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
342 drm_helper_probe_detect_ctx(struct drm_connector *connector, bool force)  in drm_helper_probe_detect_ctx()  argument
344 	const struct drm_connector_helper_funcs *funcs = connector->helper_private;  in drm_helper_probe_detect_ctx()
351 	ret = drm_modeset_lock(&connector->dev->mode_config.connection_mutex, &ctx);  in drm_helper_probe_detect_ctx()
354 			ret = funcs->detect_ctx(connector, &ctx, force);  in drm_helper_probe_detect_ctx()
355 		else if (connector->funcs->detect)  in drm_helper_probe_detect_ctx()
356 			ret = connector->funcs->detect(connector, force);  in drm_helper_probe_detect_ctx()
369 	if (ret != connector->status)  in drm_helper_probe_detect_ctx()
370 		connector->epoch_counter += 1;  in drm_helper_probe_detect_ctx()
379  * drm_helper_probe_detect - probe connector status
380  * @connector: connector to probe
384  * This function calls the detect callbacks of the connector.
389 drm_helper_probe_detect(struct drm_connector *connector,  in drm_helper_probe_detect()  argument
393 	const struct drm_connector_helper_funcs *funcs = connector->helper_private;  in drm_helper_probe_detect()
394 	struct drm_device *dev = connector->dev;  in drm_helper_probe_detect()
398 		return drm_helper_probe_detect_ctx(connector, force);  in drm_helper_probe_detect()
405 		ret = funcs->detect_ctx(connector, ctx, force);  in drm_helper_probe_detect()
406 	else if (connector->funcs->detect)  in drm_helper_probe_detect()
407 		ret = connector->funcs->detect(connector, force);  in drm_helper_probe_detect()
411 	if (ret != connector->status)  in drm_helper_probe_detect()
412 		connector->epoch_counter += 1;  in drm_helper_probe_detect()
418 static int drm_helper_probe_get_modes(struct drm_connector *connector)  in drm_helper_probe_get_modes()  argument
421 		connector->helper_private;  in drm_helper_probe_get_modes()
424 	count = connector_funcs->get_modes(connector);  in drm_helper_probe_get_modes()
428 		drm_err(connector->dev, ".get_modes() returned %pe\n",  in drm_helper_probe_get_modes()
437 	if (count == 0 && connector->status == connector_status_connected)  in drm_helper_probe_get_modes()
438 		count = drm_edid_override_connector_update(connector);  in drm_helper_probe_get_modes()
443 static int __drm_helper_update_and_validate(struct drm_connector *connector,  in __drm_helper_update_and_validate()  argument
447 	struct drm_device *dev = connector->dev;  in __drm_helper_update_and_validate()
452 	drm_connector_list_update(connector);  in __drm_helper_update_and_validate()
454 	if (connector->interlace_allowed)  in __drm_helper_update_and_validate()
456 	if (connector->doublescan_allowed)  in __drm_helper_update_and_validate()
458 	if (connector->stereo_allowed)  in __drm_helper_update_and_validate()
461 	list_for_each_entry(mode, &connector->modes, head) {  in __drm_helper_update_and_validate()
477 		mode->status = drm_mode_validate_ycbcr420(mode, connector);  in __drm_helper_update_and_validate()
481 		ret = drm_mode_validate_pipeline(mode, connector, ctx,  in __drm_helper_update_and_validate()
500  * @connector: connector to probe
504  * Based on the helper callbacks implemented by @connector in struct
506  * be added to the connector's probed_modes list, then culled (based on validity
515  * 1. All modes currently on the connector's modes list are marked as stale
517  * 2. New modes are added to the connector's probed_modes list with
522  *    - if the connector status is connector_status_connected, standard
540  *    - drm_mode_validate_flag() checks the modes against basic connector
550  * 5. Any mode whose status is not OK is pruned from the connector's modes list,
555  * The number of modes found on @connector.
557 int drm_helper_probe_single_connector_modes(struct drm_connector *connector,  in drm_helper_probe_single_connector_modes()  argument
560 	struct drm_device *dev = connector->dev;  in drm_helper_probe_single_connector_modes()
570 	drm_dbg_kms(dev, "[CONNECTOR:%d:%s]\n", connector->base.id,  in drm_helper_probe_single_connector_modes()
571 		    connector->name);  in drm_helper_probe_single_connector_modes()
582 	list_for_each_entry(mode, &connector->modes, head)  in drm_helper_probe_single_connector_modes()
585 	old_status = connector->status;  in drm_helper_probe_single_connector_modes()
587 	if (connector->force) {  in drm_helper_probe_single_connector_modes()
588 		if (connector->force == DRM_FORCE_ON ||  in drm_helper_probe_single_connector_modes()
589 		    connector->force == DRM_FORCE_ON_DIGITAL)  in drm_helper_probe_single_connector_modes()
590 			connector->status = connector_status_connected;  in drm_helper_probe_single_connector_modes()
592 			connector->status = connector_status_disconnected;  in drm_helper_probe_single_connector_modes()
593 		if (connector->funcs->force)  in drm_helper_probe_single_connector_modes()
594 			connector->funcs->force(connector);  in drm_helper_probe_single_connector_modes()
596 		ret = drm_helper_probe_detect(connector, &ctx, true);  in drm_helper_probe_single_connector_modes()
601 		} else if (WARN(ret < 0, "Invalid return value %i for connector detection\n", ret))  in drm_helper_probe_single_connector_modes()
604 		connector->status = ret;  in drm_helper_probe_single_connector_modes()
613 	if (old_status != connector->status) {  in drm_helper_probe_single_connector_modes()
614 		drm_dbg_kms(dev, "[CONNECTOR:%d:%s] status updated from %s to %s\n",  in drm_helper_probe_single_connector_modes()
615 			    connector->base.id, connector->name,  in drm_helper_probe_single_connector_modes()
617 			    drm_get_connector_status_name(connector->status));  in drm_helper_probe_single_connector_modes()
639 	if (connector->status == connector_status_disconnected) {  in drm_helper_probe_single_connector_modes()
640 		drm_dbg_kms(dev, "[CONNECTOR:%d:%s] disconnected\n",  in drm_helper_probe_single_connector_modes()
641 			    connector->base.id, connector->name);  in drm_helper_probe_single_connector_modes()
642 		drm_connector_update_edid_property(connector, NULL);  in drm_helper_probe_single_connector_modes()
643 		drm_mode_prune_invalid(dev, &connector->modes, false);  in drm_helper_probe_single_connector_modes()
647 	count = drm_helper_probe_get_modes(connector);  in drm_helper_probe_single_connector_modes()
649 	if (count == 0 && (connector->status == connector_status_connected ||  in drm_helper_probe_single_connector_modes()
650 			   connector->status == connector_status_unknown)) {  in drm_helper_probe_single_connector_modes()
651 		count = drm_add_modes_noedid(connector, 1024, 768);  in drm_helper_probe_single_connector_modes()
658 		if (connector->connector_type == DRM_MODE_CONNECTOR_DisplayPort)  in drm_helper_probe_single_connector_modes()
659 			drm_set_preferred_mode(connector, 640, 480);  in drm_helper_probe_single_connector_modes()
661 	count += drm_helper_probe_add_cmdline_mode(connector);  in drm_helper_probe_single_connector_modes()
663 		ret = __drm_helper_update_and_validate(connector, maxX, maxY, &ctx);  in drm_helper_probe_single_connector_modes()
670 	drm_mode_prune_invalid(dev, &connector->modes, true);  in drm_helper_probe_single_connector_modes()
679 	if (list_empty(&connector->modes) &&  in drm_helper_probe_single_connector_modes()
680 	    connector->connector_type == DRM_MODE_CONNECTOR_DisplayPort) {  in drm_helper_probe_single_connector_modes()
681 		count = drm_add_modes_noedid(connector, 640, 480);  in drm_helper_probe_single_connector_modes()
682 		ret = __drm_helper_update_and_validate(connector, maxX, maxY, &ctx);  in drm_helper_probe_single_connector_modes()
687 		drm_mode_prune_invalid(dev, &connector->modes, true);  in drm_helper_probe_single_connector_modes()
694 	if (list_empty(&connector->modes))  in drm_helper_probe_single_connector_modes()
697 	drm_mode_sort(&connector->modes);  in drm_helper_probe_single_connector_modes()
699 	drm_dbg_kms(dev, "[CONNECTOR:%d:%s] probed modes:\n",  in drm_helper_probe_single_connector_modes()
700 		    connector->base.id, connector->name);  in drm_helper_probe_single_connector_modes()
702 	list_for_each_entry(mode, &connector->modes, head) {  in drm_helper_probe_single_connector_modes()
714  * @dev: drm_device whose connector state changed
728  * If only a single connector has changed, consider calling
739  * drm_kms_helper_connector_hotplug_event - fire off a KMS connector hotplug event
740  * @connector: drm_connector which has changed
743  * fine-grained uevent for a single connector.
745 void drm_kms_helper_connector_hotplug_event(struct drm_connector *connector)  in drm_kms_helper_connector_hotplug_event()  argument
747 	struct drm_device *dev = connector->dev;  in drm_kms_helper_connector_hotplug_event()
749 	drm_sysfs_connector_hotplug_event(connector);  in drm_kms_helper_connector_hotplug_event()
758 	struct drm_connector *connector;  in output_poll_execute()  local
785 	drm_for_each_connector_iter(connector, &conn_iter) {  in output_poll_execute()
787 		if (connector->force)  in output_poll_execute()
792 		if (!connector->polled || connector->polled == DRM_CONNECTOR_POLL_HPD)  in output_poll_execute()
795 		old_status = connector->status;  in output_poll_execute()
799 		    !(connector->polled & DRM_CONNECTOR_POLL_DISCONNECT))  in output_poll_execute()
804 		old_epoch_counter = connector->epoch_counter;  in output_poll_execute()
805 		connector->status = drm_helper_probe_detect(connector, NULL, false);  in output_poll_execute()
806 		if (old_epoch_counter != connector->epoch_counter) {  in output_poll_execute()
822 			if (connector->status == connector_status_unknown) {  in output_poll_execute()
823 				connector->status = old_status;  in output_poll_execute()
828 			new = drm_get_connector_status_name(connector->status);  in output_poll_execute()
830 			drm_dbg_kms(dev, "[CONNECTOR:%d:%s] status updated from %s to %s\n",  in output_poll_execute()
831 				    connector->base.id, connector->name,  in output_poll_execute()
833 			drm_dbg_kms(dev, "[CONNECTOR:%d:%s] epoch counter %llu -> %llu\n",  in output_poll_execute()
834 				    connector->base.id, connector->name,  in output_poll_execute()
835 				    old_epoch_counter, connector->epoch_counter);  in output_poll_execute()
862  * connector ->detect hook.
919  * Note that a connector can be both polled and probed from the hotplug handler,
972 static bool check_connector_changed(struct drm_connector *connector)  in check_connector_changed()  argument
974 	struct drm_device *dev = connector->dev;  in check_connector_changed()
979 	drm_WARN_ON(dev, !(connector->polled & DRM_CONNECTOR_POLL_HPD));  in check_connector_changed()
983 	old_status = connector->status;  in check_connector_changed()
984 	old_epoch_counter = connector->epoch_counter;  in check_connector_changed()
985 	connector->status = drm_helper_probe_detect(connector, NULL, false);  in check_connector_changed()
987 	if (old_epoch_counter == connector->epoch_counter) {  in check_connector_changed()
988 		drm_dbg_kms(dev, "[CONNECTOR:%d:%s] Same epoch counter %llu\n",  in check_connector_changed()
989 			    connector->base.id,  in check_connector_changed()
990 			    connector->name,  in check_connector_changed()
991 			    connector->epoch_counter);  in check_connector_changed()
996 	drm_dbg_kms(dev, "[CONNECTOR:%d:%s] status updated from %s to %s\n",  in check_connector_changed()
997 		    connector->base.id,  in check_connector_changed()
998 		    connector->name,  in check_connector_changed()
1000 		    drm_get_connector_status_name(connector->status));  in check_connector_changed()
1002 	drm_dbg_kms(dev, "[CONNECTOR:%d:%s] Changed epoch counter %llu => %llu\n",  in check_connector_changed()
1003 		    connector->base.id,  in check_connector_changed()
1004 		    connector->name,  in check_connector_changed()
1006 		    connector->epoch_counter);  in check_connector_changed()
1013  * @connector: drm_connector
1015  * Drivers can use this helper function to run a detect cycle on a connector
1019  * interrupts for a single connector. Drivers that want to send a
1021  * per connector need to use drm_helper_hpd_irq_event().
1026  * Note that a connector can be both polled and probed from the hotplug
1030  * A boolean indicating whether the connector status changed or not
1032 bool drm_connector_helper_hpd_irq_event(struct drm_connector *connector)  in drm_connector_helper_hpd_irq_event()  argument
1034 	struct drm_device *dev = connector->dev;  in drm_connector_helper_hpd_irq_event()
1038 	changed = check_connector_changed(connector);  in drm_connector_helper_hpd_irq_event()
1042 		drm_kms_helper_connector_hotplug_event(connector);  in drm_connector_helper_hpd_irq_event()
1043 		drm_dbg_kms(dev, "[CONNECTOR:%d:%s] Sent hotplug event\n",  in drm_connector_helper_hpd_irq_event()
1044 			    connector->base.id,  in drm_connector_helper_hpd_irq_event()
1045 			    connector->name);  in drm_connector_helper_hpd_irq_event()
1062  * interrupts for each connector.
1064  * Drivers which support hotplug interrupts for each connector individually and
1067  * code and directly call drm_kms_helper_hotplug_event() in case the connector
1073  * Note that a connector can be both polled and probed from the hotplug handler,
1077  * A boolean indicating whether the connector status changed or not
1081 	struct drm_connector *connector, *first_changed_connector = NULL;  in drm_helper_hpd_irq_event()  local
1090 	drm_for_each_connector_iter(connector, &conn_iter) {  in drm_helper_hpd_irq_event()
1092 		if (!(connector->polled & DRM_CONNECTOR_POLL_HPD))  in drm_helper_hpd_irq_event()
1095 		if (check_connector_changed(connector)) {  in drm_helper_hpd_irq_event()
1097 				drm_connector_get(connector);  in drm_helper_hpd_irq_event()
1098 				first_changed_connector = connector;  in drm_helper_hpd_irq_event()
1144  * drm_connector_helper_get_modes_fixed - Duplicates a display mode for a connector
1145  * @connector: the connector
1148  * This function duplicates a display modes for a connector. Drivers for hardware
1149  * that only supports a single fixed mode can use this function in their connector's
1155 int drm_connector_helper_get_modes_fixed(struct drm_connector *connector,  in drm_connector_helper_get_modes_fixed()  argument
1158 	struct drm_device *dev = connector->dev;  in drm_connector_helper_get_modes_fixed()
1172 	drm_mode_probed_add(connector, mode);  in drm_connector_helper_get_modes_fixed()
1175 		connector->display_info.width_mm = mode->width_mm;  in drm_connector_helper_get_modes_fixed()
1177 		connector->display_info.height_mm = mode->height_mm;  in drm_connector_helper_get_modes_fixed()
1184  * drm_connector_helper_get_modes - Read EDID and update connector.
1185  * @connector: The connector
1187  * Read the EDID using drm_edid_read() (which requires that connector->ddc is
1188  * set), and update the connector using the EDID.
1190  * This can be used as the "default" connector helper .get_modes() hook if the
1192  * custom .get_modes() hooks should do regarding EDID read and connector update.
1196 int drm_connector_helper_get_modes(struct drm_connector *connector)  in drm_connector_helper_get_modes()  argument
1201 	drm_edid = drm_edid_read(connector);  in drm_connector_helper_get_modes()
1204 	 * Unconditionally update the connector. If the EDID was read  in drm_connector_helper_get_modes()
1205 	 * successfully, fill in the connector information derived from the  in drm_connector_helper_get_modes()
1206 	 * EDID. Otherwise, if the EDID is NULL, clear the connector  in drm_connector_helper_get_modes()
1209 	drm_edid_connector_update(connector, drm_edid);  in drm_connector_helper_get_modes()
1211 	count = drm_edid_connector_add_modes(connector);  in drm_connector_helper_get_modes()
1220  * drm_connector_helper_tv_get_modes - Fills the modes availables to a TV connector
1221  * @connector: The connector
1223  * Fills the available modes for a TV connector based on the supported
1226  * This can be used as the default TV connector helper .get_modes() hook
1230  * The number of modes added to the connector.
1232 int drm_connector_helper_tv_get_modes(struct drm_connector *connector)  in drm_connector_helper_tv_get_modes()  argument
1234 	struct drm_device *dev = connector->dev;  in drm_connector_helper_tv_get_modes()
1237 	struct drm_cmdline_mode *cmdline = &connector->cmdline_mode;  in drm_connector_helper_tv_get_modes()
1259 		if (drm_object_property_get_default_value(&connector->base,  in drm_connector_helper_tv_get_modes()
1295 		drm_mode_probed_add(connector, mode);  in drm_connector_helper_tv_get_modes()
1303  * drm_connector_helper_detect_from_ddc - Read EDID and detect connector status.
1304  * @connector: The connector
1308  * Detects the connector status by reading the EDID using drm_probe_ddc(),
1309  * which requires connector->ddc to be set. Returns connector_status_connected
1313  * The connector status as defined by enum drm_connector_status.
1315 int drm_connector_helper_detect_from_ddc(struct drm_connector *connector,  in drm_connector_helper_detect_from_ddc()  argument
1319 	struct i2c_adapter *ddc = connector->ddc;  in drm_connector_helper_detect_from_ddc()