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ALSA: hda - Avoid to set the pin control again if already set 

Check the present pin control bit and avoid the write if it's already
set in patch_sigmatel.c.  This will reduce the number of verb execs at
jack plugging.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2009-01-22 16:59:20 +01:00
parent 1eaf5c0716
commit 8ce8419829
1 changed files with 13 additions and 7 deletions
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20
sound/pci/hda/patch_sigmatel.c
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@ -4126,7 +4126,9 @@ static void stac92xx_free(struct hda_codec *codec)
static void stac92xx_set_pinctl(struct hda_codec *codec, hda_nid_t nid,
unsigned int flag)
{
unsigned int pin_ctl = snd_hda_codec_read(codec, nid,
unsigned int old_ctl, pin_ctl;
pin_ctl = snd_hda_codec_read(codec, nid,
0, AC_VERB_GET_PIN_WIDGET_CONTROL, 0x00);
if (pin_ctl & AC_PINCTL_IN_EN) {
@ -4140,14 +4142,17 @@ static void stac92xx_set_pinctl(struct hda_codec *codec, hda_nid_t nid,
return;
}
old_ctl = pin_ctl;
/* if setting pin direction bits, clear the current
direction bits first */
if (flag & (AC_PINCTL_IN_EN | AC_PINCTL_OUT_EN))
pin_ctl &= ~(AC_PINCTL_IN_EN | AC_PINCTL_OUT_EN);
snd_hda_codec_write_cache(codec, nid, 0,
AC_VERB_SET_PIN_WIDGET_CONTROL,
pin_ctl | flag);
pin_ctl |= flag;
if (old_ctl != pin_ctl)
snd_hda_codec_write_cache(codec, nid, 0,
AC_VERB_SET_PIN_WIDGET_CONTROL,
pin_ctl);
}
static void stac92xx_reset_pinctl(struct hda_codec *codec, hda_nid_t nid,
@ -4155,9 +4160,10 @@ static void stac92xx_reset_pinctl(struct hda_codec *codec, hda_nid_t nid,
{
unsigned int pin_ctl = snd_hda_codec_read(codec, nid,
0, AC_VERB_GET_PIN_WIDGET_CONTROL, 0x00);
snd_hda_codec_write_cache(codec, nid, 0,
AC_VERB_SET_PIN_WIDGET_CONTROL,
pin_ctl & ~flag);
if (pin_ctl & flag)
snd_hda_codec_write_cache(codec, nid, 0,
AC_VERB_SET_PIN_WIDGET_CONTROL,
pin_ctl & ~flag);
}
static int get_pin_presence(struct hda_codec *codec, hda_nid_t nid)