From patchwork Tue Dec 14 14:20:47 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stephan Gerhold X-Patchwork-Id: 523737 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id AD4B6C43217 for ; Tue, 14 Dec 2021 14:22:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234890AbhLNOWs (ORCPT ); Tue, 14 Dec 2021 09:22:48 -0500 Received: from mo4-p02-ob.smtp.rzone.de ([85.215.255.83]:30551 "EHLO mo4-p02-ob.smtp.rzone.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230268AbhLNOWr (ORCPT ); Tue, 14 Dec 2021 09:22:47 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; t=1639491755; s=strato-dkim-0002; d=gerhold.net; h=References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Cc:Date: From:Subject:Sender; bh=z2GjOJisdAbabtu8mFVDMyV6/eqKuOCfC207QQYIfb8=; b=awM/icih3+mO5ims3FKIACYm9G4aoaBtPRq5PgwE6Eic+I8RojlL9gCLG7aDqCpTIn Jjdgbfd9FNIHTiR3FKLZhtMWNglZMKai/CpfoN3CyyL32u6IhB61OinpbapwU3bfc5g9 KJJqGQ5l62KHGNLrqG25MyangAfXCy0uVRORrNUS8i/soWa30txwwRm7tkBsuzbxNjFa 7sZXpTNQtjjEqF+E57OzQoOirdk8BAZNXPKef1O3AfsGzMDQg/4OsjROKSX2DRAcXxV3 +UKqbs8dKieQd6jqOVIieiv8PLxl0jqYEgRo4H7ewSd+gzK5h42fXUZod/SBu3z5wINB ktPQ== Authentication-Results: strato.com; dkim=none X-RZG-AUTH: ":P3gBZUipdd93FF5ZZvYFPugejmSTVR2nRPhVORvLd4SsytBXQ7UOGqRde+a0fiL1O/hR" X-RZG-CLASS-ID: mo00 Received: from droid.. by smtp.strato.de (RZmta 47.35.3 AUTH) with ESMTPSA id x08baexBEEMZ8rX (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256 bits)) (Client did not present a certificate); Tue, 14 Dec 2021 15:22:35 +0100 (CET) From: Stephan Gerhold To: Mark Brown Cc: Liam Girdwood , Srinivas Kandagatla , Banajit Goswami , Bjorn Andersson , Andy Gross , Rob Herring , linux-arm-msm@vger.kernel.org, alsa-devel@alsa-project.org, devicetree@vger.kernel.org, phone-devel@vger.kernel.org, ~postmarketos/upstreaming@lists.sr.ht, Paul Cercueil , Kuninori Morimoto , Vincent Knecht , Stephan Gerhold Subject: [PATCH 2/4] ASoC: dt-bindings: qcom: sm8250: Document "pin-switches" and "widgets" Date: Tue, 14 Dec 2021 15:20:47 +0100 Message-Id: <20211214142049.20422-3-stephan@gerhold.net> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20211214142049.20422-1-stephan@gerhold.net> References: <20211214142049.20422-1-stephan@gerhold.net> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Some sound card setups might require extra pin switches to allow turning off certain audio components. There are two real examples for this in smartphones/tablets based on MSM8916: 1. Analog speaker amplifiers connected to headphone outputs. The MSM8916 analog codec does not have a separate "Line Out" port so some devices have an analog speaker amplifier connected to one of the headphone outputs. A pin switch is necessary to allow playback on headphones without also activating the speaker. 2. External speaker codec also used as earpiece. Some smartphones have two front-facing (stereo) speakers that can be also configured to act as an earpiece during voice calls. A pin switch is needed to allow disabling the second speaker during voice calls. There are existing bindings that allow setting up such pin switches in simple-card.yaml. Document the same for Qcom sound cards. One variant of example 1 above is added to the examples in the DT schema: There is an analog speaker amplifier connected to the HPH_R (right headphone channel) output. Adding a "Speaker" pin switch and widget allows turning off the speaker when audio should be only played via the connected headphones. Cc: Srinivas Kandagatla Signed-off-by: Stephan Gerhold Acked-by: Rob Herring --- .../devicetree/bindings/sound/qcom,sm8250.yaml | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/Documentation/devicetree/bindings/sound/qcom,sm8250.yaml b/Documentation/devicetree/bindings/sound/qcom,sm8250.yaml index e50964c54bb9..4bfda04b4608 100644 --- a/Documentation/devicetree/bindings/sound/qcom,sm8250.yaml +++ b/Documentation/devicetree/bindings/sound/qcom,sm8250.yaml @@ -39,6 +39,14 @@ properties: $ref: /schemas/types.yaml#/definitions/string description: User visible long sound card name + pin-switches: + description: List of widget names for which pin switches should be created. + $ref: /schemas/types.yaml#/definitions/string-array + + widgets: + description: User specified audio sound widgets. + $ref: /schemas/types.yaml#/definitions/non-unique-string-array + # Only valid for some compatibles (see allOf if below) reg: true reg-names: true @@ -251,7 +259,15 @@ examples: reg-names = "mic-iomux", "spkr-iomux"; model = "msm8916"; + widgets = + "Speaker", "Speaker", + "Headphone", "Headphones"; + pin-switches = "Speaker"; audio-routing = + "Speaker", "Speaker Amp OUT", + "Speaker Amp IN", "HPH_R", + "Headphones", "HPH_L", + "Headphones", "HPH_R", "AMIC1", "MIC BIAS Internal1", "AMIC2", "MIC BIAS Internal2", "AMIC3", "MIC BIAS Internal3";