1 // SPDX-License-Identifier: GPL-2.0
3  * TPD12S015 HDMI ESD protection & level shifter chip driver
7  * Based on the omapdrm-specific encoder-opa362 driver
25 	struct drm_bridge bridge;  member
35 static inline struct tpd12s015_device *to_tpd12s015(struct drm_bridge *bridge)  in to_tpd12s015()  argument
37 	return container_of(bridge, struct tpd12s015_device, bridge);  in to_tpd12s015()
40 static int tpd12s015_attach(struct drm_bridge *bridge,  in tpd12s015_attach()  argument
43 	struct tpd12s015_device *tpd = to_tpd12s015(bridge);  in tpd12s015_attach()
47 		return -EINVAL;  in tpd12s015_attach()
49 	ret = drm_bridge_attach(bridge->encoder, tpd->next_bridge,  in tpd12s015_attach()
50 				bridge, flags);  in tpd12s015_attach()
54 	gpiod_set_value_cansleep(tpd->ls_oe_gpio, 1);  in tpd12s015_attach()
56 	/* DC-DC converter needs at max 300us to get to 90% of 5V. */  in tpd12s015_attach()
62 static void tpd12s015_detach(struct drm_bridge *bridge)  in tpd12s015_detach()  argument
64 	struct tpd12s015_device *tpd = to_tpd12s015(bridge);  in tpd12s015_detach()
66 	gpiod_set_value_cansleep(tpd->ls_oe_gpio, 0);  in tpd12s015_detach()
69 static enum drm_connector_status tpd12s015_detect(struct drm_bridge *bridge)  in tpd12s015_detect()  argument
71 	struct tpd12s015_device *tpd = to_tpd12s015(bridge);  in tpd12s015_detect()
73 	if (gpiod_get_value_cansleep(tpd->hpd_gpio))  in tpd12s015_detect()
79 static void tpd12s015_hpd_enable(struct drm_bridge *bridge)  in tpd12s015_hpd_enable()  argument
81 	struct tpd12s015_device *tpd = to_tpd12s015(bridge);  in tpd12s015_hpd_enable()
83 	gpiod_set_value_cansleep(tpd->ct_cp_hpd_gpio, 1);  in tpd12s015_hpd_enable()
86 static void tpd12s015_hpd_disable(struct drm_bridge *bridge)  in tpd12s015_hpd_disable()  argument
88 	struct tpd12s015_device *tpd = to_tpd12s015(bridge);  in tpd12s015_hpd_disable()
90 	gpiod_set_value_cansleep(tpd->ct_cp_hpd_gpio, 0);  in tpd12s015_hpd_disable()
104 	struct drm_bridge *bridge = &tpd->bridge;  in tpd12s015_hpd_isr()  local
106 	drm_bridge_hpd_notify(bridge, tpd12s015_detect(bridge));  in tpd12s015_hpd_isr()
118 	tpd = devm_kzalloc(&pdev->dev, sizeof(*tpd), GFP_KERNEL);  in tpd12s015_probe()
120 		return -ENOMEM;  in tpd12s015_probe()
124 	tpd->bridge.funcs = &tpd12s015_bridge_funcs;  in tpd12s015_probe()
125 	tpd->bridge.of_node = pdev->dev.of_node;  in tpd12s015_probe()
126 	tpd->bridge.type = DRM_MODE_CONNECTOR_HDMIA;  in tpd12s015_probe()
127 	tpd->bridge.ops = DRM_BRIDGE_OP_DETECT;  in tpd12s015_probe()
129 	/* Get the next bridge, connected to port@1. */  in tpd12s015_probe()
130 	node = of_graph_get_remote_node(pdev->dev.of_node, 1, -1);  in tpd12s015_probe()
132 		return -ENODEV;  in tpd12s015_probe()
134 	tpd->next_bridge = of_drm_find_bridge(node);  in tpd12s015_probe()
137 	if (!tpd->next_bridge)  in tpd12s015_probe()
138 		return -EPROBE_DEFER;  in tpd12s015_probe()
141 	gpio = devm_gpiod_get_index_optional(&pdev->dev, NULL, 0,  in tpd12s015_probe()
146 	tpd->ct_cp_hpd_gpio = gpio;  in tpd12s015_probe()
148 	gpio = devm_gpiod_get_index_optional(&pdev->dev, NULL, 1,  in tpd12s015_probe()
153 	tpd->ls_oe_gpio = gpio;  in tpd12s015_probe()
155 	gpio = devm_gpiod_get_index(&pdev->dev, NULL, 2, GPIOD_IN);  in tpd12s015_probe()
159 	tpd->hpd_gpio = gpio;  in tpd12s015_probe()
161 	/* Register the IRQ if the HPD GPIO is IRQ-capable. */  in tpd12s015_probe()
162 	tpd->hpd_irq = gpiod_to_irq(tpd->hpd_gpio);  in tpd12s015_probe()
163 	if (tpd->hpd_irq) {  in tpd12s015_probe()
164 		ret = devm_request_threaded_irq(&pdev->dev, tpd->hpd_irq, NULL,  in tpd12s015_probe()
173 		tpd->bridge.ops |= DRM_BRIDGE_OP_HPD;  in tpd12s015_probe()
176 	/* Register the DRM bridge. */  in tpd12s015_probe()
177 	drm_bridge_add(&tpd->bridge);  in tpd12s015_probe()
186 	drm_bridge_remove(&tpd->bridge);  in tpd12s015_remove()
210 MODULE_DESCRIPTION("TPD12S015 HDMI level shifter and ESD protection driver");