ASoC: dapm: Ignore isolated signal generators for power purposes

A signal generator has no power control itself and so shouldn't cause a
power up of the device.

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

1 files changed, 5 insertions, 1 deletions

diff --git a/sound/soc/soc-dapm.c b/sound/soc/soc-dapm.c
index 4973545f2a32..ec58a3146569 100644
--- a/sound/soc/soc-dapm.c
+++ b/sound/soc/soc-dapm.c
@@ -1435,9 +1435,13 @@ static int dapm_power_widgets(struct snd_soc_dapm_context *dapm, int event)
                         /* Supplies and micbiases only bring the
                          * context up to STANDBY as unless something
                          * else is active and passing audio they
-                         * generally don't require full power.
+                         * generally don't require full power.  Signal
+                         * generators are virtual pins and have no
+                         * power impact themselves.
                          */
                         switch (w->id) {
+                        case snd_soc_dapm_siggen:
+                                break;
                         case snd_soc_dapm_supply:
                         case snd_soc_dapm_regulator_supply:
                         case snd_soc_dapm_micbias: