Re: [Intel-gfx] [PATCH v5 22/35] drm/i915: Support for 'unflushed' ring idle

2016-02-23 Thread Jesse Barnes
On 02/18/2016 06:27 AM, john.c.harri...@intel.com wrote: > From: John Harrison > > When the seqno wraps around zero, the entire GPU is forced to be idle > for some reason (possibly only to work around issues with hardware > semaphores but no-one seems too sure!). This causes a problem if the > fo

[Intel-gfx] [PATCH v5 22/35] drm/i915: Support for 'unflushed' ring idle

2016-02-18 Thread John . C . Harrison
From: John Harrison When the seqno wraps around zero, the entire GPU is forced to be idle for some reason (possibly only to work around issues with hardware semaphores but no-one seems too sure!). This causes a problem if the force idle occurs at an inopportune moment such as in the middle of sub