Re: [PATCH 03/10] drm/i915: Use the atomic state in intel_update_primary_planes.

From: Daniel Vetter <daniel@ffwll.ch>
To: "Ville Syrjälä" <ville.syrjala@linux.intel.com>
Cc: intel-gfx@lists.freedesktop.org
Subject: Re: [PATCH 03/10] drm/i915: Use the atomic state in intel_update_primary_planes.
Date: Mon, 14 Sep 2015 11:02:41 +0200	[thread overview]
Message-ID: <20150914090241.GP3383@phenom.ffwll.local> (raw)
In-Reply-To: <20150910163405.GQ29811@intel.com>

On Thu, Sep 10, 2015 at 07:34:05PM +0300, Ville Syrjälä wrote:
> On Thu, Sep 10, 2015 at 06:31:02PM +0200, Daniel Vetter wrote:
> > On Thu, Sep 10, 2015 at 06:43:26PM +0300, Ville Syrjälä wrote:
> > > On Thu, Sep 10, 2015 at 04:07:58PM +0200, Maarten Lankhorst wrote:
> > > > This function was still using the legacy state, convert it to atomic.
> > > > While we're at it, fix the FIXME too and disable the primary plane.
> > > > 
> > > > Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
> > > > ---
> > > >  drivers/gpu/drm/i915/intel_display.c | 26 ++++++++++++--------------
> > > >  1 file changed, 12 insertions(+), 14 deletions(-)
> > > > 
> > > > diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
> > > > index 33200403a5db..b68aa95c5460 100644
> > > > --- a/drivers/gpu/drm/i915/intel_display.c
> > > > +++ b/drivers/gpu/drm/i915/intel_display.c
> > > > @@ -3138,24 +3138,22 @@ static void intel_complete_page_flips(struct drm_device *dev)
> > > >  
> > > >  static void intel_update_primary_planes(struct drm_device *dev)
> > > >  {
> > > > -	struct drm_i915_private *dev_priv = dev->dev_private;
> > > >  	struct drm_crtc *crtc;
> > > >  
> > > >  	for_each_crtc(dev, crtc) {
> > > > -		struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
> > > > +		struct intel_plane *plane = to_intel_plane(crtc->primary);
> > > > +		struct intel_plane_state *plane_state;
> > > >  
> > > > -		drm_modeset_lock(&crtc->mutex, NULL);
> > > > -		/*
> > > > -		 * FIXME: Once we have proper support for primary planes (and
> > > > -		 * disabling them without disabling the entire crtc) allow again
> > > > -		 * a NULL crtc->primary->fb.
> > > > -		 */
> > > > -		if (intel_crtc->active && crtc->primary->fb)
> > > > -			dev_priv->display.update_primary_plane(crtc,
> > > > -							       crtc->primary->fb,
> > > > -							       crtc->x,
> > > > -							       crtc->y);
> > > > -		drm_modeset_unlock(&crtc->mutex);
> > > > +		drm_modeset_lock_crtc(crtc, &plane->base);
> > > > +
> > > > +		plane_state = to_intel_plane_state(plane->base.state);
> > > > +
> > > > +		if (plane_state->base.fb)
> > > > +			plane->commit_plane(&plane->base, plane_state);
> > > > +		else if (crtc->state->active)
> > > > +			plane->disable_plane(&plane->base, crtc);
> > > 
> > > That doesn't make sense. There's no way to disable a plane with a page
> > > flip, so there's simply nothing to do here if the fb is NULL. If we can
> > > trust the plane state to be sane we should just check 'visible' here and
> > > commit the plane in that case.
> > 
> > Right missed that and squash up a fixup that Ville acked on irc. Also
> > added the FIXME comment too.
> 
> Actually I take it back. We just lost the ->active check entirely so now
> we're commiting a plane on a disabled pipe potentially.

Blergh and I tagged the pile already :( Maarten, can you pls send out the
fixup as a separate patch asap?

Thanks, Daniel
-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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