• Tzung-Bi Shih's avatar
    ASoC: dapm: Recalculate audio map forcely when card instantiated · 4c4ab8d5
    Tzung-Bi Shih authored
    [ Upstream commit 882eab6c28d23a970ae73b7eb831b169a672d456 ]
    
    Audio map are possible in wrong state before card->instantiated has
    been set to true.  Imaging the following examples:
    
    time 1: at the beginning
    
      in:-1    in:-1    in:-1    in:-1
     out:-1   out:-1   out:-1   out:-1
     SIGGEN        A        B      Spk
    
    time 2: after someone called snd_soc_dapm_new_widgets()
    (e.g. create_fill_widget_route_map() in sound/soc/codecs/hdac_hdmi.c)
    
       in:1     in:0     in:0     in:0
      out:0    out:0    out:0    out:1
     SIGGEN        A        B      Spk
    
    time 3: routes added
    
       in:1     in:0     in:0     in:0
      out:0    out:0    out:0    out:1
     SIGGEN -----> A -----> B ---> Spk
    
    In the end, the path should be powered on but it did not.  At time 3,
    "in" of SIGGEN and "out" of Spk did not propagate to their neighbors
    because snd_soc_dapm_add_path() will not invalidate the paths if
    the card has not instantiated (i.e. card->instantiated is false).
    To correct the state of audio map, recalculate the whole map forcely.
    Signed-off-by: default avatarTzung-Bi Shih <tzungbi@google.com>
    Signed-off-by: default avatarMark Brown <broonie@kernel.org>
    Signed-off-by: default avatarSasha Levin <sashal@kernel.org>
    4c4ab8d5
soc-core.c 99.2 KB