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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - tsched disabled when I use module-alsa-sink with 'mmap=0 tsched=1' parameters."
href="https://bugs.freedesktop.org/show_bug.cgi?id=87395#c11">Comment # 11</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - tsched disabled when I use module-alsa-sink with 'mmap=0 tsched=1' parameters."
href="https://bugs.freedesktop.org/show_bug.cgi?id=87395">bug 87395</a>
from <span class="vcard"><a class="email" href="mailto:superquad.vortex2@gmail.com" title="Raymond <superquad.vortex2@gmail.com>"> <span class="fn">Raymond</span></a>
</span></b>
<pre>timer scheduling is disabled when
<a href="http://cgit.freedesktop.org/pulseaudio/pulseaudio/commit/src/modules/alsa?id=826c8f69d34ef49e86fe0ab6c93c1ffba8916131">http://cgit.freedesktop.org/pulseaudio/pulseaudio/commit/src/modules/alsa?id=826c8f69d34ef49e86fe0ab6c93c1ffba8916131</a>
<a href="https://git.kernel.org/cgit/linux/kernel/git/tiwai/sound.git/commit/sound/soc/soc-generic-dmaengine-pcm.c?id=478028e088d6a94666d8a776be2cd2291faf3bbd">https://git.kernel.org/cgit/linux/kernel/git/tiwai/sound.git/commit/sound/soc/soc-generic-dmaengine-pcm.c?id=478028e088d6a94666d8a776be2cd2291faf3bbd</a>
<a href="https://git.kernel.org/cgit/linux/kernel/git/tiwai/sound.git/tree/include/linux/dmaengine.h">https://git.kernel.org/cgit/linux/kernel/git/tiwai/sound.git/tree/include/linux/dmaengine.h</a>
DMA_RESIDUE_GRANULARITY_BURST: Residue is updated after each transferred
* burst. This is typically only supported if the hardware has a progress
* register of some sort (E.g. a register with the current read/write address
* or a register with the amount of bursts/beats/bytes that have been
* transferred or still need to be transferred).
*/
enum dma_residue_granularity {
DMA_RESIDUE_GRANULARITY_DESCRIPTOR = 0,
DMA_RESIDUE_GRANULARITY_SEGMENT = 1,
DMA_RESIDUE_GRANULARITY_BURST = 2,
};</pre>
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