ASoC: mfld_machine: Update locking around use of DAPM pin API

The pin updates in this driver look like they are intended to be done
atomically, update to do so.

Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@linaro.org>

diff --git a/sound/soc/intel/mfld_machine.c b/sound/soc/intel/mfld_machine.c
index d3d4c32..0cef32e 100644 (file)
--- a/sound/soc/intel/mfld_machine.c
+++ b/sound/soc/intel/mfld_machine.c
@@ -101,20 +101,27 @@ static int headset_set_switch(struct snd_kcontrol *kcontrol,
        struct snd_ctl_elem_value *ucontrol)
 {
        struct snd_soc_codec *codec =  snd_kcontrol_chip(kcontrol);
+       struct snd_soc_dapm_context *dapm = &codec->dapm;
 
        if (ucontrol->value.integer.value[0] == hs_switch)
                return 0;
 
+       snd_soc_dapm_mutex_lock(dapm);
+
        if (ucontrol->value.integer.value[0]) {
                pr_debug("hs_set HS path\n");
-               snd_soc_dapm_enable_pin(&codec->dapm, "Headphones");
-               snd_soc_dapm_disable_pin(&codec->dapm, "EPOUT");
+               snd_soc_dapm_enable_pin_unlocked(dapm, "Headphones");
+               snd_soc_dapm_disable_pin_unlocked(dapm, "EPOUT");
        } else {
                pr_debug("hs_set EP path\n");
-               snd_soc_dapm_disable_pin(&codec->dapm, "Headphones");
-               snd_soc_dapm_enable_pin(&codec->dapm, "EPOUT");
+               snd_soc_dapm_disable_pin_unlocked(dapm, "Headphones");
+               snd_soc_dapm_enable_pin_unlocked(dapm, "EPOUT");
        }
-       snd_soc_dapm_sync(&codec->dapm);
+
+       snd_soc_dapm_sync_unlocked(dapm);
+
+       snd_soc_dapm_mutex_unlock(dapm);
+
        hs_switch = ucontrol->value.integer.value[0];
 
        return 0;
@@ -122,18 +129,20 @@ static int headset_set_switch(struct snd_kcontrol *kcontrol,
 
 static void lo_enable_out_pins(struct snd_soc_codec *codec)
 {
-       snd_soc_dapm_enable_pin(&codec->dapm, "IHFOUTL");
-       snd_soc_dapm_enable_pin(&codec->dapm, "IHFOUTR");
-       snd_soc_dapm_enable_pin(&codec->dapm, "LINEOUTL");
-       snd_soc_dapm_enable_pin(&codec->dapm, "LINEOUTR");
-       snd_soc_dapm_enable_pin(&codec->dapm, "VIB1OUT");
-       snd_soc_dapm_enable_pin(&codec->dapm, "VIB2OUT");
+       struct snd_soc_dapm_context *dapm = &codec->dapm;
+
+       snd_soc_dapm_enable_pin_unlocked(dapm, "IHFOUTL");
+       snd_soc_dapm_enable_pin_unlocked(dapm, "IHFOUTR");
+       snd_soc_dapm_enable_pin_unlocked(dapm, "LINEOUTL");
+       snd_soc_dapm_enable_pin_unlocked(dapm, "LINEOUTR");
+       snd_soc_dapm_enable_pin_unlocked(dapm, "VIB1OUT");
+       snd_soc_dapm_enable_pin_unlocked(dapm, "VIB2OUT");
        if (hs_switch) {
-               snd_soc_dapm_enable_pin(&codec->dapm, "Headphones");
-               snd_soc_dapm_disable_pin(&codec->dapm, "EPOUT");
+               snd_soc_dapm_enable_pin_unlocked(dapm, "Headphones");
+               snd_soc_dapm_disable_pin_unlocked(dapm, "EPOUT");
        } else {
-               snd_soc_dapm_disable_pin(&codec->dapm, "Headphones");
-               snd_soc_dapm_enable_pin(&codec->dapm, "EPOUT");
+               snd_soc_dapm_disable_pin_unlocked(dapm, "Headphones");
+               snd_soc_dapm_enable_pin_unlocked(dapm, "EPOUT");
        }
 }
 
@@ -148,44 +157,52 @@ static int lo_set_switch(struct snd_kcontrol *kcontrol,
        struct snd_ctl_elem_value *ucontrol)
 {
        struct snd_soc_codec *codec =  snd_kcontrol_chip(kcontrol);
+       struct snd_soc_dapm_context *dapm = &codec->dapm;
 
        if (ucontrol->value.integer.value[0] == lo_dac)
                return 0;
 
+       snd_soc_dapm_mutex_lock(dapm);
+
        /* we dont want to work with last state of lineout so just enable all
         * pins and then disable pins not required
         */
        lo_enable_out_pins(codec);
+
        switch (ucontrol->value.integer.value[0]) {
        case 0:
                pr_debug("set vibra path\n");
-               snd_soc_dapm_disable_pin(&codec->dapm, "VIB1OUT");
-               snd_soc_dapm_disable_pin(&codec->dapm, "VIB2OUT");
+               snd_soc_dapm_disable_pin_unlocked(dapm, "VIB1OUT");
+               snd_soc_dapm_disable_pin_unlocked(dapm, "VIB2OUT");
                snd_soc_update_bits(codec, SN95031_LOCTL, 0x66, 0);
                break;
 
        case 1:
                pr_debug("set hs  path\n");
-               snd_soc_dapm_disable_pin(&codec->dapm, "Headphones");
-               snd_soc_dapm_disable_pin(&codec->dapm, "EPOUT");
+               snd_soc_dapm_disable_pin_unlocked(dapm, "Headphones");
+               snd_soc_dapm_disable_pin_unlocked(dapm, "EPOUT");
                snd_soc_update_bits(codec, SN95031_LOCTL, 0x66, 0x22);
                break;
 
        case 2:
                pr_debug("set spkr path\n");
-               snd_soc_dapm_disable_pin(&codec->dapm, "IHFOUTL");
-               snd_soc_dapm_disable_pin(&codec->dapm, "IHFOUTR");
+               snd_soc_dapm_disable_pin_unlocked(dapm, "IHFOUTL");
+               snd_soc_dapm_disable_pin_unlocked(dapm, "IHFOUTR");
                snd_soc_update_bits(codec, SN95031_LOCTL, 0x66, 0x44);
                break;
 
        case 3:
                pr_debug("set null path\n");
-               snd_soc_dapm_disable_pin(&codec->dapm, "LINEOUTL");
-               snd_soc_dapm_disable_pin(&codec->dapm, "LINEOUTR");
+               snd_soc_dapm_disable_pin_unlocked(dapm, "LINEOUTL");
+               snd_soc_dapm_disable_pin_unlocked(dapm, "LINEOUTR");
                snd_soc_update_bits(codec, SN95031_LOCTL, 0x66, 0x66);
                break;
        }
-       snd_soc_dapm_sync(&codec->dapm);
+
+       snd_soc_dapm_sync_unlocked(dapm);
+
+       snd_soc_dapm_mutex_unlock(dapm);
+
        lo_dac = ucontrol->value.integer.value[0];
        return 0;
 }