1 // SPDX-License-Identifier: GPL-2.0-only
99 	struct drm_dp_aux aux;  member
151 static inline struct ps8640 *aux_to_ps8640(struct drm_dp_aux *aux)  in aux_to_ps8640()  argument
153 	return container_of(aux, struct ps8640, aux);  in aux_to_ps8640()
158 	struct device_node *bus, *panel;  in ps8640_of_panel_on_aux_bus()  local
160 	bus = of_get_child_by_name(dev->of_node, "aux-bus");  in ps8640_of_panel_on_aux_bus()
161 	if (!bus)  in ps8640_of_panel_on_aux_bus()
164 	panel = of_get_child_by_name(bus, "panel");  in ps8640_of_panel_on_aux_bus()
165 	of_node_put(bus);  in ps8640_of_panel_on_aux_bus()
175 	struct regmap *map = ps_bridge->regmap[PAGE2_TOP_CNTL];  in _ps8640_wait_hpd_asserted()
196 	if (!ret && ps_bridge->need_post_hpd_delay) {  in _ps8640_wait_hpd_asserted()
197 		ps_bridge->need_post_hpd_delay = false;  in _ps8640_wait_hpd_asserted()
204 static int ps8640_wait_hpd_asserted(struct drm_dp_aux *aux, unsigned long wait_us)  in ps8640_wait_hpd_asserted()  argument
206 	struct ps8640 *ps_bridge = aux_to_ps8640(aux);  in ps8640_wait_hpd_asserted()
207 	struct device *dev = &ps_bridge->page[PAGE0_DP_CNTL]->dev;  in ps8640_wait_hpd_asserted()
223 static ssize_t ps8640_aux_transfer_msg(struct drm_dp_aux *aux,  in ps8640_aux_transfer_msg()  argument
226 	struct ps8640 *ps_bridge = aux_to_ps8640(aux);  in ps8640_aux_transfer_msg()
227 	struct regmap *map = ps_bridge->regmap[PAGE0_DP_CNTL];  in ps8640_aux_transfer_msg()
228 	struct device *dev = &ps_bridge->page[PAGE0_DP_CNTL]->dev;  in ps8640_aux_transfer_msg()
229 	unsigned int len = msg->size;  in ps8640_aux_transfer_msg()
233 	u8 request = msg->request &  in ps8640_aux_transfer_msg()
235 	u8 *buf = msg->buffer;  in ps8640_aux_transfer_msg()
236 	u8 addr_len[PAGE0_SWAUX_LENGTH + 1 - PAGE0_SWAUX_ADDR_7_0];  in ps8640_aux_transfer_msg()
241 		return -EINVAL;  in ps8640_aux_transfer_msg()
243 	if (msg->address & ~SWAUX_ADDR_MASK)  in ps8640_aux_transfer_msg()
244 		return -EINVAL;  in ps8640_aux_transfer_msg()
255 		return -EINVAL;  in ps8640_aux_transfer_msg()
266 	msg->reply = 0;  in ps8640_aux_transfer_msg()
269 	addr_len[PAGE0_SWAUX_ADDR_7_0 - base] = msg->address;  in ps8640_aux_transfer_msg()
270 	addr_len[PAGE0_SWAUX_ADDR_15_8 - base] = msg->address >> 8;  in ps8640_aux_transfer_msg()
271 	addr_len[PAGE0_SWAUX_ADDR_23_16 - base] = (msg->address >> 16) |  in ps8640_aux_transfer_msg()
272 						  (msg->request << 4);  in ps8640_aux_transfer_msg()
273 	addr_len[PAGE0_SWAUX_LENGTH - base] = (len == 0) ? SWAUX_NO_PAYLOAD :  in ps8640_aux_transfer_msg()
274 					      ((len - 1) & SWAUX_LENGTH_MASK);  in ps8640_aux_transfer_msg()
316 			msg->reply |= DP_AUX_NATIVE_REPLY_NACK;  in ps8640_aux_transfer_msg()
318 			msg->reply |= DP_AUX_I2C_REPLY_NACK;  in ps8640_aux_transfer_msg()
325 		return -EOPNOTSUPP;  in ps8640_aux_transfer_msg()
327 		return -ETIMEDOUT;  in ps8640_aux_transfer_msg()
349 static ssize_t ps8640_aux_transfer(struct drm_dp_aux *aux,  in ps8640_aux_transfer()  argument
352 	struct ps8640 *ps_bridge = aux_to_ps8640(aux);  in ps8640_aux_transfer()
353 	struct device *dev = &ps_bridge->page[PAGE0_DP_CNTL]->dev;  in ps8640_aux_transfer()
357 	ret = ps8640_aux_transfer_msg(aux, msg);  in ps8640_aux_transfer()
367 	struct regmap *map = ps_bridge->regmap[PAGE3_DSI_CNTL1];  in ps8640_bridge_vdo_control()
368 	struct device *dev = &ps_bridge->page[PAGE3_DSI_CNTL1]->dev;  in ps8640_bridge_vdo_control()
385 	ret = regulator_bulk_enable(ARRAY_SIZE(ps_bridge->supplies),  in ps8640_resume()
386 				    ps_bridge->supplies);  in ps8640_resume()
392 	gpiod_set_value(ps_bridge->gpio_powerdown, 0);  in ps8640_resume()
393 	gpiod_set_value(ps_bridge->gpio_reset, 1);  in ps8640_resume()
395 	gpiod_set_value(ps_bridge->gpio_reset, 0);  in ps8640_resume()
398 	gpiod_set_value(ps_bridge->gpio_reset, 1);  in ps8640_resume()
400 	gpiod_set_value(ps_bridge->gpio_reset, 0);  in ps8640_resume()
403 	ps_bridge->need_post_hpd_delay = true;  in ps8640_resume()
422 	gpiod_set_value(ps_bridge->gpio_reset, 1);  in ps8640_suspend()
423 	gpiod_set_value(ps_bridge->gpio_powerdown, 1);  in ps8640_suspend()
424 	ret = regulator_bulk_disable(ARRAY_SIZE(ps_bridge->supplies),  in ps8640_suspend()
425 				     ps_bridge->supplies);  in ps8640_suspend()
441 	struct regmap *map = ps_bridge->regmap[PAGE2_TOP_CNTL];  in ps8640_pre_enable()
442 	struct device *dev = &ps_bridge->page[PAGE0_DP_CNTL]->dev;  in ps8640_pre_enable()
469 	ps_bridge->pre_enabled = true;  in ps8640_pre_enable()
476 	ps_bridge->pre_enabled = false;  in ps8640_post_disable()
479 	pm_runtime_put_sync_suspend(&ps_bridge->page[PAGE0_DP_CNTL]->dev);  in ps8640_post_disable()
486 	struct device *dev = &ps_bridge->page[0]->dev;  in ps8640_bridge_attach()
490 		return -EINVAL;  in ps8640_bridge_attach()
492 	ps_bridge->aux.drm_dev = bridge->dev;  in ps8640_bridge_attach()
493 	ret = drm_dp_aux_register(&ps_bridge->aux);  in ps8640_bridge_attach()
495 		dev_err(dev, "failed to register DP AUX channel: %d\n", ret);  in ps8640_bridge_attach()
499 	ps_bridge->link = device_link_add(bridge->dev->dev, dev, DL_FLAG_STATELESS);  in ps8640_bridge_attach()
500 	if (!ps_bridge->link) {  in ps8640_bridge_attach()
502 		ret = -EINVAL;  in ps8640_bridge_attach()
506 	/* Attach the panel-bridge to the dsi bridge */  in ps8640_bridge_attach()
507 	ret = drm_bridge_attach(bridge->encoder, ps_bridge->panel_bridge,  in ps8640_bridge_attach()
508 				&ps_bridge->bridge, flags);  in ps8640_bridge_attach()
515 	device_link_del(ps_bridge->link);  in ps8640_bridge_attach()
517 	drm_dp_aux_unregister(&ps_bridge->aux);  in ps8640_bridge_attach()
526 	drm_dp_aux_unregister(&ps_bridge->aux);  in ps8640_bridge_detach()
527 	if (ps_bridge->link)  in ps8640_bridge_detach()
528 		device_link_del(ps_bridge->link);  in ps8640_bridge_detach()
535 	bool poweroff = !ps_bridge->pre_enabled;  in ps8640_bridge_get_edid()
542 	 *     -> drm_helper_probe_single_connector_modes  in ps8640_bridge_get_edid()
543 	 *        -> drm_bridge_connector_get_modes  in ps8640_bridge_get_edid()
544 	 *           -> ps8640_bridge_get_edid  in ps8640_bridge_get_edid()
553 			    ps_bridge->page[PAGE0_DP_CNTL]->adapter);  in ps8640_bridge_get_edid()
590 	in_ep = of_graph_get_endpoint_by_regs(dev->of_node, 0, -1);  in ps8640_bridge_get_dsi_resources()
592 		return -ENODEV;  in ps8640_bridge_get_dsi_resources()
597 		return -ENODEV;  in ps8640_bridge_get_dsi_resources()
602 		return -EPROBE_DEFER;  in ps8640_bridge_get_dsi_resources()
610 	ps_bridge->dsi = dsi;  in ps8640_bridge_get_dsi_resources()
612 	dsi->host = host;  in ps8640_bridge_get_dsi_resources()
613 	dsi->mode_flags = MIPI_DSI_MODE_VIDEO |  in ps8640_bridge_get_dsi_resources()
615 	dsi->format = MIPI_DSI_FMT_RGB888;  in ps8640_bridge_get_dsi_resources()
616 	dsi->lanes = NUM_MIPI_LANES;  in ps8640_bridge_get_dsi_resources()
621 static int ps8640_bridge_link_panel(struct drm_dp_aux *aux)  in ps8640_bridge_link_panel()  argument
623 	struct ps8640 *ps_bridge = aux_to_ps8640(aux);  in ps8640_bridge_link_panel()
624 	struct device *dev = aux->dev;  in ps8640_bridge_link_panel()
625 	struct device_node *np = dev->of_node;  in ps8640_bridge_link_panel()
629 	 * NOTE about returning -EPROBE_DEFER from this function: if we  in ps8640_bridge_link_panel()
630 	 * return an error (most relevant to -EPROBE_DEFER) it will only  in ps8640_bridge_link_panel()
632 	 * panel isn't under the "aux-bus" node). That should be fine because  in ps8640_bridge_link_panel()
633 	 * if the panel is under "aux-bus" it's guaranteed to have probed by  in ps8640_bridge_link_panel()
638 	ps_bridge->panel_bridge = devm_drm_of_get_bridge(dev, np, 1, 0);  in ps8640_bridge_link_panel()
639 	if (IS_ERR(ps_bridge->panel_bridge))  in ps8640_bridge_link_panel()
640 		return PTR_ERR(ps_bridge->panel_bridge);  in ps8640_bridge_link_panel()
642 	ret = devm_drm_bridge_add(dev, &ps_bridge->bridge);  in ps8640_bridge_link_panel()
646 	return devm_mipi_dsi_attach(dev, ps_bridge->dsi);  in ps8640_bridge_link_panel()
651 	struct device *dev = &client->dev;  in ps8640_probe()
658 		return -ENOMEM;  in ps8640_probe()
660 	ps_bridge->supplies[0].supply = "vdd12";  in ps8640_probe()
661 	ps_bridge->supplies[1].supply = "vdd33";  in ps8640_probe()
662 	ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(ps_bridge->supplies),  in ps8640_probe()
663 				      ps_bridge->supplies);  in ps8640_probe()
667 	ps_bridge->gpio_powerdown = devm_gpiod_get(&client->dev, "powerdown",  in ps8640_probe()
669 	if (IS_ERR(ps_bridge->gpio_powerdown))  in ps8640_probe()
670 		return PTR_ERR(ps_bridge->gpio_powerdown);  in ps8640_probe()
675 	ps_bridge->gpio_reset = devm_gpiod_get(&client->dev, "reset",  in ps8640_probe()
677 	if (IS_ERR(ps_bridge->gpio_reset))  in ps8640_probe()
678 		return PTR_ERR(ps_bridge->gpio_reset);  in ps8640_probe()
680 	ps_bridge->bridge.funcs = &ps8640_bridge_funcs;  in ps8640_probe()
681 	ps_bridge->bridge.of_node = dev->of_node;  in ps8640_probe()
682 	ps_bridge->bridge.type = DRM_MODE_CONNECTOR_eDP;  in ps8640_probe()
685 	 * In the device tree, if panel is listed under aux-bus of the bridge  in ps8640_probe()
687 	 * aux-bus. So let's not set DRM_BRIDGE_OP_EDID here.  in ps8640_probe()
689 	if (!ps8640_of_panel_on_aux_bus(&client->dev))  in ps8640_probe()
690 		ps_bridge->bridge.ops = DRM_BRIDGE_OP_EDID;  in ps8640_probe()
693 	 * Get MIPI DSI resources early. These can return -EPROBE_DEFER so  in ps8640_probe()
696 	ret = ps8640_bridge_get_dsi_resources(&client->dev, ps_bridge);  in ps8640_probe()
700 	ps_bridge->page[PAGE0_DP_CNTL] = client;  in ps8640_probe()
702 	ps_bridge->regmap[PAGE0_DP_CNTL] = devm_regmap_init_i2c(client, ps8640_regmap_config);  in ps8640_probe()
703 	if (IS_ERR(ps_bridge->regmap[PAGE0_DP_CNTL]))  in ps8640_probe()
704 		return PTR_ERR(ps_bridge->regmap[PAGE0_DP_CNTL]);  in ps8640_probe()
706 	for (i = 1; i < ARRAY_SIZE(ps_bridge->page); i++) {  in ps8640_probe()
707 		ps_bridge->page[i] = devm_i2c_new_dummy_device(&client->dev,  in ps8640_probe()
708 							     client->adapter,  in ps8640_probe()
709 							     client->addr + i);  in ps8640_probe()
710 		if (IS_ERR(ps_bridge->page[i]))  in ps8640_probe()
711 			return PTR_ERR(ps_bridge->page[i]);  in ps8640_probe()
713 		ps_bridge->regmap[i] = devm_regmap_init_i2c(ps_bridge->page[i],  in ps8640_probe()
715 		if (IS_ERR(ps_bridge->regmap[i]))  in ps8640_probe()
716 			return PTR_ERR(ps_bridge->regmap[i]);  in ps8640_probe()
721 	ps_bridge->aux.name = "parade-ps8640-aux";  in ps8640_probe()
722 	ps_bridge->aux.dev = dev;  in ps8640_probe()
723 	ps_bridge->aux.transfer = ps8640_aux_transfer;  in ps8640_probe()
724 	ps_bridge->aux.wait_hpd_asserted = ps8640_wait_hpd_asserted;  in ps8640_probe()
725 	drm_dp_aux_init(&ps_bridge->aux);  in ps8640_probe()
743 	ret = devm_of_dp_aux_populate_bus(&ps_bridge->aux, ps8640_bridge_link_panel);  in ps8640_probe()
746 	 * If devm_of_dp_aux_populate_bus() returns -ENODEV then it's up to  in ps8640_probe()
748 	 * the function is allowed to -EPROBE_DEFER.  in ps8640_probe()
750 	if (ret == -ENODEV)  in ps8640_probe()
751 		return ps8640_bridge_link_panel(&ps_bridge->aux);  in ps8640_probe()
775 MODULE_DESCRIPTION("PARADE ps8640 DSI-eDP converter driver");