1 // SPDX-License-Identifier: GPL-2.0
3  * THC63LVD1024 LVDS to parallel data DRM bridge driver.
45 	return drm_bridge_attach(bridge->encoder, thc63->next, bridge);  in thc63_attach()
53 	ret = regulator_enable(thc63->vcc);  in thc63_enable()
55 		dev_err(thc63->dev,  in thc63_enable()
60 	gpiod_set_value(thc63->pdwn, 0);  in thc63_enable()
61 	gpiod_set_value(thc63->oe, 1);  in thc63_enable()
69 	gpiod_set_value(thc63->oe, 0);  in thc63_disable()
70 	gpiod_set_value(thc63->pdwn, 1);  in thc63_disable()
72 	ret = regulator_disable(thc63->vcc);  in thc63_disable()
74 		dev_err(thc63->dev,  in thc63_disable()
89 	thc63_out = of_graph_get_endpoint_by_regs(thc63->dev->of_node,  in thc63_parse_dt()
90 						  THC63_RGB_OUT0, -1);  in thc63_parse_dt()
92 		dev_err(thc63->dev, "Missing endpoint in port@%u\n",  in thc63_parse_dt()
94 		return -ENODEV;  in thc63_parse_dt()
100 		dev_err(thc63->dev, "Endpoint in port@%u unconnected\n",  in thc63_parse_dt()
102 		return -ENODEV;  in thc63_parse_dt()
106 		dev_err(thc63->dev, "port@%u remote endpoint is disabled\n",  in thc63_parse_dt()
109 		return -ENODEV;  in thc63_parse_dt()
112 	thc63->next = of_drm_find_bridge(remote);  in thc63_parse_dt()
114 	if (!thc63->next)  in thc63_parse_dt()
115 		return -EPROBE_DEFER;  in thc63_parse_dt()
122 	thc63->oe = devm_gpiod_get_optional(thc63->dev, "oe", GPIOD_OUT_LOW);  in thc63_gpio_init()
123 	if (IS_ERR(thc63->oe)) {  in thc63_gpio_init()
124 		dev_err(thc63->dev, "Unable to get \"oe-gpios\": %ld\n",  in thc63_gpio_init()
125 			PTR_ERR(thc63->oe));  in thc63_gpio_init()
126 		return PTR_ERR(thc63->oe);  in thc63_gpio_init()
129 	thc63->pdwn = devm_gpiod_get_optional(thc63->dev, "powerdown",  in thc63_gpio_init()
131 	if (IS_ERR(thc63->pdwn)) {  in thc63_gpio_init()
132 		dev_err(thc63->dev, "Unable to get \"powerdown-gpios\": %ld\n",  in thc63_gpio_init()
133 			PTR_ERR(thc63->pdwn));  in thc63_gpio_init()
134 		return PTR_ERR(thc63->pdwn);  in thc63_gpio_init()
145 	thc63 = devm_kzalloc(&pdev->dev, sizeof(*thc63), GFP_KERNEL);  in thc63_probe()
147 		return -ENOMEM;  in thc63_probe()
149 	thc63->dev = &pdev->dev;  in thc63_probe()
152 	thc63->vcc = devm_regulator_get_optional(thc63->dev, "vcc");  in thc63_probe()
153 	if (IS_ERR(thc63->vcc)) {  in thc63_probe()
154 		if (PTR_ERR(thc63->vcc) == -EPROBE_DEFER)  in thc63_probe()
155 			return -EPROBE_DEFER;  in thc63_probe()
157 		dev_err(thc63->dev, "Unable to get \"vcc\" supply: %ld\n",  in thc63_probe()
158 			PTR_ERR(thc63->vcc));  in thc63_probe()
159 		return PTR_ERR(thc63->vcc);  in thc63_probe()
170 	thc63->bridge.driver_private = thc63;  in thc63_probe()
171 	thc63->bridge.of_node = pdev->dev.of_node;  in thc63_probe()
172 	thc63->bridge.funcs = &thc63_bridge_func;  in thc63_probe()
174 	drm_bridge_add(&thc63->bridge);  in thc63_probe()
183 	drm_bridge_remove(&thc63->bridge);  in thc63_remove()
205 MODULE_DESCRIPTION("Thine THC63LVD1024 LVDS decoder DRM bridge driver");