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ALSA: hda: fix mute led polarity for HP laptops with buggy BIOS

Some HP laptop models do not have a properly filled OEM string used
to set the gpio and polarity of the mute led. Make the mute led
configuration work for this case.

Signed-off-by: Gustavo Maciel Dias Vieira <>
Signed-off-by: Takashi Iwai <>
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commit e2ef36c688d5844a986424c3194bd33212c968ce 1 parent 1c89fe3
Gustavo Maciel Dias Vieira authored tiwai committed
Showing with 6 additions and 0 deletions.
  1. +6 −0 sound/pci/hda/patch_sigmatel.c
6 sound/pci/hda/patch_sigmatel.c
@@ -4929,6 +4929,12 @@ static int find_mute_led_gpio(struct hda_codec *codec, int default_polarity)
return 1;
+ /* BIOS bug: unfilled OEM string */
+ if (strstr(dev->name, "HP_Mute_LED_P_G")) {
+ set_hp_led_gpio(codec);
+ spec->gpio_led_polarity = 1;
+ return 1;
+ }
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