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    ASoC: Intel: Restore Baytrail ADSP streams only when ADSP was in reset · b80d19c1
    Jarkko Nikula 提交于
    There is no need to restore and restart PCM streams in case ADSP didn't
    reach reset and power off state during system suspend/resume cycle. In that
    case stream is still active but paused and firmware doesn't allow allocating
    a new stream before paused stream is freed.
    
    ADSP remains active in case suspend sequence didn't go to suspend_late
    stage. This can happen when either suspend sequence is aborted by a wakeup
    or by letting only devices suspend by "echo devices >/sys/power/pm_test".
    
    Currently stream restoring fails in these suspend cases. Fix this by adding
    a flag that indicates is complete stream reinitialization needed or is it
    enough to resume paused stream. Flag is set when we know that ADSP reached
    suspend_late.
    
    Initial fix to this issue came from Fang Yang. I modified it a little and
    forward ported it to top of two other suspend/resume patches from me.
    Signed-off-by: NJarkko Nikula <jarkko.nikula@linux.intel.com>
    Tested-by: NBorun Fu <borun.fu@intel.com>
    Cc: yang fang <yang.a.fang@intel.com>
    Signed-off-by: NMark Brown <broonie@linaro.org>
    b80d19c1
sst-baytrail-pcm.c 13.1 KB