diff options
| -rw-r--r-- | drivers/gpu/drm/drm_atomic_helper.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c index 40e4e1b6c911..3034ba09c0ee 100644 --- a/drivers/gpu/drm/drm_atomic_helper.c +++ b/drivers/gpu/drm/drm_atomic_helper.c @@ -1087,6 +1087,15 @@ EXPORT_SYMBOL(drm_atomic_helper_check_planes); * For example enable/disable of a cursor plane which have fixed zpos value * would trigger all other enabled planes to be forced to the state change. * + * IMPORTANT: + * + * As this function calls drm_atomic_helper_check_modeset() internally, its + * restrictions also apply: + * Drivers which set &drm_crtc_state.mode_changed (e.g. in their + * &drm_plane_helper_funcs.atomic_check hooks if a plane update can't be done + * without a full modeset) _must_ call drm_atomic_helper_check_modeset() + * function again after that change. + * * RETURNS: * Zero for success or -errno */ |