ASoC: soc-generic-dmaengine: Handle DMA channel request failures correctly

Browse source

Currently any dma_request_chan() failure other than -EPROBE_DEFER is
silently ignored, since a missing channel is expected for devices that
only support one DMA direction.

Improve the handling of these failures by:
- reporting failures when a configured DMA channel cannot be requested;
- failing probe if neither playback nor capture obtains a DMA channel,
  since the PCM device would be unusable.

Devices that legitimately support only one DMA direction continue to
work as before.

Signed-off-by: bui duc phuc <phucduc.bui@gmail.com>
Link: https://patch.msgid.link/20260720064131.75156-1-phucduc.bui@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>

...

This commit is contained in:

bui duc phuc 2026-07-20 13:41:31 +07:00 • committed by Mark Brown

parent 14cdac7638

commit 9167f26047

No known key found for this signature in database

GPG key ID: 24D68B725D5487D0

1 changed files with 28 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

28

sound/soc/soc-generic-dmaengine-pcm.c

View file