Commit 3885c6bb authored Jan 23, 2011 by Chris Wilson

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>

parent 4041b853

drivers/gpu/drm/i915/i915_drv.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -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);
		}