DMI L1 entry is currently disabled whenever any capture stream is opened to prevent xruns during pause/release. But, in order to maximise power savings for the wake-on-voice usecase, DMI L1 entry should be enabled for D0i3-compatible capture streams. Introduce a new field, flags in struct sof_intel_hda_stream that stores whether a stream is dmi_l1_compatible. All playback streams, and D0i3-compatible capture streams are DMI L1 compatible.

Reviewed-by: Pierre-Louis Bossart pierre-louis.bossart@linux.intel.com Reviewed-by: Kai Vehmanen kai.vehmanen@linux.intel.com Signed-off-by: Ranjani Sridharan ranjani.sridharan@linux.intel.com --- sound/soc/sof/intel/hda-compress.c | 2 +- sound/soc/sof/intel/hda-loader.c | 2 +- sound/soc/sof/intel/hda-pcm.c | 16 ++++++++++++- sound/soc/sof/intel/hda-stream.c | 38 +++++++++++++++++------------- sound/soc/sof/intel/hda-trace.c | 3 +-- sound/soc/sof/intel/hda.h | 6 ++++- 6 files changed, 45 insertions(+), 22 deletions(-)

diff --git a/sound/soc/sof/intel/hda-compress.c b/sound/soc/sof/intel/hda-compress.c index 53c08034fa22..c6cf7b313934 100644 --- a/sound/soc/sof/intel/hda-compress.c +++ b/sound/soc/sof/intel/hda-compress.c @@ -25,7 +25,7 @@ int hda_probe_compr_assign(struct snd_sof_dev *sdev, { struct hdac_ext_stream *stream;

- stream = hda_dsp_stream_get(sdev, cstream->direction); + stream = hda_dsp_stream_get(sdev, cstream->direction, 0); if (!stream) return -EBUSY;

diff --git a/sound/soc/sof/intel/hda-loader.c b/sound/soc/sof/intel/hda-loader.c index ed773696b495..365a79fc7081 100644 --- a/sound/soc/sof/intel/hda-loader.c +++ b/sound/soc/sof/intel/hda-loader.c @@ -35,7 +35,7 @@ static struct hdac_ext_stream *cl_stream_prepare(struct snd_sof_dev *sdev, unsig struct pci_dev *pci = to_pci_dev(sdev->dev); int ret;

- dsp_stream = hda_dsp_stream_get(sdev, direction); + dsp_stream = hda_dsp_stream_get(sdev, direction, 0);

if (!dsp_stream) { dev_err(sdev->dev, "error: no stream available\n"); diff --git a/sound/soc/sof/intel/hda-pcm.c b/sound/soc/sof/intel/hda-pcm.c index 5d35bb18660a..689934131a68 100644 --- a/sound/soc/sof/intel/hda-pcm.c +++ b/sound/soc/sof/intel/hda-pcm.c @@ -215,11 +215,25 @@ snd_pcm_uframes_t hda_dsp_pcm_pointer(struct snd_sof_dev *sdev, int hda_dsp_pcm_open(struct snd_sof_dev *sdev, struct snd_pcm_substream *substream) { + struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); + struct snd_soc_component *scomp = sdev->component; struct hdac_ext_stream *dsp_stream; + struct snd_sof_pcm *spcm; int direction = substream->stream; + u32 flags = 0; + + spcm = snd_sof_find_spcm_dai(scomp, rtd); + if (!spcm) { + dev_err(sdev->dev, "error: can't find PCM with DAI ID %d\n", rtd->dai_link->id); + return -EINVAL; + }

- dsp_stream = hda_dsp_stream_get(sdev, direction); + /* All playback and D0i3 compatible streams are DMI L1 capable */ + if (direction == SNDRV_PCM_STREAM_PLAYBACK || + spcm->stream[substream->stream].d0i3_compatible) + flags |= SOF_HDA_STREAM_DMI_L1_COMPATIBLE;

+ dsp_stream = hda_dsp_stream_get(sdev, direction, flags); if (!dsp_stream) { dev_err(sdev->dev, "error: no stream available\n"); return -ENODEV; diff --git a/sound/soc/sof/intel/hda-stream.c b/sound/soc/sof/intel/hda-stream.c index 0e09ede922c7..40a3993ae2cb 100644 --- a/sound/soc/sof/intel/hda-stream.c +++ b/sound/soc/sof/intel/hda-stream.c @@ -155,7 +155,7 @@ int hda_dsp_stream_spib_config(struct snd_sof_dev *sdev,

/* get next unused stream */ struct hdac_ext_stream * -hda_dsp_stream_get(struct snd_sof_dev *sdev, int direction) +hda_dsp_stream_get(struct snd_sof_dev *sdev, int direction, u32 flags) { struct hdac_bus *bus = sof_to_bus(sdev); struct sof_intel_hda_stream *hda_stream; @@ -183,18 +183,22 @@ hda_dsp_stream_get(struct snd_sof_dev *sdev, int direction) spin_unlock_irq(&bus->reg_lock);

/* stream found ? */ - if (!stream) + if (!stream) { dev_err(sdev->dev, "error: no free %s streams\n", direction == SNDRV_PCM_STREAM_PLAYBACK ? "playback" : "capture"); + return stream; + } + + hda_stream->flags = flags;

/* - * Disable DMI Link L1 entry when capture stream is opened. + * Prevent DMI Link L1 entry for streams that don't support it. * Workaround to address a known issue with host DMA that results * in xruns during pause/release in capture scenarios. */ if (!IS_ENABLED(CONFIG_SND_SOC_SOF_HDA_ALWAYS_ENABLE_DMI_L1)) - if (stream && direction == SNDRV_PCM_STREAM_CAPTURE) + if (stream && !(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); @@ -206,37 +210,39 @@ hda_dsp_stream_get(struct snd_sof_dev *sdev, int direction) int hda_dsp_stream_put(struct snd_sof_dev *sdev, int direction, int stream_tag) { struct hdac_bus *bus = sof_to_bus(sdev); + struct sof_intel_hda_stream *hda_stream; + struct hdac_ext_stream *stream; struct hdac_stream *s; - bool active_capture_stream = false; + bool dmi_l1_enable = true; bool found = false;

spin_lock_irq(&bus->reg_lock);

/* - * close stream matching the stream tag - * and check if there are any open capture streams. + * close stream matching the stream tag and check if there are any open streams + * that are DMI L1 incompatible. */ list_for_each_entry(s, &bus->stream_list, list) { + stream = stream_to_hdac_ext_stream(s); + hda_stream = container_of(stream, struct sof_intel_hda_stream, hda_stream); + if (!s->opened) continue;

if (s->direction == direction && s->stream_tag == stream_tag) { s->opened = false; found = true; - } else if (s->direction == SNDRV_PCM_STREAM_CAPTURE) { - active_capture_stream = true; + } else if (!(hda_stream->flags & SOF_HDA_STREAM_DMI_L1_COMPATIBLE)) { + dmi_l1_enable = false; } }

spin_unlock_irq(&bus->reg_lock);

- /* Enable DMI L1 entry if there are no capture streams open */ - if (!IS_ENABLED(CONFIG_SND_SOC_SOF_HDA_ALWAYS_ENABLE_DMI_L1)) - if (!active_capture_stream) - 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 DMI L1 if permitted */ + if (!IS_ENABLED(CONFIG_SND_SOC_SOF_HDA_ALWAYS_ENABLE_DMI_L1) && 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);

if (!found) { dev_dbg(sdev->dev, "stream_tag %d not opened!\n", stream_tag); diff --git a/sound/soc/sof/intel/hda-trace.c b/sound/soc/sof/intel/hda-trace.c index 1eb746d5adeb..ca869038e909 100644 --- a/sound/soc/sof/intel/hda-trace.c +++ b/sound/soc/sof/intel/hda-trace.c @@ -42,8 +42,7 @@ int hda_dsp_trace_init(struct snd_sof_dev *sdev, u32 *stream_tag) struct sof_intel_hda_dev *hda = sdev->pdata->hw_pdata; int ret;

- hda->dtrace_stream = hda_dsp_stream_get(sdev, - SNDRV_PCM_STREAM_CAPTURE); + hda->dtrace_stream = hda_dsp_stream_get(sdev, SNDRV_PCM_STREAM_CAPTURE, 0);

if (!hda->dtrace_stream) { dev_err(sdev->dev, diff --git a/sound/soc/sof/intel/hda.h b/sound/soc/sof/intel/hda.h index a3b6f3e9121c..8e39d1e16178 100644 --- a/sound/soc/sof/intel/hda.h +++ b/sound/soc/sof/intel/hda.h @@ -402,6 +402,9 @@ struct sof_intel_dsp_bdl { #define SOF_HDA_PLAYBACK 0 #define SOF_HDA_CAPTURE 1

+/* stream flags */ +#define SOF_HDA_STREAM_DMI_L1_COMPATIBLE 1 + /* * Time in ms for opportunistic D0I3 entry delay. * This has been deliberately chosen to be long to avoid race conditions. @@ -471,6 +474,7 @@ struct sof_intel_hda_stream { struct hdac_ext_stream hda_stream; struct sof_intel_stream stream; int host_reserved; /* reserve host DMA channel */ + u32 flags; };

#define hstream_to_sof_hda_stream(hstream) \ @@ -562,7 +566,7 @@ bool hda_dsp_check_ipc_irq(struct snd_sof_dev *sdev); bool hda_dsp_check_stream_irq(struct snd_sof_dev *sdev);

struct hdac_ext_stream * - hda_dsp_stream_get(struct snd_sof_dev *sdev, int direction); + hda_dsp_stream_get(struct snd_sof_dev *sdev, int direction, u32 flags); int hda_dsp_stream_put(struct snd_sof_dev *sdev, int direction, int stream_tag); int hda_dsp_stream_spib_config(struct snd_sof_dev *sdev, struct hdac_ext_stream *stream,