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);
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);