Hi Mark, On Tue, Mar 10, 2020 at 12:45:44PM +0000, Mark Brown wrote: > On Mon, Mar 09, 2020 at 06:07:48PM +0100, Guennadi Liakhovetski wrote: > > > soc_dpcm_runtime_update() to activate an audio path and update audio > > routing. When streaming is stopped, the vhost driver calls > > soc_dpcm_runtime_update() and snd_soc_runtime_deactivate(). The latter > > doesn't work at the moment, because the DPCM doesn't recognise the > > path as inactive. We address this by adding a "mode" parameter to > > soc_dpcm_runtime_update(). If virtualisation isn't used, the current > > behaviour isn't affected. > > So why doesn't DPCM recognize that the path is inactive and why is it > better to do this than fix whatever the issue is there? Of course that would be better abd I'd much prefer that. Unfortunately I haven't been able to find a single scenario in which those paths would be exercised. As far as I understand path pruning should take place e.g. when a mixer modifies audio routing and as a result disables a certain pipeline, which is then pruned. If I could reproduce such a scenario I would be able to first check whether it's working, then see exactly how it is working and then see how best to add my use case to it. Since I wasn't able to find such a scenario, my only option was to preserve the current state and add my own path "on top." I'd be happy to try the other path too, I just need a use case, that I can reproduce. Thanks Guennadi
