From ac0547dc62e67a3e0b0c1628b6e49efba8f517db Mon Sep 17 00:00:00 2001 From: Takashi Iwai Date: Mon, 5 Jul 2010 16:50:13 +0200 Subject: 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: Signed-off-by: Takashi Iwai --- sound/pci/hda/hda_codec.c | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) (limited to 'sound/pci/hda/hda_codec.c') 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); -- cgit v1.1