[Intel-gfx] [PATCH v3 1/2] drm/i915/bxt: work around HW coherency issue when accessing GPU seqno

By running igt/store_dword_loop_render on BXT we can hit a coherency problem where the seqno written at GPU command completion time is not seen by the CPU. This results in __i915_wait_request seeing the stale seqno and not completing the request (not considering the lost interrupt/GPU reset mechani

Re: [Intel-gfx] [PATCH v3 1/2] drm/i915/bxt: work around HW coherency issue when accessing GPU seqno

On Fri, Aug 14, 2015 at 06:35:27PM +0300, Imre Deak wrote: > By running igt/store_dword_loop_render on BXT we can hit a coherency > problem where the seqno written at GPU command completion time is not > seen by the CPU. This results in __i915_wait_request seeing the stale > seqno and not completin