From: Maxime Ripard <maxime@cerno.tech>
To: "Ville Syrjälä" <ville.syrjala@linux.intel.com>
Cc: Neil Armstrong <narmstrong@baylibre.com>,
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Subject: Re: [PATCH v2 08/11] drm: Rename plane->state variables in atomic update and disable
Date: Mon, 25 Jan 2021 11:52:18 +0100 [thread overview]
Message-ID: <20210125105218.kv63vjbxz5b35hdo@gilmour> (raw)
In-Reply-To: <YArBy2DKdCct5cYW@intel.com>
[-- Attachment #1.1: Type: text/plain, Size: 2247 bytes --]
Hi Ville,
On Fri, Jan 22, 2021 at 02:15:07PM +0200, Ville Syrjälä wrote:
> On Thu, Jan 21, 2021 at 05:35:33PM +0100, Maxime Ripard wrote:
> > Some drivers are storing the plane->state pointer in atomic_update and
> > atomic_disable in a variable simply called state, while the state passed
> > as an argument is called old_state.
> >
> > In order to ease subsequent reworks and to avoid confusing or
> > inconsistent names, let's rename those variables to new_state.
> >
> > This was done using the following coccinelle script, plus some manual
> > changes for mtk and tegra.
> >
> > @ plane_atomic_func @
> > identifier helpers;
> > identifier func;
> > @@
> >
> > (
> > static const struct drm_plane_helper_funcs helpers = {
> > ...,
> > .atomic_disable = func,
> > ...,
> > };
> > |
> > static const struct drm_plane_helper_funcs helpers = {
> > ...,
> > .atomic_update = func,
> > ...,
> > };
> > )
> >
> > @ moves_new_state_old_state @
> > identifier plane_atomic_func.func;
> > identifier plane;
> > symbol old_state;
> > symbol state;
> > @@
> >
> > func(struct drm_plane *plane, struct drm_plane_state *old_state)
> > {
> > ...
> > - struct drm_plane_state *state = plane->state;
> > + struct drm_plane_state *new_state = plane->state;
> > ...
> > }
> >
> > @ depends on moves_new_state_old_state @
> > identifier plane_atomic_func.func;
> > identifier plane;
> > identifier old_state;
> > symbol state;
> > @@
> >
> > func(struct drm_plane *plane, struct drm_plane_state *old_state)
> > {
> > <...
> > - state
> > + new_state
> > ...>
>
> Was going to say that this migh eat something else, but I guess
> the dependency prevents that?
Yeah, the dependency takes care of this
> Another way to avoid that I suppose would be to declare 'state'
> as
> symbol moves_new_state_old_state.state;
>
> That would probably make the intent a bit more obvious, even with
> the dependency. Or does a dependency somehow automagically imply
> that?
I'm not sure if it does, but it's a symbol here not an identifier or an
expression, so here moves_new_state_old_state.state would always resolve
to state (and only state) anyway
Maxime
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next prev parent reply other threads:[~2021-01-26 8:38 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-21 16:35 [PATCH v2 01/11] drm/atomic: Pass the full state to planes async atomic check and update Maxime Ripard
2021-01-21 16:35 ` [PATCH v2 02/11] drm: Rename plane atomic_check state names Maxime Ripard
2021-01-21 16:35 ` [PATCH v2 03/11] drm/atmel-hlcdc: Rename custom plane state variable Maxime Ripard
2021-01-21 16:35 ` [PATCH v2 04/11] drm/atomic: Pass the full state to planes atomic_check Maxime Ripard
2021-01-21 16:35 ` [PATCH v2 05/11] drm: Use the state pointer directly in " Maxime Ripard
2021-01-21 16:35 ` [PATCH v2 06/11] drm: Use state helper instead of plane state pointer in atomic_check Maxime Ripard
2021-01-22 12:07 ` Ville Syrjälä
2021-01-25 9:07 ` Maxime Ripard
2021-01-21 16:35 ` [PATCH v2 07/11] drm: Store new plane state in a variable for atomic_update and disable Maxime Ripard
2021-01-21 16:35 ` [PATCH v2 08/11] drm: Rename plane->state variables in atomic update " Maxime Ripard
2021-01-22 12:15 ` Ville Syrjälä
2021-01-25 10:52 ` Maxime Ripard [this message]
2021-01-25 11:52 ` Ville Syrjälä
2021-01-21 16:35 ` [PATCH v2 09/11] drm/atomic: Pass the full state to planes atomic disable and update Maxime Ripard
2021-01-21 23:03 ` Laurent Pinchart
2021-01-21 16:35 ` [PATCH v2 10/11] drm: Use state helper instead of the plane state pointer Maxime Ripard
2021-01-26 13:24 ` Ville Syrjälä
2021-01-21 16:35 ` [PATCH v2 11/11] drm/todo: Remove the drm_atomic_state todo item Maxime Ripard
2021-01-21 18:27 ` Daniel Vetter
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