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ASoC: rt715-sdca: enable pm_runtime in probe, keep status as 'suspended'

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This patch suggests enabling pm_runtime during the probe, but marking the
device as 'active' only after it is enumerated. That will force a
dependency between the card and the codec, pm_runtime_get_sync() will
have to wait for the codec device to resume and hence implicitly wait
for the enumeration/initialization to be completed. In the nominal
case where the codec device is already active the get_sync() would
only perform a ref-count increase.

The changes are directly inspired by RT711 and RT711-sdca changes.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Rander Wang <rander.wang@intel.com>
Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Link: https://lore.kernel.org/r/20230802153629.53576-11-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Pierre-Louis Bossart 2023-08-02 10:36:23 -05:00 committed by Mark Brown
parent 279be59195
commit e4a3b8cf40
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
2 changed files with 25 additions and 14 deletions
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5
sound/soc/codecs/rt715-sdca-sdw.c
View File

@ -193,10 +193,7 @@ static int rt715_sdca_sdw_probe(struct sdw_slave *slave,
static int rt715_sdca_sdw_remove(struct sdw_slave *slave)
{
struct rt715_sdca_priv *rt715 = dev_get_drvdata(&slave->dev);
if (rt715->first_hw_init)
pm_runtime_disable(&slave->dev);
pm_runtime_disable(&slave->dev);
return 0;
}

34
sound/soc/codecs/rt715-sdca.c
View File

@ -761,8 +761,12 @@ static const struct snd_soc_dapm_route rt715_sdca_audio_map[] = {
static int rt715_sdca_probe(struct snd_soc_component *component)
{
struct rt715_sdca_priv *rt715 = snd_soc_component_get_drvdata(component);
int ret;
if (!rt715->first_hw_init)
return 0;
ret = pm_runtime_resume(component->dev);
if (ret < 0 && ret != -EACCES)
return ret;
@ -992,6 +996,25 @@ int rt715_sdca_init(struct device *dev, struct regmap *mbq_regmap,
&soc_codec_dev_rt715_sdca,
rt715_sdca_dai,
ARRAY_SIZE(rt715_sdca_dai));
if (ret < 0)
return ret;
/* set autosuspend parameters */
pm_runtime_set_autosuspend_delay(dev, 3000);
pm_runtime_use_autosuspend(dev);
/* make sure the device does not suspend immediately */
pm_runtime_mark_last_busy(dev);
pm_runtime_enable(dev);
/* important note: the device is NOT tagged as 'active' and will remain
* 'suspended' until the hardware is enumerated/initialized. This is required
* to make sure the ASoC framework use of pm_runtime_get_sync() does not silently
* fail with -EACCESS because of race conditions between card creation and enumeration
*/
dev_dbg(dev, "%s\n", __func__);
return ret;
}
@ -1008,21 +1031,12 @@ int rt715_sdca_io_init(struct device *dev, struct sdw_slave *slave)
regcache_cache_only(rt715->mbq_regmap, false);
/*
* PM runtime is only enabled when a Slave reports as Attached
* PM runtime status is marked as 'active' only when a Slave reports as Attached
*/
if (!rt715->first_hw_init) {
/* set autosuspend parameters */
pm_runtime_set_autosuspend_delay(&slave->dev, 3000);
pm_runtime_use_autosuspend(&slave->dev);
/* update count of parent 'active' children */
pm_runtime_set_active(&slave->dev);
/* make sure the device does not suspend immediately */
pm_runtime_mark_last_busy(&slave->dev);
pm_runtime_enable(&slave->dev);
rt715->first_hw_init = true;
}