57  * track of a per-connector hpd interrupt.
91 			   struct drm_connector *connector,  in drm_mode_validate_pipeline()  argument
95 	struct drm_device *dev = connector->dev;  in drm_mode_validate_pipeline()
99 	/* Step 1: Validate against connector */  in drm_mode_validate_pipeline()
100 	ret = drm_connector_mode_valid(connector, mode, ctx, status);  in drm_mode_validate_pipeline()
105 	drm_connector_for_each_possible_encoder(connector, encoder) {  in drm_mode_validate_pipeline()
120 						      &connector->display_info,  in drm_mode_validate_pipeline()
145 static int drm_helper_probe_add_cmdline_mode(struct drm_connector *connector)  in drm_helper_probe_add_cmdline_mode()  argument
150 	cmdline_mode = &connector->cmdline_mode;  in drm_helper_probe_add_cmdline_mode()
155 	list_for_each_entry(mode, &connector->probed_modes, head) {  in drm_helper_probe_add_cmdline_mode()
171 	mode = drm_mode_create_from_cmdline_mode(connector->dev,  in drm_helper_probe_add_cmdline_mode()
176 	drm_mode_probed_add(connector, mode);  in drm_helper_probe_add_cmdline_mode()
204 drm_connector_mode_valid(struct drm_connector *connector,  in drm_connector_mode_valid()  argument
210 		connector->helper_private;  in drm_connector_mode_valid()
216 		ret = connector_funcs->mode_valid_ctx(connector, mode, ctx,  in drm_connector_mode_valid()
219 		*status = connector_funcs->mode_valid(connector, mode);  in drm_connector_mode_valid()
228 	struct drm_connector *connector;  in drm_kms_helper_disable_hpd()  local
232 	drm_for_each_connector_iter(connector, &conn_iter) {  in drm_kms_helper_disable_hpd()
234 			connector->helper_private;  in drm_kms_helper_disable_hpd()
237 			funcs->disable_hpd(connector);  in drm_kms_helper_disable_hpd()
245 	struct drm_connector *connector;  in drm_kms_helper_enable_hpd()  local
249 	drm_for_each_connector_iter(connector, &conn_iter) {  in drm_kms_helper_enable_hpd()
251 			connector->helper_private;  in drm_kms_helper_enable_hpd()
254 			funcs->enable_hpd(connector);  in drm_kms_helper_enable_hpd()
256 		if (connector->polled & (DRM_CONNECTOR_POLL_CONNECT |  in drm_kms_helper_enable_hpd()
323  * connector has been enabled.
325  * Drivers must call this helper after enabling polling for a connector by
328  * flags for a connector will stop the output polling work automatically if
341 static int detect_connector_status(struct drm_connector *connector,  in detect_connector_status()  argument
345 	const struct drm_connector_helper_funcs *funcs = connector->helper_private;  in detect_connector_status()
348 		return funcs->detect_ctx(connector, ctx, force);  in detect_connector_status()
349 	else if (connector->funcs->detect)  in detect_connector_status()
350 		return connector->funcs->detect(connector, force);  in detect_connector_status()
356 drm_helper_probe_detect_ctx(struct drm_connector *connector, bool force)  in drm_helper_probe_detect_ctx()  argument
364 	ret = drm_modeset_lock(&connector->dev->mode_config.connection_mutex, &ctx);  in drm_helper_probe_detect_ctx()
366 		ret = detect_connector_status(connector, &ctx, force);  in drm_helper_probe_detect_ctx()
376 	if (ret != connector->status)  in drm_helper_probe_detect_ctx()
377 		connector->epoch_counter += 1;  in drm_helper_probe_detect_ctx()
386  * drm_helper_probe_detect - probe connector status
387  * @connector: connector to probe
391  * This function calls the detect callbacks of the connector.
396 drm_helper_probe_detect(struct drm_connector *connector,  in drm_helper_probe_detect()  argument
400 	struct drm_device *dev = connector->dev;  in drm_helper_probe_detect()
404 		return drm_helper_probe_detect_ctx(connector, force);  in drm_helper_probe_detect()
410 	ret = detect_connector_status(connector, ctx, force);  in drm_helper_probe_detect()
412 	if (ret != connector->status)  in drm_helper_probe_detect()
413 		connector->epoch_counter += 1;  in drm_helper_probe_detect()
419 static int drm_helper_probe_get_modes(struct drm_connector *connector)  in drm_helper_probe_get_modes()  argument
422 		connector->helper_private;  in drm_helper_probe_get_modes()
425 	count = connector_funcs->get_modes(connector);  in drm_helper_probe_get_modes()
429 		drm_err(connector->dev, ".get_modes() returned %pe\n",  in drm_helper_probe_get_modes()
438 	if (count == 0 && connector->status == connector_status_connected)  in drm_helper_probe_get_modes()
439 		count = drm_edid_override_connector_update(connector);  in drm_helper_probe_get_modes()
444 static int __drm_helper_update_and_validate(struct drm_connector *connector,  in __drm_helper_update_and_validate()  argument
448 	struct drm_device *dev = connector->dev;  in __drm_helper_update_and_validate()
453 	drm_connector_list_update(connector);  in __drm_helper_update_and_validate()
455 	if (connector->interlace_allowed)  in __drm_helper_update_and_validate()
457 	if (connector->doublescan_allowed)  in __drm_helper_update_and_validate()
459 	if (connector->stereo_allowed)  in __drm_helper_update_and_validate()
462 	list_for_each_entry(mode, &connector->modes, head) {  in __drm_helper_update_and_validate()
478 		mode->status = drm_mode_validate_ycbcr420(mode, connector);  in __drm_helper_update_and_validate()
482 		ret = drm_mode_validate_pipeline(mode, connector, ctx,  in __drm_helper_update_and_validate()
501  * @connector: connector to probe
505  * Based on the helper callbacks implemented by @connector in struct
507  * be added to the connector's probed_modes list, then culled (based on validity
516  * 1. All modes currently on the connector's modes list are marked as stale
518  * 2. New modes are added to the connector's probed_modes list with
523  *    - if the connector status is connector_status_connected, standard
541  *    - drm_mode_validate_flag() checks the modes against basic connector
551  * 5. Any mode whose status is not OK is pruned from the connector's modes list,
556  * The number of modes found on @connector.
558 int drm_helper_probe_single_connector_modes(struct drm_connector *connector,  in drm_helper_probe_single_connector_modes()  argument
561 	struct drm_device *dev = connector->dev;  in drm_helper_probe_single_connector_modes()
571 	drm_dbg_kms(dev, "[CONNECTOR:%d:%s]\n", connector->base.id,  in drm_helper_probe_single_connector_modes()
572 		    connector->name);  in drm_helper_probe_single_connector_modes()
583 	list_for_each_entry(mode, &connector->modes, head)  in drm_helper_probe_single_connector_modes()
586 	old_status = connector->status;  in drm_helper_probe_single_connector_modes()
588 	if (connector->force) {  in drm_helper_probe_single_connector_modes()
589 		if (connector->force == DRM_FORCE_ON ||  in drm_helper_probe_single_connector_modes()
590 		    connector->force == DRM_FORCE_ON_DIGITAL)  in drm_helper_probe_single_connector_modes()
591 			connector->status = connector_status_connected;  in drm_helper_probe_single_connector_modes()
593 			connector->status = connector_status_disconnected;  in drm_helper_probe_single_connector_modes()
594 		if (connector->funcs->force)  in drm_helper_probe_single_connector_modes()
595 			connector->funcs->force(connector);  in drm_helper_probe_single_connector_modes()
597 		ret = drm_helper_probe_detect(connector, &ctx, true);  in drm_helper_probe_single_connector_modes()
602 		} else if (WARN(ret < 0, "Invalid return value %i for connector detection\n", ret))  in drm_helper_probe_single_connector_modes()
605 		connector->status = ret;  in drm_helper_probe_single_connector_modes()
614 	if (old_status != connector->status) {  in drm_helper_probe_single_connector_modes()
615 		drm_dbg_kms(dev, "[CONNECTOR:%d:%s] status updated from %s to %s\n",  in drm_helper_probe_single_connector_modes()
616 			    connector->base.id, connector->name,  in drm_helper_probe_single_connector_modes()
618 			    drm_get_connector_status_name(connector->status));  in drm_helper_probe_single_connector_modes()
640 	if (connector->status == connector_status_disconnected) {  in drm_helper_probe_single_connector_modes()
641 		drm_dbg_kms(dev, "[CONNECTOR:%d:%s] disconnected\n",  in drm_helper_probe_single_connector_modes()
642 			    connector->base.id, connector->name);  in drm_helper_probe_single_connector_modes()
643 		drm_connector_update_edid_property(connector, NULL);  in drm_helper_probe_single_connector_modes()
644 		drm_mode_prune_invalid(dev, &connector->modes, false);  in drm_helper_probe_single_connector_modes()
648 	count = drm_helper_probe_get_modes(connector);  in drm_helper_probe_single_connector_modes()
650 	if (count == 0 && (connector->status == connector_status_connected ||  in drm_helper_probe_single_connector_modes()
651 			   connector->status == connector_status_unknown)) {  in drm_helper_probe_single_connector_modes()
652 		count = drm_add_modes_noedid(connector, 1024, 768);  in drm_helper_probe_single_connector_modes()
659 		if (connector->connector_type == DRM_MODE_CONNECTOR_DisplayPort)  in drm_helper_probe_single_connector_modes()
660 			drm_set_preferred_mode(connector, 640, 480);  in drm_helper_probe_single_connector_modes()
662 	count += drm_helper_probe_add_cmdline_mode(connector);  in drm_helper_probe_single_connector_modes()
664 		ret = __drm_helper_update_and_validate(connector, maxX, maxY, &ctx);  in drm_helper_probe_single_connector_modes()
671 	drm_mode_prune_invalid(dev, &connector->modes, true);  in drm_helper_probe_single_connector_modes()
680 	if (list_empty(&connector->modes) &&  in drm_helper_probe_single_connector_modes()
681 	    connector->connector_type == DRM_MODE_CONNECTOR_DisplayPort) {  in drm_helper_probe_single_connector_modes()
682 		count = drm_add_modes_noedid(connector, 640, 480);  in drm_helper_probe_single_connector_modes()
683 		ret = __drm_helper_update_and_validate(connector, maxX, maxY, &ctx);  in drm_helper_probe_single_connector_modes()
688 		drm_mode_prune_invalid(dev, &connector->modes, true);  in drm_helper_probe_single_connector_modes()
695 	if (list_empty(&connector->modes))  in drm_helper_probe_single_connector_modes()
698 	drm_mode_sort(&connector->modes);  in drm_helper_probe_single_connector_modes()
700 	drm_dbg_kms(dev, "[CONNECTOR:%d:%s] probed modes:\n",  in drm_helper_probe_single_connector_modes()
701 		    connector->base.id, connector->name);  in drm_helper_probe_single_connector_modes()
703 	list_for_each_entry(mode, &connector->modes, head) {  in drm_helper_probe_single_connector_modes()
715  * @dev: drm_device whose connector state changed
729  * If only a single connector has changed, consider calling
740  * drm_kms_helper_connector_hotplug_event - fire off a KMS connector hotplug event
741  * @connector: drm_connector which has changed
744  * fine-grained uevent for a single connector.
746 void drm_kms_helper_connector_hotplug_event(struct drm_connector *connector)  in drm_kms_helper_connector_hotplug_event()  argument
748 	struct drm_device *dev = connector->dev;  in drm_kms_helper_connector_hotplug_event()
750 	drm_sysfs_connector_hotplug_event(connector);  in drm_kms_helper_connector_hotplug_event()
759 	struct drm_connector *connector;  in output_poll_execute()  local
786 	drm_for_each_connector_iter(connector, &conn_iter) {  in output_poll_execute()
788 		if (connector->force)  in output_poll_execute()
793 		if (!connector->polled || connector->polled == DRM_CONNECTOR_POLL_HPD)  in output_poll_execute()
796 		old_status = connector->status;  in output_poll_execute()
800 		    !(connector->polled & DRM_CONNECTOR_POLL_DISCONNECT))  in output_poll_execute()
805 		old_epoch_counter = connector->epoch_counter;  in output_poll_execute()
806 		connector->status = drm_helper_probe_detect(connector, NULL, false);  in output_poll_execute()
807 		if (old_epoch_counter != connector->epoch_counter) {  in output_poll_execute()
823 			if (connector->status == connector_status_unknown) {  in output_poll_execute()
824 				connector->status = old_status;  in output_poll_execute()
829 			new = drm_get_connector_status_name(connector->status);  in output_poll_execute()
831 			drm_dbg_kms(dev, "[CONNECTOR:%d:%s] status updated from %s to %s\n",  in output_poll_execute()
832 				    connector->base.id, connector->name,  in output_poll_execute()
834 			drm_dbg_kms(dev, "[CONNECTOR:%d:%s] epoch counter %llu -> %llu\n",  in output_poll_execute()
835 				    connector->base.id, connector->name,  in output_poll_execute()
836 				    old_epoch_counter, connector->epoch_counter);  in output_poll_execute()
863  * connector ->detect hook.
920  * Note that a connector can be both polled and probed from the hotplug handler,
973 static bool check_connector_changed(struct drm_connector *connector)  in check_connector_changed()  argument
975 	struct drm_device *dev = connector->dev;  in check_connector_changed()
980 	drm_WARN_ON(dev, !(connector->polled & DRM_CONNECTOR_POLL_HPD));  in check_connector_changed()
984 	old_status = connector->status;  in check_connector_changed()
985 	old_epoch_counter = connector->epoch_counter;  in check_connector_changed()
986 	connector->status = drm_helper_probe_detect(connector, NULL, false);  in check_connector_changed()
988 	if (old_epoch_counter == connector->epoch_counter) {  in check_connector_changed()
989 		drm_dbg_kms(dev, "[CONNECTOR:%d:%s] Same epoch counter %llu\n",  in check_connector_changed()
990 			    connector->base.id,  in check_connector_changed()
991 			    connector->name,  in check_connector_changed()
992 			    connector->epoch_counter);  in check_connector_changed()
997 	drm_dbg_kms(dev, "[CONNECTOR:%d:%s] status updated from %s to %s\n",  in check_connector_changed()
998 		    connector->base.id,  in check_connector_changed()
999 		    connector->name,  in check_connector_changed()
1001 		    drm_get_connector_status_name(connector->status));  in check_connector_changed()
1003 	drm_dbg_kms(dev, "[CONNECTOR:%d:%s] Changed epoch counter %llu => %llu\n",  in check_connector_changed()
1004 		    connector->base.id,  in check_connector_changed()
1005 		    connector->name,  in check_connector_changed()
1007 		    connector->epoch_counter);  in check_connector_changed()
1014  * @connector: drm_connector
1016  * Drivers can use this helper function to run a detect cycle on a connector
1020  * interrupts for a single connector. Drivers that want to send a
1022  * per connector need to use drm_helper_hpd_irq_event().
1027  * Note that a connector can be both polled and probed from the hotplug
1031  * A boolean indicating whether the connector status changed or not
1033 bool drm_connector_helper_hpd_irq_event(struct drm_connector *connector)  in drm_connector_helper_hpd_irq_event()  argument
1035 	struct drm_device *dev = connector->dev;  in drm_connector_helper_hpd_irq_event()
1039 	changed = check_connector_changed(connector);  in drm_connector_helper_hpd_irq_event()
1043 		drm_kms_helper_connector_hotplug_event(connector);  in drm_connector_helper_hpd_irq_event()
1044 		drm_dbg_kms(dev, "[CONNECTOR:%d:%s] Sent hotplug event\n",  in drm_connector_helper_hpd_irq_event()
1045 			    connector->base.id,  in drm_connector_helper_hpd_irq_event()
1046 			    connector->name);  in drm_connector_helper_hpd_irq_event()
1063  * interrupts for each connector.
1065  * Drivers which support hotplug interrupts for each connector individually and
1068  * code and directly call drm_kms_helper_hotplug_event() in case the connector
1074  * Note that a connector can be both polled and probed from the hotplug handler,
1078  * A boolean indicating whether the connector status changed or not
1082 	struct drm_connector *connector, *first_changed_connector = NULL;  in drm_helper_hpd_irq_event()  local
1091 	drm_for_each_connector_iter(connector, &conn_iter) {  in drm_helper_hpd_irq_event()
1093 		if (!(connector->polled & DRM_CONNECTOR_POLL_HPD))  in drm_helper_hpd_irq_event()
1096 		if (check_connector_changed(connector)) {  in drm_helper_hpd_irq_event()
1098 				drm_connector_get(connector);  in drm_helper_hpd_irq_event()
1099 				first_changed_connector = connector;  in drm_helper_hpd_irq_event()
1145  * drm_connector_helper_get_modes_fixed - Duplicates a display mode for a connector
1146  * @connector: the connector
1149  * This function duplicates a display modes for a connector. Drivers for hardware
1150  * that only supports a single fixed mode can use this function in their connector's
1156 int drm_connector_helper_get_modes_fixed(struct drm_connector *connector,  in drm_connector_helper_get_modes_fixed()  argument
1159 	struct drm_device *dev = connector->dev;  in drm_connector_helper_get_modes_fixed()
1173 	drm_mode_probed_add(connector, mode);  in drm_connector_helper_get_modes_fixed()
1176 		connector->display_info.width_mm = mode->width_mm;  in drm_connector_helper_get_modes_fixed()
1178 		connector->display_info.height_mm = mode->height_mm;  in drm_connector_helper_get_modes_fixed()
1185  * drm_connector_helper_get_modes - Read EDID and update connector.
1186  * @connector: The connector
1188  * Read the EDID using drm_edid_read() (which requires that connector->ddc is
1189  * set), and update the connector using the EDID.
1191  * This can be used as the "default" connector helper .get_modes() hook if the
1193  * custom .get_modes() hooks should do regarding EDID read and connector update.
1197 int drm_connector_helper_get_modes(struct drm_connector *connector)  in drm_connector_helper_get_modes()  argument
1202 	drm_edid = drm_edid_read(connector);  in drm_connector_helper_get_modes()
1205 	 * Unconditionally update the connector. If the EDID was read  in drm_connector_helper_get_modes()
1206 	 * successfully, fill in the connector information derived from the  in drm_connector_helper_get_modes()
1207 	 * EDID. Otherwise, if the EDID is NULL, clear the connector  in drm_connector_helper_get_modes()
1210 	drm_edid_connector_update(connector, drm_edid);  in drm_connector_helper_get_modes()
1212 	count = drm_edid_connector_add_modes(connector);  in drm_connector_helper_get_modes()
1221  * drm_connector_helper_tv_get_modes - Fills the modes availables to a TV connector
1222  * @connector: The connector
1224  * Fills the available modes for a TV connector based on the supported
1227  * This can be used as the default TV connector helper .get_modes() hook
1231  * The number of modes added to the connector.
1233 int drm_connector_helper_tv_get_modes(struct drm_connector *connector)  in drm_connector_helper_tv_get_modes()  argument
1235 	struct drm_device *dev = connector->dev;  in drm_connector_helper_tv_get_modes()
1238 	struct drm_cmdline_mode *cmdline = &connector->cmdline_mode;  in drm_connector_helper_tv_get_modes()
1260 		if (drm_object_property_get_default_value(&connector->base,  in drm_connector_helper_tv_get_modes()
1296 		drm_mode_probed_add(connector, mode);  in drm_connector_helper_tv_get_modes()
1304  * drm_connector_helper_detect_from_ddc - Read EDID and detect connector status.
1305  * @connector: The connector
1309  * Detects the connector status by reading the EDID using drm_probe_ddc(),
1310  * which requires connector->ddc to be set. Returns connector_status_connected
1314  * The connector status as defined by enum drm_connector_status.
1316 int drm_connector_helper_detect_from_ddc(struct drm_connector *connector,  in drm_connector_helper_detect_from_ddc()  argument
1320 	struct i2c_adapter *ddc = connector->ddc;  in drm_connector_helper_detect_from_ddc()