drm: Remove references to removed transitional helpers

The transitional helpers were removed a long time ago, but some
references stuck. Remove them.

Fixes: 21ebe615c16994f3 ("drm: Remove transitional helpers")
Signed-off-by: Geert Uytterhoeven <[e-mail]>
Reviewed-by: Laurent Pinchart <[e-mail]>
Signed-off-by: Javier Martinez Canillas <[e-mail]>
Link: https://patchwork.freedesktop.org/patch/msgid/ad4a2[e-mail]

drivers/gpu/drm/drm_plane_helper.c

···
 /**
  * DOC: overview
  *
- * This helper library has two parts. The first part has support to implement
- * primary plane support on top of the normal CRTC configuration interface.
+ * This helper library contains helpers to implement primary plane support on
+ * top of the normal CRTC configuration interface.
  * Since the legacy &drm_mode_config_funcs.set_config interface ties the primary
  * plane together with the CRTC state this does not allow userspace to disable
  * the primary plane itself. The default primary plane only expose XRBG8888 and
···
  * Drivers are highly recommended to implement proper support for primary
  * planes, and newly merged drivers must not rely upon these transitional
  * helpers.
- *
- * The second part also implements transitional helpers which allow drivers to
- * gradually switch to the atomic helper infrastructure for plane updates. Once
- * that switch is complete drivers shouldn't use these any longer, instead using
- * the proper legacy implementations for update and disable plane hooks provided
- * by the atomic helpers.
- *
- * Again drivers are strongly urged to switch to the new interfaces.
  *
  * The plane helpers share the function table structures with other helpers,
  * specifically also the atomic helpers. See &struct drm_plane_helper_funcs for

include/drm/drm_crtc.h

···
  * intended to indicate whether a full modeset is needed, rather than strictly
  * describing what has changed in a commit. See also:
  * drm_atomic_crtc_needs_modeset()
- *
- * WARNING: Transitional helpers (like drm_helper_crtc_mode_set() or
- * drm_helper_crtc_mode_set_base()) do not maintain many of the derived control
- * state like @plane_mask so drivers not converted over to atomic helpers should
- * not rely on these being accurate!
  */
 struct drm_crtc_state {
 	/** @crtc: backpointer to the CRTC */

include/drm/drm_modeset_helper_vtables.h

···
 /**
  * struct drm_crtc_helper_funcs - helper operations for CRTCs
  *
- * These hooks are used by the legacy CRTC helpers, the transitional plane
- * helpers and the new atomic modesetting helpers.
+ * These hooks are used by the legacy CRTC helpers and the new atomic
+ * modesetting helpers.
  */
 struct drm_crtc_helper_funcs {
 	/**
···
 	 *
 	 * This callback is used to update the display mode of a CRTC without
 	 * changing anything of the primary plane configuration. This fits the
-	 * requirement of atomic and hence is used by the atomic helpers. It is
-	 * also used by the transitional plane helpers to implement a
-	 * @mode_set hook in drm_helper_crtc_mode_set().
+	 * requirement of atomic and hence is used by the atomic helpers.
 	 *
 	 * Note that the display pipe is completely off when this function is
 	 * called. Atomic drivers which need hardware to be running before they
···
 	 * all updated. Again the recommendation is to just call check helpers
 	 * until a maximal configuration is reached.
 	 *
-	 * This callback is used by the atomic modeset helpers and by the
-	 * transitional plane helpers, but it is optional.
+	 * This callback is used by the atomic modeset helpers, but it is
+	 * optional.
 	 *
 	 * NOTE:
 	 *
···
 	 * has picked. See drm_atomic_helper_commit_planes() for a discussion of
 	 * the tradeoffs and variants of plane commit helpers.
 	 *
-	 * This callback is used by the atomic modeset helpers and by the
-	 * transitional plane helpers, but it is optional.
+	 * This callback is used by the atomic modeset helpers, but it is
+	 * optional.
 	 */
 	void (*atomic_begin)(struct drm_crtc *crtc,
 			     struct drm_atomic_state *state);
···
 	 * has picked. See drm_atomic_helper_commit_planes() for a discussion of
 	 * the tradeoffs and variants of plane commit helpers.
 	 *
-	 * This callback is used by the atomic modeset helpers and by the
-	 * transitional plane helpers, but it is optional.
+	 * This callback is used by the atomic modeset helpers, but it is
+	 * optional.
 	 */
 	void (*atomic_flush)(struct drm_crtc *crtc,
 			     struct drm_atomic_state *state);
···
 /**
  * struct drm_encoder_helper_funcs - helper operations for encoders
  *
- * These hooks are used by the legacy CRTC helpers, the transitional plane
- * helpers and the new atomic modesetting helpers.
+ * These hooks are used by the legacy CRTC helpers and the new atomic
+ * modesetting helpers.
  */
 struct drm_encoder_helper_funcs {
 	/**
···
 /**
  * struct drm_plane_helper_funcs - helper operations for planes
  *
- * These functions are used by the atomic helpers and by the transitional plane
- * helpers.
+ * These functions are used by the atomic helpers.
  */
 struct drm_plane_helper_funcs {
 	/**
···
 	 * The helpers will call @cleanup_fb with matching arguments for every
 	 * successful call to this hook.
 	 *
-	 * This callback is used by the atomic modeset helpers and by the
-	 * transitional plane helpers, but it is optional. See @begin_fb_access
-	 * for preparing per-commit resources.
+	 * This callback is used by the atomic modeset helpers, but it is
+	 * optional. See @begin_fb_access for preparing per-commit resources.
 	 *
 	 * RETURNS:
 	 *
···
 	 * This hook is called to clean up any resources allocated for the given
 	 * framebuffer and plane configuration in @prepare_fb.
 	 *
-	 * This callback is used by the atomic modeset helpers and by the
-	 * transitional plane helpers, but it is optional.
+	 * This callback is used by the atomic modeset helpers, but it is
+	 * optional.
 	 */
 	void (*cleanup_fb)(struct drm_plane *plane,
 			   struct drm_plane_state *old_state);
···
 	 * all updated. Again the recommendation is to just call check helpers
 	 * until a maximal configuration is reached.
 	 *
-	 * This callback is used by the atomic modeset helpers and by the
-	 * transitional plane helpers, but it is optional.
+	 * This callback is used by the atomic modeset helpers, but it is
+	 * optional.
 	 *
 	 * NOTE:
 	 *
···
 	 * has picked. See drm_atomic_helper_commit_planes() for a discussion of
 	 * the tradeoffs and variants of plane commit helpers.
 	 *
-	 * This callback is used by the atomic modeset helpers and by the
-	 * transitional plane helpers, but it is optional.
+	 * This callback is used by the atomic modeset helpers, but it is optional.
 	 */
 	void (*atomic_update)(struct drm_plane *plane,
 			      struct drm_atomic_state *state);
···
 	 * has picked. See drm_atomic_helper_commit_planes() for a discussion of
 	 * the tradeoffs and variants of plane commit helpers.
 	 *
-	 * This callback is used by the atomic modeset helpers and by the
-	 * transitional plane helpers, but it is optional. It's intended to
-	 * reverse the effects of @atomic_enable.
+	 * This callback is used by the atomic modeset helpers, but it is
+	 * optional. It's intended to reverse the effects of @atomic_enable.
 	 */
 	void (*atomic_disable)(struct drm_plane *plane,
 			       struct drm_atomic_state *state);