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

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Message-Id: <20220817080529.10864-5-daniel.baluta@oss.nxp.com>
Date:   Wed, 17 Aug 2022 11:05:29 +0300
From:   Daniel Baluta <daniel.baluta@....nxp.com>
To:     broonie@...nel.org, alsa-devel@...a-project.org
Cc:     linux-kernel@...r.kernel.org, peter.ujfalusi@...ux.intel.com,
        yung-chuan.liao@...ux.intel.com, ranjani.sridharan@...ux.intel.com,
        kai.vehmanen@...ux.intel.com, lgirdwood@...il.com,
        pierre-louis.bossart@...ux.intel.com, daniel.baluta@...il.com,
        laurentiu.mihalcea@....com, Paul Olaru <paul.olaru@....nxp.com>,
        Daniel Baluta <daniel.baluta@....com>
Subject: [PATCH 4/4] ASoC: SOF: compress: Add support for computing timestamps

From: Laurentiu Mihalcea <laurentiu.mihalcea@....com>

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@....nxp.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
Signed-off-by: Laurentiu Mihalcea <laurentiu.mihalcea@....com>
Signed-off-by: Daniel Baluta <daniel.baluta@....com>
---
 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