[alsa-devel] [PATCH v2 6/6] pcm: Update pcm->avail_min with needed_slave_avail_min, after reading unaligned frames

[Jaroslav Kysela]

Dne 16. 05. 19 v 19:26 Channaiah Vanitha (RBEI/ECF3) napsal(a):
> Hello  Takashi-san,
> 
>>  Can we avoid adding such a hack in the core code?
>>  Basically the issue is very specific to direct-plugins, so this sort of workaround should be implemented locally there instead.  I guess we can do similar tricks by overriding the calls in the callbacks.
> 
> Issue can be seen without direct plugins too with involvement of only hw which reports unaligned hw ptr. As I have explained in below  detailed description:
> "Also, this issue can be seen without dsnoop plugin, when HW reports unaligned hw_ptr For e.g. "

Which hardware exactly? The hw_ptr should be reset when the streaming starts.
It appears that the problem is specific to the direct plugins only when the
period wakeups are a bit different than for the direct hardware access.

						Jaroslav


-- 
Jaroslav Kysela <perex at perex.cz>
Linux Sound Maintainer; ALSA Project; Red Hat, Inc.