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Thu, 16 Jun 2022 02:25:59 -0400 (EDT) From: Samuel Holland To: Chen-Yu Tsai , Jernej Skrabec , Liam Girdwood , Mark Brown Subject: [PATCH 1/3] ASoC: dt-bindings: sun50i-codec: Add binding for internal bias Date: Thu, 16 Jun 2022 01:25:52 -0500 Message-Id: <20220616062554.57266-2-samuel@sholland.org> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220616062554.57266-1-samuel@sholland.org> References: <20220616062554.57266-1-samuel@sholland.org> MIME-Version: 1.0 Cc: devicetree@vger.kernel.org, Arnaud Ferraris , alsa-devel@alsa-project.org, Samuel Holland , linux-kernel@vger.kernel.org, Takashi Iwai , Maxime Ripard , Rob Herring , Krzysztof Kozlowski , linux-sunxi@lists.linux.dev, linux-arm-kernel@lists.infradead.org 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" From: Arnaud Ferraris In order to properly bias headset microphones, there should be a pull-up resistor between pins HBIAS and MIC2P. This can be an external resistor, but the codec also provides an internal 2.2K resistor which is enabled by a register. This patch adds a device-tree property to the sun50i-codec-analog driver to take advantage of this feature. Signed-off-by: Arnaud Ferraris [Samuel: split binding and implementation patches] Signed-off-by: Samuel Holland --- .../bindings/sound/allwinner,sun50i-a64-codec-analog.yaml | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/Documentation/devicetree/bindings/sound/allwinner,sun50i-a64-codec-analog.yaml b/Documentation/devicetree/bindings/sound/allwinner,sun50i-a64-codec-analog.yaml index 3b764415c9ab..66859eb8f79a 100644 --- a/Documentation/devicetree/bindings/sound/allwinner,sun50i-a64-codec-analog.yaml +++ b/Documentation/devicetree/bindings/sound/allwinner,sun50i-a64-codec-analog.yaml @@ -21,6 +21,11 @@ properties: description: Regulator for the headphone amplifier + allwinner,internal-bias-resistor: + description: + Enable the internal 2.2K bias resistor between HBIAS and MICDET pins + type: boolean + required: - compatible - reg From patchwork Thu Jun 16 06:25:53 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Samuel Holland X-Patchwork-Id: 12883379 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 alsa0.perex.cz (alsa0.perex.cz [77.48.224.243]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id A0090C433EF for ; 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Thu, 16 Jun 2022 02:26:02 -0400 (EDT) From: Samuel Holland To: Chen-Yu Tsai , Jernej Skrabec , Liam Girdwood , Mark Brown Subject: [PATCH 2/3] ASoC: sun50i-codec-analog: Add support for internal bias Date: Thu, 16 Jun 2022 01:25:53 -0500 Message-Id: <20220616062554.57266-3-samuel@sholland.org> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220616062554.57266-1-samuel@sholland.org> References: <20220616062554.57266-1-samuel@sholland.org> MIME-Version: 1.0 Cc: devicetree@vger.kernel.org, Arnaud Ferraris , alsa-devel@alsa-project.org, Samuel Holland , linux-kernel@vger.kernel.org, Takashi Iwai , Maxime Ripard , Rob Herring , Krzysztof Kozlowski , linux-sunxi@lists.linux.dev, linux-arm-kernel@lists.infradead.org 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" From: Arnaud Ferraris In order to properly bias headset microphones, there should be a pull-up resistor between pins HBIAS and MIC2P. This can be an external resistor, but the codec also provides an internal 2.2K resistor which is enabled by a register. This patch enables or disables the internal bias resistor based on a device tree property. Signed-off-by: Arnaud Ferraris [Samuel: split binding and implementation patches] Signed-off-by: Samuel Holland --- sound/soc/sunxi/sun50i-codec-analog.c | 29 +++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) diff --git a/sound/soc/sunxi/sun50i-codec-analog.c b/sound/soc/sunxi/sun50i-codec-analog.c index a41e25ad0aaf..699a5a318875 100644 --- a/sound/soc/sunxi/sun50i-codec-analog.c +++ b/sound/soc/sunxi/sun50i-codec-analog.c @@ -117,8 +117,13 @@ #define SUN50I_ADDA_HS_MBIAS_CTRL_MMICBIASEN 7 #define SUN50I_ADDA_JACK_MIC_CTRL 0x1d +#define SUN50I_ADDA_JACK_MIC_CTRL_INNERRESEN 6 #define SUN50I_ADDA_JACK_MIC_CTRL_HMICBIASEN 5 +struct sun50i_codec_analog { + bool internal_bias_resistor; +}; + /* mixer controls */ static const struct snd_kcontrol_new sun50i_a64_codec_mixer_controls[] = { SOC_DAPM_DOUBLE_R("Mic1 Playback Switch", @@ -471,6 +476,18 @@ static const struct snd_soc_dapm_route sun50i_a64_codec_routes[] = { { "EARPIECE", NULL, "Earpiece Amp" }, }; +static int sun50i_a64_codec_probe(struct snd_soc_component *component) +{ + struct sun50i_codec_analog *codec = snd_soc_component_get_drvdata(component); + + regmap_update_bits(component->regmap, SUN50I_ADDA_JACK_MIC_CTRL, + BIT(SUN50I_ADDA_JACK_MIC_CTRL_INNERRESEN), + codec->internal_bias_resistor << + SUN50I_ADDA_JACK_MIC_CTRL_INNERRESEN); + + return 0; +} + static int sun50i_a64_codec_suspend(struct snd_soc_component *component) { return regmap_update_bits(component->regmap, SUN50I_ADDA_HP_CTRL, @@ -491,6 +508,7 @@ static const struct snd_soc_component_driver sun50i_codec_analog_cmpnt_drv = { .num_dapm_widgets = ARRAY_SIZE(sun50i_a64_codec_widgets), .dapm_routes = sun50i_a64_codec_routes, .num_dapm_routes = ARRAY_SIZE(sun50i_a64_codec_routes), + .probe = sun50i_a64_codec_probe, .suspend = sun50i_a64_codec_suspend, .resume = sun50i_a64_codec_resume, }; @@ -505,9 +523,20 @@ MODULE_DEVICE_TABLE(of, sun50i_codec_analog_of_match); static int sun50i_codec_analog_probe(struct platform_device *pdev) { + struct sun50i_codec_analog *codec; struct regmap *regmap; void __iomem *base; + codec = devm_kzalloc(&pdev->dev, sizeof(*codec), GFP_KERNEL); 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Thu, 16 Jun 2022 02:26:05 -0400 (EDT) From: Samuel Holland To: Chen-Yu Tsai , Jernej Skrabec , Liam Girdwood , Mark Brown Subject: [PATCH 3/3] arm64: dts: allwinner: pinephone: Enable internal HMIC bias Date: Thu, 16 Jun 2022 01:25:54 -0500 Message-Id: <20220616062554.57266-4-samuel@sholland.org> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220616062554.57266-1-samuel@sholland.org> References: <20220616062554.57266-1-samuel@sholland.org> MIME-Version: 1.0 Cc: devicetree@vger.kernel.org, Arnaud Ferraris , alsa-devel@alsa-project.org, Samuel Holland , linux-kernel@vger.kernel.org, Takashi Iwai , Maxime Ripard , Rob Herring , Krzysztof Kozlowski , linux-sunxi@lists.linux.dev, linux-arm-kernel@lists.infradead.org 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" Revisions 1.0 and 1.1 of the PinePhone mainboard do not have an external resistor connecting HBIAS to MIC2P. Enable the internal resistor to provide the necessary headeset microphone bias. Signed-off-by: Samuel Holland --- arch/arm64/boot/dts/allwinner/sun50i-a64-pinephone-1.0.dts | 4 ++++ arch/arm64/boot/dts/allwinner/sun50i-a64-pinephone-1.1.dts | 4 ++++ 2 files changed, 8 insertions(+) diff --git a/arch/arm64/boot/dts/allwinner/sun50i-a64-pinephone-1.0.dts b/arch/arm64/boot/dts/allwinner/sun50i-a64-pinephone-1.0.dts index fb65319a3bd3..219f720b8b7d 100644 --- a/arch/arm64/boot/dts/allwinner/sun50i-a64-pinephone-1.0.dts +++ b/arch/arm64/boot/dts/allwinner/sun50i-a64-pinephone-1.0.dts @@ -10,6 +10,10 @@ / { compatible = "pine64,pinephone-1.0", "pine64,pinephone", "allwinner,sun50i-a64"; }; +&codec_analog { + allwinner,internal-bias-resistor; +}; + &sgm3140 { enable-gpios = <&pio 2 3 GPIO_ACTIVE_HIGH>; /* PC3 */ flash-gpios = <&pio 3 24 GPIO_ACTIVE_HIGH>; /* PD24 */ diff --git a/arch/arm64/boot/dts/allwinner/sun50i-a64-pinephone-1.1.dts b/arch/arm64/boot/dts/allwinner/sun50i-a64-pinephone-1.1.dts index 5e59d3752178..723af64a9cee 100644 --- a/arch/arm64/boot/dts/allwinner/sun50i-a64-pinephone-1.1.dts +++ b/arch/arm64/boot/dts/allwinner/sun50i-a64-pinephone-1.1.dts @@ -29,6 +29,10 @@ &backlight { default-brightness-level = <400>; }; +&codec_analog { + allwinner,internal-bias-resistor; +}; + &sgm3140 { enable-gpios = <&pio 3 24 GPIO_ACTIVE_HIGH>; /* PD24 */ flash-gpios = <&pio 2 3 GPIO_ACTIVE_HIGH>; /* PC3 */