From: Rander Wang rander.wang@intel.com
PCM delay depends on stream position based on hardware counter to calculate stream delay so add this ops to get stream position according to hardware counter.
Signed-off-by: Rander Wang rander.wang@intel.com Reviewed-by: Pierre-Louis Bossart pierre-louis.bossart@linux.intel.com Reviewed-by: Ranjani Sridharan ranjani.sridharan@linux.intel.com Reviewed-by: Bard Liao yung-chuan.liao@linux.intel.com Signed-off-by: Peter Ujfalusi peter.ujfalusi@linux.intel.com --- sound/soc/sof/ops.h | 10 ++++++++++ sound/soc/sof/sof-priv.h | 9 +++++++++ 2 files changed, 19 insertions(+)
diff --git a/sound/soc/sof/ops.h b/sound/soc/sof/ops.h index febe318b9427..03752c8405ca 100644 --- a/sound/soc/sof/ops.h +++ b/sound/soc/sof/ops.h @@ -511,6 +511,16 @@ static inline int snd_sof_pcm_platform_ack(struct snd_sof_dev *sdev, return 0; }
+static inline u64 snd_sof_pcm_get_stream_position(struct snd_sof_dev *sdev, + struct snd_soc_component *component, + struct snd_pcm_substream *substream) +{ + if (sof_ops(sdev) && sof_ops(sdev)->get_stream_position) + return sof_ops(sdev)->get_stream_position(sdev, component, substream); + + return 0; +} + /* machine driver */ static inline int snd_sof_machine_register(struct snd_sof_dev *sdev, void *pdata) diff --git a/sound/soc/sof/sof-priv.h b/sound/soc/sof/sof-priv.h index fd1c3b17a396..14f7adb2dc12 100644 --- a/sound/soc/sof/sof-priv.h +++ b/sound/soc/sof/sof-priv.h @@ -248,6 +248,15 @@ struct snd_sof_dsp_ops { /* pcm ack */ int (*pcm_ack)(struct snd_sof_dev *sdev, struct snd_pcm_substream *substream); /* optional */
+ /* + * optional callback to retrieve the link DMA position for the substream + * when the position is not reported in the shared SRAM windows but + * instead from a host-accessible hardware counter. + */ + u64 (*get_stream_position)(struct snd_sof_dev *sdev, + struct snd_soc_component *component, + struct snd_pcm_substream *substream); /* optional */ + /* host read DSP stream data */ int (*ipc_msg_data)(struct snd_sof_dev *sdev, struct snd_sof_pcm_stream *sps,