ASoC: rt5670: export jack suspend/resume APIs

We force enable "Mic Det Power" when a jack is inserted. Also, we
set codec idle_bias_off = true. As a result, codec driver will not
suspend as we expect.

On Braswell, we don't need the jack detection when suspend but need
it after resume, so export the jack suspend/resume APIs which are
provided for machine driver to control during suspend/resume.

Signed-off-by: Jie Yang <yang.jie@intel.com>
Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
Signed-off-by: Bard Liao <bardliao@realtek.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/rt5670.c

@@ -461,6 +461,24 @@ static int rt5670_headset_detect(struct snd_soc_codec *codec, int jack_insert)
 	return rt5670->jack_type;
 }
 
+void rt5670_jack_suspend(struct snd_soc_codec *codec)
+{
+	struct rt5670_priv *rt5670 = snd_soc_codec_get_drvdata(codec);
+
+	rt5670->jack_type_saved = rt5670->jack_type;
+	rt5670_headset_detect(codec, 0);
+}
+EXPORT_SYMBOL_GPL(rt5670_jack_suspend);
+
+void rt5670_jack_resume(struct snd_soc_codec *codec)
+{
+	struct rt5670_priv *rt5670 = snd_soc_codec_get_drvdata(codec);
+
+	if (rt5670->jack_type_saved)
+		rt5670_headset_detect(codec, 1);
+}
+EXPORT_SYMBOL_GPL(rt5670_jack_resume);
+
 static int rt5670_button_detect(struct snd_soc_codec *codec)
 {
 	int btn_type, val;

sound/soc/codecs/rt5670.h

@@ -2004,8 +2004,11 @@ struct rt5670_priv {
 	int dsp_sw; /* expected parameter setting */
 	int dsp_rate;
 	int jack_type;
+	int jack_type_saved;
 };
 
+void rt5670_jack_suspend(struct snd_soc_codec *codec);
+void rt5670_jack_resume(struct snd_soc_codec *codec);
 int rt5670_set_jack_detect(struct snd_soc_codec *codec,
 	struct snd_soc_jack *jack);
 #endif /* __RT5670_H__ */