The current documentation of drm_atomic_state says that it's the "global
state object". This is confusing since, while it does contain all the
objects affected by an update and their respective states, if an object
isn't affected by this update it won't be part of it.
Thus, it's not truly a "global state", unlike object state structures
that do contain the entire state of a given object.
Signed-off-by: Maxime Ripard <mripard@xxxxxxxxxx>
---
include/drm/drm_atomic.h | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/include/drm/drm_atomic.h b/include/drm/drm_atomic.h
index 914574b58ae7..81ad7369b90d 100644
--- a/include/drm/drm_atomic.h
+++ b/include/drm/drm_atomic.h
@@ -346,11 +346,19 @@ struct __drm_private_objs_state {
};
/**
- * struct drm_atomic_state - the global state object for atomic updates
+ * struct drm_atomic_state - Atomic Update structure
+ *
+ * This structure is the kernel counterpart of @drm_mode_atomic and contains
+ * all the objects affected by an atomic modeset update and their states.
*
* States are added to an atomic update by calling drm_atomic_get_crtc_state(),
* drm_atomic_get_plane_state(), drm_atomic_get_connector_state(), or for
* private state structures, drm_atomic_get_private_obj_state().
+ *
+ * NOTE: While this structure looks to be global and affecting the whole DRM
+ * device, it only contains the objects affected by the atomic commit.
+ * Unaffected objects will not be part of that update, unless they have been
+ * explicitly added by either the framework or the driver.
*/
struct drm_atomic_state {
/**
--
2.43.0
