1 // SPDX-License-Identifier: GPL-2.0
3  * THC63LVD1024 LVDS to parallel data DRM bridge driver.
50 	return drm_bridge_attach(bridge->encoder, thc63->next, bridge, flags);  in thc63_attach()
63 	 * dual-in, single-out where it is 40 to 150 MHz. As dual-in, dual-out  in thc63_mode_valid()
67 	if (thc63->timings.dual_link) {  in thc63_mode_valid()
75 	if (mode->clock < min_freq)  in thc63_mode_valid()
78 	if (mode->clock > max_freq)  in thc63_mode_valid()
89 	ret = regulator_enable(thc63->vcc);  in thc63_enable()
91 		dev_err(thc63->dev,  in thc63_enable()
96 	gpiod_set_value(thc63->pdwn, 0);  in thc63_enable()
97 	gpiod_set_value(thc63->oe, 1);  in thc63_enable()
105 	gpiod_set_value(thc63->oe, 0);  in thc63_disable()
106 	gpiod_set_value(thc63->pdwn, 1);  in thc63_disable()
108 	ret = regulator_disable(thc63->vcc);  in thc63_disable()
110 		dev_err(thc63->dev,  in thc63_disable()
126 	remote = of_graph_get_remote_node(thc63->dev->of_node,  in thc63_parse_dt()
127 					  THC63_RGB_OUT0, -1);  in thc63_parse_dt()
129 		dev_err(thc63->dev, "No remote endpoint for port@%u\n",  in thc63_parse_dt()
131 		return -ENODEV;  in thc63_parse_dt()
134 	thc63->next = of_drm_find_bridge(remote);  in thc63_parse_dt()
136 	if (!thc63->next)  in thc63_parse_dt()
137 		return -EPROBE_DEFER;  in thc63_parse_dt()
139 	endpoint = of_graph_get_endpoint_by_regs(thc63->dev->of_node,  in thc63_parse_dt()
140 						 THC63_LVDS_IN1, -1);  in thc63_parse_dt()
147 				thc63->timings.dual_link = true;  in thc63_parse_dt()
152 	dev_dbg(thc63->dev, "operating in %s-link mode\n",  in thc63_parse_dt()
153 		thc63->timings.dual_link ? "dual" : "single");  in thc63_parse_dt()
160 	thc63->oe = devm_gpiod_get_optional(thc63->dev, "oe", GPIOD_OUT_LOW);  in thc63_gpio_init()
161 	if (IS_ERR(thc63->oe)) {  in thc63_gpio_init()
162 		dev_err(thc63->dev, "Unable to get \"oe-gpios\": %ld\n",  in thc63_gpio_init()
163 			PTR_ERR(thc63->oe));  in thc63_gpio_init()
164 		return PTR_ERR(thc63->oe);  in thc63_gpio_init()
167 	thc63->pdwn = devm_gpiod_get_optional(thc63->dev, "powerdown",  in thc63_gpio_init()
169 	if (IS_ERR(thc63->pdwn)) {  in thc63_gpio_init()
170 		dev_err(thc63->dev, "Unable to get \"powerdown-gpios\": %ld\n",  in thc63_gpio_init()
171 			PTR_ERR(thc63->pdwn));  in thc63_gpio_init()
172 		return PTR_ERR(thc63->pdwn);  in thc63_gpio_init()
183 	thc63 = devm_kzalloc(&pdev->dev, sizeof(*thc63), GFP_KERNEL);  in thc63_probe()
185 		return -ENOMEM;  in thc63_probe()
187 	thc63->dev = &pdev->dev;  in thc63_probe()
190 	thc63->vcc = devm_regulator_get(thc63->dev, "vcc");  in thc63_probe()
191 	if (IS_ERR(thc63->vcc)) {  in thc63_probe()
192 		if (PTR_ERR(thc63->vcc) == -EPROBE_DEFER)  in thc63_probe()
193 			return -EPROBE_DEFER;  in thc63_probe()
195 		dev_err(thc63->dev, "Unable to get \"vcc\" supply: %ld\n",  in thc63_probe()
196 			PTR_ERR(thc63->vcc));  in thc63_probe()
197 		return PTR_ERR(thc63->vcc);  in thc63_probe()
208 	thc63->bridge.driver_private = thc63;  in thc63_probe()
209 	thc63->bridge.of_node = pdev->dev.of_node;  in thc63_probe()
210 	thc63->bridge.funcs = &thc63_bridge_func;  in thc63_probe()
211 	thc63->bridge.timings = &thc63->timings;  in thc63_probe()
213 	drm_bridge_add(&thc63->bridge);  in thc63_probe()
222 	drm_bridge_remove(&thc63->bridge);  in thc63_remove()
242 MODULE_DESCRIPTION("Thine THC63LVD1024 LVDS decoder DRM bridge driver");