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Commit 55a27786 authored by Mark Brown's avatar Mark Brown
Browse files

ASoC: wm8994: Actively discharge idle MICBIAS with jack detect 



This minimises the chance of any external capacitors that are fitted
being discharged into headphones as they insert.

Signed-off-by: default avatarMark Brown <broonie@opensource.wolfsonmicro.com>
parent 29fdc360

sound/soc/codecs/wm8994.c

+9 −0
Original line number Diff line number Diff line
@@ -3224,6 +3224,9 @@ static irqreturn_t wm1811_jackdet_irq(int irq, void *data) 
		snd_soc_jack_report(wm8994->micdet[0].jack,

				    SND_JACK_MECHANICAL, SND_JACK_MECHANICAL);



		snd_soc_update_bits(codec, WM8958_MICBIAS2,

				    WM8958_MICB2_DISCH, 0);



		/*

		 * Start off measument of microphone impedence to find

		 * out what's actually there.
@@ -3235,6 +3238,9 @@ static irqreturn_t wm1811_jackdet_irq(int irq, void *data) 
	} else {

		dev_dbg(codec->dev, "Jack not detected\n");



		snd_soc_update_bits(codec, WM8958_MICBIAS2,

				    WM8958_MICB2_DISCH, WM8958_MICB2_DISCH);



		snd_soc_jack_report(wm8994->micdet[0].jack, 0,

				    SND_JACK_MECHANICAL | SND_JACK_HEADSET |

				    wm8994->btn_mask);
@@ -3320,6 +3326,9 @@ int wm8958_mic_detect(struct snd_soc_codec *codec, struct snd_soc_jack *jack, 
		 * otherwise jump straight to microphone detection.

		 */

		if (wm8994->jackdet) {

			snd_soc_update_bits(codec, WM8958_MICBIAS2,

					    WM8958_MICB2_DISCH,

					    WM8958_MICB2_DISCH);

			snd_soc_update_bits(codec, WM8994_LDO_1,

					    WM8994_LDO1_DISCH, 0);

			wm1811_jackdet_set_mode(codec,