• Takashi Iwai's avatar
    ALSA: pcm: Introduce protocol version field to sw_params · 58900810
    Takashi Iwai authored
    For controlling the new fields more strictly, add sw_params.proto
    field indicating the protocol version of the user-space.  User-space
    should fill the SNDRV_PCM_VERSION value it's built with, then kernel
    can know whether the new fields should be evaluated or not.
    
    And now tstamp_type field is evaluated only when the valid value is
    set there.  This avoids the wrong override of tstamp_type to zero,
    which is SNDRV_PCM_TSTAMP_TYPE_GETTIMEOFDAY.
    Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
    58900810
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