Hi! Thanks for reviewing those patches
On Thu, Oct 29, 2020 at 03:50:41PM +0200, Ville Syrjälä wrote:
> On Wed, Oct 28, 2020 at 01:32:21PM +0100, Maxime Ripard wrote:
> > The current atomic helpers have either their object state being passed as
> > an argument or the full atomic state.
> >
> > The former is the pattern that was done at first, before switching to the
> > latter for new hooks or when it was needed.
> >
> > Let's start convert all the remaining helpers to provide a consistent
> > interface, starting with the CRTC's atomic_check.
> >
> > The conversion was done using the coccinelle script below,
> > built tested on all the drivers and actually tested on vc4.
> >
> > virtual report
>
> ?
>
> <snip>
> > @ depends on crtc_atomic_func @
> > identifier crtc_atomic_func.func;
> > expression E;
> > type T;
> > @@
> >
> > int func(...)
> > {
> > ...
> > - T state = E;
> > + T crtc_state = E;
> > <+...
> > - state
> > + crtc_state
> > ...+>
>
> > }
> >
> > @ depends on crtc_atomic_func @
> > identifier crtc_atomic_func.func;
> > type T;
> > @@
> >
> > int func(...)
> > {
> > ...
> > - T state;
> > + T crtc_state;
> > <+...
> > - state
> > + crtc_state
> > ...+>
> > }
>
> These two seem a bit fuzzy. AFAICS 'state' could be any
> kind of state given the constrainsts. Though I guess
> the fact that this is the crtc .atomic_check() it's most
> likely to either the crtc state or the whole atomic state.
>
> Not sure what would be the best way to tighten this up.
> Maybe a regex thing on the assignment? But I'm not sure
> you can even do that on an expression.
That would be a bit above my current coccinelle skills :)
I guess we could replace T by struct drm_crtc_state, that would catch
most cases like you pointed out, even though it's still not completely
accurate.
> Anyways, doesn't look like this went wrong anywhere, so
> seems good enough for a onetime job.
>
> <snip>
> > diff --git a/drivers/gpu/drm/mxsfb/mxsfb_kms.c
> > b/drivers/gpu/drm/mxsfb/mxsfb_kms.c
> > index 956f631997f2..b0757f84a979 100644
> > --- a/drivers/gpu/drm/mxsfb/mxsfb_kms.c
> > +++ b/drivers/gpu/drm/mxsfb/mxsfb_kms.c
> > @@ -269,17 +269,19 @@ static void mxsfb_crtc_mode_set_nofb(struct
> > mxsfb_drm_private *mxsfb)
> > }
> >
> > static int mxsfb_crtc_atomic_check(struct drm_crtc *crtc,
> > - struct drm_crtc_state *state)
> > + struct drm_atomic_state *state)
> > {
> > - bool has_primary = state->plane_mask &
> > + struct drm_crtc_state *crtc_state = drm_atomic_get_new_crtc_state(state,
> > + crtc);
> > + bool has_primary = crtc_state->plane_mask &
> > drm_plane_mask(crtc->primary);
> >
> > /* The primary plane has to be enabled when the CRTC is active. */
> > - if (state->active && !has_primary)
> > + if (crtc_state->active && !has_primary)
> > return -EINVAL;
> >
> > /* TODO: Is this needed ? */
> > - return drm_atomic_add_affected_planes(state->state, crtc);
> > + return drm_atomic_add_affected_planes(crtc_state->state, crtc);
>
> Could also s/crtc_state->state/state/ in various places.
>
> But that could done as a followup as well.
I'll send a subsequent patch for that one
> Didn't spot any mistakes:
> Reviewed-by: Ville Syrjälä <ville.syrj...@linux.intel.com>
Thanks!
Maxime
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