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ALSA: hda - Restore cleared pin controls on resume

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Many codecs now clear the pin controls at suspend via snd_hda_shutup_pins()
for reducing the click noise at power-off.  But this leaves some pins
uninitialized, and they'll be never recovered after resume.

This patch adds the proper recovery of cleared pin controls on resume.
Also it adds a check of bus->shutdown so that pins won't be cleared at
module unloading.

Reference: Kernel bug 16339
	http://bugzilla.kernel.org/show_bug.cgi?id=16339

Cc: <stable@kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2010-07-05 16:50:13 +02:00
parent f189efcd1c
commit ac0547dc62
2 changed files with 31 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

27
sound/pci/hda/hda_codec.c
View File

@ -784,6 +784,9 @@ static int read_pin_defaults(struct hda_codec *codec)
pin->nid = nid;
pin->cfg = snd_hda_codec_read(codec, nid, 0,
AC_VERB_GET_CONFIG_DEFAULT, 0);
pin->ctrl = snd_hda_codec_read(codec, nid, 0,
AC_VERB_GET_PIN_WIDGET_CONTROL,
0);
}
return 0;
}
@ -912,15 +915,38 @@ static void restore_pincfgs(struct hda_codec *codec)
void snd_hda_shutup_pins(struct hda_codec *codec)
{
int i;
/* don't shut up pins when unloading the driver; otherwise it breaks
* the default pin setup at the next load of the driver
*/
if (codec->bus->shutdown)
return;
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);
}
codec->pins_shutup = 1;
}
EXPORT_SYMBOL_HDA(snd_hda_shutup_pins);
/* Restore the pin controls cleared previously via snd_hda_shutup_pins() */
static void restore_shutup_pins(struct hda_codec *codec)
{
int i;
if (!codec->pins_shutup)
return;
if (codec->bus->shutdown)
return;
for (i = 0; i < codec->init_pins.used; i++) {
struct hda_pincfg *pin = snd_array_elem(&codec->init_pins, i);
snd_hda_codec_write(codec, pin->nid, 0,
AC_VERB_SET_PIN_WIDGET_CONTROL,
pin->ctrl);
}
codec->pins_shutup = 0;
}
static void init_hda_cache(struct hda_cache_rec *cache,
unsigned int record_size);
static void free_hda_cache(struct hda_cache_rec *cache);
@ -2907,6 +2933,7 @@ static void hda_call_codec_resume(struct hda_codec *codec)
codec->afg ? codec->afg : codec->mfg,
AC_PWRST_D0);
restore_pincfgs(codec); /* restore all current pin configs */
restore_shutup_pins(codec);
hda_exec_init_verbs(codec);
if (codec->patch_ops.resume)
codec->patch_ops.resume(codec);

5
sound/pci/hda/hda_codec.h
View File

@ -821,6 +821,7 @@ struct hda_codec {
unsigned int pin_amp_workaround:1; /* pin out-amp takes index
* (e.g. Conexant codecs)
*/
unsigned int pins_shutup:1; /* pins are shut up */
unsigned int no_trigger_sense:1; /* don't trigger at pin-sensing */
#ifdef CONFIG_SND_HDA_POWER_SAVE
unsigned int power_on :1; /* current (global) power-state */
@ -897,7 +898,9 @@ void snd_hda_codec_resume_cache(struct hda_codec *codec);
/* the struct for codec->pin_configs */
struct hda_pincfg {
hda_nid_t nid;
unsigned int cfg;
unsigned char ctrl; /* current pin control value */
unsigned char pad; /* reserved */
unsigned int cfg; /* default configuration */
};
unsigned int snd_hda_codec_get_pincfg(struct hda_codec *codec, hda_nid_t nid);