ALSA: dmaengine_pcm: Consider DMA cache caused delay in pointer callback
Some DMA engines can have big FIFOs which adds to the latency. The DMAengine framework can report the FIFO utilization in bytes. Use this information for the delay reporting. Signed-off-by: NPeter Ujfalusi <peter.ujfalusi@ti.com> Reviewed-by: NTakashi Iwai <tiwai@suse.de> Link: https://lore.kernel.org/r/20200210151402.29634-1-peter.ujfalusi@ti.comSigned-off-by: NMark Brown <broonie@kernel.org>
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