81 void backlight_notify_blank(struct backlight_device *bd, struct device *display_dev,  in backlight_notify_blank()  argument
84 	guard(mutex)(&bd->ops_lock);  in backlight_notify_blank()
86 	if (!bd->ops)  in backlight_notify_blank()
88 	if (bd->ops->controls_device && !bd->ops->controls_device(bd, display_dev))  in backlight_notify_blank()
91 	if (fb_on && (!prev_fb_on || !bd->use_count)) {  in backlight_notify_blank()
92 		if (!bd->use_count++) {  in backlight_notify_blank()
93 			bd->props.state &= ~BL_CORE_FBBLANK;  in backlight_notify_blank()
94 			backlight_update_status(bd);  in backlight_notify_blank()
96 	} else if (!fb_on && prev_fb_on && bd->use_count) {  in backlight_notify_blank()
97 		if (!(--bd->use_count)) {  in backlight_notify_blank()
98 			bd->props.state |= BL_CORE_FBBLANK;  in backlight_notify_blank()
99 			backlight_update_status(bd);  in backlight_notify_blank()
107 	struct backlight_device *bd;  in backlight_notify_blank_all()  local
111 	list_for_each_entry(bd, &backlight_dev_list, entry)  in backlight_notify_blank_all()
112 		backlight_notify_blank(bd, display_dev, fb_on, prev_fb_on);  in backlight_notify_blank_all()
116 static void backlight_generate_event(struct backlight_device *bd,  in backlight_generate_event()  argument
133 	kobject_uevent_env(&bd->dev.kobj, KOBJ_CHANGE, envp);  in backlight_generate_event()
134 	sysfs_notify(&bd->dev.kobj, NULL, "actual_brightness");  in backlight_generate_event()
140 	struct backlight_device *bd = to_backlight_device(dev);  in bl_power_show()  local
142 	return sprintf(buf, "%d\n", bd->props.power);  in bl_power_show()
149 	struct backlight_device *bd = to_backlight_device(dev);  in bl_power_store()  local
157 	mutex_lock(&bd->ops_lock);  in bl_power_store()
158 	if (bd->ops) {  in bl_power_store()
160 		if (bd->props.power != power) {  in bl_power_store()
161 			old_power = bd->props.power;  in bl_power_store()
162 			bd->props.power = power;  in bl_power_store()
163 			rc = backlight_update_status(bd);  in bl_power_store()
165 				bd->props.power = old_power;  in bl_power_store()
172 	mutex_unlock(&bd->ops_lock);  in bl_power_store()
181 	struct backlight_device *bd = to_backlight_device(dev);  in brightness_show()  local
183 	return sprintf(buf, "%d\n", bd->props.brightness);  in brightness_show()
186 int backlight_device_set_brightness(struct backlight_device *bd,  in backlight_device_set_brightness()  argument
191 	mutex_lock(&bd->ops_lock);  in backlight_device_set_brightness()
192 	if (bd->ops) {  in backlight_device_set_brightness()
193 		if (brightness > bd->props.max_brightness)  in backlight_device_set_brightness()
197 			bd->props.brightness = brightness;  in backlight_device_set_brightness()
198 			rc = backlight_update_status(bd);  in backlight_device_set_brightness()
201 	mutex_unlock(&bd->ops_lock);  in backlight_device_set_brightness()
203 	backlight_generate_event(bd, BACKLIGHT_UPDATE_SYSFS);  in backlight_device_set_brightness()
213 	struct backlight_device *bd = to_backlight_device(dev);  in brightness_store()  local
220 	rc = backlight_device_set_brightness(bd, brightness);  in brightness_store()
229 	struct backlight_device *bd = to_backlight_device(dev);  in type_show()  local
231 	return sprintf(buf, "%s\n", backlight_types[bd->props.type]);  in type_show()
238 	struct backlight_device *bd = to_backlight_device(dev);  in max_brightness_show()  local
240 	return sprintf(buf, "%d\n", bd->props.max_brightness);  in max_brightness_show()
248 	struct backlight_device *bd = to_backlight_device(dev);  in actual_brightness_show()  local
250 	mutex_lock(&bd->ops_lock);  in actual_brightness_show()
251 	if (bd->ops && bd->ops->get_brightness) {  in actual_brightness_show()
252 		rc = bd->ops->get_brightness(bd);  in actual_brightness_show()
256 		rc = sprintf(buf, "%d\n", bd->props.brightness);  in actual_brightness_show()
258 	mutex_unlock(&bd->ops_lock);  in actual_brightness_show()
267 	struct backlight_device *bd = to_backlight_device(dev);  in scale_show()  local
269 	if (WARN_ON(bd->props.scale > BACKLIGHT_SCALE_NON_LINEAR))  in scale_show()
272 	return sprintf(buf, "%s\n", backlight_scale_types[bd->props.scale]);  in scale_show()
279 	struct backlight_device *bd = to_backlight_device(dev);  in backlight_suspend()  local
281 	mutex_lock(&bd->ops_lock);  in backlight_suspend()
282 	if (bd->ops && bd->ops->options & BL_CORE_SUSPENDRESUME) {  in backlight_suspend()
283 		bd->props.state |= BL_CORE_SUSPENDED;  in backlight_suspend()
284 		backlight_update_status(bd);  in backlight_suspend()
286 	mutex_unlock(&bd->ops_lock);  in backlight_suspend()
293 	struct backlight_device *bd = to_backlight_device(dev);  in backlight_resume()  local
295 	mutex_lock(&bd->ops_lock);  in backlight_resume()
296 	if (bd->ops && bd->ops->options & BL_CORE_SUSPENDRESUME) {  in backlight_resume()
297 		bd->props.state &= ~BL_CORE_SUSPENDED;  in backlight_resume()
298 		backlight_update_status(bd);  in backlight_resume()
300 	mutex_unlock(&bd->ops_lock);  in backlight_resume()
311 	struct backlight_device *bd = to_backlight_device(dev);  in bl_device_release()  local
312 	kfree(bd);  in bl_device_release()
335  * @bd: the backlight device to update
344 void backlight_force_update(struct backlight_device *bd,  in backlight_force_update()  argument
349 	mutex_lock(&bd->ops_lock);  in backlight_force_update()
350 	if (bd->ops && bd->ops->get_brightness) {  in backlight_force_update()
351 		brightness = bd->ops->get_brightness(bd);  in backlight_force_update()
353 			bd->props.brightness = brightness;  in backlight_force_update()
355 			dev_err(&bd->dev,  in backlight_force_update()
359 	mutex_unlock(&bd->ops_lock);  in backlight_force_update()
360 	backlight_generate_event(bd, reason);  in backlight_force_update()
434 	struct backlight_device *bd;  in backlight_device_get_by_type()  local
437 	list_for_each_entry(bd, &backlight_dev_list, entry) {  in backlight_device_get_by_type()
438 		if (bd->props.type == type) {  in backlight_device_get_by_type()
445 	return found ? bd : NULL;  in backlight_device_get_by_type()
471 void backlight_device_unregister(struct backlight_device *bd)  in backlight_device_unregister()  argument
473 	if (!bd)  in backlight_device_unregister()
477 	list_del(&bd->entry);  in backlight_device_unregister()
482 	if (pmac_backlight == bd)  in backlight_device_unregister()
487 	mutex_lock(&bd->ops_lock);  in backlight_device_unregister()
488 	bd->ops = NULL;  in backlight_device_unregister()
489 	mutex_unlock(&bd->ops_lock);  in backlight_device_unregister()
491 	device_unregister(&bd->dev);  in backlight_device_unregister()
555  * @bd: the backlight device to unregister
562 				struct backlight_device *bd)  in devm_backlight_device_unregister()  argument
567 				devm_backlight_device_match, bd);  in devm_backlight_device_unregister()
603 	struct backlight_device *bd = NULL;  in of_find_backlight()  local
612 			bd = of_find_backlight_by_node(np);  in of_find_backlight()
614 			if (!bd)  in of_find_backlight()
619 	return bd;  in of_find_backlight()
624 	struct backlight_device *bd = data;  in devm_backlight_release()  local
626 	put_device(&bd->dev);  in devm_backlight_release()
646 	struct backlight_device *bd;  in devm_of_find_backlight()  local
649 	bd = of_find_backlight(dev);  in devm_of_find_backlight()
650 	if (IS_ERR_OR_NULL(bd))  in devm_of_find_backlight()
651 		return bd;  in devm_of_find_backlight()
652 	ret = devm_add_action_or_reset(dev, devm_backlight_release, bd);  in devm_of_find_backlight()
656 	return bd;  in devm_of_find_backlight()