[PATCH 9/9] drm/i915: Drop unpin stall in atomic_prepare_commit

[Daniel Vetter]

On Wed, Jul 19, 2017 at 04:01:03PM +0200, Maarten Lankhorst wrote:
> Op 19-07-17 om 14:55 schreef Daniel Vetter:
> > The core already does this in setup_commit(). With this we can also
> > remove the unpin_work_count since it's the last user.
> >
> > Cc: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>
> > Cc: Ville Syrjälä <ville.syrjala at linux.intel.com>
> > Signed-off-by: Daniel Vetter <daniel.vetter at ffwll.ch>
> > ---
> >  drivers/gpu/drm/i915/intel_display.c | 13 +------------
> >  drivers/gpu/drm/i915/intel_drv.h     |  2 --
> >  2 files changed, 1 insertion(+), 14 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
> > index e52a2adbaaa5..351208b7b1ad 100644
> > --- a/drivers/gpu/drm/i915/intel_display.c
> > +++ b/drivers/gpu/drm/i915/intel_display.c
> > @@ -11825,18 +11825,7 @@ static int intel_atomic_check(struct drm_device *dev,
> >  static int intel_atomic_prepare_commit(struct drm_device *dev,
> >  				       struct drm_atomic_state *state)
> >  {
> > -	struct drm_i915_private *dev_priv = to_i915(dev);
> > -	struct drm_crtc_state *crtc_state;
> > -	struct drm_crtc *crtc;
> > -	int i, ret;
> > -
> > -	for_each_new_crtc_in_state(state, crtc, crtc_state, i) {
> > -		if (state->legacy_cursor_update)
> > -			continue;
> > -
> > -		if (atomic_read(&to_intel_crtc(crtc)->unpin_work_count) >= 2)
> > -			flush_workqueue(dev_priv->wq);
> > -	}
> > +	int ret;
> >  
> >  	ret = mutex_lock_interruptible(&dev->struct_mutex);
> >  	if (ret)
> > diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
> > index 9cb7e781e863..96402c06e295 100644
> > --- a/drivers/gpu/drm/i915/intel_drv.h
> > +++ b/drivers/gpu/drm/i915/intel_drv.h
> > @@ -798,8 +798,6 @@ struct intel_crtc {
> >  	unsigned long long enabled_power_domains;
> >  	struct intel_overlay *overlay;
> >  
> > -	atomic_t unpin_work_count;
> > -
> >  	/* Display surface base address adjustement for pageflips. Note that on
> >  	 * gen4+ this only adjusts up to a tile, offsets within a tile are
> >  	 * handled in the hw itself (with the TILEOFF register). */
> 
> I like red diffs..
> 
> For patch 1, 4 (with updated commit message), 6-9:
> Reviewed-by: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>

Ok I merged patches 1&2, that take care of this for a lot of
users/systems, and the remaining stuff needs a notch more polish, and a
lot more testing anyway.
-Daniel
-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch