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ALSA: hda - power setting error check 

codec may reject power state transition requests(reporting PS-ERROR set),
in that case we re-issue a power state setting and check error bit again.

Signed-off-by: Wang Xingchao <xingchao.wang@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Wang Xingchao 2012-06-08 10:26:08 +08:00 committed by Takashi Iwai
parent e076eb5c95
commit 09617ce477
1 changed files with 14 additions and 3 deletions
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17
sound/pci/hda/hda_codec.c
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@ -3526,6 +3526,9 @@ static bool snd_hda_codec_get_supported_ps(struct hda_codec *codec, hda_nid_t fg
static void hda_set_power_state(struct hda_codec *codec, hda_nid_t fg,
unsigned int power_state)
{
int count;
unsigned int state;
if (codec->patch_ops.set_power_state) {
codec->patch_ops.set_power_state(codec, fg, power_state);
return;
@ -3537,9 +3540,17 @@ static void hda_set_power_state(struct hda_codec *codec, hda_nid_t fg,
bool epss = snd_hda_codec_get_supported_ps(codec, fg, AC_PWRST_EPSS);
msleep(epss ? 10 : 100);
}
snd_hda_codec_read(codec, fg, 0, AC_VERB_SET_POWER_STATE,
power_state);
snd_hda_codec_set_power_to_all(codec, fg, power_state, true);
/* repeat power states setting at most 10 times*/
for (count = 0; count < 10; count++) {
snd_hda_codec_read(codec, fg, 0, AC_VERB_SET_POWER_STATE,
power_state);
snd_hda_codec_set_power_to_all(codec, fg, power_state, true);
state = snd_hda_codec_read(codec, fg, 0,
AC_VERB_GET_POWER_STATE, 0);
if (!(state & AC_PWRST_ERROR))
break;
}
}
#ifdef CONFIG_SND_HDA_HWDEP