1 // SPDX-License-Identifier: GPL-2.0-only
100 	struct drm_dp_aux aux;  member
153 static inline struct ps8640 *aux_to_ps8640(struct drm_dp_aux *aux)  in aux_to_ps8640()  argument
155 	return container_of(aux, struct ps8640, aux);  in aux_to_ps8640()
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()
189 static int ps8640_wait_hpd_asserted(struct drm_dp_aux *aux, unsigned long wait_us)  in ps8640_wait_hpd_asserted()  argument
191 	struct ps8640 *ps_bridge = aux_to_ps8640(aux);  in ps8640_wait_hpd_asserted()
192 	struct device *dev = &ps_bridge->page[PAGE0_DP_CNTL]->dev;  in ps8640_wait_hpd_asserted()
208 static ssize_t ps8640_aux_transfer_msg(struct drm_dp_aux *aux,  in ps8640_aux_transfer_msg()  argument
211 	struct ps8640 *ps_bridge = aux_to_ps8640(aux);  in ps8640_aux_transfer_msg()
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()
214 	size_t len = msg->size;  in ps8640_aux_transfer_msg()
218 	u8 request = msg->request &  in ps8640_aux_transfer_msg()
220 	u8 *buf = msg->buffer;  in ps8640_aux_transfer_msg()
221 	u8 addr_len[PAGE0_SWAUX_LENGTH + 1 - PAGE0_SWAUX_ADDR_7_0];  in ps8640_aux_transfer_msg()
226 		return -EINVAL;  in ps8640_aux_transfer_msg()
228 	if (msg->address & ~SWAUX_ADDR_MASK)  in ps8640_aux_transfer_msg()
229 		return -EINVAL;  in ps8640_aux_transfer_msg()
240 		return -EINVAL;  in ps8640_aux_transfer_msg()
251 	msg->reply = 0;  in ps8640_aux_transfer_msg()
254 	addr_len[PAGE0_SWAUX_ADDR_7_0 - base] = msg->address;  in ps8640_aux_transfer_msg()
255 	addr_len[PAGE0_SWAUX_ADDR_15_8 - base] = msg->address >> 8;  in ps8640_aux_transfer_msg()
256 	addr_len[PAGE0_SWAUX_ADDR_23_16 - base] = (msg->address >> 16) |  in ps8640_aux_transfer_msg()
257 						  (msg->request << 4);  in ps8640_aux_transfer_msg()
258 	addr_len[PAGE0_SWAUX_LENGTH - base] = (len == 0) ? SWAUX_NO_PAYLOAD :  in ps8640_aux_transfer_msg()
259 					      ((len - 1) & SWAUX_LENGTH_MASK);  in ps8640_aux_transfer_msg()
300 			msg->reply |= DP_AUX_NATIVE_REPLY_NACK;  in ps8640_aux_transfer_msg()
302 			msg->reply |= DP_AUX_I2C_REPLY_NACK;  in ps8640_aux_transfer_msg()
311 			msg->reply |= DP_AUX_NATIVE_REPLY_DEFER;  in ps8640_aux_transfer_msg()
313 			msg->reply |= DP_AUX_I2C_REPLY_DEFER;  in ps8640_aux_transfer_msg()
317 		return -EOPNOTSUPP;  in ps8640_aux_transfer_msg()
319 		return -ETIMEDOUT;  in ps8640_aux_transfer_msg()
334 			if (i < msg->size)  in ps8640_aux_transfer_msg()
339 	return min(len, msg->size);  in ps8640_aux_transfer_msg()
342 static ssize_t ps8640_aux_transfer(struct drm_dp_aux *aux,  in ps8640_aux_transfer()  argument
345 	struct ps8640 *ps_bridge = aux_to_ps8640(aux);  in ps8640_aux_transfer()
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()
356 	ret = ps8640_aux_transfer_msg(aux, msg);  in ps8640_aux_transfer()
361 	mutex_unlock(&ps_bridge->aux_lock);  in ps8640_aux_transfer()
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()
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()
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()
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()
472 	ps_bridge->pre_enabled = true;  in ps8640_atomic_pre_enable()
480 	ps_bridge->pre_enabled = false;  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()
501 	struct device *dev = &ps_bridge->page[0]->dev;  in ps8640_bridge_attach()
505 		return -EINVAL;  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()
510 		dev_err(dev, "failed to register DP AUX channel: %d\n", ret);  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()
517 		ret = -EINVAL;  in ps8640_bridge_attach()
521 	/* Attach the panel-bridge to the dsi bridge */  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()
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()
573 	in_ep = of_graph_get_endpoint_by_regs(dev->of_node, 0, -1);  in ps8640_bridge_get_dsi_resources()
575 		return -ENODEV;  in ps8640_bridge_get_dsi_resources()
580 		return -ENODEV;  in ps8640_bridge_get_dsi_resources()
585 		return -EPROBE_DEFER;  in ps8640_bridge_get_dsi_resources()
593 	ps_bridge->dsi = dsi;  in ps8640_bridge_get_dsi_resources()
595 	dsi->host = host;  in ps8640_bridge_get_dsi_resources()
596 	dsi->mode_flags = MIPI_DSI_MODE_VIDEO |  in ps8640_bridge_get_dsi_resources()
598 	dsi->format = MIPI_DSI_FMT_RGB888;  in ps8640_bridge_get_dsi_resources()
599 	dsi->lanes = NUM_MIPI_LANES;  in ps8640_bridge_get_dsi_resources()
604 static int ps8640_bridge_link_panel(struct drm_dp_aux *aux)  in ps8640_bridge_link_panel()  argument
606 	struct ps8640 *ps_bridge = aux_to_ps8640(aux);  in ps8640_bridge_link_panel()
607 	struct device *dev = aux->dev;  in ps8640_bridge_link_panel()
608 	struct device_node *np = dev->of_node;  in ps8640_bridge_link_panel()
612 	 * NOTE about returning -EPROBE_DEFER from this function: if we  in ps8640_bridge_link_panel()
613 	 * return an error (most relevant to -EPROBE_DEFER) it will only  in ps8640_bridge_link_panel()
615 	 * panel isn't under the "aux-bus" node). That should be fine because  in ps8640_bridge_link_panel()
616 	 * if the panel is under "aux-bus" it's guaranteed to have probed by  in ps8640_bridge_link_panel()
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()
634 	struct device *dev = &client->dev;  in ps8640_probe()
641 		return -ENOMEM;  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()
670 	 * Get MIPI DSI resources early. These can return -EPROBE_DEFER so  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()
685 							     client->adapter,  in ps8640_probe()
686 							     client->addr + i);  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()
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()
723 	 * If devm_of_dp_aux_populate_bus() returns -ENODEV then it's up to  in ps8640_probe()
725 	 * the function is allowed to -EPROBE_DEFER.  in ps8640_probe()
727 	if (ret == -ENODEV)  in ps8640_probe()
728 		return ps8640_bridge_link_panel(&ps_bridge->aux);  in ps8640_probe()
752 MODULE_DESCRIPTION("PARADE ps8640 DSI-eDP converter driver");