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()
245 	struct drm_connector *connector;  in drm_kms_helper_poll_enable()  local
253 	drm_for_each_connector_iter(connector, &conn_iter) {  in drm_kms_helper_poll_enable()
254 		if (connector->polled & (DRM_CONNECTOR_POLL_CONNECT |  in drm_kms_helper_poll_enable()
281 drm_helper_probe_detect_ctx(struct drm_connector *connector, bool force)  in drm_helper_probe_detect_ctx()  argument
283 	const struct drm_connector_helper_funcs *funcs = connector->helper_private;  in drm_helper_probe_detect_ctx()
290 	ret = drm_modeset_lock(&connector->dev->mode_config.connection_mutex, &ctx);  in drm_helper_probe_detect_ctx()
293 			ret = funcs->detect_ctx(connector, &ctx, force);  in drm_helper_probe_detect_ctx()
294 		else if (connector->funcs->detect)  in drm_helper_probe_detect_ctx()
295 			ret = connector->funcs->detect(connector, force);  in drm_helper_probe_detect_ctx()
308 	if (ret != connector->status)  in drm_helper_probe_detect_ctx()
309 		connector->epoch_counter += 1;  in drm_helper_probe_detect_ctx()
318  * drm_helper_probe_detect - probe connector status
319  * @connector: connector to probe
323  * This function calls the detect callbacks of the connector.
328 drm_helper_probe_detect(struct drm_connector *connector,  in drm_helper_probe_detect()  argument
332 	const struct drm_connector_helper_funcs *funcs = connector->helper_private;  in drm_helper_probe_detect()
333 	struct drm_device *dev = connector->dev;  in drm_helper_probe_detect()
337 		return drm_helper_probe_detect_ctx(connector, force);  in drm_helper_probe_detect()
344 		ret = funcs->detect_ctx(connector, ctx, force);  in drm_helper_probe_detect()
345 	else if (connector->funcs->detect)  in drm_helper_probe_detect()
346 		ret = connector->funcs->detect(connector, force);  in drm_helper_probe_detect()
350 	if (ret != connector->status)  in drm_helper_probe_detect()
351 		connector->epoch_counter += 1;  in drm_helper_probe_detect()
357 static int drm_helper_probe_get_modes(struct drm_connector *connector)  in drm_helper_probe_get_modes()  argument
360 		connector->helper_private;  in drm_helper_probe_get_modes()
363 	count = connector_funcs->get_modes(connector);  in drm_helper_probe_get_modes()
369 	if (count == 0 && connector->status == connector_status_connected)  in drm_helper_probe_get_modes()
370 		count = drm_add_override_edid_modes(connector);  in drm_helper_probe_get_modes()
375 static int __drm_helper_update_and_validate(struct drm_connector *connector,  in __drm_helper_update_and_validate()  argument
379 	struct drm_device *dev = connector->dev;  in __drm_helper_update_and_validate()
384 	drm_connector_list_update(connector);  in __drm_helper_update_and_validate()
386 	if (connector->interlace_allowed)  in __drm_helper_update_and_validate()
388 	if (connector->doublescan_allowed)  in __drm_helper_update_and_validate()
390 	if (connector->stereo_allowed)  in __drm_helper_update_and_validate()
393 	list_for_each_entry(mode, &connector->modes, head) {  in __drm_helper_update_and_validate()
409 		ret = drm_mode_validate_pipeline(mode, connector, ctx,  in __drm_helper_update_and_validate()
424 		mode->status = drm_mode_validate_ycbcr420(mode, connector);  in __drm_helper_update_and_validate()
432  * @connector: connector to probe
436  * Based on the helper callbacks implemented by @connector in struct
438  * be added to the connector's probed_modes list, then culled (based on validity
447  * 1. All modes currently on the connector's modes list are marked as stale
449  * 2. New modes are added to the connector's probed_modes list with
454  *    - if the connector status is connector_status_connected, standard
472  *    - drm_mode_validate_flag() checks the modes against basic connector
482  * 5. Any mode whose status is not OK is pruned from the connector's modes list,
487  * The number of modes found on @connector.
489 int drm_helper_probe_single_connector_modes(struct drm_connector *connector,  in drm_helper_probe_single_connector_modes()  argument
492 	struct drm_device *dev = connector->dev;  in drm_helper_probe_single_connector_modes()
502 	DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", connector->base.id,  in drm_helper_probe_single_connector_modes()
503 			connector->name);  in drm_helper_probe_single_connector_modes()
514 	list_for_each_entry(mode, &connector->modes, head)  in drm_helper_probe_single_connector_modes()
517 	old_status = connector->status;  in drm_helper_probe_single_connector_modes()
519 	if (connector->force) {  in drm_helper_probe_single_connector_modes()
520 		if (connector->force == DRM_FORCE_ON ||  in drm_helper_probe_single_connector_modes()
521 		    connector->force == DRM_FORCE_ON_DIGITAL)  in drm_helper_probe_single_connector_modes()
522 			connector->status = connector_status_connected;  in drm_helper_probe_single_connector_modes()
524 			connector->status = connector_status_disconnected;  in drm_helper_probe_single_connector_modes()
525 		if (connector->funcs->force)  in drm_helper_probe_single_connector_modes()
526 			connector->funcs->force(connector);  in drm_helper_probe_single_connector_modes()
528 		ret = drm_helper_probe_detect(connector, &ctx, true);  in drm_helper_probe_single_connector_modes()
533 		} else if (WARN(ret < 0, "Invalid return value %i for connector detection\n", ret))  in drm_helper_probe_single_connector_modes()
536 		connector->status = ret;  in drm_helper_probe_single_connector_modes()
545 	if (old_status != connector->status) {  in drm_helper_probe_single_connector_modes()
546 		DRM_DEBUG_KMS("[CONNECTOR:%d:%s] status updated from %s to %s\n",  in drm_helper_probe_single_connector_modes()
547 			      connector->base.id,  in drm_helper_probe_single_connector_modes()
548 			      connector->name,  in drm_helper_probe_single_connector_modes()
550 			      drm_get_connector_status_name(connector->status));  in drm_helper_probe_single_connector_modes()
570 	if (connector->status == connector_status_disconnected) {  in drm_helper_probe_single_connector_modes()
571 		DRM_DEBUG_KMS("[CONNECTOR:%d:%s] disconnected\n",  in drm_helper_probe_single_connector_modes()
572 			connector->base.id, connector->name);  in drm_helper_probe_single_connector_modes()
573 		drm_connector_update_edid_property(connector, NULL);  in drm_helper_probe_single_connector_modes()
574 		drm_mode_prune_invalid(dev, &connector->modes, false);  in drm_helper_probe_single_connector_modes()
578 	count = drm_helper_probe_get_modes(connector);  in drm_helper_probe_single_connector_modes()
580 	if (count == 0 && (connector->status == connector_status_connected ||  in drm_helper_probe_single_connector_modes()
581 			   connector->status == connector_status_unknown)) {  in drm_helper_probe_single_connector_modes()
582 		count = drm_add_modes_noedid(connector, 1024, 768);  in drm_helper_probe_single_connector_modes()
589 		if (connector->connector_type == DRM_MODE_CONNECTOR_DisplayPort)  in drm_helper_probe_single_connector_modes()
590 			drm_set_preferred_mode(connector, 640, 480);  in drm_helper_probe_single_connector_modes()
592 	count += drm_helper_probe_add_cmdline_mode(connector);  in drm_helper_probe_single_connector_modes()
594 		ret = __drm_helper_update_and_validate(connector, maxX, maxY, &ctx);  in drm_helper_probe_single_connector_modes()
601 	drm_mode_prune_invalid(dev, &connector->modes, true);  in drm_helper_probe_single_connector_modes()
610 	if (list_empty(&connector->modes) &&  in drm_helper_probe_single_connector_modes()
611 	    connector->connector_type == DRM_MODE_CONNECTOR_DisplayPort) {  in drm_helper_probe_single_connector_modes()
612 		count = drm_add_modes_noedid(connector, 640, 480);  in drm_helper_probe_single_connector_modes()
613 		ret = __drm_helper_update_and_validate(connector, maxX, maxY, &ctx);  in drm_helper_probe_single_connector_modes()
618 		drm_mode_prune_invalid(dev, &connector->modes, true);  in drm_helper_probe_single_connector_modes()
625 	if (list_empty(&connector->modes))  in drm_helper_probe_single_connector_modes()
628 	drm_mode_sort(&connector->modes);  in drm_helper_probe_single_connector_modes()
630 	DRM_DEBUG_KMS("[CONNECTOR:%d:%s] probed modes :\n", connector->base.id,  in drm_helper_probe_single_connector_modes()
631 			connector->name);  in drm_helper_probe_single_connector_modes()
632 	list_for_each_entry(mode, &connector->modes, head) {  in drm_helper_probe_single_connector_modes()
643  * @dev: drm_device whose connector state changed
657  * If only a single connector has changed, consider calling
672  * drm_kms_helper_connector_hotplug_event - fire off a KMS connector hotplug event
673  * @connector: drm_connector which has changed
676  * fine-grained uevent for a single connector.
678 void drm_kms_helper_connector_hotplug_event(struct drm_connector *connector)  in drm_kms_helper_connector_hotplug_event()  argument
680 	struct drm_device *dev = connector->dev;  in drm_kms_helper_connector_hotplug_event()
683 	drm_sysfs_connector_hotplug_event(connector);  in drm_kms_helper_connector_hotplug_event()
695 	struct drm_connector *connector;  in output_poll_execute()  local
717 	drm_for_each_connector_iter(connector, &conn_iter) {  in output_poll_execute()
719 		if (connector->force)  in output_poll_execute()
724 		if (!connector->polled || connector->polled == DRM_CONNECTOR_POLL_HPD)  in output_poll_execute()
727 		old_status = connector->status;  in output_poll_execute()
731 		    !(connector->polled & DRM_CONNECTOR_POLL_DISCONNECT))  in output_poll_execute()
736 		old_epoch_counter = connector->epoch_counter;  in output_poll_execute()
737 		connector->status = drm_helper_probe_detect(connector, NULL, false);  in output_poll_execute()
738 		if (old_epoch_counter != connector->epoch_counter) {  in output_poll_execute()
754 			if (connector->status == connector_status_unknown) {  in output_poll_execute()
755 				connector->status = old_status;  in output_poll_execute()
760 			new = drm_get_connector_status_name(connector->status);  in output_poll_execute()
762 			DRM_DEBUG_KMS("[CONNECTOR:%d:%s] "  in output_poll_execute()
764 				      connector->base.id,  in output_poll_execute()
765 				      connector->name,  in output_poll_execute()
767 			DRM_DEBUG_KMS("[CONNECTOR:%d:%s] epoch counter %llu -> %llu\n",  in output_poll_execute()
768 				      connector->base.id, connector->name,  in output_poll_execute()
769 				      old_epoch_counter, connector->epoch_counter);  in output_poll_execute()
796  * connector ->detect hook.
844  * Note that a connector can be both polled and probed from the hotplug handler,
870 static bool check_connector_changed(struct drm_connector *connector)  in check_connector_changed()  argument
872 	struct drm_device *dev = connector->dev;  in check_connector_changed()
877 	drm_WARN_ON(dev, !(connector->polled & DRM_CONNECTOR_POLL_HPD));  in check_connector_changed()
881 	old_status = connector->status;  in check_connector_changed()
882 	old_epoch_counter = connector->epoch_counter;  in check_connector_changed()
883 	connector->status = drm_helper_probe_detect(connector, NULL, false);  in check_connector_changed()
885 	if (old_epoch_counter == connector->epoch_counter) {  in check_connector_changed()
886 		drm_dbg_kms(dev, "[CONNECTOR:%d:%s] Same epoch counter %llu\n",  in check_connector_changed()
887 			    connector->base.id,  in check_connector_changed()
888 			    connector->name,  in check_connector_changed()
889 			    connector->epoch_counter);  in check_connector_changed()
894 	drm_dbg_kms(dev, "[CONNECTOR:%d:%s] status updated from %s to %s\n",  in check_connector_changed()
895 		    connector->base.id,  in check_connector_changed()
896 		    connector->name,  in check_connector_changed()
898 		    drm_get_connector_status_name(connector->status));  in check_connector_changed()
900 	drm_dbg_kms(dev, "[CONNECTOR:%d:%s] Changed epoch counter %llu => %llu\n",  in check_connector_changed()
901 		    connector->base.id,  in check_connector_changed()
902 		    connector->name,  in check_connector_changed()
904 		    connector->epoch_counter);  in check_connector_changed()
911  * @connector: drm_connector
913  * Drivers can use this helper function to run a detect cycle on a connector
917  * interrupts for a single connector. Drivers that want to send a
919  * per connector need to use drm_helper_hpd_irq_event().
924  * Note that a connector can be both polled and probed from the hotplug
928  * A boolean indicating whether the connector status changed or not
930 bool drm_connector_helper_hpd_irq_event(struct drm_connector *connector)  in drm_connector_helper_hpd_irq_event()  argument
932 	struct drm_device *dev = connector->dev;  in drm_connector_helper_hpd_irq_event()
936 	changed = check_connector_changed(connector);  in drm_connector_helper_hpd_irq_event()
940 		drm_kms_helper_connector_hotplug_event(connector);  in drm_connector_helper_hpd_irq_event()
941 		drm_dbg_kms(dev, "[CONNECTOR:%d:%s] Sent hotplug event\n",  in drm_connector_helper_hpd_irq_event()
942 			    connector->base.id,  in drm_connector_helper_hpd_irq_event()
943 			    connector->name);  in drm_connector_helper_hpd_irq_event()
960  * interrupts for each connector.
962  * Drivers which support hotplug interrupts for each connector individually and
965  * code and directly call drm_kms_helper_hotplug_event() in case the connector
971  * Note that a connector can be both polled and probed from the hotplug handler,
975  * A boolean indicating whether the connector status changed or not
979 	struct drm_connector *connector, *first_changed_connector = NULL;  in drm_helper_hpd_irq_event()  local
988 	drm_for_each_connector_iter(connector, &conn_iter) {  in drm_helper_hpd_irq_event()
990 		if (!(connector->polled & DRM_CONNECTOR_POLL_HPD))  in drm_helper_hpd_irq_event()
993 		if (check_connector_changed(connector)) {  in drm_helper_hpd_irq_event()
995 				drm_connector_get(connector);  in drm_helper_hpd_irq_event()
996 				first_changed_connector = connector;  in drm_helper_hpd_irq_event()
1042  * drm_connector_helper_get_modes_from_ddc - Updates the connector's EDID
1043  *                                           property from the connector's
1045  * @connector: The connector
1050  * Uses a connector's DDC channel to retrieve EDID data and update the
1051  * connector's EDID property and display modes. Drivers can use this
1055 int drm_connector_helper_get_modes_from_ddc(struct drm_connector *connector)  in drm_connector_helper_get_modes_from_ddc()  argument
1060 	if (!connector->ddc)  in drm_connector_helper_get_modes_from_ddc()
1063 	edid = drm_get_edid(connector, connector->ddc);  in drm_connector_helper_get_modes_from_ddc()
1066 	drm_connector_update_edid_property(connector, edid);  in drm_connector_helper_get_modes_from_ddc()
1069 		count = drm_add_edid_modes(connector, edid);  in drm_connector_helper_get_modes_from_ddc()
1078  * drm_connector_helper_get_modes_fixed - Duplicates a display mode for a connector
1079  * @connector: the connector
1082  * This function duplicates a display modes for a connector. Drivers for hardware
1083  * that only supports a single fixed mode can use this function in their connector's
1089 int drm_connector_helper_get_modes_fixed(struct drm_connector *connector,  in drm_connector_helper_get_modes_fixed()  argument
1092 	struct drm_device *dev = connector->dev;  in drm_connector_helper_get_modes_fixed()
1106 	drm_mode_probed_add(connector, mode);  in drm_connector_helper_get_modes_fixed()
1109 		connector->display_info.width_mm = mode->width_mm;  in drm_connector_helper_get_modes_fixed()
1111 		connector->display_info.height_mm = mode->height_mm;  in drm_connector_helper_get_modes_fixed()
1118  * drm_connector_helper_get_modes - Read EDID and update connector.
1119  * @connector: The connector
1121  * Read the EDID using drm_edid_read() (which requires that connector->ddc is
1122  * set), and update the connector using the EDID.
1124  * This can be used as the "default" connector helper .get_modes() hook if the
1126  * custom .get_modes() hooks should do regarding EDID read and connector update.
1130 int drm_connector_helper_get_modes(struct drm_connector *connector)  in drm_connector_helper_get_modes()  argument
1135 	drm_edid = drm_edid_read(connector);  in drm_connector_helper_get_modes()
1138 	 * Unconditionally update the connector. If the EDID was read  in drm_connector_helper_get_modes()
1139 	 * successfully, fill in the connector information derived from the  in drm_connector_helper_get_modes()
1140 	 * EDID. Otherwise, if the EDID is NULL, clear the connector  in drm_connector_helper_get_modes()
1143 	count = drm_edid_connector_update(connector, drm_edid);  in drm_connector_helper_get_modes()