88 lines
3.0 KiB
Diff
88 lines
3.0 KiB
Diff
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From 58dc0051b1b3b2fcf1a919d7e97f072fd4e3962b Mon Sep 17 00:00:00 2001
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From: Arnaud Ferraris <arnaud.ferraris@collabora.com>
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Date: Fri, 3 Apr 2020 11:24:39 +0200
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Subject: [PATCH 256/464] ASoC: sun50i-codec-analog: Add support for internal
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bias
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In order to properly bias headset microphones, there should be a
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resistor between pins HBIAS and MICDET. This can be an external
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resistor, but the codec also provides an internal 2.2K resistor which
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can be enabled by a register.
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This patch enables or disables the internal bias resistor based on the
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appropriate device tree property.
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Signed-off-by: Arnaud Ferraris <arnaud.ferraris@collabora.com>
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[Samuel: split binding and implementation patches]
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Signed-off-by: Samuel Holland <samuel@sholland.org>
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---
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sound/soc/sunxi/sun50i-codec-analog.c | 27 +++++++++++++++++++++++++++
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1 file changed, 27 insertions(+)
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diff --git a/sound/soc/sunxi/sun50i-codec-analog.c b/sound/soc/sunxi/sun50i-codec-analog.c
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index e1e5e8de0130..c32aa35521e2 100644
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--- a/sound/soc/sunxi/sun50i-codec-analog.c
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+++ b/sound/soc/sunxi/sun50i-codec-analog.c
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@@ -120,6 +120,10 @@
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#define SUN50I_ADDA_JACK_MIC_CTRL_INNERRESEN 6
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#define SUN50I_ADDA_JACK_MIC_CTRL_HMICBIASEN 5
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+struct sun50i_codec_analog {
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+ bool internal_bias_resistor;
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+};
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+
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/* mixer controls */
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static const struct snd_kcontrol_new sun50i_a64_codec_mixer_controls[] = {
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SOC_DAPM_DOUBLE_R("Mic1 Playback Switch",
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@@ -472,6 +476,18 @@ static const struct snd_soc_dapm_route sun50i_a64_codec_routes[] = {
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{ "EARPIECE", NULL, "Earpiece Amp" },
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};
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+static int sun50i_a64_codec_probe(struct snd_soc_component *component)
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+{
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+ struct sun50i_codec_analog *codec = snd_soc_component_get_drvdata(component);
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+
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+ regmap_update_bits(component->regmap, SUN50I_ADDA_JACK_MIC_CTRL,
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+ BIT(SUN50I_ADDA_JACK_MIC_CTRL_INNERRESEN),
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+ codec->internal_bias_resistor <<
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+ SUN50I_ADDA_JACK_MIC_CTRL_INNERRESEN);
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+
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+ return 0;
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+}
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+
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static int sun50i_a64_codec_suspend(struct snd_soc_component *component)
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{
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return regmap_update_bits(component->regmap, SUN50I_ADDA_HP_CTRL,
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@@ -492,6 +508,7 @@ static const struct snd_soc_component_driver sun50i_codec_analog_cmpnt_drv = {
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.num_dapm_widgets = ARRAY_SIZE(sun50i_a64_codec_widgets),
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.dapm_routes = sun50i_a64_codec_routes,
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.num_dapm_routes = ARRAY_SIZE(sun50i_a64_codec_routes),
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+ .probe = sun50i_a64_codec_probe,
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.suspend = sun50i_a64_codec_suspend,
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.resume = sun50i_a64_codec_resume,
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};
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@@ -506,10 +523,20 @@ MODULE_DEVICE_TABLE(of, sun50i_codec_analog_of_match);
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static int sun50i_codec_analog_probe(struct platform_device *pdev)
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{
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+ struct sun50i_codec_analog *codec;
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struct regmap *regmap;
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void __iomem *base;
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bool enable;
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+ codec = devm_kzalloc(&pdev->dev, sizeof(*codec), GFP_KERNEL);
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+ if (!codec)
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+ return -ENOMEM;
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+
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+ codec->internal_bias_resistor = of_property_read_bool(pdev->dev.of_node,
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+ "allwinner,internal-bias-resistor");
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+
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+ platform_set_drvdata(pdev, codec);
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+
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base = devm_platform_ioremap_resource(pdev, 0);
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if (IS_ERR(base)) {
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dev_err(&pdev->dev, "Failed to map the registers\n");
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--
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2.34.1
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