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ASoC: SOF: PM: add check before setting d0_substate 

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@linux.intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20191111223343.19986-3-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Keyon Jie 2019-11-11 16:33:41 -06:00 committed by Mark Brown
parent 74b4dd04b1
commit 58a972efd2
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1 changed files with 3 additions and 0 deletions
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3
sound/soc/sof/pm.c
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@ -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)