Dne 29. 05. 20 v 14:28 Kai Vehmanen napsal(a):
Hello all,
here's patch to document -ENODATA error as a PCM error code.
We have recently merged patches to SOF firmware to use
this error code:
https://github.com/thesofproject/sof/pull/2918
Some additional background on the use-case:
https://github.com/thesofproject/sof/issues/2564
In thread "Functionality of pcm_notify in snd-aloop?"
https://mailman.alsa-project.org/pipermail/alsa-devel/2020-April/166974.html
.. we discussed the possibility for ALSA to provide a mechanism
for application to wait for the condition to change, but at least
for the currently known usages, the synchronization responsibility
will be in user-space (UCM file will describe the PCM dependencies).
Anyways, this is orthogonal to documenting -ENODATA, so sending
this now.
Kai Vehmanen (2):
pcm: add documentation for -ENODATA error code
pcm: fix spelling in documentation for -EBADFD
src/pcm/pcm.c | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
I applied those two patches, and added a short description that there is
no recovery mechanism and an event mechanism to notify the link availability
at the moment.
https://github.com/alsa-project/alsa-lib/commit/f3597737defe495f9c618b12507c9528c0ade1ee
Jaroslav
--
Jaroslav Kysela <perex@xxxxxxxx>
Linux Sound Maintainer; ALSA Project; Red Hat, Inc.
