From: Rander Wang <rander.wang@xxxxxxxxx>
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@xxxxxxxxx>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@xxxxxxxxxxxxxxx>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@xxxxxxxxxxxxxxx>
Reviewed-by: Bard Liao <yung-chuan.liao@xxxxxxxxxxxxxxx>
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@xxxxxxxxxxxxxxx>
---
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,
--
2.39.1
