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ALSA: hda - Reset pins of IDT/STAC codecs at free

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Some laptops cause annoying clicks or noises at shutdown/reboot since
the speaker pin is set still high.  Apply the same procedure used for
the suspend to avoid such clicks/noises for freeing the codec, too.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2009-11-06 15:47:50 +01:00
parent 9ad6a46b64
commit 167eae5a17
1 changed files with 24 additions and 18 deletions
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42
sound/pci/hda/patch_sigmatel.c
View file

@ -4327,6 +4327,28 @@ static void stac92xx_free_kctls(struct hda_codec *codec)
snd_array_free(&spec->kctls);
}
static void stac92xx_shutup(struct hda_codec *codec)
{
struct sigmatel_spec *spec = codec->spec;
int i;
hda_nid_t nid;
/* reset each pin before powering down DAC/ADC to avoid click noise */
nid = codec->start_nid;
for (i = 0; i < codec->num_nodes; i++, nid++) {
unsigned int wcaps = get_wcaps(codec, nid);
unsigned int wid_type = get_wcaps_type(wcaps);
if (wid_type == AC_WID_PIN)
snd_hda_codec_read(codec, nid, 0,
AC_VERB_SET_PIN_WIDGET_CONTROL, 0);
}
if (spec->eapd_mask)
stac_gpio_set(codec, spec->gpio_mask,
spec->gpio_dir, spec->gpio_data &
~spec->eapd_mask);
}
static void stac92xx_free(struct hda_codec *codec)
{
struct sigmatel_spec *spec = codec->spec;
@ -4334,6 +4356,7 @@ static void stac92xx_free(struct hda_codec *codec)
if (! spec)
return;
stac92xx_shutup(codec);
stac92xx_free_jacks(codec);
snd_array_free(&spec->events);
@ -4793,24 +4816,7 @@ static int stac92xx_hp_check_power_status(struct hda_codec *codec,
static int stac92xx_suspend(struct hda_codec *codec, pm_message_t state)
{
struct sigmatel_spec *spec = codec->spec;
int i;
hda_nid_t nid;
/* reset each pin before powering down DAC/ADC to avoid click noise */
nid = codec->start_nid;
for (i = 0; i < codec->num_nodes; i++, nid++) {
unsigned int wcaps = get_wcaps(codec, nid);
unsigned int wid_type = get_wcaps_type(wcaps);
if (wid_type == AC_WID_PIN)
snd_hda_codec_read(codec, nid, 0,
AC_VERB_SET_PIN_WIDGET_CONTROL, 0);
}
if (spec->eapd_mask)
stac_gpio_set(codec, spec->gpio_mask,
spec->gpio_dir, spec->gpio_data &
~spec->eapd_mask);
stac92xx_shutup(codec);
return 0;
}
#endif