57 lines
2.2 KiB
Diff
57 lines
2.2 KiB
Diff
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From cdbf7ca5c0e1f2aa390458949713931116e0a060 Mon Sep 17 00:00:00 2001
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From: Ondrej Jirman
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Date: Wed, 12 May 2021 21:37:03 +0200
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Subject: ASoC: sunxi: sun8i-codec: Improve jack button handling and mic
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detection
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Setup ADC so that it samples with period of 16ms, disable smoothing
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and enable MDATA threshold (should be below idle voltage/HMIC_DATA
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value). Also enable HMIC_N, which makes sure we get HMIC_N samples
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after HMIC_DATA crosses the threshold.
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This allows us to perform steady state detection of HMIC_DATA, by
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comparing current and previous ADC samples, to detect end of the
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transient when the user de-presses the button. Otherwise ADC could
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sample anywhere within the transient, and the driver may mis-issue
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key-press events for other buttons attached to the resistor ladder.
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Signed-off-by: Ondrej Jirman <megous@megous.com>
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---
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sound/soc/sunxi/sun50i-codec-analog.c | 12 ++
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sound/soc/sunxi/sun8i-codec.c | 241 +++++++++++++++++++++++++---------
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2 files changed, 188 insertions(+), 65 deletions(-)
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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 b5de3cbd2062..fcef3aafd0ca 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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@@ -116,6 +116,11 @@
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#define SUN50I_ADDA_HS_MBIAS_CTRL 0x0e
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#define SUN50I_ADDA_HS_MBIAS_CTRL_MMICBIASEN 7
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+#define SUN50I_ADDA_MDET_CTRL 0x1c
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+#define SUN50I_ADDA_MDET_CTRL_SELDETADC_FS 4
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+#define SUN50I_ADDA_MDET_CTRL_SELDETADC_DB 2
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+#define SUN50I_ADDA_MDET_CTRL_SELDETADC_BF 0
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+
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#define SUN50I_ADDA_JACK_MIC_CTRL 0x1d
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#define SUN50I_ADDA_JACK_MIC_CTRL_JACKDETEN 7
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#define SUN50I_ADDA_JACK_MIC_CTRL_INNERRESEN 6
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@@ -501,6 +506,13 @@ static int sun50i_a64_codec_probe(struct snd_soc_component *component)
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codec->internal_bias_resistor <<
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SUN50I_ADDA_JACK_MIC_CTRL_INNERRESEN);
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+ /* Select sample interval of the ADC sample to 32ms */
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+ regmap_update_bits(component->regmap, SUN50I_ADDA_MDET_CTRL,
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+ 0x7 << SUN50I_ADDA_MDET_CTRL_SELDETADC_FS |
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+ 0x3 << SUN50I_ADDA_MDET_CTRL_SELDETADC_BF,
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+ 0x3 << SUN50I_ADDA_MDET_CTRL_SELDETADC_FS |
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+ 0x3 << SUN50I_ADDA_MDET_CTRL_SELDETADC_BF);
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+
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return 0;
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}
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--
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cgit v1.2.3
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