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 #include <drm/drm_probe_helper.h>
32
33 #include "i915_drv.h"
34 #include "intel_backlight.h"
35 #include "intel_connector.h"
36 #include "intel_display_debugfs.h"
37 #include "intel_display_types.h"
38 #include "intel_hdcp.h"
39 #include "intel_panel.h"
40
intel_connector_modeset_retry_work_fn(struct work_struct * work)41 static void intel_connector_modeset_retry_work_fn(struct work_struct *work)
42 {
43 struct intel_connector *connector = container_of(work, typeof(*connector),
44 modeset_retry_work);
45 struct intel_display *display = to_intel_display(connector);
46
47 drm_dbg_kms(display->drm, "[CONNECTOR:%d:%s]\n", connector->base.base.id,
48 connector->base.name);
49
50 /* Grab the locks before changing connector property*/
51 mutex_lock(&display->drm->mode_config.mutex);
52 /* Set connector link status to BAD and send a Uevent to notify
53 * userspace to do a modeset.
54 */
55 drm_connector_set_link_status_property(&connector->base,
56 DRM_MODE_LINK_STATUS_BAD);
57 mutex_unlock(&display->drm->mode_config.mutex);
58 /* Send Hotplug uevent so userspace can reprobe */
59 drm_kms_helper_connector_hotplug_event(&connector->base);
60
61 drm_connector_put(&connector->base);
62 }
63
intel_connector_queue_modeset_retry_work(struct intel_connector * connector)64 void intel_connector_queue_modeset_retry_work(struct intel_connector *connector)
65 {
66 struct drm_i915_private *i915 = to_i915(connector->base.dev);
67
68 drm_connector_get(&connector->base);
69 if (!queue_work(i915->unordered_wq, &connector->modeset_retry_work))
70 drm_connector_put(&connector->base);
71 }
72
intel_connector_cancel_modeset_retry_work(struct intel_connector * connector)73 void intel_connector_cancel_modeset_retry_work(struct intel_connector *connector)
74 {
75 if (cancel_work_sync(&connector->modeset_retry_work))
76 drm_connector_put(&connector->base);
77 }
78
intel_connector_init(struct intel_connector * connector)79 int intel_connector_init(struct intel_connector *connector)
80 {
81 struct intel_digital_connector_state *conn_state;
82
83 /*
84 * Allocate enough memory to hold intel_digital_connector_state,
85 * This might be a few bytes too many, but for connectors that don't
86 * need it we'll free the state and allocate a smaller one on the first
87 * successful commit anyway.
88 */
89 conn_state = kzalloc(sizeof(*conn_state), GFP_KERNEL);
90 if (!conn_state)
91 return -ENOMEM;
92
93 __drm_atomic_helper_connector_reset(&connector->base,
94 &conn_state->base);
95
96 intel_panel_init_alloc(connector);
97
98 INIT_WORK(&connector->modeset_retry_work,
99 intel_connector_modeset_retry_work_fn);
100
101 return 0;
102 }
103
intel_connector_alloc(void)104 struct intel_connector *intel_connector_alloc(void)
105 {
106 struct intel_connector *connector;
107
108 connector = kzalloc(sizeof(*connector), GFP_KERNEL);
109 if (!connector)
110 return NULL;
111
112 if (intel_connector_init(connector) < 0) {
113 kfree(connector);
114 return NULL;
115 }
116
117 return connector;
118 }
119
120 /*
121 * Free the bits allocated by intel_connector_alloc.
122 * This should only be used after intel_connector_alloc has returned
123 * successfully, and before drm_connector_init returns successfully.
124 * Otherwise the destroy callbacks for the connector and the state should
125 * take care of proper cleanup/free (see intel_connector_destroy).
126 */
intel_connector_free(struct intel_connector * connector)127 void intel_connector_free(struct intel_connector *connector)
128 {
129 kfree(to_intel_digital_connector_state(connector->base.state));
130 kfree(connector);
131 }
132
133 /*
134 * Connector type independent destroy hook for drm_connector_funcs.
135 */
intel_connector_destroy(struct drm_connector * connector)136 void intel_connector_destroy(struct drm_connector *connector)
137 {
138 struct intel_connector *intel_connector = to_intel_connector(connector);
139
140 drm_edid_free(intel_connector->detect_edid);
141
142 intel_hdcp_cleanup(intel_connector);
143
144 intel_panel_fini(intel_connector);
145
146 drm_connector_cleanup(connector);
147
148 if (intel_connector->mst.port)
149 drm_dp_mst_put_port_malloc(intel_connector->mst.port);
150
151 kfree(connector);
152 }
153
intel_connector_register(struct drm_connector * connector)154 int intel_connector_register(struct drm_connector *connector)
155 {
156 struct intel_connector *intel_connector = to_intel_connector(connector);
157 int ret;
158
159 ret = intel_backlight_device_register(intel_connector);
160 if (ret)
161 goto err;
162
163 if (i915_inject_probe_failure(to_i915(connector->dev))) {
164 ret = -EFAULT;
165 goto err_backlight;
166 }
167
168 intel_connector_debugfs_add(intel_connector);
169
170 return 0;
171
172 err_backlight:
173 intel_backlight_device_unregister(intel_connector);
174 err:
175 return ret;
176 }
177
intel_connector_unregister(struct drm_connector * connector)178 void intel_connector_unregister(struct drm_connector *connector)
179 {
180 struct intel_connector *intel_connector = to_intel_connector(connector);
181
182 intel_backlight_device_unregister(intel_connector);
183 }
184
intel_connector_attach_encoder(struct intel_connector * connector,struct intel_encoder * encoder)185 void intel_connector_attach_encoder(struct intel_connector *connector,
186 struct intel_encoder *encoder)
187 {
188 connector->encoder = encoder;
189 drm_connector_attach_encoder(&connector->base, &encoder->base);
190 }
191
192 /*
193 * Simple connector->get_hw_state implementation for encoders that support only
194 * one connector and no cloning and hence the encoder state determines the state
195 * of the connector.
196 */
intel_connector_get_hw_state(struct intel_connector * connector)197 bool intel_connector_get_hw_state(struct intel_connector *connector)
198 {
199 enum pipe pipe = 0;
200 struct intel_encoder *encoder = intel_attached_encoder(connector);
201
202 return encoder->get_hw_state(encoder, &pipe);
203 }
204
intel_connector_get_pipe(struct intel_connector * connector)205 enum pipe intel_connector_get_pipe(struct intel_connector *connector)
206 {
207 struct drm_device *dev = connector->base.dev;
208
209 drm_WARN_ON(dev,
210 !drm_modeset_is_locked(&dev->mode_config.connection_mutex));
211
212 if (!connector->base.state->crtc)
213 return INVALID_PIPE;
214
215 return to_intel_crtc(connector->base.state->crtc)->pipe;
216 }
217
218 /**
219 * intel_connector_update_modes - update connector from edid
220 * @connector: DRM connector device to use
221 * @drm_edid: previously read EDID information
222 */
intel_connector_update_modes(struct drm_connector * connector,const struct drm_edid * drm_edid)223 int intel_connector_update_modes(struct drm_connector *connector,
224 const struct drm_edid *drm_edid)
225 {
226 int ret;
227
228 drm_edid_connector_update(connector, drm_edid);
229 ret = drm_edid_connector_add_modes(connector);
230
231 return ret;
232 }
233
234 /**
235 * intel_ddc_get_modes - get modelist from monitor
236 * @connector: DRM connector device to use
237 * @ddc: DDC bus i2c adapter
238 *
239 * Fetch the EDID information from @connector using the DDC bus.
240 */
intel_ddc_get_modes(struct drm_connector * connector,struct i2c_adapter * ddc)241 int intel_ddc_get_modes(struct drm_connector *connector,
242 struct i2c_adapter *ddc)
243 {
244 const struct drm_edid *drm_edid;
245 int ret;
246
247 drm_edid = drm_edid_read_ddc(connector, ddc);
248 if (!drm_edid)
249 return 0;
250
251 ret = intel_connector_update_modes(connector, drm_edid);
252 drm_edid_free(drm_edid);
253
254 return ret;
255 }
256
257 static const struct drm_prop_enum_list force_audio_names[] = {
258 { HDMI_AUDIO_OFF_DVI, "force-dvi" },
259 { HDMI_AUDIO_OFF, "off" },
260 { HDMI_AUDIO_AUTO, "auto" },
261 { HDMI_AUDIO_ON, "on" },
262 };
263
264 void
intel_attach_force_audio_property(struct drm_connector * connector)265 intel_attach_force_audio_property(struct drm_connector *connector)
266 {
267 struct drm_device *dev = connector->dev;
268 struct drm_i915_private *dev_priv = to_i915(dev);
269 struct drm_property *prop;
270
271 prop = dev_priv->display.properties.force_audio;
272 if (prop == NULL) {
273 prop = drm_property_create_enum(dev, 0,
274 "audio",
275 force_audio_names,
276 ARRAY_SIZE(force_audio_names));
277 if (prop == NULL)
278 return;
279
280 dev_priv->display.properties.force_audio = prop;
281 }
282 drm_object_attach_property(&connector->base, prop, 0);
283 }
284
285 static const struct drm_prop_enum_list broadcast_rgb_names[] = {
286 { INTEL_BROADCAST_RGB_AUTO, "Automatic" },
287 { INTEL_BROADCAST_RGB_FULL, "Full" },
288 { INTEL_BROADCAST_RGB_LIMITED, "Limited 16:235" },
289 };
290
291 void
intel_attach_broadcast_rgb_property(struct drm_connector * connector)292 intel_attach_broadcast_rgb_property(struct drm_connector *connector)
293 {
294 struct drm_device *dev = connector->dev;
295 struct drm_i915_private *dev_priv = to_i915(dev);
296 struct drm_property *prop;
297
298 prop = dev_priv->display.properties.broadcast_rgb;
299 if (prop == NULL) {
300 prop = drm_property_create_enum(dev, DRM_MODE_PROP_ENUM,
301 "Broadcast RGB",
302 broadcast_rgb_names,
303 ARRAY_SIZE(broadcast_rgb_names));
304 if (prop == NULL)
305 return;
306
307 dev_priv->display.properties.broadcast_rgb = prop;
308 }
309
310 drm_object_attach_property(&connector->base, prop, 0);
311 }
312
313 void
intel_attach_aspect_ratio_property(struct drm_connector * connector)314 intel_attach_aspect_ratio_property(struct drm_connector *connector)
315 {
316 if (!drm_mode_create_aspect_ratio_property(connector->dev))
317 drm_object_attach_property(&connector->base,
318 connector->dev->mode_config.aspect_ratio_property,
319 DRM_MODE_PICTURE_ASPECT_NONE);
320 }
321
322 void
intel_attach_hdmi_colorspace_property(struct drm_connector * connector)323 intel_attach_hdmi_colorspace_property(struct drm_connector *connector)
324 {
325 if (!drm_mode_create_hdmi_colorspace_property(connector, 0))
326 drm_connector_attach_colorspace_property(connector);
327 }
328
329 void
intel_attach_dp_colorspace_property(struct drm_connector * connector)330 intel_attach_dp_colorspace_property(struct drm_connector *connector)
331 {
332 if (!drm_mode_create_dp_colorspace_property(connector, 0))
333 drm_connector_attach_colorspace_property(connector);
334 }
335
336 void
intel_attach_scaling_mode_property(struct drm_connector * connector)337 intel_attach_scaling_mode_property(struct drm_connector *connector)
338 {
339 struct drm_i915_private *i915 = to_i915(connector->dev);
340 u32 scaling_modes;
341
342 scaling_modes = BIT(DRM_MODE_SCALE_ASPECT) |
343 BIT(DRM_MODE_SCALE_FULLSCREEN);
344
345 /* On GMCH platforms borders are only possible on the LVDS port */
346 if (!HAS_GMCH(i915) || connector->connector_type == DRM_MODE_CONNECTOR_LVDS)
347 scaling_modes |= BIT(DRM_MODE_SCALE_CENTER);
348
349 drm_connector_attach_scaling_mode_property(connector, scaling_modes);
350
351 connector->state->scaling_mode = DRM_MODE_SCALE_ASPECT;
352 }
353