wrote: > Describe the WCD9378 SDCA peripheral node (compatible sdw20217011000) > driven by the wcd9378-sdca codec driver for headphone playback, headset > mic capture and jack detection via the SimpleJack SDCA function type. > > WCD9378 codec can be wired up in 2 different modes. > "mobile mode" on phone/tablet SoCs is enumerated as tx and rx device, > each of which has dedicated control and data lines. > "compute mode" on compute platforms such as Glymur is enumerated as > single standard MIPI SDCA class device. > > Both modes share same Device ID, compatible; qcom,compute-mode selects > which driver path is taken. Supplies, reset GPIO and mic-bias voltages > live on the SoundWire slave node in compute mode and are forbidden in > mobile mode (owned by the top-level codec parent there). > > Assisted-by: Claude:claude-opus-4-7 > Signed-off-by: Srinivas Kandagatla > --- > .../bindings/sound/qcom,wcd9378-sdw.yaml | 200 ++++++++++++++++++ > 1 file changed, 200 insertions(+) > create mode 100644 Documentation/devicetree/bindings/sound/qcom,wcd9378-sdw.yaml > > diff --git a/Documentation/devicetree/bindings/sound/qcom,wcd9378-sdw.yaml b/Documentation/devicetree/bindings/sound/qcom,wcd9378-sdw.yaml > new file mode 100644 > index 000000000000..2ed4ad92958e > --- /dev/null > +++ b/Documentation/devicetree/bindings/sound/qcom,wcd9378-sdw.yaml > @@ -0,0 +1,200 @@ > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) > +%YAML 1.2 > +--- > +$id: http://devicetree.org/schemas/sound/qcom,wcd9378-sdw.yaml# > +$schema: http://devicetree.org/meta-schemas/core.yaml# > + > +title: Qualcomm SoundWire Slave devices on WCD9378 > + > +maintainers: > + - Jorijn van der Graaf > + - Srinivas Kandagatla > + > +description: | > + The Qualcomm WCD9378 codec presents its SoundWire slave devices with > + class ID sdw20217011000 in both operating modes: > + > + * mobile mode -- two slave instances sit on separate SoundWire > + masters carrying data only. A separate top-level codec node > + owns the codec's supplies, mic-bias voltages and reset GPIO. > + > + * SDCA / compute mode -- one aggregated slave sits on a multi-lane > + master and carries both control and data. There is no separate > + top-level codec node, so the SoundWire slave node itself owns > + supplies, reset GPIO and mic-bias voltage configuration. It is > + marked with qcom,compute-mode. > + > + Codec drivers that match sdw20217011000 use qcom,compute-mode to > + decide which mode to serve; the presence or absence of this property > + also gates whether the supply and mic-bias properties on this node > + are required or forbidden. > + > +properties: > + compatible: > + const: sdw20217011000 > + > + reg: > + maxItems: 1 > + > + qcom,compute-mode: > + description: | > + Marks this SoundWire slave as the single aggregated slave that > + implements the codec in SDCA / compute mode. Only present when > + the codec has no separate top-level codec parent; in that case > + this slave node also owns the codec's supplies, reset GPIO and > + mic-bias voltage configuration. Absent in mobile mode. I doubt there is really "compute" or "mobile" mode, so you just wrote to match use case, but that does not match hardware. I think there should be no separate top-level codec parent in the first place, thus this property is not needed. You always list here all resources. Best regards, Krzysztof