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/rt700-sdw.c | 3 +-- sound/soc/codecs/rt700.c | 39 ++++++++++++++++++++++++------------ 2 files changed, 27 insertions(+), 15 deletions(-)
diff --git a/sound/soc/codecs/rt700-sdw.c b/sound/soc/codecs/rt700-sdw.c index 53e7973e0bf9..52c33d56b143 100644 --- a/sound/soc/codecs/rt700-sdw.c +++ b/sound/soc/codecs/rt700-sdw.c @@ -464,8 +464,7 @@ static int rt700_sdw_remove(struct sdw_slave *slave) cancel_delayed_work_sync(&rt700->jack_btn_check_work); }
- if (rt700->first_hw_init) - pm_runtime_disable(&slave->dev); + pm_runtime_disable(&slave->dev);
return 0; } diff --git a/sound/soc/codecs/rt700.c b/sound/soc/codecs/rt700.c index b774349dfdae..0ebf344a1b60 100644 --- a/sound/soc/codecs/rt700.c +++ b/sound/soc/codecs/rt700.c @@ -320,6 +320,10 @@ static int rt700_set_jack_detect(struct snd_soc_component *component,
rt700->hs_jack = hs_jack;
+ /* we can only resume if the device was initialized at least once */ + if (!rt700->first_hw_init) + return 0; + ret = pm_runtime_resume_and_get(component->dev); if (ret < 0) { if (ret != -EACCES) { @@ -823,6 +827,9 @@ static int rt700_probe(struct snd_soc_component *component)
rt700->component = component;
+ if (!rt700->first_hw_init) + return 0; + ret = pm_runtime_resume(component->dev); if (ret < 0 && ret != -EACCES) return ret; @@ -1119,10 +1126,26 @@ int rt700_init(struct device *dev, struct regmap *sdw_regmap, &soc_codec_dev_rt700, rt700_dai, ARRAY_SIZE(rt700_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(&slave->dev, "%s\n", __func__);
- return ret; + return 0; }
int rt700_io_init(struct device *dev, struct sdw_slave *slave) @@ -1141,20 +1164,10 @@ int rt700_io_init(struct device *dev, struct sdw_slave *slave) /* * PM runtime is only enabled when a Slave reports as Attached */ - if (!rt700->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 */ + if (!rt700->first_hw_init) + /* PM runtime status is marked as 'active' only when a Slave reports as Attached */ 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);
/* reset */