1 // SPDX-License-Identifier: GPL-2.0-only
159 	struct regmap *map = ps_bridge->regmap[PAGE2_TOP_CNTL];  in _ps8640_wait_hpd_asserted()
180 	if (!ret && ps_bridge->need_post_hpd_delay) {  in _ps8640_wait_hpd_asserted()
181 		ps_bridge->need_post_hpd_delay = false;  in _ps8640_wait_hpd_asserted()
191 	struct device *dev = &ps_bridge->page[PAGE0_DP_CNTL]->dev;  in ps8640_wait_hpd_asserted()
211 	struct regmap *map = ps_bridge->regmap[PAGE0_DP_CNTL];  in ps8640_aux_transfer_msg()
212 	struct device *dev = &ps_bridge->page[PAGE0_DP_CNTL]->dev;  in ps8640_aux_transfer_msg()
213 	unsigned int len = msg->size;  in ps8640_aux_transfer_msg()
217 	u8 request = msg->request &  in ps8640_aux_transfer_msg()
219 	u8 *buf = msg->buffer;  in ps8640_aux_transfer_msg()
220 	u8 addr_len[PAGE0_SWAUX_LENGTH + 1 - PAGE0_SWAUX_ADDR_7_0];  in ps8640_aux_transfer_msg()
225 		return -EINVAL;  in ps8640_aux_transfer_msg()
227 	if (msg->address & ~SWAUX_ADDR_MASK)  in ps8640_aux_transfer_msg()
228 		return -EINVAL;  in ps8640_aux_transfer_msg()
239 		return -EINVAL;  in ps8640_aux_transfer_msg()
250 	msg->reply = 0;  in ps8640_aux_transfer_msg()
253 	addr_len[PAGE0_SWAUX_ADDR_7_0 - base] = msg->address;  in ps8640_aux_transfer_msg()
254 	addr_len[PAGE0_SWAUX_ADDR_15_8 - base] = msg->address >> 8;  in ps8640_aux_transfer_msg()
255 	addr_len[PAGE0_SWAUX_ADDR_23_16 - base] = (msg->address >> 16) |  in ps8640_aux_transfer_msg()
256 						  (msg->request << 4);  in ps8640_aux_transfer_msg()
257 	addr_len[PAGE0_SWAUX_LENGTH - base] = (len == 0) ? SWAUX_NO_PAYLOAD :  in ps8640_aux_transfer_msg()
258 					      ((len - 1) & SWAUX_LENGTH_MASK);  in ps8640_aux_transfer_msg()
299 			msg->reply |= DP_AUX_NATIVE_REPLY_NACK;  in ps8640_aux_transfer_msg()
301 			msg->reply |= DP_AUX_I2C_REPLY_NACK;  in ps8640_aux_transfer_msg()
310 			msg->reply |= DP_AUX_NATIVE_REPLY_DEFER;  in ps8640_aux_transfer_msg()
312 			msg->reply |= DP_AUX_I2C_REPLY_DEFER;  in ps8640_aux_transfer_msg()
316 		return -EOPNOTSUPP;  in ps8640_aux_transfer_msg()
318 		return -ETIMEDOUT;  in ps8640_aux_transfer_msg()
344 	struct device *dev = &ps_bridge->page[PAGE0_DP_CNTL]->dev;  in ps8640_aux_transfer()
358 	struct regmap *map = ps_bridge->regmap[PAGE3_DSI_CNTL1];  in ps8640_bridge_vdo_control()
359 	struct device *dev = &ps_bridge->page[PAGE3_DSI_CNTL1]->dev;  in ps8640_bridge_vdo_control()
376 	ret = regulator_bulk_enable(ARRAY_SIZE(ps_bridge->supplies),  in ps8640_resume()
377 				    ps_bridge->supplies);  in ps8640_resume()
383 	gpiod_set_value(ps_bridge->gpio_powerdown, 0);  in ps8640_resume()
384 	gpiod_set_value(ps_bridge->gpio_reset, 1);  in ps8640_resume()
386 	gpiod_set_value(ps_bridge->gpio_reset, 0);  in ps8640_resume()
389 	gpiod_set_value(ps_bridge->gpio_reset, 1);  in ps8640_resume()
391 	gpiod_set_value(ps_bridge->gpio_reset, 0);  in ps8640_resume()
394 	ps_bridge->need_post_hpd_delay = true;  in ps8640_resume()
413 	gpiod_set_value(ps_bridge->gpio_reset, 1);  in ps8640_suspend()
414 	gpiod_set_value(ps_bridge->gpio_powerdown, 1);  in ps8640_suspend()
415 	ret = regulator_bulk_disable(ARRAY_SIZE(ps_bridge->supplies),  in ps8640_suspend()
416 				     ps_bridge->supplies);  in ps8640_suspend()
433 	struct regmap *map = ps_bridge->regmap[PAGE2_TOP_CNTL];  in ps8640_atomic_pre_enable()
434 	struct device *dev = &ps_bridge->page[PAGE0_DP_CNTL]->dev;  in ps8640_atomic_pre_enable()
461 	ps_bridge->pre_enabled = true;  in ps8640_atomic_pre_enable()
469 	ps_bridge->pre_enabled = false;  in ps8640_atomic_post_disable()
472 	pm_runtime_put_sync_suspend(&ps_bridge->page[PAGE0_DP_CNTL]->dev);  in ps8640_atomic_post_disable()
479 	struct device *dev = &ps_bridge->page[0]->dev;  in ps8640_bridge_attach()
483 		return -EINVAL;  in ps8640_bridge_attach()
485 	ps_bridge->aux.drm_dev = bridge->dev;  in ps8640_bridge_attach()
486 	ret = drm_dp_aux_register(&ps_bridge->aux);  in ps8640_bridge_attach()
492 	ps_bridge->link = device_link_add(bridge->dev->dev, dev, DL_FLAG_STATELESS);  in ps8640_bridge_attach()
493 	if (!ps_bridge->link) {  in ps8640_bridge_attach()
495 		ret = -EINVAL;  in ps8640_bridge_attach()
499 	/* Attach the panel-bridge to the dsi bridge */  in ps8640_bridge_attach()
500 	ret = drm_bridge_attach(bridge->encoder, ps_bridge->panel_bridge,  in ps8640_bridge_attach()
501 				&ps_bridge->bridge, flags);  in ps8640_bridge_attach()
508 	device_link_del(ps_bridge->link);  in ps8640_bridge_attach()
510 	drm_dp_aux_unregister(&ps_bridge->aux);  in ps8640_bridge_attach()
519 	drm_dp_aux_unregister(&ps_bridge->aux);  in ps8640_bridge_detach()
520 	if (ps_bridge->link)  in ps8640_bridge_detach()
521 		device_link_del(ps_bridge->link);  in ps8640_bridge_detach()
551 	in_ep = of_graph_get_endpoint_by_regs(dev->of_node, 0, -1);  in ps8640_bridge_get_dsi_resources()
553 		return -ENODEV;  in ps8640_bridge_get_dsi_resources()
558 		return -ENODEV;  in ps8640_bridge_get_dsi_resources()
563 		return -EPROBE_DEFER;  in ps8640_bridge_get_dsi_resources()
571 	ps_bridge->dsi = dsi;  in ps8640_bridge_get_dsi_resources()
573 	dsi->host = host;  in ps8640_bridge_get_dsi_resources()
574 	dsi->mode_flags = MIPI_DSI_MODE_VIDEO |  in ps8640_bridge_get_dsi_resources()
576 	dsi->format = MIPI_DSI_FMT_RGB888;  in ps8640_bridge_get_dsi_resources()
577 	dsi->lanes = NUM_MIPI_LANES;  in ps8640_bridge_get_dsi_resources()
585 	struct device *dev = aux->dev;  in ps8640_bridge_link_panel()
586 	struct device_node *np = dev->of_node;  in ps8640_bridge_link_panel()
590 	 * NOTE about returning -EPROBE_DEFER from this function: if we  in ps8640_bridge_link_panel()
591 	 * return an error (most relevant to -EPROBE_DEFER) it will only  in ps8640_bridge_link_panel()
593 	 * panel isn't under the "aux-bus" node). That should be fine because  in ps8640_bridge_link_panel()
594 	 * if the panel is under "aux-bus" it's guaranteed to have probed by  in ps8640_bridge_link_panel()
599 	ps_bridge->panel_bridge = devm_drm_of_get_bridge(dev, np, 1, 0);  in ps8640_bridge_link_panel()
600 	if (IS_ERR(ps_bridge->panel_bridge))  in ps8640_bridge_link_panel()
601 		return PTR_ERR(ps_bridge->panel_bridge);  in ps8640_bridge_link_panel()
603 	ret = devm_drm_bridge_add(dev, &ps_bridge->bridge);  in ps8640_bridge_link_panel()
607 	return devm_mipi_dsi_attach(dev, ps_bridge->dsi);  in ps8640_bridge_link_panel()
612 	struct device *dev = &client->dev;  in ps8640_probe()
619 		return -ENOMEM;  in ps8640_probe()
621 	ps_bridge->supplies[0].supply = "vdd12";  in ps8640_probe()
622 	ps_bridge->supplies[1].supply = "vdd33";  in ps8640_probe()
623 	ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(ps_bridge->supplies),  in ps8640_probe()
624 				      ps_bridge->supplies);  in ps8640_probe()
628 	ps_bridge->gpio_powerdown = devm_gpiod_get(&client->dev, "powerdown",  in ps8640_probe()
630 	if (IS_ERR(ps_bridge->gpio_powerdown))  in ps8640_probe()
631 		return PTR_ERR(ps_bridge->gpio_powerdown);  in ps8640_probe()
636 	ps_bridge->gpio_reset = devm_gpiod_get(&client->dev, "reset",  in ps8640_probe()
638 	if (IS_ERR(ps_bridge->gpio_reset))  in ps8640_probe()
639 		return PTR_ERR(ps_bridge->gpio_reset);  in ps8640_probe()
641 	ps_bridge->bridge.funcs = &ps8640_bridge_funcs;  in ps8640_probe()
642 	ps_bridge->bridge.of_node = dev->of_node;  in ps8640_probe()
643 	ps_bridge->bridge.type = DRM_MODE_CONNECTOR_eDP;  in ps8640_probe()
646 	 * Get MIPI DSI resources early. These can return -EPROBE_DEFER so  in ps8640_probe()
649 	ret = ps8640_bridge_get_dsi_resources(&client->dev, ps_bridge);  in ps8640_probe()
653 	ps_bridge->page[PAGE0_DP_CNTL] = client;  in ps8640_probe()
655 	ps_bridge->regmap[PAGE0_DP_CNTL] = devm_regmap_init_i2c(client, ps8640_regmap_config);  in ps8640_probe()
656 	if (IS_ERR(ps_bridge->regmap[PAGE0_DP_CNTL]))  in ps8640_probe()
657 		return PTR_ERR(ps_bridge->regmap[PAGE0_DP_CNTL]);  in ps8640_probe()
659 	for (i = 1; i < ARRAY_SIZE(ps_bridge->page); i++) {  in ps8640_probe()
660 		ps_bridge->page[i] = devm_i2c_new_dummy_device(&client->dev,  in ps8640_probe()
661 							     client->adapter,  in ps8640_probe()
662 							     client->addr + i);  in ps8640_probe()
663 		if (IS_ERR(ps_bridge->page[i]))  in ps8640_probe()
664 			return PTR_ERR(ps_bridge->page[i]);  in ps8640_probe()
666 		ps_bridge->regmap[i] = devm_regmap_init_i2c(ps_bridge->page[i],  in ps8640_probe()
668 		if (IS_ERR(ps_bridge->regmap[i]))  in ps8640_probe()
669 			return PTR_ERR(ps_bridge->regmap[i]);  in ps8640_probe()
674 	ps_bridge->aux.name = "parade-ps8640-aux";  in ps8640_probe()
675 	ps_bridge->aux.dev = dev;  in ps8640_probe()
676 	ps_bridge->aux.transfer = ps8640_aux_transfer;  in ps8640_probe()
677 	ps_bridge->aux.wait_hpd_asserted = ps8640_wait_hpd_asserted;  in ps8640_probe()
678 	drm_dp_aux_init(&ps_bridge->aux);  in ps8640_probe()
696 	ret = devm_of_dp_aux_populate_bus(&ps_bridge->aux, ps8640_bridge_link_panel);  in ps8640_probe()
699 	 * If devm_of_dp_aux_populate_bus() returns -ENODEV then it's up to  in ps8640_probe()
701 	 * the function is allowed to -EPROBE_DEFER.  in ps8640_probe()
703 	if (ret == -ENODEV)  in ps8640_probe()
704 		return ps8640_bridge_link_panel(&ps_bridge->aux);  in ps8640_probe()
728 MODULE_DESCRIPTION("PARADE ps8640 DSI-eDP converter driver");