[Intel-gfx] [PATCH 13/15] drm/i915: Stop setting wraparound seqno on initialisation

Dave Gordon david.s.gordon at intel.com
Tue Dec 1 08:57:11 PST 2015

On 29/11/15 08:48, Chris Wilson wrote:
> We have testcases to ensure that seqno wraparound works fine, so we can
> forgo forcing everyone to encounter seqno wraparound during early
> uptime. seqno wraparound incurs a full GPU stall so not forcing it
> will eliminate one jitter from the early system.
> Advancing the global next_seqno after a GPU reset is equally pointless.
> Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>

The real bug is that seqno wraparound forces GPU idle, can we fix that 


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