On Wed, Sep 10, 2014 at 05:36:08PM +0200, Daniel Vetter wrote:
> With the new support for immediate vblank disabling we always disabled
> the vblank interrupt right away, irrespective of the vblank offdelay
> setting.
>
> But being able to let vblanks run forever is fairly useful for
> debugging, so restore that behaviour.
>
> Suggested-by: Mario Kleiner <mario.kleiner.de@xxxxxxxxx>
> Cc: Mario Kleiner <mario.kleiner.de@xxxxxxxxx>
> Cc: Matt Roper <matthew.d.roper@xxxxxxxxx>
> Cc: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
> Signed-off-by: Daniel Vetter <daniel.vetter@xxxxxxxxx>
Reviewed-by: Matt Roper <matthew.d.roper@xxxxxxxxx>
> ---
> drivers/gpu/drm/drm_irq.c | 6 ++++--
> 1 file changed, 4 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/drm_irq.c b/drivers/gpu/drm/drm_irq.c
> index a75da075927c..6eb015020af2 100644
> --- a/drivers/gpu/drm/drm_irq.c
> +++ b/drivers/gpu/drm/drm_irq.c
> @@ -1024,9 +1024,11 @@ void drm_vblank_put(struct drm_device *dev, int crtc)
>
> /* Last user schedules interrupt disable */
> if (atomic_dec_and_test(&vblank->refcount)) {
> - if (dev->vblank_disable_immediate || drm_vblank_offdelay < 0)
> + if (drm_vblank_offdelay == 0)
> + return;
> + else if (dev->vblank_disable_immediate || drm_vblank_offdelay < 0)
> vblank_disable_fn((unsigned long)vblank);
> - else if (drm_vblank_offdelay > 0)
> + else
> mod_timer(&vblank->disable_timer,
> jiffies + ((drm_vblank_offdelay * HZ)/1000));
> }
> --
> 1.9.3
>
--
Matt Roper
Graphics Software Engineer
IoTG Platform Enabling & Development
Intel Corporation
(916) 356-2795
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