Unverified Commit a921986f authored by Chunxu Li's avatar Chunxu Li Committed by Mark Brown
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ASoC: SOF: mediatek: add pcm_pointer callback for mt8186 



add pcm_pointer callback for mt8186 to support read
host position from DSP

Signed-off-by: default avatarChunxu Li <chunxu.li@mediatek.com>
Reviewed-by: default avatarAngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20220921120239.31934-1-chunxu.li@mediatek.com


Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 843e10b3

sound/soc/sof/mediatek/mt8186/mt8186.c

+33 −0
Original line number Diff line number Diff line
@@ -470,6 +470,38 @@ static int mt8186_pcm_hw_params(struct snd_sof_dev *sdev, 
	return 0;

}



static snd_pcm_uframes_t mt8186_pcm_pointer(struct snd_sof_dev *sdev,

					    struct snd_pcm_substream *substream)

{

	int ret;

	snd_pcm_uframes_t pos;

	struct snd_sof_pcm *spcm;

	struct sof_ipc_stream_posn posn;

	struct snd_sof_pcm_stream *stream;

	struct snd_soc_component *scomp = sdev->component;

	struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);



	spcm = snd_sof_find_spcm_dai(scomp, rtd);

	if (!spcm) {

		dev_warn_ratelimited(sdev->dev, "warn: can't find PCM with DAI ID %d\n",

				     rtd->dai_link->id);

		return 0;

	}



	stream = &spcm->stream[substream->stream];

	ret = snd_sof_ipc_msg_data(sdev, stream->substream, &posn, sizeof(posn));

	if (ret < 0) {

		dev_warn(sdev->dev, "failed to read stream position: %d\n", ret);

		return 0;

	}



	memcpy(&stream->posn, &posn, sizeof(posn));

	pos = spcm->stream[substream->stream].posn.host_posn;

	pos = bytes_to_frames(substream->runtime, pos);



	return pos;

}



static struct snd_soc_dai_driver mt8186_dai[] = {

{

	.name = "SOF_DL1",
@@ -537,6 +569,7 @@ static struct snd_sof_dsp_ops sof_mt8186_ops = { 
	/* stream callbacks */

	.pcm_open	= sof_stream_pcm_open,

	.pcm_hw_params	= mt8186_pcm_hw_params,

	.pcm_pointer	= mt8186_pcm_pointer,

	.pcm_close	= sof_stream_pcm_close,



	/* firmware loading */