[PATCH 4/4] ASoC: SOF: compress: Add support for computing timestamps

From: Daniel Baluta
Date: Wed Aug 17 2022 - 04:06:22 EST


From: Laurentiu Mihalcea <laurentiu.mihalcea@xxxxxxx>

We compute the number of pcm_io_frames by dividing the
dai position to size of a frame (channels * sample size).

Reviewed-by: Paul Olaru <paul.olaru@xxxxxxxxxxx>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@xxxxxxxxxxxxxxx>
Signed-off-by: Laurentiu Mihalcea <laurentiu.mihalcea@xxxxxxx>
Signed-off-by: Daniel Baluta <daniel.baluta@xxxxxxx>
---
sound/soc/sof/compress.c | 11 +++++++++++
1 file changed, 11 insertions(+)

diff --git a/sound/soc/sof/compress.c b/sound/soc/sof/compress.c
index ac79b46ce3b9..174b3d8e67dd 100644
--- a/sound/soc/sof/compress.c
+++ b/sound/soc/sof/compress.c
@@ -327,10 +327,21 @@ static int sof_compr_pointer(struct snd_soc_component *component,
struct snd_compr_stream *cstream,
struct snd_compr_tstamp *tstamp)
{
+ u64 dai_posn;
+ struct snd_sof_pcm *spcm;
+ struct snd_soc_pcm_runtime *rtd = cstream->private_data;
struct sof_compr_stream *sstream = cstream->runtime->private_data;

+ spcm = snd_sof_find_spcm_dai(component, rtd);
+ if (!spcm)
+ return -EINVAL;
+
+ dai_posn = spcm->stream[cstream->direction].posn.dai_posn;
+
tstamp->sampling_rate = sstream->sampling_rate;
tstamp->copied_total = sstream->copied_total;
+ tstamp->pcm_io_frames = div_u64(spcm->stream[cstream->direction].posn.dai_posn,
+ sstream->channels * sstream->sample_container_bytes);

return 0;
}
--
2.27.0