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ASoC: SOF: Intel: hda: set L1SEN on S0ix suspend 

Set L1SEN to make sure the system can enter S0ix, and restore it on
resume.

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/20191101170916.26517-3-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Keyon Jie 2019-11-01 12:09:15 -05:00 committed by Mark Brown
parent 8cd73ce7ba
commit 16299326a0
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
2 changed files with 18 additions and 0 deletions
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15
sound/soc/sof/intel/hda-dsp.c
View File

@ -478,9 +478,16 @@ static int hda_resume(struct snd_sof_dev *sdev, bool runtime_resume)
int hda_dsp_resume(struct snd_sof_dev *sdev)
{
struct sof_intel_hda_dev *hda = sdev->pdata->hw_pdata;
struct pci_dev *pci = to_pci_dev(sdev->dev);
if (sdev->s0_suspend) {
/* restore L1SEN bit */
if (hda->l1_support_changed)
snd_sof_dsp_update_bits(sdev, HDA_DSP_HDA_BAR,
HDA_VS_INTEL_EM2,
HDA_VS_INTEL_EM2_L1SEN, 0);
/* restore and disable the system wakeup */
pci_restore_state(pci);
disable_irq_wake(pci->irq);
@ -518,11 +525,19 @@ int hda_dsp_runtime_suspend(struct snd_sof_dev *sdev)
int hda_dsp_suspend(struct snd_sof_dev *sdev)
{
struct sof_intel_hda_dev *hda = sdev->pdata->hw_pdata;
struct hdac_bus *bus = sof_to_bus(sdev);
struct pci_dev *pci = to_pci_dev(sdev->dev);
int ret;
if (sdev->s0_suspend) {
/* enable L1SEN to make sure the system can enter S0Ix */
hda->l1_support_changed =
snd_sof_dsp_update_bits(sdev, HDA_DSP_HDA_BAR,
HDA_VS_INTEL_EM2,
HDA_VS_INTEL_EM2_L1SEN,
HDA_VS_INTEL_EM2_L1SEN);
/* enable the system waking up via IPC IRQ */
enable_irq_wake(pci->irq);
pci_save_state(pci);

3
sound/soc/sof/intel/hda.h
View File

@ -408,6 +408,9 @@ struct sof_intel_hda_dev {
int irq;
/* PM related */
bool l1_support_changed;/* during suspend, is L1SEN changed or not */
/* DMIC device */
struct platform_device *dmic_dev;
};