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ALSA: hda - jack poll once if jackpoll_interval==0 

With jackpoll_interval != 0, it's used to poll jack event periodically
in a delayed work. if it's 0, give the caller chance to probe jack status
but will not restart the delayed work.

In the next patch which enable WAKEEN feature, HDA controller was able to wake
up system when it's in D3, it's useful to detect Jack hotplug event and notify
userspace. By default the jackpoll_interval=0, this patch let jack poll once
without starting the delayed work.

Signed-off-by: Wang Xingchao <xingchao.wang@linux.intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Wang Xingchao 2013-07-25 23:34:45 -04:00 committed by Takashi Iwai
parent 7eaa9161ed
commit 18e6062756
1 changed files with 4 additions and 2 deletions
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6
sound/pci/hda/hda_codec.c
View File

@ -1216,11 +1216,13 @@ static void hda_jackpoll_work(struct work_struct *work)
{
struct hda_codec *codec =
container_of(work, struct hda_codec, jackpoll_work.work);
if (!codec->jackpoll_interval)
return;
snd_hda_jack_set_dirty_all(codec);
snd_hda_jack_poll_all(codec);
if (!codec->jackpoll_interval)
return;
queue_delayed_work(codec->bus->workq, &codec->jackpoll_work,
codec->jackpoll_interval);
}