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drm: make sure vblank interrupts are disabled at DPMS time

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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>
This commit is contained in:
Jesse Barnes 2010-03-26 18:07:15 +00:00 committed by Dave Airlie
parent c6f8505e46
commit e32ee7fa54
1 changed files with 1 additions and 0 deletions
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drivers/gpu/drm/drm_irq.c
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@ -475,6 +475,7 @@ void drm_vblank_off(struct drm_device *dev, int crtc)
unsigned long irqflags;
spin_lock_irqsave(&dev->vbl_lock, irqflags);
dev->driver->disable_vblank(dev, crtc);
DRM_WAKEUP(&dev->vbl_queue[crtc]);
dev->vblank_enabled[crtc] = 0;
dev->last_vblank[crtc] = dev->driver->get_vblank_counter(dev, crtc);