From: Keyon Jie <yang.jie@xxxxxxxxxxxxxxx>
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@xxxxxxxxxxxxxxx>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@xxxxxxxxxxxxxxx>
---
sound/soc/sof/pm.c | 46 ++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 46 insertions(+)
diff --git a/sound/soc/sof/pm.c b/sound/soc/sof/pm.c
index 99e4e6ffff74..560a937e0484 100644
--- a/sound/soc/sof/pm.c
+++ b/sound/soc/sof/pm.c
@@ -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);
--
2.20.1
_______________________________________________
Alsa-devel mailing list
Alsa-devel@xxxxxxxxxxxxxxxx
https://mailman.alsa-project.org/mailman/listinfo/alsa-devel
