[alsa-devel] [PATCH 4/8] Input: twl6040-vibra: Check the selected path for vibra

Péter Ujfalusi peter.ujfalusi at ti.com
Fri Sep 16 08:42:16 CEST 2011

On Thursday 15 September 2011 23:27:20 Dmitry Torokhov wrote:
> This is not very helpful for the application trying to use the device.
> Maybe we should zap the device when channels are routed through audio
> instead of dripping requests?

Yes, I have thought about that as well, but it can cause other problems.
I have modified the fftest tool from:
for my needs.
It opens the /dev/input/eventX, and it will keep it open as long as it is 
It is OK for me, since the twl6040-vibra goes to low power mode when we do not 
have effects running.
I can imagine, that real world application will do the same, and that might 
cause some problems, if I try to zap the device.
Can we zap a device, while it is open?
How application will handle that event?


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