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drm: Add dev->vblank_disable_immediate flag

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Add a flag to drm_device which will cause the vblank code to bypass the
disable timer and always disable the vblank interrupt immediately when
the last reference is dropped.

v2: Add some notes about the flag to the kernel doc

Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Ville Syrjälä 2014-08-06 14:49:54 +03:00 • committed by Daniel Vetter
parent 4ed0ce3d0b
commit 00185e6670
3 changed files with 17 additions and 1 deletions
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2
drivers/gpu/drm/drm_irq.c
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@ -994,7 +994,7 @@ void drm_vblank_put(struct drm_device *dev, int crtc)
/* Last user schedules interrupt disable */
if (atomic_dec_and_test(&vblank->refcount)) {
if (drm_vblank_offdelay < 0)
if (dev->vblank_disable_immediate || drm_vblank_offdelay < 0)
vblank_disable_fn((unsigned long)vblank);
else if (drm_vblank_offdelay > 0)
mod_timer(&vblank->disable_timer,