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ASoC: SOF: PM: Add support for DSP D0i3 state when entering S0ix

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When system is entering into S0ix, the PCI device may transition to the
D0i3 substate instead of D3. In D0i3, some always-on functionality can
be enabled, such as acoustic event detection, voice activity detection
or hotwording. When an event is detected, the DSP firmware can wake-up
the device for a transition to D0 with an interrupt.

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/20191025224122.7718-26-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Keyon Jie 2019-10-25 17:41:21 -05:00 committed by Mark Brown
parent 5655ce660a
commit c470fc3f61
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GPG Key ID: 24D68B725D5487D0
1 changed files with 46 additions and 0 deletions
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46
sound/soc/sof/pm.c
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@ -430,12 +430,58 @@ EXPORT_SYMBOL(snd_sof_set_d0_substate);
int snd_sof_resume(struct device *dev)
{
struct snd_sof_dev *sdev = dev_get_drvdata(dev);
int ret;
if (sdev->s0_suspend) {
/* resume from D0I3 */
dev_dbg(sdev->dev, "DSP will exit from D0i3...\n");
ret = snd_sof_set_d0_substate(sdev, SOF_DSP_D0I0);
if (ret == -ENOTSUPP) {
/* fallback to resume from D3 */
dev_dbg(sdev->dev, "D0i3 not supported, fall back to resume from D3...\n");
goto d3_resume;
} else if (ret < 0) {
dev_err(sdev->dev, "error: failed to exit from D0I3 %d\n",
ret);
return ret;
}
/* platform-specific resume from D0i3 */
return snd_sof_dsp_resume(sdev);
}
d3_resume:
/* resume from D3 */
return sof_resume(dev, false);
}
EXPORT_SYMBOL(snd_sof_resume);
int snd_sof_suspend(struct device *dev)
{
struct snd_sof_dev *sdev = dev_get_drvdata(dev);
int ret;
if (sdev->s0_suspend) {
/* suspend to D0i3 */
dev_dbg(sdev->dev, "DSP is trying to enter D0i3...\n");
ret = snd_sof_set_d0_substate(sdev, SOF_DSP_D0I3);
if (ret == -ENOTSUPP) {
/* fallback to D3 suspend */
dev_dbg(sdev->dev, "D0i3 not supported, fall back to D3...\n");
goto d3_suspend;
} else if (ret < 0) {
dev_err(sdev->dev, "error: failed to enter D0I3, %d\n",
ret);
return ret;
}
/* platform-specific suspend to D0i3 */
return snd_sof_dsp_suspend(sdev);
}
d3_suspend:
/* suspend to D3 */
return sof_suspend(dev, false);
}
EXPORT_SYMBOL(snd_sof_suspend);