diff options
| author | Ranjani Sridharan <ranjani.sridharan@linux.intel.com> | 2020-01-30 01:07:25 +0300 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2020-02-11 14:48:07 +0300 |
| commit | 63e51fd33fef04b634a0c32ae491ab16a19cb17c (patch) | |
| tree | 5996a950867d6a946d4404100ff2950e34d17563 /sound/soc/sof/intel/hda.h | |
| parent | 207bf12f642f39e749ca65d3efca9d48311e629f (diff) | |
| download | linux-63e51fd33fef04b634a0c32ae491ab16a19cb17c.tar.xz | |
ASoC: SOF: Intel: cnl: Implement feature to support DSP D0i3 in S0
This patch implements support for DSP D0i3 when the system
is in S0. The basic idea is to schedule a delayed work after
every successful IPC TX that checks if there are only
D0I3-compatible streams active and if so transition
the DSP to D0I3.
With the introduction of DSP D0I3 in S0, we need to
ensure that the DSP is in D0I0 before sending any new
IPCs. The exception for this would be the
compact IPCs that are used to set the DSP in
D0I3/D0I0 states.
Signed-off-by: Keyon Jie <yang.jie@linux.intel.com>
Signed-off-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20200129220726.31792-9-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound/soc/sof/intel/hda.h')
| -rw-r--r-- | sound/soc/sof/intel/hda.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/sound/soc/sof/intel/hda.h b/sound/soc/sof/intel/hda.h index 02c2a7eadb1b..a46b66437a3d 100644 --- a/sound/soc/sof/intel/hda.h +++ b/sound/soc/sof/intel/hda.h @@ -392,6 +392,13 @@ struct sof_intel_dsp_bdl { #define SOF_HDA_PLAYBACK 0 #define SOF_HDA_CAPTURE 1 +/* + * Time in ms for opportunistic D0I3 entry delay. + * This has been deliberately chosen to be long to avoid race conditions. + * Could be optimized in future. + */ +#define SOF_HDA_D0I3_WORK_DELAY_MS 5000 + /* HDA DSP D0 substate */ enum sof_hda_D0_substate { SOF_HDA_DSP_PM_D0I0, /* default D0 substate */ @@ -420,6 +427,9 @@ struct sof_intel_hda_dev { /* DMIC device */ struct platform_device *dmic_dev; + + /* delayed work to enter D0I3 opportunistically */ + struct delayed_work d0i3_work; }; static inline struct hdac_bus *sof_to_bus(struct snd_sof_dev *s) @@ -487,6 +497,7 @@ void hda_dsp_dump_skl(struct snd_sof_dev *sdev, u32 flags); void hda_dsp_dump(struct snd_sof_dev *sdev, u32 flags); void hda_ipc_dump(struct snd_sof_dev *sdev); void hda_ipc_irq_dump(struct snd_sof_dev *sdev); +void hda_dsp_d0i3_work(struct work_struct *work); /* * DSP PCM Operations. |