[pulseaudio-tickets] [Bug 84585] Issue of CPU usage with HiFiBerry driver snd_soc_hifiberry_amp with Debian Wheezy kernel 3.12.28

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=84585

--- Comment #16 from Raymond <superquad.vortex2 at gmail.com> ---
if your sound card cannot report dma residue, pcm pointer callback of your
driver return hwptr position which increment by one period in tne interrupt
handler

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