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drm/i915: Can't do accurate vblank timestamps with UMS 

Disable this feature when KMS is not running by setting the
driver->get_vblank_timestamp function pointer to NULL.

Signed-off-by: Keith Packard <keithp@keithp.com>
Tested-by: Justin P. Mattock <justinmattock@gmail.com>
This commit is contained in:
Keith Packard 2011-08-12 17:05:54 -07:00
parent aaa6fd2a00
commit c3613de92e
1 changed files with 4 additions and 2 deletions
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6
drivers/gpu/drm/i915/i915_irq.c
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@ -2058,8 +2058,10 @@ void intel_irq_init(struct drm_device *dev)
dev->driver->get_vblank_counter = gm45_get_vblank_counter;
}
dev->driver->get_vblank_timestamp = i915_get_vblank_timestamp;
if (drm_core_check_feature(dev, DRIVER_MODESET))
dev->driver->get_vblank_timestamp = i915_get_vblank_timestamp;
else
dev->driver->get_vblank_timestamp = NULL;
dev->driver->get_scanout_position = i915_get_crtc_scanoutpos;
if (IS_IVYBRIDGE(dev)) {