Re: [PATCH v2 09/11] drm/atomic: Pass the full state to planes atomic disable and update

Hi Maxime,

Thank you for the patch.

On Thu, Jan 21, 2021 at 05:35:34PM +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 convert the remaining helpers to provide a consistent interface,
this time with the planes atomic_update and atomic_disable.

The conversion was done using the coccinelle script below, built tested on
all the drivers.

@@
identifier plane, plane_state;
symbol state;
@@

 struct drm_plane_helper_funcs {
 	...
	void (*atomic_update)(struct drm_plane *plane,
-			      struct drm_plane_state *plane_state);
+			      struct drm_atomic_state *state);
 	...
 }

@@
identifier plane, plane_state;
symbol state;
@@

 struct drm_plane_helper_funcs {
	...
	void (*atomic_disable)(struct drm_plane *plane,
-			       struct drm_plane_state *plane_state);
+			       struct drm_atomic_state *state);
	...
 }

@ plane_atomic_func @
identifier helpers;
identifier func;
@@

(
 static const struct drm_plane_helper_funcs helpers = {
 	...,
 	.atomic_update = func,
	...,
 };
|
 static const struct drm_plane_helper_funcs helpers = {
 	...,
 	.atomic_disable = func,
	...,
 };
)

@@
struct drm_plane_helper_funcs *FUNCS;
identifier f;
identifier crtc_state;
identifier plane, plane_state, state;
expression e;
@@

 f(struct drm_crtc_state *crtc_state)
 {
 	...
 	struct drm_atomic_state *state = e;
 	<+...
(
-	FUNCS->atomic_disable(plane, plane_state)
+	FUNCS->atomic_disable(plane, state)
|
-	FUNCS->atomic_update(plane, plane_state)
+	FUNCS->atomic_update(plane, state)
)
 	...+>
 }

@@
identifier plane_atomic_func.func;
identifier plane;
symbol state;
@@

 func(struct drm_plane *plane,
-    struct drm_plane_state *state)
+    struct drm_plane_state *old_plane_state)
 {
	<...
-	state
+	old_plane_state
	...>
 }

@ ignores_old_state @
identifier plane_atomic_func.func;
identifier plane, old_state;
@@

 func(struct drm_plane *plane, struct drm_plane_state *old_state)
 {
	... when != old_state
 }

@ adds_old_state depends on plane_atomic_func && !ignores_old_state @
identifier plane_atomic_func.func;
identifier plane, plane_state;
@@

 func(struct drm_plane *plane, struct drm_plane_state *plane_state)
 {
+	struct drm_plane_state *plane_state = drm_atomic_get_old_plane_state(state, plane);
 	...
 }

@ depends on plane_atomic_func @
identifier plane_atomic_func.func;
identifier plane, plane_state;
@@

 func(struct drm_plane *plane,
-     struct drm_plane_state *plane_state
+     struct drm_atomic_state *state
     )
 { ... }

@ include depends on adds_old_state @
@@

 #include <drm/drm_atomic.h>

@ no_include depends on !include && adds_old_state @
@@

+ #include <drm/drm_atomic.h>
  #include <drm/...>

@@
identifier plane_atomic_func.func;
identifier plane, state;
identifier plane_state;
@@

 func(struct drm_plane *plane, struct drm_atomic_state *state) {
 	...
 	struct drm_plane_state *plane_state = drm_atomic_get_old_plane_state(state, plane);
 	<+...
-	plane_state->state
+	state
 	...+>
 }

Signed-off-by: Maxime Ripard <redacted>

---

Changes from v1:
  - Reintroduce the old_plane_state check in zynqmp_disp_crtc_atomic_disable
---
 drivers/gpu/drm/drm_atomic_helper.c               |  8 ++++----
 drivers/gpu/drm/drm_simple_kms_helper.c           |  4 +++-
 drivers/gpu/drm/mxsfb/mxsfb_kms.c                 |  6 ++++--
 drivers/gpu/drm/omapdrm/omap_plane.c              |  4 ++--
 drivers/gpu/drm/rcar-du/rcar_du_plane.c           |  4 +++-
 drivers/gpu/drm/rcar-du/rcar_du_vsp.c             |  4 +++-
 drivers/gpu/drm/tidss/tidss_plane.c               |  4 ++--
 drivers/gpu/drm/tilcdc/tilcdc_plane.c             |  2 +-
 drivers/gpu/drm/xlnx/zynqmp_disp.c                | 15 ++++++++-------
 include/drm/drm_modeset_helper_vtables.h          |  4 ++--

For these,

Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

 58 files changed, 211 insertions(+), 123 deletions(-)

-- 
Regards,

Laurent Pinchart
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