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ASoC: max98363: 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/20230802153629.53576-16-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 10:36:28 -05:00 committed by Mark Brown
parent 4af11e11de
commit d6ce285641
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
1 changed files with 20 additions and 14 deletions
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34
sound/soc/codecs/max98363.c
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@ -165,22 +165,12 @@ static int max98363_io_init(struct sdw_slave *slave)
regcache_cache_bypass(max98363->regmap, true);
/*
* 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 (!max98363->first_hw_init) {
/* set autosuspend parameters */
pm_runtime_set_autosuspend_delay(dev, 3000);
pm_runtime_use_autosuspend(dev);
if (!max98363->first_hw_init)
/* update count of parent 'active' children */
pm_runtime_set_active(dev);
/* make sure the device does not suspend immediately */
pm_runtime_mark_last_busy(dev);
pm_runtime_enable(dev);
}
pm_runtime_get_noresume(dev);
ret = regmap_read(max98363->regmap, MAX98363_R21FF_REV_ID, &reg);
@ -417,10 +407,26 @@ static int max98363_init(struct sdw_slave *slave, struct regmap *regmap)
ret = devm_snd_soc_register_component(dev, &soc_codec_dev_max98363,
max98363_dai,
ARRAY_SIZE(max98363_dai));
if (ret < 0)
if (ret < 0) {
dev_err(dev, "Failed to register codec: %d\n", ret);
return ret;
}
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
*/
return 0;
}
static int max98363_sdw_probe(struct sdw_slave *slave,