diff options
Diffstat (limited to 'drivers/gpu/drm/drm_dp_helper.c')
| -rw-r--r-- | drivers/gpu/drm/drm_dp_helper.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_dp_helper.c b/drivers/gpu/drm/drm_dp_helper.c index ffc68d305afe..f373798d82f6 100644 --- a/drivers/gpu/drm/drm_dp_helper.c +++ b/drivers/gpu/drm/drm_dp_helper.c @@ -1109,6 +1109,14 @@ EXPORT_SYMBOL(drm_dp_aux_init); * @aux: DisplayPort AUX channel * * Automatically calls drm_dp_aux_init() if this hasn't been done yet. + * This should only be called when the underlying &struct drm_connector is + * initialiazed already. Therefore the best place to call this is from + * &drm_connector_funcs.late_register. Not that drivers which don't follow this + * will Oops when CONFIG_DRM_DP_AUX_CHARDEV is enabled. + * + * Drivers which need to use the aux channel before that point (e.g. at driver + * load time, before drm_dev_register() has been called) need to call + * drm_dp_aux_init(). * * Returns 0 on success or a negative error code on failure. */ |