1 /*
2  * Copyright (c) 2007 Dave Airlie <airlied@linux.ie>
3  * Copyright (c) 2007, 2010 Intel Corporation
4  *   Jesse Barnes <jesse.barnes@intel.com>
5  *
6  * Permission is hereby granted, free of charge, to any person obtaining a
7  * copy of this software and associated documentation files (the "Software"),
8  * to deal in the Software without restriction, including without limitation
9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10  * and/or sell copies of the Software, and to permit persons to whom the
11  * Software is furnished to do so, subject to the following conditions:
12  *
13  * The above copyright notice and this permission notice (including the next
14  * paragraph) shall be included in all copies or substantial portions of the
15  * Software.
16  *
17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
20  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
22  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
23  * DEALINGS IN THE SOFTWARE.
24  */
25 
26 #include <linux/i2c.h>
27 #include <linux/slab.h>
28 
29 #include <drm/drm_atomic_helper.h>
30 #include <drm/drm_edid.h>
31 
32 #include "display/intel_panel.h"
33 
34 #include "i915_drv.h"
35 #include "intel_connector.h"
36 #include "intel_display_debugfs.h"
37 #include "intel_display_types.h"
38 #include "intel_hdcp.h"
39 
40 int intel_connector_init(struct intel_connector *connector)
41 {
42 	struct intel_digital_connector_state *conn_state;
43 
44 	/*
45 	 * Allocate enough memory to hold intel_digital_connector_state,
46 	 * This might be a few bytes too many, but for connectors that don't
47 	 * need it we'll free the state and allocate a smaller one on the first
48 	 * successful commit anyway.
49 	 */
50 	conn_state = kzalloc(sizeof(*conn_state), GFP_KERNEL);
51 	if (!conn_state)
52 		return -ENOMEM;
53 
54 	__drm_atomic_helper_connector_reset(&connector->base,
55 					    &conn_state->base);
56 
57 	return 0;
58 }
59 
60 struct intel_connector *intel_connector_alloc(void)
61 {
62 	struct intel_connector *connector;
63 
64 	connector = kzalloc(sizeof(*connector), GFP_KERNEL);
65 	if (!connector)
66 		return NULL;
67 
68 	if (intel_connector_init(connector) < 0) {
69 		kfree(connector);
70 		return NULL;
71 	}
72 
73 	return connector;
74 }
75 
76 /*
77  * Free the bits allocated by intel_connector_alloc.
78  * This should only be used after intel_connector_alloc has returned
79  * successfully, and before drm_connector_init returns successfully.
80  * Otherwise the destroy callbacks for the connector and the state should
81  * take care of proper cleanup/free (see intel_connector_destroy).
82  */
83 void intel_connector_free(struct intel_connector *connector)
84 {
85 	kfree(to_intel_digital_connector_state(connector->base.state));
86 	kfree(connector);
87 }
88 
89 /*
90  * Connector type independent destroy hook for drm_connector_funcs.
91  */
92 void intel_connector_destroy(struct drm_connector *connector)
93 {
94 	struct intel_connector *intel_connector = to_intel_connector(connector);
95 
96 	kfree(intel_connector->detect_edid);
97 
98 	intel_hdcp_cleanup(intel_connector);
99 
100 	if (!IS_ERR_OR_NULL(intel_connector->edid))
101 		kfree(intel_connector->edid);
102 
103 	intel_panel_fini(&intel_connector->panel);
104 
105 	drm_connector_cleanup(connector);
106 
107 	if (intel_connector->port)
108 		drm_dp_mst_put_port_malloc(intel_connector->port);
109 
110 	kfree(connector);
111 }
112 
113 int intel_connector_register(struct drm_connector *connector)
114 {
115 	struct intel_connector *intel_connector = to_intel_connector(connector);
116 	int ret;
117 
118 	ret = intel_backlight_device_register(intel_connector);
119 	if (ret)
120 		goto err;
121 
122 	if (i915_inject_probe_failure(to_i915(connector->dev))) {
123 		ret = -EFAULT;
124 		goto err_backlight;
125 	}
126 
127 	intel_connector_debugfs_add(connector);
128 
129 	return 0;
130 
131 err_backlight:
132 	intel_backlight_device_unregister(intel_connector);
133 err:
134 	return ret;
135 }
136 
137 void intel_connector_unregister(struct drm_connector *connector)
138 {
139 	struct intel_connector *intel_connector = to_intel_connector(connector);
140 
141 	intel_backlight_device_unregister(intel_connector);
142 }
143 
144 void intel_connector_attach_encoder(struct intel_connector *connector,
145 				    struct intel_encoder *encoder)
146 {
147 	connector->encoder = encoder;
148 	drm_connector_attach_encoder(&connector->base, &encoder->base);
149 }
150 
151 /*
152  * Simple connector->get_hw_state implementation for encoders that support only
153  * one connector and no cloning and hence the encoder state determines the state
154  * of the connector.
155  */
156 bool intel_connector_get_hw_state(struct intel_connector *connector)
157 {
158 	enum pipe pipe = 0;
159 	struct intel_encoder *encoder = intel_attached_encoder(connector);
160 
161 	return encoder->get_hw_state(encoder, &pipe);
162 }
163 
164 enum pipe intel_connector_get_pipe(struct intel_connector *connector)
165 {
166 	struct drm_device *dev = connector->base.dev;
167 
168 	drm_WARN_ON(dev,
169 		    !drm_modeset_is_locked(&dev->mode_config.connection_mutex));
170 
171 	if (!connector->base.state->crtc)
172 		return INVALID_PIPE;
173 
174 	return to_intel_crtc(connector->base.state->crtc)->pipe;
175 }
176 
177 /**
178  * intel_connector_update_modes - update connector from edid
179  * @connector: DRM connector device to use
180  * @edid: previously read EDID information
181  */
182 int intel_connector_update_modes(struct drm_connector *connector,
183 				struct edid *edid)
184 {
185 	int ret;
186 
187 	drm_connector_update_edid_property(connector, edid);
188 	ret = drm_add_edid_modes(connector, edid);
189 
190 	return ret;
191 }
192 
193 /**
194  * intel_ddc_get_modes - get modelist from monitor
195  * @connector: DRM connector device to use
196  * @adapter: i2c adapter
197  *
198  * Fetch the EDID information from @connector using the DDC bus.
199  */
200 int intel_ddc_get_modes(struct drm_connector *connector,
201 			struct i2c_adapter *adapter)
202 {
203 	struct edid *edid;
204 	int ret;
205 
206 	edid = drm_get_edid(connector, adapter);
207 	if (!edid)
208 		return 0;
209 
210 	ret = intel_connector_update_modes(connector, edid);
211 	kfree(edid);
212 
213 	return ret;
214 }
215 
216 static const struct drm_prop_enum_list force_audio_names[] = {
217 	{ HDMI_AUDIO_OFF_DVI, "force-dvi" },
218 	{ HDMI_AUDIO_OFF, "off" },
219 	{ HDMI_AUDIO_AUTO, "auto" },
220 	{ HDMI_AUDIO_ON, "on" },
221 };
222 
223 void
224 intel_attach_force_audio_property(struct drm_connector *connector)
225 {
226 	struct drm_device *dev = connector->dev;
227 	struct drm_i915_private *dev_priv = to_i915(dev);
228 	struct drm_property *prop;
229 
230 	prop = dev_priv->force_audio_property;
231 	if (prop == NULL) {
232 		prop = drm_property_create_enum(dev, 0,
233 					   "audio",
234 					   force_audio_names,
235 					   ARRAY_SIZE(force_audio_names));
236 		if (prop == NULL)
237 			return;
238 
239 		dev_priv->force_audio_property = prop;
240 	}
241 	drm_object_attach_property(&connector->base, prop, 0);
242 }
243 
244 static const struct drm_prop_enum_list broadcast_rgb_names[] = {
245 	{ INTEL_BROADCAST_RGB_AUTO, "Automatic" },
246 	{ INTEL_BROADCAST_RGB_FULL, "Full" },
247 	{ INTEL_BROADCAST_RGB_LIMITED, "Limited 16:235" },
248 };
249 
250 void
251 intel_attach_broadcast_rgb_property(struct drm_connector *connector)
252 {
253 	struct drm_device *dev = connector->dev;
254 	struct drm_i915_private *dev_priv = to_i915(dev);
255 	struct drm_property *prop;
256 
257 	prop = dev_priv->broadcast_rgb_property;
258 	if (prop == NULL) {
259 		prop = drm_property_create_enum(dev, DRM_MODE_PROP_ENUM,
260 					   "Broadcast RGB",
261 					   broadcast_rgb_names,
262 					   ARRAY_SIZE(broadcast_rgb_names));
263 		if (prop == NULL)
264 			return;
265 
266 		dev_priv->broadcast_rgb_property = prop;
267 	}
268 
269 	drm_object_attach_property(&connector->base, prop, 0);
270 }
271 
272 void
273 intel_attach_aspect_ratio_property(struct drm_connector *connector)
274 {
275 	if (!drm_mode_create_aspect_ratio_property(connector->dev))
276 		drm_object_attach_property(&connector->base,
277 			connector->dev->mode_config.aspect_ratio_property,
278 			DRM_MODE_PICTURE_ASPECT_NONE);
279 }
280 
281 void
282 intel_attach_colorspace_property(struct drm_connector *connector)
283 {
284 	switch (connector->connector_type) {
285 	case DRM_MODE_CONNECTOR_HDMIA:
286 	case DRM_MODE_CONNECTOR_HDMIB:
287 		if (drm_mode_create_hdmi_colorspace_property(connector))
288 			return;
289 		break;
290 	case DRM_MODE_CONNECTOR_DisplayPort:
291 	case DRM_MODE_CONNECTOR_eDP:
292 		if (drm_mode_create_dp_colorspace_property(connector))
293 			return;
294 		break;
295 	default:
296 		MISSING_CASE(connector->connector_type);
297 		return;
298 	}
299 
300 	drm_object_attach_property(&connector->base,
301 				   connector->colorspace_property, 0);
302 }
303