• Takashi Iwai's avatar
    ALSA: hda/realtek - Add shutup hint · c7273bd6
    Takashi Iwai authored
    The pin shutup callback seems working well on some devices while it
    does harm on some other devices; e.g. Lenovo laptops show often the
    noises at (runtime) PM with the pin shutup enabled.
    Currently, the only way to disable the pin shutup is to hard-code
      spec->shutup = alc_no_shutup;
    in the fixup, and this makes the debugging harder for normal users.
    For allowing users to test the similar effect without recompiling the
    kernel, this patch adds a new hint string "shutup".  It's a boolean
    value, and by passing false to this, user can turn off the pin shutup
    For example, to turn off the shutup on Lenovo P50, create a "firmware
    patch" file (e.g. /lib/firmware/alsa/lenovo-p50) containing the
    following lines:
      0x10ec0298 0x17aa222e 0
      shutup = no
    and pass the file via patch option of snd-hda-intel module
    (e.g. patch=alsa/lenovo-p50).
    Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>