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 --- sound/soc/codecs/rt712-sdca-dmic.c | 40 ++++++++++++++++++------------ 1 file changed, 24 insertions(+), 16 deletions(-)
diff --git a/sound/soc/codecs/rt712-sdca-dmic.c b/sound/soc/codecs/rt712-sdca-dmic.c index 0102bad0b66a..ba08d03e717c 100644 --- a/sound/soc/codecs/rt712-sdca-dmic.c +++ b/sound/soc/codecs/rt712-sdca-dmic.c @@ -189,20 +189,11 @@ static int rt712_sdca_dmic_io_init(struct device *dev, struct sdw_slave *slave) regcache_cache_bypass(rt712->mbq_regmap, true); } else { /* - * 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 */
- /* 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); }
pm_runtime_get_noresume(&slave->dev); @@ -608,6 +599,9 @@ static int rt712_sdca_dmic_probe(struct snd_soc_component *component)
rt712->component = component;
+ if (!rt712->first_hw_init) + return 0; + ret = pm_runtime_resume(component->dev); if (ret < 0 && ret != -EACCES) return ret; @@ -794,10 +788,27 @@ static int rt712_sdca_dmic_init(struct device *dev, struct regmap *regmap, &soc_sdca_dev_rt712_dmic, rt712_sdca_dmic_dai, ARRAY_SIZE(rt712_sdca_dmic_dai)); + if (ret < 0) + return ret;
- dev_dbg(&slave->dev, "%s\n", __func__); + /* set autosuspend parameters */ + pm_runtime_set_autosuspend_delay(dev, 3000); + pm_runtime_use_autosuspend(dev);
- return ret; + /* 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 0; }
@@ -957,10 +968,7 @@ static int rt712_sdca_dmic_sdw_probe(struct sdw_slave *slave,
static int rt712_sdca_dmic_sdw_remove(struct sdw_slave *slave) { - struct rt712_sdca_dmic_priv *rt712 = dev_get_drvdata(&slave->dev); - - if (rt712->first_hw_init) - pm_runtime_disable(&slave->dev); + pm_runtime_disable(&slave->dev);
return 0; }