drm: Export drm_plane_has_format()

Export drm_plane_has_format() so that drivers can use it.

v2: add kerneldoc
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240619113144.1616-1-ville.syrjala@linux.intel.comReviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Acked-by: Daniel Stone <daniels@collabora.com>
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>

drivers/gpu/drm/drm_crtc_internal.h

@@ -272,8 +272,6 @@ int drm_mode_atomic_ioctl(struct drm_device *dev,
 /* drm_plane.c */
 int drm_plane_register_all(struct drm_device *dev);
 void drm_plane_unregister_all(struct drm_device *dev);
-bool drm_plane_has_format(struct drm_plane *plane,
-			  u32 format, u64 modifier);
 struct drm_mode_rect *
 __drm_plane_get_damage_clips(const struct drm_plane_state *state);
 

drivers/gpu/drm/drm_plane.c

@@ -877,6 +877,15 @@ int drm_mode_getplane(struct drm_device *dev, void *data,
 	return 0;
 }
 
+/**
+ * drm_plane_has_format - Check whether the plane supports this format and modifier combination
+ * @plane: drm plane
+ * @format: pixel format (DRM_FORMAT_*)
+ * @modifier: data layout modifier
+ *
+ * Returns:
+ * Whether the plane supports the specified format and modifier combination.
+ */
 bool drm_plane_has_format(struct drm_plane *plane,
 			  u32 format, u64 modifier)
 {
@@ -906,6 +915,7 @@ bool drm_plane_has_format(struct drm_plane *plane,
 
 	return true;
 }
+EXPORT_SYMBOL(drm_plane_has_format);
 
 static int __setplane_check(struct drm_plane *plane,
 			    struct drm_crtc *crtc,

include/drm/drm_plane.h

@@ -972,6 +972,8 @@ static inline struct drm_plane *drm_plane_find(struct drm_device *dev,
 #define drm_for_each_plane(plane, dev) \
 	list_for_each_entry(plane, &(dev)->mode_config.plane_list, head)
 
+bool drm_plane_has_format(struct drm_plane *plane,
+			  u32 format, u64 modifier);
 bool drm_any_plane_has_format(struct drm_device *dev,
 			      u32 format, u64 modifier);