ASoC: Fix handling of bias levels for non-DAPM codecs

If the system doesn't have any DAPM widgets then we can't use their
state to check if the bias level for the codec should be up.

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

diff --git a/sound/soc/soc-dapm.c b/sound/soc/soc-dapm.c
index c68c204..8997fb3 100644 (file)
--- a/sound/soc/soc-dapm.c
+++ b/sound/soc/soc-dapm.c
@@ -966,6 +966,22 @@ static int dapm_power_widgets(struct snd_soc_codec *codec, int event)
                }
        }
 
+       /* If there are no DAPM widgets then try to figure out power from the
+        * event type.
+        */
+       if (list_empty(&codec->dapm_widgets)) {
+               switch (event) {
+               case SND_SOC_DAPM_STREAM_START:
+               case SND_SOC_DAPM_STREAM_RESUME:
+                       sys_power = 1;
+                       break;
+               case SND_SOC_DAPM_STREAM_NOP:
+                       sys_power = codec->bias_level != SND_SOC_BIAS_STANDBY;
+               default:
+                       break;
+               }
+       }
+
        /* If we're changing to all on or all off then prepare */
        if ((sys_power && codec->bias_level == SND_SOC_BIAS_STANDBY) ||
            (!sys_power && codec->bias_level == SND_SOC_BIAS_ON)) {