• Oswald Buddenhagen's avatar
    ALSA: emu10k1: fix E-MU dock initialization · e8289fd3
    Oswald Buddenhagen authored
    A side effect of making the dock monitoring interrupt-driven was that
    we'd be very quick to program a freshly connected dock. However, for
    unclear reasons, the dock does not work when we do that - despite the
    FPGA netlist upload going just fine. We work around this by adding a
    delay before programming the dock; for safety, the value is several
    times as much as was determined empirically.
    
    Note that a badly timed dock hot-plug would have triggered the problem
    even before the referenced commit - but now it would happen 100% instead
    of about 3% of the time, thus making it impossible to work around by
    re-plugging.
    
    Fixes: fbb64eed ("ALSA: emu10k1: make E-MU dock monitoring interrupt-driven")
    Link: https://bugzilla.kernel.org/show_bug.cgi?id=218584
    
    Signed-off-by: default avatarOswald Buddenhagen <oswald.buddenhagen@gmx.de>
    Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
    Message-ID: <20240428093716.3198666-6-oswald.buddenhagen@gmx.de>
    e8289fd3
emu10k1_main.c 55.7 KB