ASoC: SOF: ipc4-pcm: Enable delay reporting for ChainDMA streams

Browse source

All streams (currently) which is configured to use ChainDMA can only work
on Link/host DMA pairs where the link side position can be access via host
registers (like HDA on CAVS 2.5 platforms).

Since the firmware does not provide time_info for ChainDMA, unlike for HDA
stream, the kernel should calculate the start and end offsets that is
needed for the delay calculation.

With this small change we can report accurate delays when the stream is
configured to use ChainDMA.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Reviewed-by: Liam Girdwood <liam.r.girdwood@intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Link: https://patch.msgid.link/20250619102848.12389-1-peter.ujfalusi@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>

...

This commit is contained in:

Peter Ujfalusi 2025-06-19 13:28:48 +03:00 • committed by Mark Brown

parent ce4b269c26

commit a1d203d390

No known key found for this signature in database

GPG key ID: 24D68B725D5487D0

3 changed files with 49 additions and 7 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

49

sound/soc/sof/ipc4-pcm.c

View file

6

sound/soc/sof/ipc4-topology.c

View file

1

sound/soc/sof/ipc4-topology.h

View file