ASoC: Fix suspend with active audio streams

When we get a stream suspend event force the power down since otherwise
the stream would remain marked as active.  In future we'll probably want
to make this stream-specific and add an interface to make the power down
of other widgets optional in order to support leaving bypass paths
active while suspending the processor.

Cc: stable@kernel.org
Reported-by: Joonyoung Shim <jy0922.shim@samsung.com>
Tested-by: Joonyoung Shim <jy0922.shim@samsung.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

diff --git a/sound/soc/soc-dapm.c b/sound/soc/soc-dapm.c
index d89f6dc..66d4c16 100644 (file)
--- a/sound/soc/soc-dapm.c
+++ b/sound/soc/soc-dapm.c
@@ -973,9 +973,19 @@ static int dapm_power_widgets(struct snd_soc_codec *codec, int event)
                        if (!w->power_check)
                                continue;
 
-                       power = w->power_check(w);
-                       if (power)
-                               sys_power = 1;
+                       /* If we're suspending then pull down all the 
+                        * power. */
+                       switch (event) {
+                       case SND_SOC_DAPM_STREAM_SUSPEND:
+                               power = 0;
+                               break;
+
+                       default:
+                               power = w->power_check(w);
+                               if (power)
+                                       sys_power = 1;
+                               break;
+                       }
 
                        if (w->power == power)
                                continue;
@@ -999,8 +1009,12 @@ static int dapm_power_widgets(struct snd_soc_codec *codec, int event)
                case SND_SOC_DAPM_STREAM_RESUME:
                        sys_power = 1;
                        break;
+               case SND_SOC_DAPM_STREAM_SUSPEND:
+                       sys_power = 0;
+                       break;
                case SND_SOC_DAPM_STREAM_NOP:
                        sys_power = codec->bias_level != SND_SOC_BIAS_STANDBY;
+                       break;
                default:
                        break;
                }