1 /* $NetBSD: intel_connector.c,v 1.2 2021/12/18 23:45:29 riastradh Exp $ */
2
3 /*
4 * Copyright (c) 2007 Dave Airlie <airlied@linux.ie>
5 * Copyright (c) 2007, 2010 Intel Corporation
6 * Jesse Barnes <jesse.barnes@intel.com>
7 *
8 * Permission is hereby granted, free of charge, to any person obtaining a
9 * copy of this software and associated documentation files (the "Software"),
10 * to deal in the Software without restriction, including without limitation
11 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
12 * and/or sell copies of the Software, and to permit persons to whom the
13 * Software is furnished to do so, subject to the following conditions:
14 *
15 * The above copyright notice and this permission notice (including the next
16 * paragraph) shall be included in all copies or substantial portions of the
17 * Software.
18 *
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
20 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
21 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
22 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
23 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
24 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
25 * DEALINGS IN THE SOFTWARE.
26 */
27
28 #include <sys/cdefs.h>
29 __KERNEL_RCSID(0, "$NetBSD: intel_connector.c,v 1.2 2021/12/18 23:45:29 riastradh Exp $");
30
31 #include <linux/i2c.h>
32 #include <linux/slab.h>
33
34 #include <drm/drm_atomic_helper.h>
35 #include <drm/drm_edid.h>
36
37 #include "display/intel_panel.h"
38
39 #include "i915_drv.h"
40 #include "intel_connector.h"
41 #include "intel_display_types.h"
42 #include "intel_hdcp.h"
43
intel_connector_init(struct intel_connector * connector)44 int intel_connector_init(struct intel_connector *connector)
45 {
46 struct intel_digital_connector_state *conn_state;
47
48 /*
49 * Allocate enough memory to hold intel_digital_connector_state,
50 * This might be a few bytes too many, but for connectors that don't
51 * need it we'll free the state and allocate a smaller one on the first
52 * successful commit anyway.
53 */
54 conn_state = kzalloc(sizeof(*conn_state), GFP_KERNEL);
55 if (!conn_state)
56 return -ENOMEM;
57
58 __drm_atomic_helper_connector_reset(&connector->base,
59 &conn_state->base);
60
61 return 0;
62 }
63
intel_connector_alloc(void)64 struct intel_connector *intel_connector_alloc(void)
65 {
66 struct intel_connector *connector;
67
68 connector = kzalloc(sizeof(*connector), GFP_KERNEL);
69 if (!connector)
70 return NULL;
71
72 if (intel_connector_init(connector) < 0) {
73 kfree(connector);
74 return NULL;
75 }
76
77 return connector;
78 }
79
80 /*
81 * Free the bits allocated by intel_connector_alloc.
82 * This should only be used after intel_connector_alloc has returned
83 * successfully, and before drm_connector_init returns successfully.
84 * Otherwise the destroy callbacks for the connector and the state should
85 * take care of proper cleanup/free (see intel_connector_destroy).
86 */
intel_connector_free(struct intel_connector * connector)87 void intel_connector_free(struct intel_connector *connector)
88 {
89 kfree(to_intel_digital_connector_state(connector->base.state));
90 kfree(connector);
91 }
92
93 /*
94 * Connector type independent destroy hook for drm_connector_funcs.
95 */
intel_connector_destroy(struct drm_connector * connector)96 void intel_connector_destroy(struct drm_connector *connector)
97 {
98 struct intel_connector *intel_connector = to_intel_connector(connector);
99
100 kfree(intel_connector->detect_edid);
101
102 intel_hdcp_cleanup(intel_connector);
103
104 if (!IS_ERR_OR_NULL(intel_connector->edid))
105 kfree(intel_connector->edid);
106
107 intel_panel_fini(&intel_connector->panel);
108
109 drm_connector_cleanup(connector);
110
111 if (intel_connector->port)
112 drm_dp_mst_put_port_malloc(intel_connector->port);
113
114 kfree(connector);
115 }
116
intel_connector_register(struct drm_connector * connector)117 int intel_connector_register(struct drm_connector *connector)
118 {
119 struct intel_connector *intel_connector = to_intel_connector(connector);
120 int ret;
121
122 ret = intel_backlight_device_register(intel_connector);
123 if (ret)
124 goto err;
125
126 if (i915_inject_probe_failure(to_i915(connector->dev))) {
127 ret = -EFAULT;
128 goto err_backlight;
129 }
130
131 return 0;
132
133 err_backlight:
134 intel_backlight_device_unregister(intel_connector);
135 err:
136 return ret;
137 }
138
intel_connector_unregister(struct drm_connector * connector)139 void intel_connector_unregister(struct drm_connector *connector)
140 {
141 struct intel_connector *intel_connector = to_intel_connector(connector);
142
143 intel_backlight_device_unregister(intel_connector);
144 }
145
intel_connector_attach_encoder(struct intel_connector * connector,struct intel_encoder * encoder)146 void intel_connector_attach_encoder(struct intel_connector *connector,
147 struct intel_encoder *encoder)
148 {
149 connector->encoder = encoder;
150 drm_connector_attach_encoder(&connector->base, &encoder->base);
151 }
152
153 /*
154 * Simple connector->get_hw_state implementation for encoders that support only
155 * one connector and no cloning and hence the encoder state determines the state
156 * of the connector.
157 */
intel_connector_get_hw_state(struct intel_connector * connector)158 bool intel_connector_get_hw_state(struct intel_connector *connector)
159 {
160 enum pipe pipe = 0;
161 struct intel_encoder *encoder = connector->encoder;
162
163 return encoder->get_hw_state(encoder, &pipe);
164 }
165
intel_connector_get_pipe(struct intel_connector * connector)166 enum pipe intel_connector_get_pipe(struct intel_connector *connector)
167 {
168 struct drm_device *dev = connector->base.dev;
169
170 WARN_ON(!drm_modeset_is_locked(&dev->mode_config.connection_mutex));
171
172 if (!connector->base.state->crtc)
173 return INVALID_PIPE;
174
175 return to_intel_crtc(connector->base.state->crtc)->pipe;
176 }
177
178 /**
179 * intel_connector_update_modes - update connector from edid
180 * @connector: DRM connector device to use
181 * @edid: previously read EDID information
182 */
intel_connector_update_modes(struct drm_connector * connector,struct edid * edid)183 int intel_connector_update_modes(struct drm_connector *connector,
184 struct edid *edid)
185 {
186 int ret;
187
188 drm_connector_update_edid_property(connector, edid);
189 ret = drm_add_edid_modes(connector, edid);
190
191 return ret;
192 }
193
194 /**
195 * intel_ddc_get_modes - get modelist from monitor
196 * @connector: DRM connector device to use
197 * @adapter: i2c adapter
198 *
199 * Fetch the EDID information from @connector using the DDC bus.
200 */
intel_ddc_get_modes(struct drm_connector * connector,struct i2c_adapter * adapter)201 int intel_ddc_get_modes(struct drm_connector *connector,
202 struct i2c_adapter *adapter)
203 {
204 struct edid *edid;
205 int ret;
206
207 edid = drm_get_edid(connector, adapter);
208 if (!edid)
209 return 0;
210
211 ret = intel_connector_update_modes(connector, edid);
212 kfree(edid);
213
214 return ret;
215 }
216
217 static const struct drm_prop_enum_list force_audio_names[] = {
218 { HDMI_AUDIO_OFF_DVI, "force-dvi" },
219 { HDMI_AUDIO_OFF, "off" },
220 { HDMI_AUDIO_AUTO, "auto" },
221 { HDMI_AUDIO_ON, "on" },
222 };
223
224 void
intel_attach_force_audio_property(struct drm_connector * connector)225 intel_attach_force_audio_property(struct drm_connector *connector)
226 {
227 struct drm_device *dev = connector->dev;
228 struct drm_i915_private *dev_priv = to_i915(dev);
229 struct drm_property *prop;
230
231 prop = dev_priv->force_audio_property;
232 if (prop == NULL) {
233 prop = drm_property_create_enum(dev, 0,
234 "audio",
235 force_audio_names,
236 ARRAY_SIZE(force_audio_names));
237 if (prop == NULL)
238 return;
239
240 dev_priv->force_audio_property = prop;
241 }
242 drm_object_attach_property(&connector->base, prop, 0);
243 }
244
245 static const struct drm_prop_enum_list broadcast_rgb_names[] = {
246 { INTEL_BROADCAST_RGB_AUTO, "Automatic" },
247 { INTEL_BROADCAST_RGB_FULL, "Full" },
248 { INTEL_BROADCAST_RGB_LIMITED, "Limited 16:235" },
249 };
250
251 void
intel_attach_broadcast_rgb_property(struct drm_connector * connector)252 intel_attach_broadcast_rgb_property(struct drm_connector *connector)
253 {
254 struct drm_device *dev = connector->dev;
255 struct drm_i915_private *dev_priv = to_i915(dev);
256 struct drm_property *prop;
257
258 prop = dev_priv->broadcast_rgb_property;
259 if (prop == NULL) {
260 prop = drm_property_create_enum(dev, DRM_MODE_PROP_ENUM,
261 "Broadcast RGB",
262 broadcast_rgb_names,
263 ARRAY_SIZE(broadcast_rgb_names));
264 if (prop == NULL)
265 return;
266
267 dev_priv->broadcast_rgb_property = prop;
268 }
269
270 drm_object_attach_property(&connector->base, prop, 0);
271 }
272
273 void
intel_attach_aspect_ratio_property(struct drm_connector * connector)274 intel_attach_aspect_ratio_property(struct drm_connector *connector)
275 {
276 if (!drm_mode_create_aspect_ratio_property(connector->dev))
277 drm_object_attach_property(&connector->base,
278 connector->dev->mode_config.aspect_ratio_property,
279 DRM_MODE_PICTURE_ASPECT_NONE);
280 }
281
282 void
intel_attach_colorspace_property(struct drm_connector * connector)283 intel_attach_colorspace_property(struct drm_connector *connector)
284 {
285 switch (connector->connector_type) {
286 case DRM_MODE_CONNECTOR_HDMIA:
287 case DRM_MODE_CONNECTOR_HDMIB:
288 if (drm_mode_create_hdmi_colorspace_property(connector))
289 return;
290 break;
291 case DRM_MODE_CONNECTOR_DisplayPort:
292 case DRM_MODE_CONNECTOR_eDP:
293 if (drm_mode_create_dp_colorspace_property(connector))
294 return;
295 break;
296 default:
297 DRM_DEBUG_KMS("Colorspace property not supported\n");
298 return;
299 }
300
301 drm_object_attach_property(&connector->base,
302 connector->colorspace_property, 0);
303 }
304