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ASoC: Intel: avs: Fix sound clipping in single capture scenario

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To avoid sound clipping when there just one, single CAPTURE stream
ongoing, disable L1SEN before it is started. Any PLAYBACK stream or
additional CAPTURE allows L1SEN to be re-enabled.

Reviewed-by: Amadeusz Sławiński <amadeuszx.slawinski@linux.intel.com>
Signed-off-by: Cezary Rojewski <cezary.rojewski@intel.com>
Link: https://msgid.link/r/20240220115035.770402-3-cezary.rojewski@intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Cezary Rojewski 2024-02-20 12:50:27 +01:00 committed by Mark Brown
parent 1b72943ab1
commit e1a0cbae52
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
1 changed files with 75 additions and 2 deletions
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77
sound/soc/intel/avs/pcm.c
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@ -643,6 +643,79 @@ static int avs_dai_fe_prepare(struct snd_pcm_substream *substream, struct snd_so
return 0;
}
static void avs_hda_stream_start(struct hdac_bus *bus, struct hdac_ext_stream *host_stream)
{
struct hdac_stream *first_running = NULL;
struct hdac_stream *pos;
struct avs_dev *adev = hdac_to_avs(bus);
list_for_each_entry(pos, &bus->stream_list, list) {
if (pos->running) {
if (first_running)
break; /* more than one running */
first_running = pos;
}
}
/*
* If host_stream is a CAPTURE stream and will be the only one running,
* disable L1SEN to avoid sound clipping.
*/
if (!first_running) {
if (hdac_stream(host_stream)->direction == SNDRV_PCM_STREAM_CAPTURE)
avs_hda_l1sen_enable(adev, false);
snd_hdac_stream_start(hdac_stream(host_stream));
return;
}
snd_hdac_stream_start(hdac_stream(host_stream));
/*
* If host_stream is the first stream to break the rule above,
* re-enable L1SEN.
*/
if (list_entry_is_head(pos, &bus->stream_list, list) &&
first_running->direction == SNDRV_PCM_STREAM_CAPTURE)
avs_hda_l1sen_enable(adev, true);
}
static void avs_hda_stream_stop(struct hdac_bus *bus, struct hdac_ext_stream *host_stream)
{
struct hdac_stream *first_running = NULL;
struct hdac_stream *pos;
struct avs_dev *adev = hdac_to_avs(bus);
list_for_each_entry(pos, &bus->stream_list, list) {
if (pos == hdac_stream(host_stream))
continue; /* ignore stream that is about to be stopped */
if (pos->running) {
if (first_running)
break; /* more than one running */
first_running = pos;
}
}
/*
* If host_stream is a CAPTURE stream and is the only one running,
* re-enable L1SEN.
*/
if (!first_running) {
snd_hdac_stream_stop(hdac_stream(host_stream));
if (hdac_stream(host_stream)->direction == SNDRV_PCM_STREAM_CAPTURE)
avs_hda_l1sen_enable(adev, true);
return;
}
/*
* If by stopping host_stream there is only a single, CAPTURE stream running
* left, disable L1SEN to avoid sound clipping.
*/
if (list_entry_is_head(pos, &bus->stream_list, list) &&
first_running->direction == SNDRV_PCM_STREAM_CAPTURE)
avs_hda_l1sen_enable(adev, false);
snd_hdac_stream_stop(hdac_stream(host_stream));
}
static int avs_dai_fe_trigger(struct snd_pcm_substream *substream, int cmd, struct snd_soc_dai *dai)
{
struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
@ -664,7 +737,7 @@ static int avs_dai_fe_trigger(struct snd_pcm_substream *substream, int cmd, stru
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
spin_lock_irqsave(&bus->reg_lock, flags);
snd_hdac_stream_start(hdac_stream(host_stream));
avs_hda_stream_start(bus, host_stream);
spin_unlock_irqrestore(&bus->reg_lock, flags);
/* Timeout on DRSM poll shall not stop the resume so ignore the result. */
@ -694,7 +767,7 @@ static int avs_dai_fe_trigger(struct snd_pcm_substream *substream, int cmd, stru
dev_err(dai->dev, "pause FE path failed: %d\n", ret);
spin_lock_irqsave(&bus->reg_lock, flags);
snd_hdac_stream_stop(hdac_stream(host_stream));
avs_hda_stream_stop(bus, host_stream);
spin_unlock_irqrestore(&bus->reg_lock, flags);
ret = avs_path_reset(data->path);