ALSA: dmaengine_pcm: Consider DMA cache caused delay in pointer callback

Browse source

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: Peter Ujfalusi <peter.ujfalusi@ti.com>
Reviewed-by: Takashi Iwai <tiwai@suse.de>
Link: https://lore.kernel.org/r/20200210151402.29634-1-peter.ujfalusi@ti.com
Signed-off-by: Mark Brown <broonie@kernel.org>

...

This commit is contained in:

Peter Ujfalusi 2020-02-10 17:14:02 +02:00 • committed by Mark Brown

parent 851fd87324

commit fa1f875c12

No known key found for this signature in database

GPG key ID: 24D68B725D5487D0

1 changed files with 5 additions and 0 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

5

sound/core/pcm_dmaengine.c

View file