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ALSA: hda - Add snd_hda_shutup_pins() helper function

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Add a common helper function for clearing pin controls before suspend.
Use the pincfg array instead of looking through all widget tree.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2009-12-27 11:18:59 +01:00
parent 043958e602
commit 92ee6162c4
3 changed files with 21 additions and 11 deletions
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19
sound/pci/hda/hda_codec.c
View File

@ -899,6 +899,25 @@ static void restore_pincfgs(struct hda_codec *codec)
}
}
/**
* snd_hda_shutup_pins - Shut up all pins
* @codec: the HDA codec
*
* Clear all pin controls to shup up before suspend for avoiding click noise.
* The controls aren't cached so that they can be resumed properly.
*/
void snd_hda_shutup_pins(struct hda_codec *codec)
{
int i;
for (i = 0; i < codec->init_pins.used; i++) {
struct hda_pincfg *pin = snd_array_elem(&codec->init_pins, i);
/* use read here for syncing after issuing each verb */
snd_hda_codec_read(codec, pin->nid, 0,
AC_VERB_SET_PIN_WIDGET_CONTROL, 0);
}
}
EXPORT_SYMBOL_HDA(snd_hda_shutup_pins);
static void init_hda_cache(struct hda_cache_rec *cache,
unsigned int record_size);
static void free_hda_cache(struct hda_cache_rec *cache);

1
sound/pci/hda/hda_codec.h
View File

@ -898,6 +898,7 @@ int snd_hda_codec_set_pincfg(struct hda_codec *codec, hda_nid_t nid,
unsigned int cfg);
int snd_hda_add_pincfg(struct hda_codec *codec, struct snd_array *list,
hda_nid_t nid, unsigned int cfg); /* for hwdep */
void snd_hda_shutup_pins(struct hda_codec *codec);
/*
* Mixer

12
sound/pci/hda/patch_sigmatel.c
View File

@ -4385,18 +4385,8 @@ static void stac92xx_free_kctls(struct hda_codec *codec)
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);
}
snd_hda_shutup_pins(codec);
if (spec->eapd_mask)
stac_gpio_set(codec, spec->gpio_mask,