diff options
| -rw-r--r-- | drivers/gpu/drm/drm_atomic.c | 60 | ||||
| -rw-r--r-- | include/drm/drm_atomic.h | 7 |
2 files changed, 67 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c index 5457c02ca1ab..7cc39f6e7135 100644 --- a/drivers/gpu/drm/drm_atomic.c +++ b/drivers/gpu/drm/drm_atomic.c @@ -985,6 +985,66 @@ drm_atomic_get_new_connector_for_encoder(const struct drm_atomic_state *state, EXPORT_SYMBOL(drm_atomic_get_new_connector_for_encoder); /** + * drm_atomic_get_old_crtc_for_encoder - Get old crtc for an encoder + * @state: Atomic state + * @encoder: The encoder to fetch the crtc state for + * + * This function finds and returns the crtc that was connected to @encoder + * as specified by the @state. + * + * Returns: The old crtc connected to @encoder, or NULL if the encoder is + * not connected. + */ +struct drm_crtc * +drm_atomic_get_old_crtc_for_encoder(struct drm_atomic_state *state, + struct drm_encoder *encoder) +{ + struct drm_connector *connector; + struct drm_connector_state *conn_state; + + connector = drm_atomic_get_old_connector_for_encoder(state, encoder); + if (!connector) + return NULL; + + conn_state = drm_atomic_get_old_connector_state(state, connector); + if (!conn_state) + return NULL; + + return conn_state->crtc; +} +EXPORT_SYMBOL(drm_atomic_get_old_crtc_for_encoder); + +/** + * drm_atomic_get_new_crtc_for_encoder - Get new crtc for an encoder + * @state: Atomic state + * @encoder: The encoder to fetch the crtc state for + * + * This function finds and returns the crtc that will be connected to @encoder + * as specified by the @state. + * + * Returns: The new crtc connected to @encoder, or NULL if the encoder is + * not connected. + */ +struct drm_crtc * +drm_atomic_get_new_crtc_for_encoder(struct drm_atomic_state *state, + struct drm_encoder *encoder) +{ + struct drm_connector *connector; + struct drm_connector_state *conn_state; + + connector = drm_atomic_get_new_connector_for_encoder(state, encoder); + if (!connector) + return NULL; + + conn_state = drm_atomic_get_new_connector_state(state, connector); + if (!conn_state) + return NULL; + + return conn_state->crtc; +} +EXPORT_SYMBOL(drm_atomic_get_new_crtc_for_encoder); + +/** * drm_atomic_get_connector_state - get connector state * @state: global atomic state object * @connector: connector to get state object for diff --git a/include/drm/drm_atomic.h b/include/drm/drm_atomic.h index 92586ab55ef5..9a022caacf93 100644 --- a/include/drm/drm_atomic.h +++ b/include/drm/drm_atomic.h @@ -528,6 +528,13 @@ struct drm_connector * drm_atomic_get_new_connector_for_encoder(const struct drm_atomic_state *state, struct drm_encoder *encoder); +struct drm_crtc * +drm_atomic_get_old_crtc_for_encoder(struct drm_atomic_state *state, + struct drm_encoder *encoder); +struct drm_crtc * +drm_atomic_get_new_crtc_for_encoder(struct drm_atomic_state *state, + struct drm_encoder *encoder); + /** * drm_atomic_get_existing_crtc_state - get CRTC state, if it exists * @state: global atomic state object |