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ALSA: hda - allow a codec to define its own depop delay time 

This patch adds 'depop_delay' to struct hda_codec, to indicate a depop delay
time in ms when power-down, in function set_power_state() to D3.

Default value is -1, for a default delay time.
Machine fixup can set a suitable value according to the codec chip and HW audio
design.

Signed-off-by: Mengdong Lin <mengdong.lin@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Mengdong Lin 2013-11-29 01:48:45 -05:00 committed by Takashi Iwai
parent b5c6611fb4
commit 7f13292743
2 changed files with 7 additions and 2 deletions
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7
sound/pci/hda/hda_codec.c
View File

@ -1471,6 +1471,7 @@ int snd_hda_codec_new(struct hda_bus *bus,
INIT_LIST_HEAD(&codec->conn_list);
INIT_DELAYED_WORK(&codec->jackpoll_work, hda_jackpoll_work);
codec->depop_delay = -1;
#ifdef CONFIG_PM
spin_lock_init(&codec->power_lock);
@ -3975,8 +3976,10 @@ static unsigned int hda_set_power_state(struct hda_codec *codec,
/* this delay seems necessary to avoid click noise at power-down */
if (power_state == AC_PWRST_D3) {
/* transition time less than 10ms for power down */
msleep(codec->epss ? 10 : 100);
if (codec->depop_delay < 0)
msleep(codec->epss ? 10 : 100);
else if (codec->depop_delay > 0)
msleep(codec->depop_delay);
flags = HDA_RW_NO_RESPONSE_FALLBACK;
}

2
sound/pci/hda/hda_codec.h
View File

@ -944,6 +944,8 @@ struct hda_codec {
struct snd_array jacks;
#endif
int depop_delay; /* depop delay in ms, -1 for default delay time */
/* fix-up list */
int fixup_id;
const struct hda_fixup *fixup_list;