On Wed, Oct 21, 2015 at 05:16:04PM +0000, Zanoni, Paulo R wrote:
> Em Ter, 2015-10-20 às 16:52 +0100, Chris Wilson escreveu:
> > On Tue, Oct 20, 2015 at 11:49:50AM -0200, Paulo Zanoni wrote:
> > > We're going to kill intel_fbc_find_crtc(), that's why a big part of
> > > the logic moved from intel_fbc_find_crtc() to crtc_is_valid().
> > >
> > > Signed-off-by: Paulo Zanoni <paulo.r.zanoni@xxxxxxxxx>
> > > ---
> > > drivers/gpu/drm/i915/intel_fbc.c | 26 ++++++++++++++++----------
> > > 1 file changed, 16 insertions(+), 10 deletions(-)
> > >
> > > diff --git a/drivers/gpu/drm/i915/intel_fbc.c
> > > b/drivers/gpu/drm/i915/intel_fbc.c
> > > index b9cfd16..1162787 100644
> > > --- a/drivers/gpu/drm/i915/intel_fbc.c
> > > +++ b/drivers/gpu/drm/i915/intel_fbc.c
> > > @@ -538,27 +538,33 @@ static void set_no_fbc_reason(struct
> > > drm_i915_private *dev_priv,
> > > DRM_DEBUG_KMS("Disabling FBC: %s\n", reason);
> > > }
> > >
> > > +static bool crtc_is_valid(struct intel_crtc *crtc)
> > > +{
> > > + struct drm_i915_private *dev_priv = crtc->base.dev-
> > > >dev_private;
> > > + enum pipe pipe = crtc->pipe;
> > > +
> > > + if ((IS_HASWELL(dev_priv) || INTEL_INFO(dev_priv)->gen >=
> > > 8) &&
> > > + pipe != PIPE_A)
> >
> > Keeping
> >
> > if (pipe_a_only(dev_priv) && pipe != PIPE_A)
> > return false;
> >
> > would have been nicer.
>
> I can do that on v2.
>
> >
> > > + return false;
> > > +
> > > + return intel_crtc_active(&crtc->base) &&
> > > + to_intel_plane_state(crtc->base.primary->state)-
> > > >visible &&
> > > + crtc->base.primary->fb != NULL;
> >
> > And then you can split this line up for a little more clarity. If you
> > are taking the time to refactor into a separate function for
> > readability, you may as well apply a little polish as well.
>
> I really don't get what you're suggesting here. Can you please clarify?
I think multiline conditionals do not add to readibilty. Since you have
already taken the effort to split the predicate out into its own
function,
if (!intel_crtc_active(&crtc->base))
return false;
if (!to_intel_plane_state(crtc->base.primary->state)->visible)
return false;
/* both of these are used repeatedly in intel_display.c, probably worth
* refactoring into intel_plane_active(crtc, crtc->base.primary); later
* on
*/
/* given the two above, this is redundant. more evidence that we should
* not be writing this code ourselves but calling an intel_display
* helper
*/
if (crtc->base.primary->fb)
return false;
return true;
-Chris
--
Chris Wilson, Intel Open Source Technology Centre
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