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X-OriginatorOrg: nuvoton.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 15 Apr 2024 07:06:56.3720 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 0ae6adfd-9664-404e-d327-08dc5d1aa2f3 X-MS-Exchange-CrossTenant-Id: a3f24931-d403-4b4a-94f1-7d83ac638e07 X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=a3f24931-d403-4b4a-94f1-7d83ac638e07;Ip=[175.98.123.7];Helo=[NTHCCAS02.nuvoton.com] X-MS-Exchange-CrossTenant-AuthSource: HK3PEPF0000021F.apcprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: JH0PR03MB7596 Content-Type: text/plain; charset="utf-8" Change the original fixed delay to the assignment from the property. It will make it more flexible to different platforms to avoid pop noise at the beginning of recording. Signed-off-by: Seven Lee Reviewed-by: Rob Herring (Arm) --- .../devicetree/bindings/sound/nuvoton,nau8821.yaml | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/Documentation/devicetree/bindings/sound/nuvoton,nau8821.yaml b= /Documentation/devicetree/bindings/sound/nuvoton,nau8821.yaml index 054b53954ac3..9f44168efb3e 100644 --- a/Documentation/devicetree/bindings/sound/nuvoton,nau8821.yaml +++ b/Documentation/devicetree/bindings/sound/nuvoton,nau8821.yaml @@ -103,6 +103,12 @@ properties: just limited to the left adc for design demand. type: boolean =20 + nuvoton,adc-delay-ms: + description: Delay (in ms) to make input path stable and avoid pop noi= se. + minimum: 125 + maximum: 500 + default: 125 + '#sound-dai-cells': const: 0 =20 @@ -136,6 +142,7 @@ examples: nuvoton,jack-eject-debounce =3D <0>; nuvoton,dmic-clk-threshold =3D <3072000>; nuvoton,dmic-slew-rate =3D <0>; + nuvoton,adc-delay-ms =3D <125>; #sound-dai-cells =3D <0>; }; }; --=20 2.25.1 From nobody Fri Feb 13 08:18:12 2026 Received: from APC01-SG2-obe.outbound.protection.outlook.com (mail-sgaapc01on2056.outbound.protection.outlook.com [40.107.215.56]) (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 69CF5208D4; 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X-OriginatorOrg: nuvoton.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 15 Apr 2024 07:06:57.5413 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: e0cb4708-8773-4c74-3e90-08dc5d1aa3a6 X-MS-Exchange-CrossTenant-Id: a3f24931-d403-4b4a-94f1-7d83ac638e07 X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=a3f24931-d403-4b4a-94f1-7d83ac638e07;Ip=[211.75.126.7];Helo=[NTHCCAS01.nuvoton.com] X-MS-Exchange-CrossTenant-AuthSource: HK3PEPF00000220.apcprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SI2PR03MB6485 Content-Type: text/plain; charset="utf-8" Change the original fixed delay to the assignment from the property. It will make it more flexible to different platforms to avoid pop noise at the beginning of recording. Signed-off-by: Seven Lee --- sound/soc/codecs/nau8821.c | 11 +++++++++-- sound/soc/codecs/nau8821.h | 1 + 2 files changed, 10 insertions(+), 2 deletions(-) diff --git a/sound/soc/codecs/nau8821.c b/sound/soc/codecs/nau8821.c index 012e347e6391..fec669e00a10 100644 --- a/sound/soc/codecs/nau8821.c +++ b/sound/soc/codecs/nau8821.c @@ -511,7 +511,7 @@ static int nau8821_left_adc_event(struct snd_soc_dapm_w= idget *w, =20 switch (event) { case SND_SOC_DAPM_POST_PMU: - msleep(125); + msleep(nau8821->adc_delay); regmap_update_bits(nau8821->regmap, NAU8821_R01_ENA_CTRL, NAU8821_EN_ADCL, NAU8821_EN_ADCL); break; @@ -535,7 +535,7 @@ static int nau8821_right_adc_event(struct snd_soc_dapm_= widget *w, =20 switch (event) { case SND_SOC_DAPM_POST_PMU: - msleep(125); + msleep(nau8821->adc_delay); regmap_update_bits(nau8821->regmap, NAU8821_R01_ENA_CTRL, NAU8821_EN_ADCR, NAU8821_EN_ADCR); break; @@ -1697,6 +1697,7 @@ static void nau8821_print_device_properties(struct na= u8821 *nau8821) dev_dbg(dev, "dmic-clk-threshold: %d\n", nau8821->dmic_clk_threshold); dev_dbg(dev, "key_enable: %d\n", nau8821->key_enable); + dev_dbg(dev, "adc-delay-ms: %d\n", nau8821->adc_delay); } =20 static int nau8821_read_device_properties(struct device *dev, @@ -1742,6 +1743,12 @@ static int nau8821_read_device_properties(struct dev= ice *dev, &nau8821->dmic_slew_rate); if (ret) nau8821->dmic_slew_rate =3D 0; + ret =3D device_property_read_u32(dev, "nuvoton,adc-delay-ms", + &nau8821->adc_delay); + if (ret) + nau8821->adc_delay =3D 125; + if (nau8821->adc_delay < 125 || nau8821->adc_delay > 500) + dev_warn(dev, "Please set the suitable delay time!\n"); =20 return 0; } diff --git a/sound/soc/codecs/nau8821.h b/sound/soc/codecs/nau8821.h index 62eaad130b2e..f0935ffafcbe 100644 --- a/sound/soc/codecs/nau8821.h +++ b/sound/soc/codecs/nau8821.h @@ -577,6 +577,7 @@ struct nau8821 { int dmic_clk_threshold; int dmic_slew_rate; int key_enable; + int adc_delay; }; =20 int nau8821_enable_jack_detect(struct snd_soc_component *component, --=20 2.25.1 From nobody Fri Feb 13 08:18:12 2026 Received: from HK2PR02CU002.outbound.protection.outlook.com (mail-eastasiaazon11010001.outbound.protection.outlook.com [52.101.128.1]) (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 02B8A23774; 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X-OriginatorOrg: nuvoton.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 15 Apr 2024 07:06:57.8251 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 8f8e97de-5b17-4e49-2ba5-08dc5d1aa3cf X-MS-Exchange-CrossTenant-Id: a3f24931-d403-4b4a-94f1-7d83ac638e07 X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=a3f24931-d403-4b4a-94f1-7d83ac638e07;Ip=[175.98.123.7];Helo=[NTHCCAS02.nuvoton.com] X-MS-Exchange-CrossTenant-AuthSource: HK3PEPF0000021F.apcprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: OSQPR03MB8528 Content-Type: text/plain; charset="utf-8" Remove redundant left/right adc channel enable controls. Signed-off-by: Seven Lee --- sound/soc/codecs/nau8821.c | 8 -------- 1 file changed, 8 deletions(-) diff --git a/sound/soc/codecs/nau8821.c b/sound/soc/codecs/nau8821.c index fec669e00a10..6818bbd1d3c7 100644 --- a/sound/soc/codecs/nau8821.c +++ b/sound/soc/codecs/nau8821.c @@ -512,12 +512,8 @@ static int nau8821_left_adc_event(struct snd_soc_dapm_= widget *w, switch (event) { case SND_SOC_DAPM_POST_PMU: msleep(nau8821->adc_delay); - regmap_update_bits(nau8821->regmap, NAU8821_R01_ENA_CTRL, - NAU8821_EN_ADCL, NAU8821_EN_ADCL); break; case SND_SOC_DAPM_POST_PMD: - regmap_update_bits(nau8821->regmap, - NAU8821_R01_ENA_CTRL, NAU8821_EN_ADCL, 0); break; default: return -EINVAL; @@ -536,12 +532,8 @@ static int nau8821_right_adc_event(struct snd_soc_dapm= _widget *w, switch (event) { case SND_SOC_DAPM_POST_PMU: msleep(nau8821->adc_delay); - regmap_update_bits(nau8821->regmap, NAU8821_R01_ENA_CTRL, - NAU8821_EN_ADCR, NAU8821_EN_ADCR); break; case SND_SOC_DAPM_POST_PMD: - regmap_update_bits(nau8821->regmap, - NAU8821_R01_ENA_CTRL, NAU8821_EN_ADCR, 0); break; default: return -EINVAL; --=20 2.25.1