1 // SPDX-License-Identifier: GPL-2.0-or-later
3  * Copyright (C) 2015-2016 Free Electrons
4  * Copyright (C) 2015-2016 NextThing Co
6  * Maxime Ripard <maxime.ripard@free-electrons.com>
28 	struct drm_connector	connector;  member
44 drm_connector_to_simple_bridge(struct drm_connector *connector)  in drm_connector_to_simple_bridge()  argument
46 	return container_of(connector, struct simple_bridge, connector);  in drm_connector_to_simple_bridge()
49 static int simple_bridge_get_modes(struct drm_connector *connector)  in simple_bridge_get_modes()  argument
51 	struct simple_bridge *sbridge = drm_connector_to_simple_bridge(connector);  in simple_bridge_get_modes()
55 	if (sbridge->next_bridge->ops & DRM_BRIDGE_OP_EDID) {  in simple_bridge_get_modes()
56 		edid = drm_bridge_get_edid(sbridge->next_bridge, connector);  in simple_bridge_get_modes()
69 		ret = drm_add_modes_noedid(connector, 1920, 1200);  in simple_bridge_get_modes()
70 		drm_set_preferred_mode(connector, 1024, 768);  in simple_bridge_get_modes()
74 	drm_connector_update_edid_property(connector, edid);  in simple_bridge_get_modes()
75 	ret = drm_add_edid_modes(connector, edid);  in simple_bridge_get_modes()
86 simple_bridge_connector_detect(struct drm_connector *connector, bool force)  in simple_bridge_connector_detect()  argument
88 	struct simple_bridge *sbridge = drm_connector_to_simple_bridge(connector);  in simple_bridge_connector_detect()
90 	return drm_bridge_detect(sbridge->next_bridge);  in simple_bridge_connector_detect()
108 	ret = drm_bridge_attach(bridge->encoder, sbridge->next_bridge, bridge,  in simple_bridge_attach()
116 	if (!bridge->encoder) {  in simple_bridge_attach()
118 		return -ENODEV;  in simple_bridge_attach()
121 	drm_connector_helper_add(&sbridge->connector,  in simple_bridge_attach()
123 	ret = drm_connector_init_with_ddc(bridge->dev, &sbridge->connector,  in simple_bridge_attach()
125 					  sbridge->info->connector_type,  in simple_bridge_attach()
126 					  sbridge->next_bridge->ddc);  in simple_bridge_attach()
128 		DRM_ERROR("Failed to initialize connector\n");  in simple_bridge_attach()
132 	drm_connector_attach_encoder(&sbridge->connector, bridge->encoder);  in simple_bridge_attach()
142 	if (sbridge->vdd) {  in simple_bridge_enable()
143 		ret = regulator_enable(sbridge->vdd);  in simple_bridge_enable()
148 	gpiod_set_value_cansleep(sbridge->enable, 1);  in simple_bridge_enable()
155 	gpiod_set_value_cansleep(sbridge->enable, 0);  in simple_bridge_disable()
157 	if (sbridge->vdd)  in simple_bridge_disable()
158 		regulator_disable(sbridge->vdd);  in simple_bridge_disable()
172 	sbridge = devm_kzalloc(&pdev->dev, sizeof(*sbridge), GFP_KERNEL);  in simple_bridge_probe()
174 		return -ENOMEM;  in simple_bridge_probe()
177 	sbridge->info = of_device_get_match_data(&pdev->dev);  in simple_bridge_probe()
180 	remote = of_graph_get_remote_node(pdev->dev.of_node, 1, -1);  in simple_bridge_probe()
182 		return -EINVAL;  in simple_bridge_probe()
184 	sbridge->next_bridge = of_drm_find_bridge(remote);  in simple_bridge_probe()
187 	if (!sbridge->next_bridge) {  in simple_bridge_probe()
188 		dev_dbg(&pdev->dev, "Next bridge not found, deferring probe\n");  in simple_bridge_probe()
189 		return -EPROBE_DEFER;  in simple_bridge_probe()
193 	sbridge->vdd = devm_regulator_get_optional(&pdev->dev, "vdd");  in simple_bridge_probe()
194 	if (IS_ERR(sbridge->vdd)) {  in simple_bridge_probe()
195 		int ret = PTR_ERR(sbridge->vdd);  in simple_bridge_probe()
196 		if (ret == -EPROBE_DEFER)  in simple_bridge_probe()
197 			return -EPROBE_DEFER;  in simple_bridge_probe()
198 		sbridge->vdd = NULL;  in simple_bridge_probe()
199 		dev_dbg(&pdev->dev, "No vdd regulator found: %d\n", ret);  in simple_bridge_probe()
202 	sbridge->enable = devm_gpiod_get_optional(&pdev->dev, "enable",  in simple_bridge_probe()
204 	if (IS_ERR(sbridge->enable)) {  in simple_bridge_probe()
205 		if (PTR_ERR(sbridge->enable) != -EPROBE_DEFER)  in simple_bridge_probe()
206 			dev_err(&pdev->dev, "Unable to retrieve enable GPIO\n");  in simple_bridge_probe()
207 		return PTR_ERR(sbridge->enable);  in simple_bridge_probe()
211 	sbridge->bridge.funcs = &simple_bridge_bridge_funcs;  in simple_bridge_probe()
212 	sbridge->bridge.of_node = pdev->dev.of_node;  in simple_bridge_probe()
213 	sbridge->bridge.timings = sbridge->info->timings;  in simple_bridge_probe()
215 	drm_bridge_add(&sbridge->bridge);  in simple_bridge_probe()
224 	drm_bridge_remove(&sbridge->bridge);  in simple_bridge_remove()
269 		.compatible = "dumb-vga-dac",
305 		.name		= "simple-bridge",
311 MODULE_AUTHOR("Maxime Ripard <maxime.ripard@free-electrons.com>");