https://bugs.freedesktop.org/show_bug.cgi?id=84585
--- Comment #21 from Raymond <[email protected]> --- https://git.kernel.org/cgit/linux/kernel/git/tiwai/sound.git/tree/include/linux/dmaengine.h * @DMA_RESIDUE_GRANULARITY_SEGMENT: Residue is updated after each successfully * completed segment of the transfer (For cyclic transfers this is after each * period). This is typically implemented by having the hardware generate an * interrupt after each transferred segment and then the drivers updates the * outstanding residue by the size of the segment. Another possibility is if * the hardware supports scatter-gather and the segment descriptor has a field * which gets set after the segment has been completed. The driver then counts * the number of segments without the flag set to compute the residue. * @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, timer scheduling require at least two hardware feature DMA_RESIDUE_GRANULARITY_BURST and SNDRV_PCM_INFO_NO_PERIOD_WAKEUP https://git.kernel.org/cgit/linux/kernel/git/tiwai/sound.git/log/?qt=grep&q=period+wakeup -- You are receiving this mail because: You are the QA Contact for the bug. You are the assignee for the bug.
_______________________________________________ pulseaudio-bugs mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/pulseaudio-bugs
