ALSA: hda: update the power_state during the direct-complete

The patch_realtek.c needs to check if the power_state.event equals
PM_EVENT_SUSPEND, after using the direct-complete, the suspend() and
resume() will be skipped if the codec is already rt_suspended, in this
case, the patch_realtek.c will always get PM_EVENT_ON even the system
is really resumed from S3.

We could set power_state to PMSG_SUSPEND in the prepare(), if other
PM functions are called before complete(), those functions will
override power_state; if no other PM functions are called before
complete(), we could know the suspend() and resume() are skipped since
only S3 pm functions could be skipped by direct-complete, in this case
set power_state to PMSG_RESUME in the complete(). This could guarantee
the first time of calling hda_codec_runtime_resume() after complete()
has the correct power_state.

Fixes: 215a22ed31a1 ("ALSA: hda: Refactor codec PM to use direct-complete optimization")
Cc: <stable@vger.kernel.org>
Signed-off-by: Hui Wang <hui.wang@canonical.com>
Link: https://lore.kernel.org/r/20210602145424.3132-1-hui.wang@canonical.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c
index a31009afc025f673741983ed7de7fc24ba58de6c..5462f771c2f90664df3eac9e9c3b5a2205210129 100644 (file)
--- a/sound/pci/hda/hda_codec.c
+++ b/sound/pci/hda/hda_codec.c
@@ -2917,6 +2917,7 @@ static int hda_codec_runtime_resume(struct device *dev)
 #ifdef CONFIG_PM_SLEEP
 static int hda_codec_pm_prepare(struct device *dev)
 {
+       dev->power.power_state = PMSG_SUSPEND;
        return pm_runtime_suspended(dev);
 }
 
@@ -2924,6 +2925,10 @@ static void hda_codec_pm_complete(struct device *dev)
 {
        struct hda_codec *codec = dev_to_hda_codec(dev);
 
+       /* If no other pm-functions are called between prepare() and complete() */
+       if (dev->power.power_state.event == PM_EVENT_SUSPEND)
+               dev->power.power_state = PMSG_RESUME;
+
        if (pm_runtime_suspended(dev) && (codec->jackpoll_interval ||
            hda_codec_need_resume(codec) || codec->forced_resume))
                pm_request_resume(dev);