• Takashi Iwai's avatar
    ALSA: hda - Fix click noise at start on Dell XPS13 · 3e1b0c4a
    Takashi Iwai authored
    Dell XPS13 produces a click noise at boot up, and Gabriele spotted out
    that it's triggered by the initial pin control of the mic (NID 0x19).
    This has to be set to Hi-Z Vref while the driver initializes to Vref
    80% as a normal mic.
    
    This patch fixes the generic parser code not to override the target
    vref if it has been already set by the driver, and adds a proper
    initialization of the target vref for this pin in the Realtek driver
    side.
    Reported-and-tested-by: default avatarGabriele Mazzotta <gabriele.mzt@gmail.com>
    Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
    3e1b0c4a
hda_generic.c 157 KB