Re: [PATCH 4/7] drm/i915: Clean up intel_wm_need_update()

["Govindapillai, Vinod" <vinod.govindapillai@intel.com>]

On Sun, 2024-09-22 at 12:54 +0300, Govindapillai, Vinod wrote:
> On Mon, 2024-09-16 at 19:24 +0300, Ville Syrjala wrote:
> > From: Ville Syrjälä <ville.syrjala@linux.intel.com>
> > 
> > intel_wm_need_update() is a mess when it comes to variable
> > names and constness. The checks also keep alternating randomly
> > between 'old != cur' vs. 'cur != old'. Clean it all up.
> > 
> > Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
> > ---
> >  .../gpu/drm/i915/display/intel_atomic_plane.c | 20 +++++++++----------
> >  1 file changed, 10 insertions(+), 10 deletions(-)
> 
> Reviewed-by: Vinod Govindapillai <vinod.govindapillai@intel.com>

Just noticed that the next patch in this series nuke this intel_wm_need_update() and move to
i9xx_wm_need_update(). So wonder if we need this patch.

Anyway, already RB-ed.

BR
Vinod

> 
> > 
> > diff --git a/drivers/gpu/drm/i915/display/intel_atomic_plane.c
> > b/drivers/gpu/drm/i915/display/intel_atomic_plane.c
> > index b5bbcc773ec0..2aeb4cd5b5a1 100644
> > --- a/drivers/gpu/drm/i915/display/intel_atomic_plane.c
> > +++ b/drivers/gpu/drm/i915/display/intel_atomic_plane.c
> > @@ -393,22 +393,22 @@ void intel_plane_set_invisible(struct intel_crtc_state *crtc_state,
> >  }
> >  
> >  /* FIXME nuke when all wm code is atomic */
> > -static bool intel_wm_need_update(const struct intel_plane_state *cur,
> > -                                struct intel_plane_state *new)
> > +static bool intel_wm_need_update(const struct intel_plane_state *old_plane_state,
> > +                                const struct intel_plane_state *new_plane_state)
> >  {
> >         /* Update watermarks on tiling or size changes. */
> > -       if (new->uapi.visible != cur->uapi.visible)
> > +       if (old_plane_state->uapi.visible != new_plane_state->uapi.visible)
> >                 return true;
> >  
> > -       if (!cur->hw.fb || !new->hw.fb)
> > +       if (!old_plane_state->hw.fb || !new_plane_state->hw.fb)
> >                 return false;
> >  
> > -       if (cur->hw.fb->modifier != new->hw.fb->modifier ||
> > -           cur->hw.rotation != new->hw.rotation ||
> > -           drm_rect_width(&new->uapi.src) != drm_rect_width(&cur->uapi.src) ||
> > -           drm_rect_height(&new->uapi.src) != drm_rect_height(&cur->uapi.src) ||
> > -           drm_rect_width(&new->uapi.dst) != drm_rect_width(&cur->uapi.dst) ||
> > -           drm_rect_height(&new->uapi.dst) != drm_rect_height(&cur->uapi.dst))
> > +       if (old_plane_state->hw.fb->modifier != new_plane_state->hw.fb->modifier ||
> > +           old_plane_state->hw.rotation != new_plane_state->hw.rotation ||
> > +           drm_rect_width(&old_plane_state->uapi.src) != drm_rect_width(&new_plane_state-
> > > uapi.src) ||
> > +           drm_rect_height(&old_plane_state->uapi.src) != drm_rect_height(&new_plane_state-
> > > uapi.src) ||
> > +           drm_rect_width(&old_plane_state->uapi.dst) != drm_rect_width(&new_plane_state-
> > > uapi.dst) ||
> > +           drm_rect_height(&old_plane_state->uapi.dst) != drm_rect_height(&new_plane_state-
> > > uapi.dst))
> >                 return true;
> >  
> >         return false;
>