Re: [PATCH 05/26] drm/i915: extract fbc_on_pipe_a_only()

["Zanoni, Paulo R" <paulo.r.zanoni@intel.com>]

Em Qui, 2015-10-29 às 13:05 +0100, Maarten Lankhorst escreveu:
> Op 27-10-15 om 17:50 schreef Paulo Zanoni:
> > Make the code easier to read.
> > 
> > Suggested-by: Chris Wilson <chris@chris-wilson.co.uk>
> > Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
> > ---
> >  drivers/gpu/drm/i915/intel_fbc.c | 13 +++++++------
> >  1 file changed, 7 insertions(+), 6 deletions(-)
> > 
> > diff --git a/drivers/gpu/drm/i915/intel_fbc.c
> > b/drivers/gpu/drm/i915/intel_fbc.c
> > index 7d8e996..4d6ebc7 100644
> > --- a/drivers/gpu/drm/i915/intel_fbc.c
> > +++ b/drivers/gpu/drm/i915/intel_fbc.c
> > @@ -46,6 +46,11 @@ static inline bool fbc_supported(struct
> > drm_i915_private *dev_priv)
> >  	return dev_priv->fbc.enable_fbc != NULL;
> >  }
> >  
> > +static inline bool fbc_on_pipe_a_only(struct drm_i915_private
> > *dev_priv)
> > +{
> > +	return IS_HASWELL(dev_priv) || INTEL_INFO(dev_priv)->gen
> > >= 8;
> > +}
> This check is duplicated in __intel_fbc_update, which also seems to
> say < gen4 doesn't support it but that's not mentioned here.
> 
> I would say use possible_framebuffer_bits and remove this extra check
> here in the future.


Pipes != planes on gen < 4. I think your suggestion is related to patch
21/26

> 
> I'll probably rework this later though, so this is fine with me for
> now.
> >  /*
> >   * In some platforms where the CRTC's x:0/y:0 coordinates doesn't
> > match the
> >   * frontbuffer's x:0/y:0 coordinates we lie to the hardware about
> > the plane's
> > @@ -543,10 +548,6 @@ static struct drm_crtc
> > *intel_fbc_find_crtc(struct drm_i915_private *dev_priv)
> >  {
> >  	struct drm_crtc *crtc = NULL, *tmp_crtc;
> >  	enum pipe pipe;
> > -	bool pipe_a_only = false;
> > -
> > -	if (IS_HASWELL(dev_priv) || INTEL_INFO(dev_priv)->gen >=
> > 8)
> > -		pipe_a_only = true;
> >  
> >  	for_each_pipe(dev_priv, pipe) {
> >  		tmp_crtc = dev_priv->pipe_to_crtc_mapping[pipe];
> > @@ -555,7 +556,7 @@ static struct drm_crtc
> > *intel_fbc_find_crtc(struct drm_i915_private *dev_priv)
> >  		    to_intel_plane_state(tmp_crtc->primary-
> > >state)->visible)
> >  			crtc = tmp_crtc;
> >  
> > -		if (pipe_a_only)
> > +		if (fbc_on_pipe_a_only(dev_priv))
> >  			break;
> >  	}
> >  
> > @@ -1146,7 +1147,7 @@ void intel_fbc_init(struct drm_i915_private
> > *dev_priv)
> >  		dev_priv->fbc.possible_framebuffer_bits |=
> >  				INTEL_FRONTBUFFER_PRIMARY(pipe);
> >  
> > -		if (IS_HASWELL(dev_priv) || INTEL_INFO(dev_priv)-
> > >gen >= 8)
> > +		if (fbc_on_pipe_a_only(dev_priv))
> >  			break;
> >  	}
> >  
> 
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