commit 1c8b46fc8c865189f562c9ab163d63863759712f
Author: Chris Wilson <email address hidden>
Date: Wed Nov 14 09:15:14 2012 +0000
drm/i915: Use LRI to update the semaphore registers
The bspec was recently updated to remove the ability to update the
semaphore using the MI_SEMAPHORE_BOX command, the ability to wait upon
the semaphore value remained. Instead the advice is to update the
register using the MI_LOAD_REGISTER_IMM command. In cursory testing,
semaphores continue to function - the question is whether this fixes
some of the deadlocks where the semaphore registers contained stale
values?
hopefully addresses.
That patch is only available on drm-intel-next at the moment, which is available either at http://cgit.freedesktop.org/~danvet/drm-intel or available as drm-intel-experimental in the ubuntu kernel-ppa.
Looks that corresponds to the bug
commit 1c8b46fc8c86518 9f562c9ab163d63 863759712f
Author: Chris Wilson <email address hidden>
Date: Wed Nov 14 09:15:14 2012 +0000
drm/i915: Use LRI to update the semaphore registers
The bspec was recently updated to remove the ability to update the REGISTER_ IMM command. In cursory testing,
semaphore using the MI_SEMAPHORE_BOX command, the ability to wait upon
the semaphore value remained. Instead the advice is to update the
register using the MI_LOAD_
semaphores continue to function - the question is whether this fixes
some of the deadlocks where the semaphore registers contained stale
values?
hopefully addresses.
That patch is only available on drm-intel-next at the moment, which is available either at http:// cgit.freedeskto p.org/~ danvet/ drm-intel or available as drm-intel- experimental in the ubuntu kernel-ppa.