diff options
author | Takashi Iwai <tiwai@suse.de> | 2010-07-05 14:50:13 (GMT) |
---|---|---|
committer | Takashi Iwai <tiwai@suse.de> | 2010-07-09 06:42:29 (GMT) |
commit | ac0547dc62e67a3e0b0c1628b6e49efba8f517db (patch) | |
tree | dafd1c8283cc09c3eda5d8fc2a1d06ffeb0141c8 /sound/pci/hda | |
parent | f189efcd1cc06b75fe18642c9751d26aa5ed2b54 (diff) | |
download | linux-fsl-qoriq-ac0547dc62e67a3e0b0c1628b6e49efba8f517db.tar.xz |
ALSA: hda - Restore cleared pin controls on resume
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>
Diffstat (limited to 'sound/pci/hda')
-rw-r--r-- | sound/pci/hda/hda_codec.c | 27 | ||||
-rw-r--r-- | sound/pci/hda/hda_codec.h | 5 |
2 files changed, 31 insertions, 1 deletions
diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c index a3d638c..ba2098d 100644 --- a/sound/pci/hda/hda_codec.c +++ b/sound/pci/hda/hda_codec.c @@ -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); diff --git a/sound/pci/hda/hda_codec.h b/sound/pci/hda/hda_codec.h index 49e939e..5991d14 100644 --- a/sound/pci/hda/hda_codec.h +++ b/sound/pci/hda/hda_codec.h @@ -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); |