From: Ranjani Sridharan ranjani.sridharan@linux.intel.com
We have a workaround in place to address a known issue with host DMA running into xruns when capture streams are running. But when resuming from Sx, we unconditionally re-enable DMI L1 without taking the workaround into account and this could lead to xruns when a suspended capture stream is restarted.
To fix this rename the flag l1_support_enabled to l1_disabled in struct sof_intel_hda_dev to save the L1 disabled status which can be set/cleared when we get/put a stream and use the flag to determine if DMI L1 should enabled or not during the post_fw_run op.
Signed-off-by: Ranjani Sridharan ranjani.sridharan@linux.intel.com Reviewed-by: Pierre-Louis Bossart pierre-louis.bossart@linux.intel.com Reviewed-by: Bard Liao yung-chuan.liao@linux.intel.com Reviewed-by: Rander Wang rander.wang@intel.com Signed-off-by: Peter Ujfalusi peter.ujfalusi@linux.intel.com --- sound/soc/sof/intel/hda-ctrl.c | 8 +++++--- sound/soc/sof/intel/hda-dsp.c | 10 ++++------ sound/soc/sof/intel/hda-stream.c | 10 ++++++++-- sound/soc/sof/intel/hda.h | 2 +- 4 files changed, 18 insertions(+), 12 deletions(-)
diff --git a/sound/soc/sof/intel/hda-ctrl.c b/sound/soc/sof/intel/hda-ctrl.c index 3aea36c077c9..a1037512da1f 100644 --- a/sound/soc/sof/intel/hda-ctrl.c +++ b/sound/soc/sof/intel/hda-ctrl.c @@ -158,16 +158,18 @@ void hda_dsp_ctrl_misc_clock_gating(struct snd_sof_dev *sdev, bool enable) */ int hda_dsp_ctrl_clock_power_gating(struct snd_sof_dev *sdev, bool enable) { + struct sof_intel_hda_dev *hda = sdev->pdata->hw_pdata; u32 val;
/* enable/disable audio dsp clock gating */ val = enable ? PCI_CGCTL_ADSPDCGE : 0; snd_sof_pci_update_bits(sdev, PCI_CGCTL, PCI_CGCTL_ADSPDCGE, val);
- /* enable/disable DMI Link L1 support */ + /* disable the DMI link when requested. But enable only if it wasn't disabled previously */ val = enable ? HDA_VS_INTEL_EM2_L1SEN : 0; - snd_sof_dsp_update_bits(sdev, HDA_DSP_HDA_BAR, HDA_VS_INTEL_EM2, - HDA_VS_INTEL_EM2_L1SEN, val); + if (!enable || !hda->l1_disabled) + snd_sof_dsp_update_bits(sdev, HDA_DSP_HDA_BAR, HDA_VS_INTEL_EM2, + HDA_VS_INTEL_EM2_L1SEN, val);
/* enable/disable audio dsp power gating */ val = enable ? 0 : PCI_PGCTL_ADSPPGD; diff --git a/sound/soc/sof/intel/hda-dsp.c b/sound/soc/sof/intel/hda-dsp.c index 68eb06f13a1f..e3b69dbc1308 100644 --- a/sound/soc/sof/intel/hda-dsp.c +++ b/sound/soc/sof/intel/hda-dsp.c @@ -776,7 +776,7 @@ int hda_dsp_resume(struct snd_sof_dev *sdev) }
/* restore L1SEN bit */ - if (hda->l1_support_changed) + if (hda->l1_disabled) snd_sof_dsp_update_bits(sdev, HDA_DSP_HDA_BAR, HDA_VS_INTEL_EM2, HDA_VS_INTEL_EM2_L1SEN, 0); @@ -868,11 +868,9 @@ int hda_dsp_suspend(struct snd_sof_dev *sdev, u32 target_state) }
/* 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); + if (hda->l1_disabled) + snd_sof_dsp_update_bits(sdev, HDA_DSP_HDA_BAR, HDA_VS_INTEL_EM2, + HDA_VS_INTEL_EM2_L1SEN, HDA_VS_INTEL_EM2_L1SEN);
/* stop the CORB/RIRB DMA if it is On */ hda_codec_suspend_cmd_io(sdev); diff --git a/sound/soc/sof/intel/hda-stream.c b/sound/soc/sof/intel/hda-stream.c index 7f0fd05a96e6..d96d9cd9e62f 100644 --- a/sound/soc/sof/intel/hda-stream.c +++ b/sound/soc/sof/intel/hda-stream.c @@ -182,6 +182,7 @@ int hda_dsp_stream_spib_config(struct snd_sof_dev *sdev, struct hdac_ext_stream * hda_dsp_stream_get(struct snd_sof_dev *sdev, int direction, u32 flags) { + struct sof_intel_hda_dev *hda = sdev->pdata->hw_pdata; struct hdac_bus *bus = sof_to_bus(sdev); struct sof_intel_hda_stream *hda_stream; struct hdac_ext_stream *hext_stream = NULL; @@ -222,10 +223,12 @@ hda_dsp_stream_get(struct snd_sof_dev *sdev, int direction, u32 flags) * Workaround to address a known issue with host DMA that results * in xruns during pause/release in capture scenarios. */ - if (!(flags & SOF_HDA_STREAM_DMI_L1_COMPATIBLE)) + if (!(flags & SOF_HDA_STREAM_DMI_L1_COMPATIBLE)) { snd_sof_dsp_update_bits(sdev, HDA_DSP_HDA_BAR, HDA_VS_INTEL_EM2, HDA_VS_INTEL_EM2_L1SEN, 0); + hda->l1_disabled = true; + }
return hext_stream; } @@ -233,6 +236,7 @@ hda_dsp_stream_get(struct snd_sof_dev *sdev, int direction, u32 flags) /* free a stream */ int hda_dsp_stream_put(struct snd_sof_dev *sdev, int direction, int stream_tag) { + struct sof_intel_hda_dev *hda = sdev->pdata->hw_pdata; struct hdac_bus *bus = sof_to_bus(sdev); struct sof_intel_hda_stream *hda_stream; struct hdac_ext_stream *hext_stream; @@ -264,9 +268,11 @@ int hda_dsp_stream_put(struct snd_sof_dev *sdev, int direction, int stream_tag) spin_unlock_irq(&bus->reg_lock);
/* Enable DMI L1 if permitted */ - if (dmi_l1_enable) + if (dmi_l1_enable) { snd_sof_dsp_update_bits(sdev, HDA_DSP_HDA_BAR, HDA_VS_INTEL_EM2, HDA_VS_INTEL_EM2_L1SEN, HDA_VS_INTEL_EM2_L1SEN); + hda->l1_disabled = false; + }
if (!found) { dev_err(sdev->dev, "%s: stream_tag %d not opened!\n", diff --git a/sound/soc/sof/intel/hda.h b/sound/soc/sof/intel/hda.h index 45f9d4248f14..0679bebe4ad7 100644 --- a/sound/soc/sof/intel/hda.h +++ b/sound/soc/sof/intel/hda.h @@ -502,7 +502,7 @@ struct sof_intel_hda_dev { u32 stream_max;
/* PM related */ - bool l1_support_changed;/* during suspend, is L1SEN changed or not */ + bool l1_disabled;/* is DMI link L1 disabled? */
/* DMIC device */ struct platform_device *dmic_dev;