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[94.59.215.181]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-48066be77b5sm74577805e9.2.2026.01.27.11.08.39 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 27 Jan 2026 11:08:42 -0800 (PST) From: "Anton D. Stavinskii" Date: Tue, 27 Jan 2026 23:08:19 +0400 Subject: [PATCH v2 1/2] ASoC: sophgo: cv1800b: document DAC overwrite handling Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20260127-incremental-for-i2s-dvier-v2-1-5f66b841f63d@gmail.com> References: <20260127-incremental-for-i2s-dvier-v2-0-5f66b841f63d@gmail.com> In-Reply-To: <20260127-incremental-for-i2s-dvier-v2-0-5f66b841f63d@gmail.com> To: Liam Girdwood , Mark Brown , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Jaroslav Kysela , Takashi Iwai , Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti , Chen Wang , Inochi Amaoto Cc: linux-sound@vger.kernel.org, sophgo@lists.linux.dev, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org, "Anton D. Stavinskii" X-Mailer: b4 0.14.3 X-Developer-Signature: v=1; a=ed25519-sha256; t=1769540916; l=1287; i=stavinsky@gmail.com; s=20260115; h=from:subject:message-id; bh=zadY22GSPVPhNTUtDV/+6Sluf6seV+Q8lASvyVpCmJ4=; b=rcy0EioZSDj08un85FD4cMTF4dOy7DTuSQ+7myJ0yfgsHFL4rCXoEjKKSGdM7eWN8MUM5J+1L rSTdu+GC0QwCHnuC5/qCHba9LWd4lsde4UUcAK/xj9+KiVKjYPcIw+f X-Developer-Key: i=stavinsky@gmail.com; a=ed25519; pk=2WxGZ1zd1vQwSPFCSks6zrADqUDBUdtq39lElk4ZE7Q= Add comments to cv1800b_dac_mute() and its caller to explain how the overwrite mechanism works and why we force it off before playback. Signed-off-by: Anton D. Stavinskii --- sound/soc/sophgo/cv1800b-sound-dac.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/sound/soc/sophgo/cv1800b-sound-dac.c b/sound/soc/sophgo/cv1800= b-sound-dac.c index ccf386174639..135322bcf6ad 100644 --- a/sound/soc/sophgo/cv1800b-sound-dac.c +++ b/sound/soc/sophgo/cv1800b-sound-dac.c @@ -57,6 +57,10 @@ static void cv1800b_dac_enable(struct cv1800b_priv *priv= , bool enable) writel(val, priv->regs + CV1800B_TXDAC_CTRL0); } =20 +/* + * Control the DAC overwrite bits. When enabled, the DAC outputs the fixed + * overwrite value instead of samples from the I2S input. + */ static void cv1800b_dac_mute(struct cv1800b_priv *priv, bool enable) { u32 val; @@ -105,7 +109,7 @@ static int cv1800b_dac_hw_params(struct snd_pcm_substre= am *substream, dev_err(priv->dev, "rate %u is not supported\n", rate); return -EINVAL; } - + /* Clear DAC overwrite so playback uses I2S data. */ cv1800b_dac_mute(priv, false); /* minimal decimation for 48kHz is 64*/ ret =3D cv1800b_dac_decimation(priv, DECIMATION_64); --=20 2.43.0 From nobody Sun Feb 8 07:58:40 2026 Received: from mail-wm1-f43.google.com (mail-wm1-f43.google.com [209.85.128.43]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id CF062366073 for ; Tue, 27 Jan 2026 19:08:50 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.43 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769540936; cv=none; b=FVv+uygvUbI220LAkBwEYkkamswRTvMhGkL/YQG48FfLLfVGzrKKxdzp5vZPuAeCq75oL9+T905dAVOclP0E28hPSE7kh4npUHRLEiR2Prfp9BlG5Y47xcmX2XdMgH/TfSmtgd+/fxnfM6hDC2tDmzNM/iM/z3/dR05iyPxFoeQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769540936; c=relaxed/simple; bh=H84erZxT2MlAaY5J3iUKm8PxILlu1jOlSTZ53NjhBCY=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=EEd3DAGn1n/MjDAMZPftLtmLsqlbE/oLCkYcVkNViFYR+ZxqGZmPAn5sDv/cemdXO4hc0aVI8r3ZwR+kfg4vonZi9rpSPV9LS99q4wTFm6byGzWDw2VR0ZQ8zDZ8pnluJkp752ED3mCGCM/2bT8zRICgfvCOT2uiypKJ9+w132U= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=AtC9lN+s; arc=none smtp.client-ip=209.85.128.43 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="AtC9lN+s" Received: by mail-wm1-f43.google.com with SMTP id 5b1f17b1804b1-4806bf39419so792855e9.1 for ; Tue, 27 Jan 2026 11:08:50 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1769540926; x=1770145726; darn=vger.kernel.org; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:from:to:cc:subject:date:message-id :reply-to; bh=j6l444t6jpG+w7dlEITp6QEjvTc4ukc4CjhdbSiVZ9s=; b=AtC9lN+sHsLqm03PvmDYsqVXoRYXbokVERW+B2u7LEZTy6X2WAylbngBnHdARIOtuF gaYwl0ayGp61uRZNiUAn299pmOXuF5yjFCCQzofxOjCyrfD9gN3K2U2xD6qaBz1BVt6N o503+sFHsfhSKCmj5yUZMbsJUKGIg82K7sguimoMx+ow6yPq7I2F+tQqdKGSLgIfilni zJTK2nol/amS/bZD8UdaOm1OR6IljlRVT9AEhp8IKBVTN+SE+Cw3sXEmS5BY51dcx3ct gBsMx+y1mts2foG1qUI0p/IEDtdpWlCHBwRA71fbBnmShGXT6MB3x2RIRouwvz7mobXl vVmg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1769540926; x=1770145726; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:x-gm-gg:x-gm-message-state:from:to :cc:subject:date:message-id:reply-to; bh=j6l444t6jpG+w7dlEITp6QEjvTc4ukc4CjhdbSiVZ9s=; b=xNPfEvKdFm7ueLsTb+hw5da7CRhXaZ0xf8WtGAKKUEKx0cJdSfHCx99aRI3K7rlyUl CjXHt0TSe+i/zANI0LJ043OGSaSyJ4FOrsZbH8fHNtpQUa1bg+L7f+jZ0XrOMNAfr2ql yd2UQiww7+agNKZBjdpZ3DzUkhQtZ5ugf5IAFWz8PtWDBVgeLAWRxCLnOiFTPZBNQxlg UPEeJlgObMCMO46kNYCwqWRNaeKPfnl5ccacqN47WThVYJ2+DSkWXWmFAxtXV+qeukYC e9KmrPCiuneracMw+nufAx5S2+Hey+RRUCb/XQwyJ9q/YPTAI+tRFblEk9vtBqdQY5Au SSfw== X-Forwarded-Encrypted: i=1; AJvYcCXeQp0yEhtqQRsL3fqqZyycASihG2rU+ef21htvy9DTd3t/pbRu0Y0xuSGqnOErhAKfFbUEzDUrE4/GjvE=@vger.kernel.org X-Gm-Message-State: AOJu0YxBjcSWa8n8CvT/n8F31N3bQtLbRKZZ47mjxUTW3GMMtDy9Nbe+ adWqyAY7ttiqlXLtDTX9yt8GAggNPmanzooezbM64E1zQCy0mkYBaVgU X-Gm-Gg: AZuq6aIuEx5AL3TJyC7cx1hRScCIyF5NrSmBao6YlbqMrBduyr1aL3BGGxqxPONv1E5 zI82ff6mjOgoOYaOFRrPYfnsUtdhzDSfwxN3K9+rxH0tWIuJg/z/xK8j8jf2foRLm4LIeqw+5oA MhsKiVaC6YP49p2RPfJdXdPP+8P7c7BO1vtCl486ID0rkY0bg/I7HjhBs3HSVHhH32YjU2DlON+ bP+R2i2l6sysSU+QKeuLMQsGJWNtc0Oq9PgVShPQbY1rfg2EvnIKNtBT6zEwKHBmzEzix6O4OtD YWJMuP0uZDxlcEGAiP4hh1XyQvEDX01zJxJdO6cl7KOlgWIle3QNnKAwwT0erA1U+7JG/HqJgUf s/6bM4ZPvpJ3bbSB3Gid2Bay5KRPDlQ/CRPnSbSzqZW+/MvQpkpAiOSwEju3RLDD+nLDSex59M+ L49fJANFTUSWY0PRUEvpiVtKAh/bO/GaZKZYTptQ3iIaxJ X-Received: by 2002:a05:600c:33a6:b0:47d:52ef:c572 with SMTP id 5b1f17b1804b1-48069e0fd24mr22092945e9.1.1769540926002; Tue, 27 Jan 2026 11:08:46 -0800 (PST) Received: from [127.0.1.1] (bba-94-59-215-181.alshamil.net.ae. [94.59.215.181]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-48066be77b5sm74577805e9.2.2026.01.27.11.08.43 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 27 Jan 2026 11:08:45 -0800 (PST) From: "Anton D. Stavinskii" Date: Tue, 27 Jan 2026 23:08:20 +0400 Subject: [PATCH v2 2/2] ASoC: sophgo: cv1800b: tidy Kconfig spacing Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20260127-incremental-for-i2s-dvier-v2-2-5f66b841f63d@gmail.com> References: <20260127-incremental-for-i2s-dvier-v2-0-5f66b841f63d@gmail.com> In-Reply-To: <20260127-incremental-for-i2s-dvier-v2-0-5f66b841f63d@gmail.com> To: Liam Girdwood , Mark Brown , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Jaroslav Kysela , Takashi Iwai , Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti , Chen Wang , Inochi Amaoto Cc: linux-sound@vger.kernel.org, sophgo@lists.linux.dev, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org, "Anton D. Stavinskii" X-Mailer: b4 0.14.3 X-Developer-Signature: v=1; a=ed25519-sha256; t=1769540916; l=698; i=stavinsky@gmail.com; s=20260115; h=from:subject:message-id; bh=H84erZxT2MlAaY5J3iUKm8PxILlu1jOlSTZ53NjhBCY=; b=/rD5GXHuEV3Sch9Z9gONegfTboapMyzZ1kxLPbu0BxspfEG4J5ZGlb3BJaQZ1f5WUa+G/K3eS KFadRcvrmSsDhGovRx87GE3yJ9CT++kOJFN6LW4GVcq35PrmpLbd6BN X-Developer-Key: i=stavinsky@gmail.com; a=ed25519; pk=2WxGZ1zd1vQwSPFCSks6zrADqUDBUdtq39lElk4ZE7Q= Restore the empty line that was accidentally removed earlier Signed-off-by: Anton D. Stavinskii --- sound/soc/sophgo/Kconfig | 1 + 1 file changed, 1 insertion(+) diff --git a/sound/soc/sophgo/Kconfig b/sound/soc/sophgo/Kconfig index e4786f087589..9b454261bcfd 100644 --- a/sound/soc/sophgo/Kconfig +++ b/sound/soc/sophgo/Kconfig @@ -28,6 +28,7 @@ config SND_SOC_CV1800B_ADC_CODEC help This driver provides an ASoC codec DAI for capture and basic control of the RXADC registers. + Say Y or M to build support for the Sophgo CV1800B internal analog ADC codec block (RXADC). The module will be called cv1800b-sound-adc --=20 2.43.0