diff options
| -rw-r--r-- | drivers/gpu/drm/drm_atomic_helper.c | 17 | ||||
| -rw-r--r-- | include/drm/drm_atomic_helper.h | 2 |
2 files changed, 19 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c index 46a3201b9851..43a0b3dfa846 100644 --- a/drivers/gpu/drm/drm_atomic_helper.c +++ b/drivers/gpu/drm/drm_atomic_helper.c @@ -2483,6 +2483,23 @@ backoff: EXPORT_SYMBOL(drm_atomic_helper_connector_dpms); /** + * drm_atomic_helper_best_encoder - Helper for &drm_connector_helper_funcs + * ->best_encoder callback + * @connector: Connector control structure + * + * This is a &drm_connector_helper_funcs ->best_encoder callback helper for + * connectors that support exactly 1 encoder, statically determined at driver + * init time. + */ +struct drm_encoder * +drm_atomic_helper_best_encoder(struct drm_connector *connector) +{ + WARN_ON(connector->encoder_ids[1]); + return drm_encoder_find(connector->dev, connector->encoder_ids[0]); +} +EXPORT_SYMBOL(drm_atomic_helper_best_encoder); + +/** * DOC: atomic state reset and initialization * * Both the drm core and the atomic helpers assume that there is always the full diff --git a/include/drm/drm_atomic_helper.h b/include/drm/drm_atomic_helper.h index 03642878bc51..ccca709a255b 100644 --- a/include/drm/drm_atomic_helper.h +++ b/include/drm/drm_atomic_helper.h @@ -110,6 +110,8 @@ int drm_atomic_helper_page_flip(struct drm_crtc *crtc, uint32_t flags); int drm_atomic_helper_connector_dpms(struct drm_connector *connector, int mode); +struct drm_encoder * +drm_atomic_helper_best_encoder(struct drm_connector *connector); /* default implementations for state handling */ void drm_atomic_helper_crtc_reset(struct drm_crtc *crtc); |