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Sat, 24 Oct 2020 14:41:29 +0800 From: Jiaxin Yu To: , , , , , , , , Subject: [PATCH 1/2] ASoC: mt6359: skip first time data at the beginning of DMIC recording Date: Sat, 24 Oct 2020 14:41:25 +0800 Message-ID: <1603521686-13036-2-git-send-email-jiaxin.yu@mediatek.com> X-Mailer: git-send-email 1.8.1.1.dirty In-Reply-To: <1603521686-13036-1-git-send-email-jiaxin.yu@mediatek.com> References: <1603521686-13036-1-git-send-email-jiaxin.yu@mediatek.com> MIME-Version: 1.0 X-MTK: N Cc: shane.chien@mediatek.com, Jiaxin Yu X-BeenThere: alsa-devel@alsa-project.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: "Alsa-devel" We can choose to drop away any length of data from the beginning according to project needs. Some projects don't want to throw away any data, because they want to use recorded data to do echo cancellation, so they have to make sure that they are aligned with the reference data as much as possible. Or there are other algorithms in the upper layer to eliminate this noise. Or some projects want to eliminate this noise form the kernel layer. However, the minimum recommended value is 50ms to skip pop noise. Signed-off-by: Jiaxin Yu --- sound/soc/codecs/mt6359.c | 38 ++++++++++++++++++++++++++++++++++---- sound/soc/codecs/mt6359.h | 1 + 2 files changed, 35 insertions(+), 4 deletions(-) -- 2.18.0 diff --git a/sound/soc/codecs/mt6359.c b/sound/soc/codecs/mt6359.c index 81aafb553bdd9..9a68656a9f731 100644 --- a/sound/soc/codecs/mt6359.c +++ b/sound/soc/codecs/mt6359.c @@ -1276,6 +1276,29 @@ static int mt_mtkaif_tx_event(struct snd_soc_dapm_widget *w, return 0; } +static int mt_ul_src_event(struct snd_soc_dapm_widget *w, + struct snd_kcontrol *kcontrol, + int event) +{ + struct snd_soc_component *cmpnt = snd_soc_dapm_to_component(w->dapm); + struct mt6359_priv *priv = snd_soc_component_get_drvdata(cmpnt); + unsigned int time = priv->ul_delay_ms; + + dev_dbg(priv->dev, "%s(), event = 0x%x\n", __func__, event); + + switch (event) { + case SND_SOC_DAPM_POST_PMU: + /* skip first time data to avoid recording pop noise */ + if (time) + usleep_range(1000 * time, 1000 * (time + 1)); + break; + default: + break; + } + + return 0; +} + static int mt_ul_src_dmic_event(struct snd_soc_dapm_widget *w, struct snd_kcontrol *kcontrol, int event) @@ -2050,9 +2073,8 @@ static const struct snd_soc_dapm_widget mt6359_dapm_widgets[] = { SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD), SND_SOC_DAPM_SUPPLY_S("UL_SRC", SUPPLY_SEQ_UL_SRC, - MT6359_AFE_UL_SRC_CON0_L, - UL_SRC_ON_TMP_CTL_SFT, 0, - NULL, 0), + MT6359_AFE_UL_SRC_CON0_L, UL_SRC_ON_TMP_CTL_SFT, + 0, mt_ul_src_event, SND_SOC_DAPM_POST_PMU), SND_SOC_DAPM_SUPPLY_S("UL_SRC_DMIC", SUPPLY_SEQ_UL_SRC_DMIC, SND_SOC_NOPM, 0, 0, @@ -2062,7 +2084,7 @@ static const struct snd_soc_dapm_widget mt6359_dapm_widgets[] = { SND_SOC_DAPM_SUPPLY_S("UL_SRC_34", SUPPLY_SEQ_UL_SRC, MT6359_AFE_ADDA6_UL_SRC_CON0_L, ADDA6_UL_SRC_ON_TMP_CTL_SFT, 0, - NULL, 0), + mt_ul_src_event, SND_SOC_DAPM_POST_PMU), SND_SOC_DAPM_SUPPLY_S("UL_SRC_34_DMIC", SUPPLY_SEQ_UL_SRC_DMIC, SND_SOC_NOPM, 0, 0, @@ -2674,6 +2696,14 @@ static int mt6359_parse_dt(struct mt6359_priv *priv) priv->mux_select[MUX_MIC_TYPE_2] = MIC_TYPE_MUX_IDLE; } + ret = of_property_read_u32(np, "mediatek,ul-delay-ms", + &priv->ul_delay_ms); + if (ret) { + dev_warn(priv->dev, "%s() failed to read ul-delay-ms\n", + __func__); + priv->ul_delay_ms = 0; + } + return 0; } diff --git a/sound/soc/codecs/mt6359.h b/sound/soc/codecs/mt6359.h index 3792e534a91b6..de66e49b17011 100644 --- a/sound/soc/codecs/mt6359.h +++ b/sound/soc/codecs/mt6359.h @@ -2625,6 +2625,7 @@ struct mt6359_priv { int ana_gain[AUDIO_ANALOG_VOLUME_TYPE_MAX]; unsigned int mux_select[MUX_NUM]; unsigned int dmic_one_wire_mode; + unsigned int ul_delay_ms; int dev_counter[DEVICE_NUM]; int hp_gain_ctl; int hp_hifi_mode; From patchwork Sat Oct 24 06:41:26 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?b?SmlheGluIFl1ICjkv57lrrbpkasp?= X-Patchwork-Id: 291326 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-11.0 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, MIME_BASE64_TEXT, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, UNPARSEABLE_RELAY, URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A7781C2D0A3 for ; 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Sat, 24 Oct 2020 14:41:29 +0800 Received: from localhost.localdomain (10.17.3.153) by MTKCAS06.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Sat, 24 Oct 2020 14:41:29 +0800 From: Jiaxin Yu To: , , , , , , , , Subject: [PATCH 2/2] dt-bindings: mediatek: mt8192: add ul-delay-ms property Date: Sat, 24 Oct 2020 14:41:26 +0800 Message-ID: <1603521686-13036-3-git-send-email-jiaxin.yu@mediatek.com> X-Mailer: git-send-email 1.8.1.1.dirty In-Reply-To: <1603521686-13036-1-git-send-email-jiaxin.yu@mediatek.com> References: <1603521686-13036-1-git-send-email-jiaxin.yu@mediatek.com> MIME-Version: 1.0 X-MTK: N Cc: shane.chien@mediatek.com, Jiaxin Yu X-BeenThere: alsa-devel@alsa-project.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: "Alsa-devel" We can choose to drop any length of data from the beginning according accroding 'ul-delay-ms'. Signed-off-by: Jiaxin Yu --- Documentation/devicetree/bindings/sound/mt6359.yaml | 6 ++++++ 1 file changed, 6 insertions(+) -- 2.18.0 diff --git a/Documentation/devicetree/bindings/sound/mt6359.yaml b/Documentation/devicetree/bindings/sound/mt6359.yaml index a54f466f769d4..fd2d02c97fe7c 100644 --- a/Documentation/devicetree/bindings/sound/mt6359.yaml +++ b/Documentation/devicetree/bindings/sound/mt6359.yaml @@ -49,6 +49,11 @@ properties: description: | Specifies the type of mic type connected to adc2 + mediatek,ul-delay-ms: + $ref: /schemas/types.yaml#/definitions/uint32 + description: | + Skip first time data at the beginning of DMIC recording + additionalProperties: false examples: @@ -56,6 +61,7 @@ examples: mt6359codec: mt6359codec { mediatek,dmic-mode = <0>; mediatek,mic-type-0 = <2>; + mediatek,ul-delay-ms = <50>; }; ...