diff options
Diffstat (limited to 'drivers/gpu/drm/drm_crtc_helper.c')
| -rw-r--r-- | drivers/gpu/drm/drm_crtc_helper.c | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/drivers/gpu/drm/drm_crtc_helper.c b/drivers/gpu/drm/drm_crtc_helper.c index fa3694836c22..77a996f69cda 100644 --- a/drivers/gpu/drm/drm_crtc_helper.c +++ b/drivers/gpu/drm/drm_crtc_helper.c @@ -481,6 +481,17 @@ drm_crtc_helper_disable(struct drm_crtc *crtc) __drm_helper_disable_unused_functions(dev); } +/* + * For connectors that support multiple encoders, either the + * .atomic_best_encoder() or .best_encoder() operation must be implemented. + */ +struct drm_encoder * +drm_connector_get_single_encoder(struct drm_connector *connector) +{ + WARN_ON(connector->encoder_ids[1]); + return drm_encoder_find(connector->dev, NULL, connector->encoder_ids[0]); +} + /** * drm_crtc_helper_set_config - set a new config from userspace * @set: mode set configuration @@ -646,7 +657,11 @@ int drm_crtc_helper_set_config(struct drm_mode_set *set, new_encoder = connector->encoder; for (ro = 0; ro < set->num_connectors; ro++) { if (set->connectors[ro] == connector) { - new_encoder = connector_funcs->best_encoder(connector); + if (connector_funcs->best_encoder) + new_encoder = connector_funcs->best_encoder(connector); + else + new_encoder = drm_connector_get_single_encoder(connector); + /* if we can't get an encoder for a connector we are setting now - then fail */ if (new_encoder == NULL) |