1 // SPDX-License-Identifier: GPL-2.0
37 	return flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR ? 0 : -EINVAL;  in display_connector_attach()
45 	if (conn->hpd_gpio) {  in display_connector_detect()
46 		if (gpiod_get_value_cansleep(conn->hpd_gpio))  in display_connector_detect()
52 	if (conn->bridge.ddc && drm_probe_ddc(conn->bridge.ddc))  in display_connector_detect()
55 	switch (conn->bridge.type) {  in display_connector_detect()
62 		 * For DVI and HDMI connectors a DDC probe failure indicates  in display_connector_detect()
72 		 * Composite and S-Video connectors have no other detection  in display_connector_detect()
83 					       struct drm_connector *connector)  in display_connector_get_edid()  argument
87 	return drm_get_edid(connector, conn->bridge.ddc);  in display_connector_get_edid()
99 	struct drm_bridge *bridge = &conn->bridge;  in display_connector_hpd_irq()
113 	conn = devm_kzalloc(&pdev->dev, sizeof(*conn), GFP_KERNEL);  in display_connector_probe()
115 		return -ENOMEM;  in display_connector_probe()
119 	type = (uintptr_t)of_device_get_match_data(&pdev->dev);  in display_connector_probe()
121 	/* Get the exact connector type. */  in display_connector_probe()
126 		analog = of_property_read_bool(pdev->dev.of_node, "analog");  in display_connector_probe()
127 		digital = of_property_read_bool(pdev->dev.of_node, "digital");  in display_connector_probe()
129 			conn->bridge.type = DRM_MODE_CONNECTOR_DVIA;  in display_connector_probe()
131 			conn->bridge.type = DRM_MODE_CONNECTOR_DVID;  in display_connector_probe()
133 			conn->bridge.type = DRM_MODE_CONNECTOR_DVII;  in display_connector_probe()
135 			dev_err(&pdev->dev, "DVI connector with no type\n");  in display_connector_probe()
136 			return -EINVAL;  in display_connector_probe()
144 		ret = of_property_read_string(pdev->dev.of_node, "type",  in display_connector_probe()
147 			dev_err(&pdev->dev, "HDMI connector with no type\n");  in display_connector_probe()
148 			return -EINVAL;  in display_connector_probe()
153 			conn->bridge.type = DRM_MODE_CONNECTOR_HDMIA;  in display_connector_probe()
155 			conn->bridge.type = DRM_MODE_CONNECTOR_HDMIB;  in display_connector_probe()
157 			dev_err(&pdev->dev,  in display_connector_probe()
158 				"Unsupported HDMI connector type '%s'\n",  in display_connector_probe()
160 			return -EINVAL;  in display_connector_probe()
167 		conn->bridge.type = type;  in display_connector_probe()
171 	/* All the supported connector types support interlaced modes. */  in display_connector_probe()
172 	conn->bridge.interlace_allowed = true;  in display_connector_probe()
174 	/* Get the optional connector label. */  in display_connector_probe()
175 	of_property_read_string(pdev->dev.of_node, "label", &label);  in display_connector_probe()
178 	 * Get the HPD GPIO for DVI, HDMI and DP connectors. If the GPIO can provide  in display_connector_probe()
184 		conn->hpd_gpio = devm_gpiod_get_optional(&pdev->dev, "hpd",  in display_connector_probe()
186 		if (IS_ERR(conn->hpd_gpio)) {  in display_connector_probe()
187 			if (PTR_ERR(conn->hpd_gpio) != -EPROBE_DEFER)  in display_connector_probe()
188 				dev_err(&pdev->dev,  in display_connector_probe()
190 			return PTR_ERR(conn->hpd_gpio);  in display_connector_probe()
193 		conn->hpd_irq = gpiod_to_irq(conn->hpd_gpio);  in display_connector_probe()
195 		conn->hpd_irq = -EINVAL;  in display_connector_probe()
198 	if (conn->hpd_irq >= 0) {  in display_connector_probe()
199 		ret = devm_request_threaded_irq(&pdev->dev, conn->hpd_irq,  in display_connector_probe()
206 			dev_info(&pdev->dev,  in display_connector_probe()
208 			conn->hpd_irq = -EINVAL;  in display_connector_probe()
212 	/* Retrieve the DDC I2C adapter for DVI, HDMI and VGA connectors. */  in display_connector_probe()
218 		phandle = of_parse_phandle(pdev->dev.of_node, "ddc-i2c-bus", 0);  in display_connector_probe()
220 			conn->bridge.ddc = of_get_i2c_adapter_by_node(phandle);  in display_connector_probe()
222 			if (!conn->bridge.ddc)  in display_connector_probe()
223 				return -EPROBE_DEFER;  in display_connector_probe()
225 			dev_dbg(&pdev->dev,  in display_connector_probe()
230 	/* Get the DP PWR for DP connector. */  in display_connector_probe()
234 		conn->dp_pwr = devm_regulator_get_optional(&pdev->dev, "dp-pwr");  in display_connector_probe()
236 		if (IS_ERR(conn->dp_pwr)) {  in display_connector_probe()
237 			ret = PTR_ERR(conn->dp_pwr);  in display_connector_probe()
240 			case -ENODEV:  in display_connector_probe()
241 				conn->dp_pwr = NULL;  in display_connector_probe()
244 			case -EPROBE_DEFER:  in display_connector_probe()
245 				return -EPROBE_DEFER;  in display_connector_probe()
248 				dev_err(&pdev->dev, "failed to get DP PWR regulator: %d\n", ret);  in display_connector_probe()
253 		if (conn->dp_pwr) {  in display_connector_probe()
254 			ret = regulator_enable(conn->dp_pwr);  in display_connector_probe()
256 				dev_err(&pdev->dev, "failed to enable DP PWR regulator: %d\n", ret);  in display_connector_probe()
262 	conn->bridge.funcs = &display_connector_bridge_funcs;  in display_connector_probe()
263 	conn->bridge.of_node = pdev->dev.of_node;  in display_connector_probe()
265 	if (conn->bridge.ddc)  in display_connector_probe()
266 		conn->bridge.ops |= DRM_BRIDGE_OP_EDID  in display_connector_probe()
268 	if (conn->hpd_gpio)  in display_connector_probe()
269 		conn->bridge.ops |= DRM_BRIDGE_OP_DETECT;  in display_connector_probe()
270 	if (conn->hpd_irq >= 0)  in display_connector_probe()
271 		conn->bridge.ops |= DRM_BRIDGE_OP_HPD;  in display_connector_probe()
273 	dev_dbg(&pdev->dev,  in display_connector_probe()
274 		"Found %s display connector '%s' %s DDC bus and %s HPD GPIO (ops 0x%x)\n",  in display_connector_probe()
275 		drm_get_connector_type_name(conn->bridge.type),  in display_connector_probe()
277 		conn->bridge.ddc ? "with" : "without",  in display_connector_probe()
278 		conn->hpd_gpio ? "with" : "without",  in display_connector_probe()
279 		conn->bridge.ops);  in display_connector_probe()
281 	drm_bridge_add(&conn->bridge);  in display_connector_probe()
290 	if (conn->dp_pwr)  in display_connector_remove()
291 		regulator_disable(conn->dp_pwr);  in display_connector_remove()
293 	drm_bridge_remove(&conn->bridge);  in display_connector_remove()
295 	if (!IS_ERR(conn->bridge.ddc))  in display_connector_remove()
296 		i2c_put_adapter(conn->bridge.ddc);  in display_connector_remove()
303 		.compatible = "composite-video-connector",
306 		.compatible = "dvi-connector",
309 		.compatible = "hdmi-connector",
312 		.compatible = "svideo-connector",
315 		.compatible = "vga-connector",
318 		.compatible = "dp-connector",
329 		.name		= "display-connector",
336 MODULE_DESCRIPTION("Display connector driver");