158 static int _ps8640_wait_hpd_asserted(struct ps8640 *ps_bridge, unsigned long wait_us)  in _ps8640_wait_hpd_asserted()  argument
160 	struct regmap *map = ps_bridge->regmap[PAGE2_TOP_CNTL];  in _ps8640_wait_hpd_asserted()
181 	if (!ret && ps_bridge->need_post_hpd_delay) {  in _ps8640_wait_hpd_asserted()
182 		ps_bridge->need_post_hpd_delay = false;  in _ps8640_wait_hpd_asserted()
191 	struct ps8640 *ps_bridge = aux_to_ps8640(aux);  in ps8640_wait_hpd_asserted()  local
192 	struct device *dev = &ps_bridge->page[PAGE0_DP_CNTL]->dev;  in ps8640_wait_hpd_asserted()
201 	ret = _ps8640_wait_hpd_asserted(ps_bridge, wait_us);  in ps8640_wait_hpd_asserted()
211 	struct ps8640 *ps_bridge = aux_to_ps8640(aux);  in ps8640_aux_transfer_msg()  local
212 	struct regmap *map = ps_bridge->regmap[PAGE0_DP_CNTL];  in ps8640_aux_transfer_msg()
213 	struct device *dev = &ps_bridge->page[PAGE0_DP_CNTL]->dev;  in ps8640_aux_transfer_msg()
345 	struct ps8640 *ps_bridge = aux_to_ps8640(aux);  in ps8640_aux_transfer()  local
346 	struct device *dev = &ps_bridge->page[PAGE0_DP_CNTL]->dev;  in ps8640_aux_transfer()
349 	mutex_lock(&ps_bridge->aux_lock);  in ps8640_aux_transfer()
351 	ret = _ps8640_wait_hpd_asserted(ps_bridge, 200 * 1000);  in ps8640_aux_transfer()
361 	mutex_unlock(&ps_bridge->aux_lock);  in ps8640_aux_transfer()
366 static void ps8640_bridge_vdo_control(struct ps8640 *ps_bridge,  in ps8640_bridge_vdo_control()  argument
369 	struct regmap *map = ps_bridge->regmap[PAGE3_DSI_CNTL1];  in ps8640_bridge_vdo_control()
370 	struct device *dev = &ps_bridge->page[PAGE3_DSI_CNTL1]->dev;  in ps8640_bridge_vdo_control()
384 	struct ps8640 *ps_bridge = dev_get_drvdata(dev);  in ps8640_resume()  local
387 	ret = regulator_bulk_enable(ARRAY_SIZE(ps_bridge->supplies),  in ps8640_resume()
388 				    ps_bridge->supplies);  in ps8640_resume()
394 	gpiod_set_value(ps_bridge->gpio_powerdown, 0);  in ps8640_resume()
395 	gpiod_set_value(ps_bridge->gpio_reset, 1);  in ps8640_resume()
397 	gpiod_set_value(ps_bridge->gpio_reset, 0);  in ps8640_resume()
400 	gpiod_set_value(ps_bridge->gpio_reset, 1);  in ps8640_resume()
402 	gpiod_set_value(ps_bridge->gpio_reset, 0);  in ps8640_resume()
405 	ps_bridge->need_post_hpd_delay = true;  in ps8640_resume()
421 	struct ps8640 *ps_bridge = dev_get_drvdata(dev);  in ps8640_suspend()  local
424 	gpiod_set_value(ps_bridge->gpio_reset, 1);  in ps8640_suspend()
425 	gpiod_set_value(ps_bridge->gpio_powerdown, 1);  in ps8640_suspend()
426 	ret = regulator_bulk_disable(ARRAY_SIZE(ps_bridge->supplies),  in ps8640_suspend()
427 				     ps_bridge->supplies);  in ps8640_suspend()
443 	struct ps8640 *ps_bridge = bridge_to_ps8640(bridge);  in ps8640_atomic_pre_enable()  local
444 	struct regmap *map = ps_bridge->regmap[PAGE2_TOP_CNTL];  in ps8640_atomic_pre_enable()
445 	struct device *dev = &ps_bridge->page[PAGE0_DP_CNTL]->dev;  in ps8640_atomic_pre_enable()
449 	ret = _ps8640_wait_hpd_asserted(ps_bridge, 200 * 1000);  in ps8640_atomic_pre_enable()
470 	ps8640_bridge_vdo_control(ps_bridge, ENABLE);  in ps8640_atomic_pre_enable()
472 	ps_bridge->pre_enabled = true;  in ps8640_atomic_pre_enable()
478 	struct ps8640 *ps_bridge = bridge_to_ps8640(bridge);  in ps8640_atomic_post_disable()  local
480 	ps_bridge->pre_enabled = false;  in ps8640_atomic_post_disable()
482 	ps8640_bridge_vdo_control(ps_bridge, DISABLE);  in ps8640_atomic_post_disable()
490 	mutex_lock(&ps_bridge->aux_lock);  in ps8640_atomic_post_disable()
492 	pm_runtime_put_sync_suspend(&ps_bridge->page[PAGE0_DP_CNTL]->dev);  in ps8640_atomic_post_disable()
494 	mutex_unlock(&ps_bridge->aux_lock);  in ps8640_atomic_post_disable()
500 	struct ps8640 *ps_bridge = bridge_to_ps8640(bridge);  in ps8640_bridge_attach()  local
501 	struct device *dev = &ps_bridge->page[0]->dev;  in ps8640_bridge_attach()
507 	ps_bridge->aux.drm_dev = bridge->dev;  in ps8640_bridge_attach()
508 	ret = drm_dp_aux_register(&ps_bridge->aux);  in ps8640_bridge_attach()
514 	ps_bridge->link = device_link_add(bridge->dev->dev, dev, DL_FLAG_STATELESS);  in ps8640_bridge_attach()
515 	if (!ps_bridge->link) {  in ps8640_bridge_attach()
522 	ret = drm_bridge_attach(bridge->encoder, ps_bridge->panel_bridge,  in ps8640_bridge_attach()
523 				&ps_bridge->bridge, flags);  in ps8640_bridge_attach()
530 	device_link_del(ps_bridge->link);  in ps8640_bridge_attach()
532 	drm_dp_aux_unregister(&ps_bridge->aux);  in ps8640_bridge_attach()
539 	struct ps8640 *ps_bridge = bridge_to_ps8640(bridge);  in ps8640_bridge_detach()  local
541 	drm_dp_aux_unregister(&ps_bridge->aux);  in ps8640_bridge_detach()
542 	if (ps_bridge->link)  in ps8640_bridge_detach()
543 		device_link_del(ps_bridge->link);  in ps8640_bridge_detach()
562 static int ps8640_bridge_get_dsi_resources(struct device *dev, struct ps8640 *ps_bridge)  in ps8640_bridge_get_dsi_resources()  argument
593 	ps_bridge->dsi = dsi;  in ps8640_bridge_get_dsi_resources()
606 	struct ps8640 *ps_bridge = aux_to_ps8640(aux);  in ps8640_bridge_link_panel()  local
621 	ps_bridge->panel_bridge = devm_drm_of_get_bridge(dev, np, 1, 0);  in ps8640_bridge_link_panel()
622 	if (IS_ERR(ps_bridge->panel_bridge))  in ps8640_bridge_link_panel()
623 		return PTR_ERR(ps_bridge->panel_bridge);  in ps8640_bridge_link_panel()
625 	ret = devm_drm_bridge_add(dev, &ps_bridge->bridge);  in ps8640_bridge_link_panel()
629 	return devm_mipi_dsi_attach(dev, ps_bridge->dsi);  in ps8640_bridge_link_panel()
635 	struct ps8640 *ps_bridge;  in ps8640_probe()  local
639 	ps_bridge = devm_kzalloc(dev, sizeof(*ps_bridge), GFP_KERNEL);  in ps8640_probe()
640 	if (!ps_bridge)  in ps8640_probe()
643 	mutex_init(&ps_bridge->aux_lock);  in ps8640_probe()
645 	ps_bridge->supplies[0].supply = "vdd12";  in ps8640_probe()
646 	ps_bridge->supplies[1].supply = "vdd33";  in ps8640_probe()
647 	ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(ps_bridge->supplies),  in ps8640_probe()
648 				      ps_bridge->supplies);  in ps8640_probe()
652 	ps_bridge->gpio_powerdown = devm_gpiod_get(&client->dev, "powerdown",  in ps8640_probe()
654 	if (IS_ERR(ps_bridge->gpio_powerdown))  in ps8640_probe()
655 		return PTR_ERR(ps_bridge->gpio_powerdown);  in ps8640_probe()
660 	ps_bridge->gpio_reset = devm_gpiod_get(&client->dev, "reset",  in ps8640_probe()
662 	if (IS_ERR(ps_bridge->gpio_reset))  in ps8640_probe()
663 		return PTR_ERR(ps_bridge->gpio_reset);  in ps8640_probe()
665 	ps_bridge->bridge.funcs = &ps8640_bridge_funcs;  in ps8640_probe()
666 	ps_bridge->bridge.of_node = dev->of_node;  in ps8640_probe()
667 	ps_bridge->bridge.type = DRM_MODE_CONNECTOR_eDP;  in ps8640_probe()
673 	ret = ps8640_bridge_get_dsi_resources(&client->dev, ps_bridge);  in ps8640_probe()
677 	ps_bridge->page[PAGE0_DP_CNTL] = client;  in ps8640_probe()
679 	ps_bridge->regmap[PAGE0_DP_CNTL] = devm_regmap_init_i2c(client, ps8640_regmap_config);  in ps8640_probe()
680 	if (IS_ERR(ps_bridge->regmap[PAGE0_DP_CNTL]))  in ps8640_probe()
681 		return PTR_ERR(ps_bridge->regmap[PAGE0_DP_CNTL]);  in ps8640_probe()
683 	for (i = 1; i < ARRAY_SIZE(ps_bridge->page); i++) {  in ps8640_probe()
684 		ps_bridge->page[i] = devm_i2c_new_dummy_device(&client->dev,  in ps8640_probe()
687 		if (IS_ERR(ps_bridge->page[i]))  in ps8640_probe()
688 			return PTR_ERR(ps_bridge->page[i]);  in ps8640_probe()
690 		ps_bridge->regmap[i] = devm_regmap_init_i2c(ps_bridge->page[i],  in ps8640_probe()
692 		if (IS_ERR(ps_bridge->regmap[i]))  in ps8640_probe()
693 			return PTR_ERR(ps_bridge->regmap[i]);  in ps8640_probe()
696 	i2c_set_clientdata(client, ps_bridge);  in ps8640_probe()
698 	ps_bridge->aux.name = "parade-ps8640-aux";  in ps8640_probe()
699 	ps_bridge->aux.dev = dev;  in ps8640_probe()
700 	ps_bridge->aux.transfer = ps8640_aux_transfer;  in ps8640_probe()
701 	ps_bridge->aux.wait_hpd_asserted = ps8640_wait_hpd_asserted;  in ps8640_probe()
702 	drm_dp_aux_init(&ps_bridge->aux);  in ps8640_probe()
720 	ret = devm_of_dp_aux_populate_bus(&ps_bridge->aux, ps8640_bridge_link_panel);  in ps8640_probe()
728 		return ps8640_bridge_link_panel(&ps_bridge->aux);  in ps8640_probe()