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>
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 @@
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 @@
/* 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);