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drm: Disable vblank interrupt immediately when drm_vblank_offdelay<0

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Make drm_vblank_put() disable the vblank interrupt immediately when the
refcount drops to zero and drm_vblank_offdelay<0.

v2: Preserve the current drm_vblank_offdelay==0 'never disable' behaviur

Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
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 14:49:53 +03:00 • committed by Daniel Vetter
parent ffe7c73a8d
commit 4ed0ce3d0b
4 changed files with 11 additions and 7 deletions
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11
drivers/gpu/drm/drm_irq.c
View file

@ -993,10 +993,13 @@ void drm_vblank_put(struct drm_device *dev, int crtc)
BUG_ON(atomic_read(&vblank->refcount) == 0);
/* Last user schedules interrupt disable */
if (atomic_dec_and_test(&vblank->refcount) &&
(drm_vblank_offdelay > 0))
mod_timer(&vblank->disable_timer,
jiffies + ((drm_vblank_offdelay * HZ)/1000));
if (atomic_dec_and_test(&vblank->refcount)) {
if (drm_vblank_offdelay < 0)
vblank_disable_fn((unsigned long)vblank);
else if (drm_vblank_offdelay > 0)
mod_timer(&vblank->disable_timer,
jiffies + ((drm_vblank_offdelay * HZ)/1000));
}
}
EXPORT_SYMBOL(drm_vblank_put);