> As can be seen from the log, both the CORE and PER power domains > are not going to the suspend state. > > On further debug, I found that McBSP 2 instance belongs to the > PER domain whereas SDMA belongs to CORE domain. And at least > McBSP driver (on l-o tip) doesn't allow disabling of the clocks > unless McBSP instance itself is freed. Because of this, when > McBSP is stopped after receiving the suspend request, the > clocks are still ON and the PER domain is not allowed to enter > to the desired low-power state. > Yes, the McBSP clocks are enabled when the PCM substream is opened and released only when the pcm substream is closed. There are no .suspend/.resume callbacks in the mcbsp driver today. You need to save context of McBSP and disable clocks on suspend and enable clocks and restore context on resume. _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
