drm/plane-helper: Move drm_plane_helper_atomic_check() into udl

The udl driver is the only caller of drm_plane_helper_atomic_check().
Move the function into the driver. No functional changes.

v2:
	* fix documenation (Sui)

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Sui Jingfeng <suijingfeng@loongson.cn>
Link: https://patchwork.freedesktop.org/patch/msgid/20231204090852.1650-2-tzimmermann@suse.de

1 files changed, 0 insertions, 32 deletions

diff --git a/drivers/gpu/drm/drm_plane_helper.c b/drivers/gpu/drm/drm_plane_helper.c
index 5e95089676ff..7982be4b0306 100644
--- a/drivers/gpu/drm/drm_plane_helper.c
+++ b/drivers/gpu/drm/drm_plane_helper.c
@@ -279,35 +279,3 @@ void drm_plane_helper_destroy(struct drm_plane *plane)
 	kfree(plane);
 }
 EXPORT_SYMBOL(drm_plane_helper_destroy);
-
-/**
- * drm_plane_helper_atomic_check() - Helper to check plane atomic-state
- * @plane: plane to check
- * @state: atomic state object
- *
- * Provides a default plane-state check handler for planes whose atomic-state
- * scale and positioning are not expected to change since the plane is always
- * a fullscreen scanout buffer.
- *
- * This is often the case for the primary plane of simple framebuffers. See
- * also drm_crtc_helper_atomic_check() for the respective CRTC-state check
- * helper function.
- *
- * RETURNS:
- * Zero on success, or an errno code otherwise.
- */
-int drm_plane_helper_atomic_check(struct drm_plane *plane, struct drm_atomic_state *state)
-{
-	struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state, plane);
-	struct drm_crtc *new_crtc = new_plane_state->crtc;
-	struct drm_crtc_state *new_crtc_state = NULL;
-
-	if (new_crtc)
-		new_crtc_state = drm_atomic_get_new_crtc_state(state, new_crtc);
-
-	return drm_atomic_helper_check_plane_state(new_plane_state, new_crtc_state,
-						   DRM_PLANE_NO_SCALING,
-						   DRM_PLANE_NO_SCALING,
-						   false, false);
-}
-EXPORT_SYMBOL(drm_plane_helper_atomic_check);