From: Kai-Heng Feng <kai.heng.feng@canonical.com>
To: tiwai@suse.com
Cc: "moderated list:SOUND" <alsa-devel@alsa-project.org>,
Kai Vehmanen <kai.vehmanen@linux.intel.com>,
Harsha Priya <harshapriya.n@intel.com>,
open list <linux-kernel@vger.kernel.org>,
Mark Brown <broonie@kernel.org>,
Randy Dunlap <rdunlap@infradead.org>,
Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>,
Ranjani Sridharan <ranjani.sridharan@linux.intel.com>,
Kai-Heng Feng <kai.heng.feng@canonical.com>,
"Kenneth R . Crudup" <kenny@panix.com>
Subject: [PATCH v2] ALSA: hda: Balance runtime/system PM if direct-complete is disabled
Date: Tue, 19 Jan 2021 23:21:43 +0800 [thread overview]
Message-ID: <20210119152145.346558-1-kai.heng.feng@canonical.com> (raw)
After hibernation, HDA controller can't be runtime-suspended after
commit 215a22ed31a1 ("ALSA: hda: Refactor codjc PM to use
direct-complete optimization"), which enables direct-complete for HDA
codec.
The HDA codec driver didn't expect direct-complete will be disabled
after it returns a positive value from prepare() callback. However,
there are some places that PM core can disable direct-complete. For
instance, system hibernation or when codec has subordinates like LEDs.
So if the codec is prepared for direct-complete but PM core still calls
codec's suspend or freeze callback, partially revert the commit and take
the original approach, which uses pm_runtime_force_*() helpers to
ensure PM refcount are balanced. Meanwhile, still keep prepare() and
complete() callbacks to enable direct-complete and request a resume for
jack detection, respectively.
Reported-by: Kenneth R. Crudup <kenny@panix.com>
Fixes: 215a22ed31a1 ("ALSA: hda: Refactor codec PM to use direct-complete optimization")
Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
---
v2:
- Use pm_runtime_force_*() helpers to avoid suspend/resume ping pong.
sound/pci/hda/hda_codec.c | 24 +++++++-----------------
1 file changed, 7 insertions(+), 17 deletions(-)
diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c
index 687216e74526..eec1775dfffe 100644
--- a/sound/pci/hda/hda_codec.c
+++ b/sound/pci/hda/hda_codec.c
@@ -2934,7 +2934,7 @@ static void hda_call_codec_resume(struct hda_codec *codec)
snd_hdac_leave_pm(&codec->core);
}
-static int hda_codec_suspend(struct device *dev)
+static int hda_codec_runtime_suspend(struct device *dev)
{
struct hda_codec *codec = dev_to_hda_codec(dev);
unsigned int state;
@@ -2953,7 +2953,7 @@ static int hda_codec_suspend(struct device *dev)
return 0;
}
-static int hda_codec_resume(struct device *dev)
+static int hda_codec_runtime_resume(struct device *dev)
{
struct hda_codec *codec = dev_to_hda_codec(dev);
@@ -2968,16 +2968,6 @@ static int hda_codec_resume(struct device *dev)
return 0;
}
-static int hda_codec_runtime_suspend(struct device *dev)
-{
- return hda_codec_suspend(dev);
-}
-
-static int hda_codec_runtime_resume(struct device *dev)
-{
- return hda_codec_resume(dev);
-}
-
#endif /* CONFIG_PM */
#ifdef CONFIG_PM_SLEEP
@@ -2998,31 +2988,31 @@ static void hda_codec_pm_complete(struct device *dev)
static int hda_codec_pm_suspend(struct device *dev)
{
dev->power.power_state = PMSG_SUSPEND;
- return hda_codec_suspend(dev);
+ return pm_runtime_force_suspend(dev);
}
static int hda_codec_pm_resume(struct device *dev)
{
dev->power.power_state = PMSG_RESUME;
- return hda_codec_resume(dev);
+ return pm_runtime_force_resume(dev);
}
static int hda_codec_pm_freeze(struct device *dev)
{
dev->power.power_state = PMSG_FREEZE;
- return hda_codec_suspend(dev);
+ return pm_runtime_force_suspend(dev);
}
static int hda_codec_pm_thaw(struct device *dev)
{
dev->power.power_state = PMSG_THAW;
- return hda_codec_resume(dev);
+ return pm_runtime_force_resume(dev);
}
static int hda_codec_pm_restore(struct device *dev)
{
dev->power.power_state = PMSG_RESTORE;
- return hda_codec_resume(dev);
+ return pm_runtime_force_resume(dev);
}
#endif /* CONFIG_PM_SLEEP */
--
2.29.2
next reply other threads:[~2021-01-19 15:23 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-19 15:21 Kai-Heng Feng [this message]
2021-01-19 15:48 ` [PATCH v2] ALSA: hda: Balance runtime/system PM if direct-complete is disabled Takashi Iwai
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