drm/simple-kms: Add plane-state helpers

Just like regular plane-state helpers, drivers can use these new
callbacks to create and destroy private plane state.

v2:
	* make duplicate_state interface compatible with
	  struct drm_plane_funcs

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Tested-by: Gerd Hoffmann <kraxel@redhat.com>
Acked-by: Gerd Hoffmann <kraxel@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210208115538.6430-2-tzimmermann@suse.de

1 files changed, 37 insertions, 3 deletions

diff --git a/drivers/gpu/drm/drm_simple_kms_helper.c b/drivers/gpu/drm/drm_simple_kms_helper.c
index 6ce8f5cd1eb5..89675d4b7b6c 100644
--- a/drivers/gpu/drm/drm_simple_kms_helper.c
+++ b/drivers/gpu/drm/drm_simple_kms_helper.c
@@ -253,13 +253,47 @@ static const struct drm_plane_helper_funcs drm_simple_kms_plane_helper_funcs = {
 	.atomic_update = drm_simple_kms_plane_atomic_update,
 };
 
+static void drm_simple_kms_plane_reset(struct drm_plane *plane)
+{
+	struct drm_simple_display_pipe *pipe;
+
+	pipe = container_of(plane, struct drm_simple_display_pipe, plane);
+	if (!pipe->funcs || !pipe->funcs->reset_plane)
+		return drm_atomic_helper_plane_reset(plane);
+
+	return pipe->funcs->reset_plane(pipe);
+}
+
+static struct drm_plane_state *drm_simple_kms_plane_duplicate_state(struct drm_plane *plane)
+{
+	struct drm_simple_display_pipe *pipe;
+
+	pipe = container_of(plane, struct drm_simple_display_pipe, plane);
+	if (!pipe->funcs || !pipe->funcs->duplicate_plane_state)
+		return drm_atomic_helper_plane_duplicate_state(plane);
+
+	return pipe->funcs->duplicate_plane_state(pipe);
+}
+
+static void drm_simple_kms_plane_destroy_state(struct drm_plane *plane,
+					       struct drm_plane_state *state)
+{
+	struct drm_simple_display_pipe *pipe;
+
+	pipe = container_of(plane, struct drm_simple_display_pipe, plane);
+	if (!pipe->funcs || !pipe->funcs->destroy_plane_state)
+		drm_atomic_helper_plane_destroy_state(plane, state);
+	else
+		pipe->funcs->destroy_plane_state(pipe, state);
+}
+
 static const struct drm_plane_funcs drm_simple_kms_plane_funcs = {
 	.update_plane		= drm_atomic_helper_update_plane,
 	.disable_plane		= drm_atomic_helper_disable_plane,
 	.destroy		= drm_plane_cleanup,
-	.reset			= drm_atomic_helper_plane_reset,
-	.atomic_duplicate_state	= drm_atomic_helper_plane_duplicate_state,
-	.atomic_destroy_state	= drm_atomic_helper_plane_destroy_state,
+	.reset			= drm_simple_kms_plane_reset,
+	.atomic_duplicate_state	= drm_simple_kms_plane_duplicate_state,
+	.atomic_destroy_state	= drm_simple_kms_plane_destroy_state,
 	.format_mod_supported   = drm_simple_kms_format_mod_supported,
 };