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From: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
To: alsa-devel@alsa-project.org
Cc: tiwai@suse.de, broonie@kernel.org,
	Keyon Jie <yang.jie@linux.intel.com>,
	Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Subject: [alsa-devel] [PATCH 2/3] ASoC: SOF: Intel: hda: set L1SEN on S0ix suspend
Date: Fri,  1 Nov 2019 12:09:15 -0500	[thread overview]
Message-ID: <20191101170916.26517-3-pierre-louis.bossart@linux.intel.com> (raw)
In-Reply-To: <20191101170916.26517-1-pierre-louis.bossart@linux.intel.com>

From: Keyon Jie <yang.jie@linux.intel.com>

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>
---
 sound/soc/sof/intel/hda-dsp.c | 15 +++++++++++++++
 sound/soc/sof/intel/hda.h     |  3 +++
 2 files changed, 18 insertions(+)

diff --git a/sound/soc/sof/intel/hda-dsp.c b/sound/soc/sof/intel/hda-dsp.c
index d23573d9e9c4..3a54edd017fe 100644
--- a/sound/soc/sof/intel/hda-dsp.c
+++ b/sound/soc/sof/intel/hda-dsp.c
@@ -477,9 +477,16 @@ 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);
@@ -517,11 +524,19 @@ 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);
diff --git a/sound/soc/sof/intel/hda.h b/sound/soc/sof/intel/hda.h
index 5ad73a34b09c..18d7e72bf9b7 100644
--- a/sound/soc/sof/intel/hda.h
+++ b/sound/soc/sof/intel/hda.h
@@ -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;
 };
-- 
2.20.1

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  parent reply	other threads:[~2019-11-01 17:13 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-11-01 17:09 [alsa-devel] [PATCH 0/3] ASoC: SOF: Intel: improvements for S0ix support Pierre-Louis Bossart
2019-11-01 17:09 ` [alsa-devel] [PATCH 1/3] ASoC: SOF: topology: fix missing NULL pointer check Pierre-Louis Bossart
2019-11-08 12:20   ` [alsa-devel] Applied "ASoC: SOF: topology: fix missing NULL pointer check" to the asoc tree Mark Brown
2019-11-01 17:09 ` Pierre-Louis Bossart [this message]
2019-11-08 12:20   ` [alsa-devel] Applied "ASoC: SOF: Intel: hda: set L1SEN on S0ix suspend" " Mark Brown
2019-11-01 17:09 ` [alsa-devel] [PATCH 3/3] ASoC: SOF: Intel: hda: Simplify the hda_dsp_wait_d0i3c_done() function Pierre-Louis Bossart
2019-11-04 13:27   ` [alsa-devel] Applied "ASoC: SOF: Intel: hda: Simplify the hda_dsp_wait_d0i3c_done() function" to the asoc tree Mark Brown

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