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ASoC: SOF: add get_stream_position ops for pcm delay

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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>
Link: https://lore.kernel.org/r/20230202132954.26773-8-peter.ujfalusi@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Rander Wang 2023-02-02 15:29:52 +02:00 committed by Mark Brown
parent 27c2100b6b
commit 7f95629727
No known key found for this signature in database
GPG key ID: 24D68B725D5487D0
2 changed files with 19 additions and 0 deletions
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10
sound/soc/sof/ops.h
View file

@ -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)

9
sound/soc/sof/sof-priv.h
View file

@ -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,