diff options
Diffstat (limited to 'sound/soc/sof/pm.c')
| -rw-r--r-- | sound/soc/sof/pm.c | 39 |
1 files changed, 37 insertions, 2 deletions
diff --git a/sound/soc/sof/pm.c b/sound/soc/sof/pm.c index 560a937e0484..0fd5567237a8 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) @@ -428,12 +431,44 @@ int snd_sof_set_d0_substate(struct snd_sof_dev *sdev, } EXPORT_SYMBOL(snd_sof_set_d0_substate); +/* + * Audio DSP states may transform as below:- + * + * D0I3 compatible stream + * Runtime +---------------------+ opened only, timeout + * suspend | +--------------------+ + * +------------+ D0(active) | | + * | | <---------------+ | + * | +--------> | | | + * | |Runtime +--^--+---------^--+--+ The last | | + * | |resume | | | | opened D0I3 | | + * | | | | | | compatible | | + * | | resume| | | | stream closed | | + * | | from | | D3 | | | | + * | | D3 | |suspend | | d0i3 | | + * | | | | | |suspend | | + * | | | | | | | | + * | | | | | | | | + * +-v---+-----------+--v-------+ | | +------+----v----+ + * | | | +-----------> | + * | D3 (suspended) | | | D0I3 +-----+ + * | | +--------------+ | | + * | | resume from | | | + * +-------------------^--------+ d0i3 suspend +----------------+ | + * | | + * | D3 suspend | + * +------------------------------------------------+ + * + * d0i3_suspend = s0_suspend && D0I3 stream opened, + * D3 suspend = !d0i3_suspend, + */ + int snd_sof_resume(struct device *dev) { struct snd_sof_dev *sdev = dev_get_drvdata(dev); int ret; - if (sdev->s0_suspend) { + if (snd_sof_dsp_d0i3_on_suspend(sdev)) { /* resume from D0I3 */ dev_dbg(sdev->dev, "DSP will exit from D0i3...\n"); ret = snd_sof_set_d0_substate(sdev, SOF_DSP_D0I0); @@ -462,7 +497,7 @@ int snd_sof_suspend(struct device *dev) struct snd_sof_dev *sdev = dev_get_drvdata(dev); int ret; - if (sdev->s0_suspend) { + if (snd_sof_dsp_d0i3_on_suspend(sdev)) { /* suspend to D0i3 */ dev_dbg(sdev->dev, "DSP is trying to enter D0i3...\n"); ret = snd_sof_set_d0_substate(sdev, SOF_DSP_D0I3); |