[alsa-devel] [PATCH] ASoC: Disable WM8994/58 microphone detection over suspend

[Mark Brown]

It will be non-functional with the basises and clocks off anyway, if the
system needs microphone detection enabled over suspend then it should be
causing the CODEC to ignore suspend using the APIs for that to prevent
the biases being disabled.

Signed-off-by: Mark Brown <broonie at opensource.wolfsonmicro.com>
---
 sound/soc/codecs/wm8994.c |   25 +++++++++++++++++++++++++
 1 files changed, 25 insertions(+), 0 deletions(-)

diff --git a/sound/soc/codecs/wm8994.c b/sound/soc/codecs/wm8994.c
index b6d47e7..e6dfa10 100644
--- a/sound/soc/codecs/wm8994.c
+++ b/sound/soc/codecs/wm8994.c
@@ -2416,8 +2416,19 @@ static struct snd_soc_dai_driver wm8994_dai[] = {
 static int wm8994_suspend(struct snd_soc_codec *codec, pm_message_t state)
 {
 	struct wm8994_priv *wm8994 = snd_soc_codec_get_drvdata(codec);
+	struct wm8994 *control = codec->control_data;
 	int i, ret;
 
+	switch (control->type) {
+	case WM8994:
+		snd_soc_update_bits(codec, WM8994_MICBIAS, WM8994_MICD_ENA, 0);
+		break;
+	case WM8958:
+		snd_soc_update_bits(codec, WM8958_MIC_DETECT_1,
+				    WM8958_MICD_ENA, 0);
+		break;
+	}
+
 	for (i = 0; i < ARRAY_SIZE(wm8994->fll); i++) {
 		memcpy(&wm8994->fll_suspend[i], &wm8994->fll[i],
 		       sizeof(struct wm8994_fll_config));
@@ -2435,6 +2446,7 @@ static int wm8994_suspend(struct snd_soc_codec *codec, pm_message_t state)
 static int wm8994_resume(struct snd_soc_codec *codec)
 {
 	struct wm8994_priv *wm8994 = snd_soc_codec_get_drvdata(codec);
+	struct wm8994 *control = codec->control_data;
 	int i, ret;
 	unsigned int val, mask;
 
@@ -2473,6 +2485,19 @@ static int wm8994_resume(struct snd_soc_codec *codec)
 				 i + 1, ret);
 	}
 
+	switch (control->type) {
+	case WM8994:
+		if (wm8994->micdet[0].jack || wm8994->micdet[1].jack)
+			snd_soc_update_bits(codec, WM8994_MICBIAS,
+					    WM8994_MICD_ENA, WM8994_MICD_ENA);
+		break;
+	case WM8958:
+		if (wm8994->jack_cb)
+			snd_soc_update_bits(codec, WM8958_MIC_DETECT_1,
+					    WM8958_MICD_ENA, WM8958_MICD_ENA);
+		break;
+	}
+
 	return 0;
 }
 #else
-- 
1.7.5.1