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ASoC: pcm: update the start-up sequence for playback

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Codec should be started before the CPU to ensure that there is no data
loss during playback.Current sequence enables the CPU first followed by
codec.This change updates the sequence prevent any playback data loss.

Signed-off-by: Gopikrishnaiah Anandan <agopik@codeaurora.org>
Signed-off-by: Banajit Goswami <bgoswami@codeaurora.org>
Signed-off-by: Sudheer Papothi <spapothi@codeaurora.org>
This commit is contained in:
Sudheer Papothi 2016-01-29 06:21:36 +05:30 • committed by David Keitel
parent f1031ca0f7
commit a73f468d5e
1 changed files with 17 additions and 1 deletions
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18
sound/soc/soc-pcm.c
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@ -763,6 +763,11 @@ static int soc_pcm_prepare(struct snd_pcm_substream *substream)
mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
snd_soc_dapm_stream_event(rtd,
SNDRV_PCM_STREAM_PLAYBACK,
SND_SOC_DAPM_STREAM_START);
if (rtd->dai_link->ops && rtd->dai_link->ops->prepare) {
ret = rtd->dai_link->ops->prepare(substream);
if (ret < 0) {
@ -811,8 +816,12 @@ static int soc_pcm_prepare(struct snd_pcm_substream *substream)
cancel_delayed_work(&rtd->delayed_work);
}
snd_soc_dapm_stream_event(rtd, substream->stream,
if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
if (codec_dai->capture_active == 1)
snd_soc_dapm_stream_event(rtd,
SNDRV_PCM_STREAM_CAPTURE,
SND_SOC_DAPM_STREAM_START);
}
for (i = 0; i < rtd->num_codecs; i++)
snd_soc_dai_digital_mute(rtd->codec_dais[i], 0,
@ -820,6 +829,13 @@ static int soc_pcm_prepare(struct snd_pcm_substream *substream)
snd_soc_dai_digital_mute(cpu_dai, 0, substream->stream);
out:
if (ret < 0 && substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
pr_err("%s: Issue stop stream for codec_dai due to op failure %d = ret\n",
__func__, ret);
snd_soc_dapm_stream_event(rtd,
SNDRV_PCM_STREAM_PLAYBACK,
SND_SOC_DAPM_STREAM_STOP);
}
mutex_unlock(&rtd->pcm_mutex);
return ret;
}