[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 #12 from Raymond <superquad.vortex2 at gmail.com> ---
 1.215|   0.000) I: [pulseaudio] alsa-util.c: cannot disable ALSA period
wakeups
(   1.216|   0.000) D: [pulseaudio] alsa-util.c: Maximum hw buffer size is 2972
ms
(   1.217|   0.001) I: [pulseaudio] (alsa-lib)pcm_hw.c:
SNDRV_PCM_IOCTL_HW_PARAMS failed (-22)
(   1.219|   0.001) D: [pulseaudio] alsa-util.c: Set buffer size first (to
88200 samples), period size second (to 88200 samples).
(   1.220|   0.001) I: [pulseaudio] alsa-util.c: ALSA period wakeups were not
disabled
(   1.221|   0.000) I: [pulseaudio] alsa-sink.c: Successfully opened device
front:0.
(   1.221|   0.000) I: [pulseaudio] alsa-sink.c: Selected mapping 'Analog
Stereo' (analog-stereo).
(   1.222|   0.000) I: [pulseaudio] alsa-sink.c: Successfully enabled mmap()
mode.
(   1.222|   0.000) I: [pulseaudio] alsa-sink.c: Successfully enabled
timer-based scheduling mode.



can the sound card report dma residue? 

pulseaudio seem ignore 

1.217|   0.001) I: [pulseaudio] (alsa-lib)pcm_hw.c: SNDRV_PCM_IOCTL_HW_PARAMS
failed (-22)

seem enable timer scheduling when sound card cannot disable period wakeup?

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