Re: [Intel-gfx] [PATCH] drm/i915: Don't do posting reads on getting forcewake

2015-01-31 Thread shuang . he
Tested-By: PRC QA PRTS (Patch Regression Test System Contact: shuang...@intel.com) Task id: 5675 -Summary- Platform Delta drm-intel-nightly Series Applied PNV -1 353/353

Re: [Intel-gfx] [PATCH] drm/i915: Don't do posting reads on getting forcewake

2015-01-30 Thread Daniel Vetter
On Wed, Jan 28, 2015 at 02:04:27PM +, Chris Wilson wrote: > On Wed, Jan 28, 2015 at 03:25:05PM +0200, Mika Kuoppala wrote: > > The checking for ack and also any subsequent mmio access > > will serialize with setting the forcewake bit. Drop the > > posting read as superfluous. > > > > Note that

Re: [Intel-gfx] [PATCH] drm/i915: Don't do posting reads on getting forcewake

2015-01-28 Thread Chris Wilson
On Wed, Jan 28, 2015 at 03:25:05PM +0200, Mika Kuoppala wrote: > The checking for ack and also any subsequent mmio access > will serialize with setting the forcewake bit. Drop the > posting read as superfluous. > > Note that in the put side we still want to keep the posting read > as it will ensur

[Intel-gfx] [PATCH] drm/i915: Don't do posting reads on getting forcewake

2015-01-28 Thread Mika Kuoppala
The checking for ack and also any subsequent mmio access will serialize with setting the forcewake bit. Drop the posting read as superfluous. Note that in the put side we still want to keep the posting read as it will ensure that the hw sees our forcewake release in a timely manner and doesn't kee