Implemented the bspec recommendation:
commit d247cb7d0cdb73736f31612157e47f166af68ba0
Author: Chris Wilson <ch...@chris-wilson.co.uk>
Date: Mon Dec 8 10:07:25 2014 +0000
sna/gen6: Poke PSMI control around WAIT_FOR_EVENT to prevent idling
The bspec recommends preventing the hardware from going to sleep around
a WAIT_FOR_EVENT, and tells us to use disable sleep bit in PSMI control
to accomplish this.
References: https://bugs.freedesktop.org/show_bug.cgi?id=62373
Signed-off-by: Chris Wilson <ch...@chris-wilson.co.uk>
It's worth another go...
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