ASoC: wm8994: Bring WM8994 accessory detection up to date

Make the mechanism used for WM8994 more like that for WM1811 and WM8958:
provide the logic to distinguish between headphone and headset and hard
code the reporting of sensible SND_JACK values. Should integration with
other detection mechanisms be required we can add appropriate callbacks
(though some integrations should be able to use the subsystem ones).

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

diff --git a/sound/soc/codecs/wm8994.c b/sound/soc/codecs/wm8994.c
index 6a47c75..8aed0e3 100644 (file)
--- a/sound/soc/codecs/wm8994.c
+++ b/sound/soc/codecs/wm8994.c
@@ -2946,8 +2946,6 @@ static void wm8994_handle_pdata(struct wm8994_priv *wm8994)
  * @codec:   WM8994 codec
  * @jack:    jack to report detection events on
  * @micbias: microphone bias to detect on
- * @det:     value to report for presence detection
- * @shrt:    value to report for short detection
  *
  * Enable microphone detection via IRQ on the WM8994.  If GPIOs are
  * being used to bring out signals to the processor then only platform
@@ -2958,43 +2956,63 @@ static void wm8994_handle_pdata(struct wm8994_priv *wm8994)
  * and micbias2_lvl platform data members.
  */
 int wm8994_mic_detect(struct snd_soc_codec *codec, struct snd_soc_jack *jack,
-                     int micbias, int det, int shrt)
+                     int micbias)
 {
        struct wm8994_priv *wm8994 = snd_soc_codec_get_drvdata(codec);
        struct wm8994_micdet *micdet;
        struct wm8994 *control = wm8994->wm8994;
-       int reg;
+       int reg, ret;
 
-       if (control->type != WM8994)
+       if (control->type != WM8994) {
+               dev_warn(codec->dev, "Not a WM8994\n");
                return -EINVAL;
+       }
 
        switch (micbias) {
        case 1:
                micdet = &wm8994->micdet[0];
+               if (jack)
+                       ret = snd_soc_dapm_force_enable_pin(&codec->dapm,
+                                                           "MICBIAS1");
+               else
+                       ret = snd_soc_dapm_disable_pin(&codec->dapm,
+                                                      "MICBIAS1");
                break;
        case 2:
                micdet = &wm8994->micdet[1];
+               if (jack)
+                       ret = snd_soc_dapm_force_enable_pin(&codec->dapm,
+                                                           "MICBIAS1");
+               else
+                       ret = snd_soc_dapm_disable_pin(&codec->dapm,
+                                                      "MICBIAS1");
                break;
        default:
+               dev_warn(codec->dev, "Invalid MICBIAS %d\n", micbias);
                return -EINVAL;
-       }       
+       }
 
-       dev_dbg(codec->dev, "Configuring microphone detection on %d: %x %x\n",
-               micbias, det, shrt);
+       if (ret != 0)
+               dev_warn(codec->dev, "Failed to configure MICBIAS%d: %d\n",
+                        micbias, ret);
+
+       dev_dbg(codec->dev, "Configuring microphone detection on %d %p\n",
+               micbias, jack);
 
        /* Store the configuration */
        micdet->jack = jack;
-       micdet->det = det;
-       micdet->shrt = shrt;
+       micdet->detecting = true;
 
        /* If either of the jacks is set up then enable detection */
        if (wm8994->micdet[0].jack || wm8994->micdet[1].jack)
                reg = WM8994_MICD_ENA;
-       else 
+       else
                reg = 0;
 
        snd_soc_update_bits(codec, WM8994_MICBIAS, WM8994_MICD_ENA, reg);
 
+       snd_soc_dapm_sync(&codec->dapm);
+
        return 0;
 }
 EXPORT_SYMBOL_GPL(wm8994_mic_detect);
@@ -3020,20 +3038,42 @@ static irqreturn_t wm8994_mic_irq(int irq, void *data)
        dev_dbg(codec->dev, "Microphone status: %x\n", reg);
 
        report = 0;
-       if (reg & WM8994_MIC1_DET_STS)
-               report |= priv->micdet[0].det;
-       if (reg & WM8994_MIC1_SHRT_STS)
-               report |= priv->micdet[0].shrt;
+       if (reg & WM8994_MIC1_DET_STS) {
+               if (priv->micdet[0].detecting)
+                       report = SND_JACK_HEADSET;
+       }
+       if (reg & WM8994_MIC1_SHRT_STS) {
+               if (priv->micdet[0].detecting)
+                       report = SND_JACK_HEADPHONE;
+               else
+                       report |= SND_JACK_BTN_0;
+       }
+       if (report)
+               priv->micdet[0].detecting = false;
+       else
+               priv->micdet[0].detecting = true;
+
        snd_soc_jack_report(priv->micdet[0].jack, report,
-                           priv->micdet[0].det | priv->micdet[0].shrt);
+                           SND_JACK_HEADSET | SND_JACK_BTN_0);
 
        report = 0;
-       if (reg & WM8994_MIC2_DET_STS)
-               report |= priv->micdet[1].det;
-       if (reg & WM8994_MIC2_SHRT_STS)
-               report |= priv->micdet[1].shrt;
+       if (reg & WM8994_MIC2_DET_STS) {
+               if (priv->micdet[1].detecting)
+                       report = SND_JACK_HEADSET;
+       }
+       if (reg & WM8994_MIC2_SHRT_STS) {
+               if (priv->micdet[1].detecting)
+                       report = SND_JACK_HEADPHONE;
+               else
+                       report |= SND_JACK_BTN_0;
+       }
+       if (report)
+               priv->micdet[1].detecting = false;
+       else
+               priv->micdet[1].detecting = true;
+
        snd_soc_jack_report(priv->micdet[1].jack, report,
-                           priv->micdet[1].det | priv->micdet[1].shrt);
+                           SND_JACK_HEADSET | SND_JACK_BTN_0);
 
        return IRQ_HANDLED;
 }

diff --git a/sound/soc/codecs/wm8994.h b/sound/soc/codecs/wm8994.h
index c3a4247..f996d14 100644 (file)
--- a/sound/soc/codecs/wm8994.h
+++ b/sound/soc/codecs/wm8994.h
@@ -35,7 +35,7 @@
 typedef void (*wm8958_micdet_cb)(u16 status, void *data);
 
 int wm8994_mic_detect(struct snd_soc_codec *codec, struct snd_soc_jack *jack,
-                     int micbias, int det, int shrt);
+                     int micbias);
 int wm8958_mic_detect(struct snd_soc_codec *codec, struct snd_soc_jack *jack,
                      wm8958_micdet_cb cb, void *cb_data);
 
@@ -46,8 +46,7 @@ void wm8958_dsp2_init(struct snd_soc_codec *codec);
 
 struct wm8994_micdet {
        struct snd_soc_jack *jack;
-       int det;
-       int shrt;
+       bool detecting;
 };
 
 /* codec private data */