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-sdw.c | 3 +-- sound/soc/codecs/rt712-sdca.c | 38 +++++++++++++++++++++---------- 2 files changed, 27 insertions(+), 14 deletions(-)
diff --git a/sound/soc/codecs/rt712-sdca-sdw.c b/sound/soc/codecs/rt712-sdca-sdw.c index 6bc50396a0f6..6b644a89c589 100644 --- a/sound/soc/codecs/rt712-sdca-sdw.c +++ b/sound/soc/codecs/rt712-sdca-sdw.c @@ -363,8 +363,7 @@ static int rt712_sdca_sdw_remove(struct sdw_slave *slave) cancel_delayed_work_sync(&rt712->jack_btn_check_work); }
- if (rt712->first_hw_init) - pm_runtime_disable(&slave->dev); + pm_runtime_disable(&slave->dev);
mutex_destroy(&rt712->calibrate_mutex); mutex_destroy(&rt712->disable_irq_lock); diff --git a/sound/soc/codecs/rt712-sdca.c b/sound/soc/codecs/rt712-sdca.c index 88f6c895722e..7077ff6ba1f4 100644 --- a/sound/soc/codecs/rt712-sdca.c +++ b/sound/soc/codecs/rt712-sdca.c @@ -453,6 +453,9 @@ static int rt712_sdca_set_jack_detect(struct snd_soc_component *component,
rt712->hs_jack = hs_jack;
+ if (!rt712->first_hw_init) + return 0; + ret = pm_runtime_resume_and_get(component->dev); if (ret < 0) { if (ret != -EACCES) { @@ -960,6 +963,9 @@ static int rt712_sdca_probe(struct snd_soc_component *component) rt712_sdca_parse_dt(rt712, &rt712->slave->dev); rt712->component = component;
+ if (!rt712->first_hw_init) + return 0; + ret = pm_runtime_resume(component->dev); if (ret < 0 && ret != -EACCES) return ret; @@ -1210,10 +1216,27 @@ int rt712_sdca_init(struct device *dev, struct regmap *regmap, else ret = devm_snd_soc_register_component(dev, &soc_sdca_dev_rt712, rt712_sdca_dai, 1); + 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; }
int rt712_sdca_io_init(struct device *dev, struct sdw_slave *slave) @@ -1234,20 +1257,11 @@ int rt712_sdca_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);