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drm/i915: Disable high-precision vblank timestamping for UMS 

We only have sufficient information for accurate (sub-frame) timestamping
when the modesetting is under our control.

Reported-by: Chris Clayton <chris2553@googlemail.com>
Tested-by: Chris Clayton <chris2553@googlemail.com>
Reviewed-by: Mario Kleiner <mario.kleiner@tuebingen.mpg.de>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Chris Wilson 2011-01-23 10:45:14 +00:00
parent 4041b85323
commit 3885c6bbd0
1 changed files with 3 additions and 0 deletions
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3
drivers/gpu/drm/i915/i915_drv.c
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@ -752,6 +752,9 @@ static int __init i915_init(void)
driver.driver_features &= ~DRIVER_MODESET;
#endif
if (!(driver.driver_features & DRIVER_MODESET))
driver.get_vblank_timestamp = NULL;
return drm_init(&driver);
}