backend/drm: introduce wlr_drm_mode_get_info()

This allows compositors to get back the raw drmModeModeInfo and
look at DRM-specific fields and flags.

2 files changed, 12 insertions, 0 deletions

diff --git a/backend/drm/drm.c b/backend/drm/drm.c
index d2a4f074..cc887a14 100644
--- a/backend/drm/drm.c
+++ b/backend/drm/drm.c
@@ -907,6 +907,11 @@ struct wlr_output_mode *wlr_drm_connector_add_mode(struct wlr_output *output,
 	return &mode->wlr_mode;
 }
 
+const drmModeModeInfo *wlr_drm_mode_get_info(struct wlr_output_mode *wlr_mode) {
+	const struct wlr_drm_mode *mode = wl_container_of(wlr_mode, mode, wlr_mode);
+	return &mode->drm_mode;
+}
+
 static bool drm_connector_set_cursor(struct wlr_output *output,
 		struct wlr_buffer *buffer, int hotspot_x, int hotspot_y) {
 	struct wlr_drm_connector *conn = get_drm_connector_from_output(output);
diff --git a/include/wlr/backend/drm.h b/include/wlr/backend/drm.h
index 414d90c0..e4fdf65d 100644
--- a/include/wlr/backend/drm.h
+++ b/include/wlr/backend/drm.h
@@ -79,6 +79,13 @@ struct wlr_output_mode *wlr_drm_connector_add_mode(struct wlr_output *output,
 	const drmModeModeInfo *mode);
 
 /**
+ * Get the raw DRM mode information from a struct wlr_output_mode.
+ *
+ * The mode passed in must belong to a DRM output.
+ */
+const drmModeModeInfo *wlr_drm_mode_get_info(struct wlr_output_mode *mode);
+
+/**
  * Get the connector's panel orientation.
  *
  * On some devices the panel is mounted in the casing in such a way that the