From: Keyon Jie <yang.jie@xxxxxxxxxxxxxxx>
Add check before seeting d0_substate and return success if Audio DSP is
already in the target substate.
Signed-off-by: Keyon Jie <yang.jie@xxxxxxxxxxxxxxx>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@xxxxxxxxxxxxxxx>
---
sound/soc/sof/pm.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/sound/soc/sof/pm.c b/sound/soc/sof/pm.c
index 3204c92f0e7d..b89810bf3230 100644
--- a/sound/soc/sof/pm.c
+++ b/sound/soc/sof/pm.c
@@ -416,6 +416,9 @@ int snd_sof_set_d0_substate(struct snd_sof_dev *sdev,
{
int ret;
+ if (sdev->d0_substate == d0_substate)
+ return 0;
+
/* do platform specific set_state */
ret = snd_sof_dsp_set_power_state(sdev, d0_substate);
if (ret < 0)
--
2.20.1
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