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drm: make sure vblank interrupts are disabled at DPMS time
When we call drm_vblank_off() at DPMS off time (to wake any clients so they don't hang) we need to make sure interrupts are actually disabled. If drm_vblank_off() gets called before the vblank usage timer expires, it'll prevent the timer from disabling interrupts since it also clears the vblank_enabled flag for the pipe. Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org> Signed-off-by: Dave Airlie <airlied@redhat.com>
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@ -475,6 +475,7 @@ void drm_vblank_off(struct drm_device *dev, int crtc)
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unsigned long irqflags;
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spin_lock_irqsave(&dev->vbl_lock, irqflags);
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dev->driver->disable_vblank(dev, crtc);
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DRM_WAKEUP(&dev->vbl_queue[crtc]);
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dev->vblank_enabled[crtc] = 0;
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dev->last_vblank[crtc] = dev->driver->get_vblank_counter(dev, crtc);
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