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>
diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c
index fedbfae..851e6ec 100644
--- a/sound/pci/hda/hda_codec.c
+++ b/sound/pci/hda/hda_codec.c
@@ -3526,6 +3526,9 @@
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 @@
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