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ALSA: hda - minor optimization in hda_set_power_state()

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Check the target power-state before checking EAPD exception to reduce
unneeded verb executions.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai
2009-04-21 13:37:29 +02:00
parent b97bedcded
commit a3b48c88f2
1 changed files with 3 additions and 2 deletions
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5
sound/pci/hda/hda_codec.c
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@@ -2348,7 +2348,8 @@ static void hda_set_power_state(struct hda_codec *codec, hda_nid_t fg,
if (wcaps & AC_WCAP_POWER) { if (wcaps & AC_WCAP_POWER) {
unsigned int wid_type = (wcaps & AC_WCAP_TYPE) >> unsigned int wid_type = (wcaps & AC_WCAP_TYPE) >>
AC_WCAP_TYPE_SHIFT; AC_WCAP_TYPE_SHIFT;
if (wid_type == AC_WID_PIN) { if (power_state == AC_PWRST_D3 &&
wid_type == AC_WID_PIN) {
unsigned int pincap; unsigned int pincap;
/* /*
* don't power down the widget if it controls * don't power down the widget if it controls
@@ -2360,7 +2361,7 @@ static void hda_set_power_state(struct hda_codec *codec, hda_nid_t fg,
nid, 0, nid, 0,
AC_VERB_GET_EAPD_BTLENABLE, 0); AC_VERB_GET_EAPD_BTLENABLE, 0);
eapd &= 0x02; eapd &= 0x02;
if (power_state == AC_PWRST_D3 && eapd) if (eapd)
continue; continue;
} }
} }