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ALSA: hda - Avoid codec D3 for keeping mute LED up on Lenovo Yxx0

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The GPIO line used for the mute LED control on Lenovo Yxx0 laptops is
cleared unexpectedly when the codec goes to D3, typically by
power-saving.  For avoiding it, add a power filter in the fixup.

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=16373
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2014-01-13 16:18:25 +01:00
parent 20c8cd593a
commit bf68665d7a
1 changed files with 12 additions and 0 deletions
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12
sound/pci/hda/patch_realtek.c
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@ -4894,6 +4894,17 @@ static void alc662_led_gpio1_mute_hook(void *private_data, int enabled)
spec->gpio_led);
}
/* avoid D3 for keeping GPIO up */
static unsigned int gpio_led_power_filter(struct hda_codec *codec,
hda_nid_t nid,
unsigned int power_state)
{
struct alc_spec *spec = codec->spec;
if (nid == codec->afg && power_state == AC_PWRST_D3 && spec->gpio_led)
return AC_PWRST_D0;
return power_state;
}
static void alc662_fixup_led_gpio1(struct hda_codec *codec,
const struct hda_fixup *fix, int action)
{
@ -4908,6 +4919,7 @@ static void alc662_fixup_led_gpio1(struct hda_codec *codec,
spec->gen.vmaster_mute.hook = alc662_led_gpio1_mute_hook;
spec->gpio_led = 0;
snd_hda_add_verbs(codec, gpio_init);
codec->power_filter = gpio_led_power_filter;
}
}