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>

1 files changed, 16 insertions, 0 deletions

diff --git a/sound/soc/soc-dapm.c b/sound/soc/soc-dapm.c
index c68c204a48ad..8997fb34dddd 100644
--- 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)) {