Re: [Intel-gfx] [PATCH v2] drm/i915: use hrtimer in wait for vblank

2014-03-25 Thread Daniel Vetter
On Tue, Mar 25, 2014 at 11:25:03AM +0530, Arun R Murthy wrote: > BZ: 178761 > > In wait for vblank use usleep_range, which will use hrtimers instead of > msleep. Using msleep(1~20) there are more chances of sleeping for 20ms. > Using usleep_range uses hrtimers and hence are precise, worst case wil

[Intel-gfx] [PATCH v2] drm/i915: use hrtimer in wait for vblank

2014-03-24 Thread Arun R Murthy
BZ: 178761 In wait for vblank use usleep_range, which will use hrtimers instead of msleep. Using msleep(1~20) there are more chances of sleeping for 20ms. Using usleep_range uses hrtimers and hence are precise, worst case will trigger an interrupt at the higher/max timeout. Change-log: On replaci