1 /*
2 * Copyright © 2008 Intel Corporation
3 * 2014 Red Hat Inc.
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice (including the next
13 * paragraph) shall be included in all copies or substantial portions of the
14 * Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
22 * IN THE SOFTWARE.
23 *
24 */
25
26 #include <drm/drmP.h>
27 #include "i915_drv.h"
28 #include "intel_drv.h"
29 #include <drm/drm_atomic_helper.h>
30 #include <drm/drm_crtc_helper.h>
31 #include <drm/drm_edid.h>
32
intel_dp_mst_compute_config(struct intel_encoder * encoder,struct intel_crtc_state * pipe_config,struct drm_connector_state * conn_state)33 static bool intel_dp_mst_compute_config(struct intel_encoder *encoder,
34 struct intel_crtc_state *pipe_config,
35 struct drm_connector_state *conn_state)
36 {
37 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
38 struct intel_digital_port *intel_dig_port = intel_mst->primary;
39 struct intel_dp *intel_dp = &intel_dig_port->dp;
40 struct intel_connector *connector =
41 to_intel_connector(conn_state->connector);
42 struct drm_atomic_state *state = pipe_config->base.state;
43 int bpp;
44 int lane_count, slots;
45 const struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode;
46 int mst_pbn;
47 bool reduce_m_n = drm_dp_has_quirk(&intel_dp->desc,
48 DP_DPCD_QUIRK_LIMITED_M_N);
49
50 pipe_config->has_pch_encoder = false;
51 bpp = 24;
52 if (intel_dp->compliance.test_data.bpc) {
53 bpp = intel_dp->compliance.test_data.bpc * 3;
54 DRM_DEBUG_KMS("Setting pipe bpp to %d\n",
55 bpp);
56 }
57 /*
58 * for MST we always configure max link bw - the spec doesn't
59 * seem to suggest we should do otherwise.
60 */
61 lane_count = intel_dp_max_lane_count(intel_dp);
62
63 pipe_config->lane_count = lane_count;
64
65 pipe_config->pipe_bpp = bpp;
66
67 pipe_config->port_clock = intel_dp_max_link_rate(intel_dp);
68
69 if (drm_dp_mst_port_has_audio(&intel_dp->mst_mgr, connector->port))
70 pipe_config->has_audio = true;
71
72 mst_pbn = drm_dp_calc_pbn_mode(adjusted_mode->crtc_clock, bpp);
73 pipe_config->pbn = mst_pbn;
74
75 slots = drm_dp_atomic_find_vcpi_slots(state, &intel_dp->mst_mgr,
76 connector->port, mst_pbn);
77 if (slots < 0) {
78 DRM_DEBUG_KMS("failed finding vcpi slots:%d\n", slots);
79 return false;
80 }
81
82 intel_link_compute_m_n(bpp, lane_count,
83 adjusted_mode->crtc_clock,
84 pipe_config->port_clock,
85 &pipe_config->dp_m_n,
86 reduce_m_n);
87
88 pipe_config->dp_m_n.tu = slots;
89
90 return true;
91 }
92
intel_dp_mst_atomic_check(struct drm_connector * connector,struct drm_connector_state * new_conn_state)93 static int intel_dp_mst_atomic_check(struct drm_connector *connector,
94 struct drm_connector_state *new_conn_state)
95 {
96 struct drm_atomic_state *state = new_conn_state->state;
97 struct drm_connector_state *old_conn_state;
98 struct drm_crtc *old_crtc;
99 struct drm_crtc_state *crtc_state;
100 int slots, ret = 0;
101
102 old_conn_state = drm_atomic_get_old_connector_state(state, connector);
103 old_crtc = old_conn_state->crtc;
104 if (!old_crtc)
105 return ret;
106
107 crtc_state = drm_atomic_get_new_crtc_state(state, old_crtc);
108 slots = to_intel_crtc_state(crtc_state)->dp_m_n.tu;
109 if (drm_atomic_crtc_needs_modeset(crtc_state) && slots > 0) {
110 struct drm_dp_mst_topology_mgr *mgr;
111 struct drm_encoder *old_encoder;
112
113 old_encoder = old_conn_state->best_encoder;
114 mgr = &enc_to_mst(old_encoder)->primary->dp.mst_mgr;
115
116 ret = drm_dp_atomic_release_vcpi_slots(state, mgr, slots);
117 if (ret)
118 DRM_DEBUG_KMS("failed releasing %d vcpi slots:%d\n", slots, ret);
119 else
120 to_intel_crtc_state(crtc_state)->dp_m_n.tu = 0;
121 }
122 return ret;
123 }
124
intel_mst_disable_dp(struct intel_encoder * encoder,const struct intel_crtc_state * old_crtc_state,const struct drm_connector_state * old_conn_state)125 static void intel_mst_disable_dp(struct intel_encoder *encoder,
126 const struct intel_crtc_state *old_crtc_state,
127 const struct drm_connector_state *old_conn_state)
128 {
129 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
130 struct intel_digital_port *intel_dig_port = intel_mst->primary;
131 struct intel_dp *intel_dp = &intel_dig_port->dp;
132 struct intel_connector *connector =
133 to_intel_connector(old_conn_state->connector);
134 int ret;
135
136 DRM_DEBUG_KMS("active links %d\n", intel_dp->active_mst_links);
137
138 drm_dp_mst_reset_vcpi_slots(&intel_dp->mst_mgr, connector->port);
139
140 ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
141 if (ret) {
142 DRM_ERROR("failed to update payload %d\n", ret);
143 }
144 if (old_crtc_state->has_audio)
145 intel_audio_codec_disable(encoder);
146 }
147
intel_mst_post_disable_dp(struct intel_encoder * encoder,const struct intel_crtc_state * old_crtc_state,const struct drm_connector_state * old_conn_state)148 static void intel_mst_post_disable_dp(struct intel_encoder *encoder,
149 const struct intel_crtc_state *old_crtc_state,
150 const struct drm_connector_state *old_conn_state)
151 {
152 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
153 struct intel_digital_port *intel_dig_port = intel_mst->primary;
154 struct intel_dp *intel_dp = &intel_dig_port->dp;
155 struct intel_connector *connector =
156 to_intel_connector(old_conn_state->connector);
157
158 /* this can fail */
159 drm_dp_check_act_status(&intel_dp->mst_mgr);
160 /* and this can also fail */
161 drm_dp_update_payload_part2(&intel_dp->mst_mgr);
162
163 drm_dp_mst_deallocate_vcpi(&intel_dp->mst_mgr, connector->port);
164
165 /*
166 * Power down mst path before disabling the port, otherwise we end
167 * up getting interrupts from the sink upon detecting link loss.
168 */
169 drm_dp_send_power_updown_phy(&intel_dp->mst_mgr, connector->port,
170 false);
171
172 intel_dp->active_mst_links--;
173
174 intel_mst->connector = NULL;
175 if (intel_dp->active_mst_links == 0) {
176 intel_dig_port->base.post_disable(&intel_dig_port->base,
177 NULL, NULL);
178 }
179 DRM_DEBUG_KMS("active links %d\n", intel_dp->active_mst_links);
180 }
181
intel_mst_pre_enable_dp(struct intel_encoder * encoder,const struct intel_crtc_state * pipe_config,const struct drm_connector_state * conn_state)182 static void intel_mst_pre_enable_dp(struct intel_encoder *encoder,
183 const struct intel_crtc_state *pipe_config,
184 const struct drm_connector_state *conn_state)
185 {
186 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
187 struct intel_digital_port *intel_dig_port = intel_mst->primary;
188 struct intel_dp *intel_dp = &intel_dig_port->dp;
189 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
190 enum port port = intel_dig_port->port;
191 struct intel_connector *connector =
192 to_intel_connector(conn_state->connector);
193 int ret;
194 uint32_t temp;
195
196 /* MST encoders are bound to a crtc, not to a connector,
197 * force the mapping here for get_hw_state.
198 */
199 connector->encoder = encoder;
200 intel_mst->connector = connector;
201
202 DRM_DEBUG_KMS("active links %d\n", intel_dp->active_mst_links);
203
204 drm_dp_send_power_updown_phy(&intel_dp->mst_mgr, connector->port, true);
205 if (intel_dp->active_mst_links == 0)
206 intel_dig_port->base.pre_enable(&intel_dig_port->base,
207 pipe_config, NULL);
208
209 ret = drm_dp_mst_allocate_vcpi(&intel_dp->mst_mgr,
210 connector->port,
211 pipe_config->pbn,
212 pipe_config->dp_m_n.tu);
213 if (ret == false) {
214 DRM_ERROR("failed to allocate vcpi\n");
215 return;
216 }
217
218
219 intel_dp->active_mst_links++;
220 temp = I915_READ(DP_TP_STATUS(port));
221 I915_WRITE(DP_TP_STATUS(port), temp);
222
223 ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
224 }
225
intel_mst_enable_dp(struct intel_encoder * encoder,const struct intel_crtc_state * pipe_config,const struct drm_connector_state * conn_state)226 static void intel_mst_enable_dp(struct intel_encoder *encoder,
227 const struct intel_crtc_state *pipe_config,
228 const struct drm_connector_state *conn_state)
229 {
230 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
231 struct intel_digital_port *intel_dig_port = intel_mst->primary;
232 struct intel_dp *intel_dp = &intel_dig_port->dp;
233 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
234 enum port port = intel_dig_port->port;
235 int ret;
236
237 DRM_DEBUG_KMS("active links %d\n", intel_dp->active_mst_links);
238
239 if (intel_wait_for_register(dev_priv,
240 DP_TP_STATUS(port),
241 DP_TP_STATUS_ACT_SENT,
242 DP_TP_STATUS_ACT_SENT,
243 1))
244 DRM_ERROR("Timed out waiting for ACT sent\n");
245
246 ret = drm_dp_check_act_status(&intel_dp->mst_mgr);
247
248 ret = drm_dp_update_payload_part2(&intel_dp->mst_mgr);
249 if (pipe_config->has_audio)
250 intel_audio_codec_enable(encoder, pipe_config, conn_state);
251 }
252
intel_dp_mst_enc_get_hw_state(struct intel_encoder * encoder,enum i915_pipe * pipe)253 static bool intel_dp_mst_enc_get_hw_state(struct intel_encoder *encoder,
254 enum i915_pipe *pipe)
255 {
256 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
257 *pipe = intel_mst->pipe;
258 if (intel_mst->connector)
259 return true;
260 return false;
261 }
262
intel_dp_mst_enc_get_config(struct intel_encoder * encoder,struct intel_crtc_state * pipe_config)263 static void intel_dp_mst_enc_get_config(struct intel_encoder *encoder,
264 struct intel_crtc_state *pipe_config)
265 {
266 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
267 struct intel_digital_port *intel_dig_port = intel_mst->primary;
268 struct intel_crtc *crtc = to_intel_crtc(pipe_config->base.crtc);
269 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
270 enum transcoder cpu_transcoder = pipe_config->cpu_transcoder;
271 u32 temp, flags = 0;
272
273 pipe_config->has_audio =
274 intel_ddi_is_audio_enabled(dev_priv, crtc);
275
276 temp = I915_READ(TRANS_DDI_FUNC_CTL(cpu_transcoder));
277 if (temp & TRANS_DDI_PHSYNC)
278 flags |= DRM_MODE_FLAG_PHSYNC;
279 else
280 flags |= DRM_MODE_FLAG_NHSYNC;
281 if (temp & TRANS_DDI_PVSYNC)
282 flags |= DRM_MODE_FLAG_PVSYNC;
283 else
284 flags |= DRM_MODE_FLAG_NVSYNC;
285
286 switch (temp & TRANS_DDI_BPC_MASK) {
287 case TRANS_DDI_BPC_6:
288 pipe_config->pipe_bpp = 18;
289 break;
290 case TRANS_DDI_BPC_8:
291 pipe_config->pipe_bpp = 24;
292 break;
293 case TRANS_DDI_BPC_10:
294 pipe_config->pipe_bpp = 30;
295 break;
296 case TRANS_DDI_BPC_12:
297 pipe_config->pipe_bpp = 36;
298 break;
299 default:
300 break;
301 }
302 pipe_config->base.adjusted_mode.flags |= flags;
303
304 pipe_config->lane_count =
305 ((temp & DDI_PORT_WIDTH_MASK) >> DDI_PORT_WIDTH_SHIFT) + 1;
306
307 intel_dp_get_m_n(crtc, pipe_config);
308
309 intel_ddi_clock_get(&intel_dig_port->base, pipe_config);
310 }
311
intel_dp_mst_get_ddc_modes(struct drm_connector * connector)312 static int intel_dp_mst_get_ddc_modes(struct drm_connector *connector)
313 {
314 struct intel_connector *intel_connector = to_intel_connector(connector);
315 struct intel_dp *intel_dp = intel_connector->mst_port;
316 struct edid *edid;
317 int ret;
318
319 if (!intel_dp) {
320 return intel_connector_update_modes(connector, NULL);
321 }
322
323 edid = drm_dp_mst_get_edid(connector, &intel_dp->mst_mgr, intel_connector->port);
324 ret = intel_connector_update_modes(connector, edid);
325 kfree(edid);
326
327 return ret;
328 }
329
330 static enum drm_connector_status
intel_dp_mst_detect(struct drm_connector * connector,bool force)331 intel_dp_mst_detect(struct drm_connector *connector, bool force)
332 {
333 struct intel_connector *intel_connector = to_intel_connector(connector);
334 struct intel_dp *intel_dp = intel_connector->mst_port;
335
336 if (!intel_dp)
337 return connector_status_disconnected;
338 return drm_dp_mst_detect_port(connector, &intel_dp->mst_mgr, intel_connector->port);
339 }
340
341 static void
intel_dp_mst_connector_destroy(struct drm_connector * connector)342 intel_dp_mst_connector_destroy(struct drm_connector *connector)
343 {
344 struct intel_connector *intel_connector = to_intel_connector(connector);
345
346 if (!IS_ERR_OR_NULL(intel_connector->edid))
347 kfree(intel_connector->edid);
348
349 drm_connector_cleanup(connector);
350 kfree(connector);
351 }
352
353 static const struct drm_connector_funcs intel_dp_mst_connector_funcs = {
354 .detect = intel_dp_mst_detect,
355 .fill_modes = drm_helper_probe_single_connector_modes,
356 .late_register = intel_connector_register,
357 .early_unregister = intel_connector_unregister,
358 .destroy = intel_dp_mst_connector_destroy,
359 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
360 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
361 };
362
intel_dp_mst_get_modes(struct drm_connector * connector)363 static int intel_dp_mst_get_modes(struct drm_connector *connector)
364 {
365 return intel_dp_mst_get_ddc_modes(connector);
366 }
367
368 static enum drm_mode_status
intel_dp_mst_mode_valid(struct drm_connector * connector,struct drm_display_mode * mode)369 intel_dp_mst_mode_valid(struct drm_connector *connector,
370 struct drm_display_mode *mode)
371 {
372 struct intel_connector *intel_connector = to_intel_connector(connector);
373 struct intel_dp *intel_dp = intel_connector->mst_port;
374 int max_dotclk = to_i915(connector->dev)->max_dotclk_freq;
375 int bpp = 24; /* MST uses fixed bpp */
376 int max_rate, mode_rate, max_lanes, max_link_clock;
377
378 if (!intel_dp)
379 return MODE_ERROR;
380
381 max_link_clock = intel_dp_max_link_rate(intel_dp);
382 max_lanes = intel_dp_max_lane_count(intel_dp);
383
384 max_rate = intel_dp_max_data_rate(max_link_clock, max_lanes);
385 mode_rate = intel_dp_link_required(mode->clock, bpp);
386
387 /* TODO - validate mode against available PBN for link */
388 if (mode->clock < 10000)
389 return MODE_CLOCK_LOW;
390
391 if (mode->flags & DRM_MODE_FLAG_DBLCLK)
392 return MODE_H_ILLEGAL;
393
394 if (mode_rate > max_rate || mode->clock > max_dotclk)
395 return MODE_CLOCK_HIGH;
396
397 return MODE_OK;
398 }
399
intel_mst_atomic_best_encoder(struct drm_connector * connector,struct drm_connector_state * state)400 static struct drm_encoder *intel_mst_atomic_best_encoder(struct drm_connector *connector,
401 struct drm_connector_state *state)
402 {
403 struct intel_connector *intel_connector = to_intel_connector(connector);
404 struct intel_dp *intel_dp = intel_connector->mst_port;
405 struct intel_crtc *crtc = to_intel_crtc(state->crtc);
406
407 if (!intel_dp)
408 return NULL;
409 return &intel_dp->mst_encoders[crtc->pipe]->base.base;
410 }
411
intel_mst_best_encoder(struct drm_connector * connector)412 static struct drm_encoder *intel_mst_best_encoder(struct drm_connector *connector)
413 {
414 struct intel_connector *intel_connector = to_intel_connector(connector);
415 struct intel_dp *intel_dp = intel_connector->mst_port;
416 if (!intel_dp)
417 return NULL;
418 return &intel_dp->mst_encoders[0]->base.base;
419 }
420
421 static const struct drm_connector_helper_funcs intel_dp_mst_connector_helper_funcs = {
422 .get_modes = intel_dp_mst_get_modes,
423 .mode_valid = intel_dp_mst_mode_valid,
424 .atomic_best_encoder = intel_mst_atomic_best_encoder,
425 .best_encoder = intel_mst_best_encoder,
426 .atomic_check = intel_dp_mst_atomic_check,
427 };
428
intel_dp_mst_encoder_destroy(struct drm_encoder * encoder)429 static void intel_dp_mst_encoder_destroy(struct drm_encoder *encoder)
430 {
431 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
432
433 drm_encoder_cleanup(encoder);
434 kfree(intel_mst);
435 }
436
437 static const struct drm_encoder_funcs intel_dp_mst_enc_funcs = {
438 .destroy = intel_dp_mst_encoder_destroy,
439 };
440
intel_dp_mst_get_hw_state(struct intel_connector * connector)441 static bool intel_dp_mst_get_hw_state(struct intel_connector *connector)
442 {
443 if (connector->encoder && connector->base.state->crtc) {
444 enum i915_pipe pipe;
445 if (!connector->encoder->get_hw_state(connector->encoder, &pipe))
446 return false;
447 return true;
448 }
449 return false;
450 }
451
intel_dp_add_mst_connector(struct drm_dp_mst_topology_mgr * mgr,struct drm_dp_mst_port * port,const char * pathprop)452 static struct drm_connector *intel_dp_add_mst_connector(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port, const char *pathprop)
453 {
454 struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr);
455 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
456 struct drm_device *dev = intel_dig_port->base.base.dev;
457 struct drm_i915_private *dev_priv = to_i915(dev);
458 struct intel_connector *intel_connector;
459 struct drm_connector *connector;
460 enum i915_pipe pipe;
461 int ret;
462
463 intel_connector = intel_connector_alloc();
464 if (!intel_connector)
465 return NULL;
466
467 connector = &intel_connector->base;
468 ret = drm_connector_init(dev, connector, &intel_dp_mst_connector_funcs,
469 DRM_MODE_CONNECTOR_DisplayPort);
470 if (ret) {
471 intel_connector_free(intel_connector);
472 return NULL;
473 }
474
475 drm_connector_helper_add(connector, &intel_dp_mst_connector_helper_funcs);
476
477 intel_connector->get_hw_state = intel_dp_mst_get_hw_state;
478 intel_connector->mst_port = intel_dp;
479 intel_connector->port = port;
480
481 for_each_pipe(dev_priv, pipe) {
482 struct drm_encoder *enc =
483 &intel_dp->mst_encoders[pipe]->base.base;
484
485 ret = drm_mode_connector_attach_encoder(&intel_connector->base,
486 enc);
487 if (ret)
488 goto err;
489 }
490
491 drm_object_attach_property(&connector->base, dev->mode_config.path_property, 0);
492 drm_object_attach_property(&connector->base, dev->mode_config.tile_property, 0);
493
494 ret = drm_mode_connector_set_path_property(connector, pathprop);
495 if (ret)
496 goto err;
497
498 return connector;
499
500 err:
501 drm_connector_cleanup(connector);
502 return NULL;
503 }
504
intel_dp_register_mst_connector(struct drm_connector * connector)505 static void intel_dp_register_mst_connector(struct drm_connector *connector)
506 {
507 struct drm_i915_private *dev_priv = to_i915(connector->dev);
508
509 if (dev_priv->fbdev)
510 drm_fb_helper_add_one_connector(&dev_priv->fbdev->helper,
511 connector);
512
513 drm_connector_register(connector);
514 }
515
intel_dp_destroy_mst_connector(struct drm_dp_mst_topology_mgr * mgr,struct drm_connector * connector)516 static void intel_dp_destroy_mst_connector(struct drm_dp_mst_topology_mgr *mgr,
517 struct drm_connector *connector)
518 {
519 struct intel_connector *intel_connector = to_intel_connector(connector);
520 struct drm_i915_private *dev_priv = to_i915(connector->dev);
521
522 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", connector->base.id, connector->name);
523 drm_connector_unregister(connector);
524
525 if (dev_priv->fbdev)
526 drm_fb_helper_remove_one_connector(&dev_priv->fbdev->helper,
527 connector);
528 /* prevent race with the check in ->detect */
529 drm_modeset_lock(&connector->dev->mode_config.connection_mutex, NULL);
530 intel_connector->mst_port = NULL;
531 drm_modeset_unlock(&connector->dev->mode_config.connection_mutex);
532
533 drm_connector_unreference(connector);
534 }
535
intel_dp_mst_hotplug(struct drm_dp_mst_topology_mgr * mgr)536 static void intel_dp_mst_hotplug(struct drm_dp_mst_topology_mgr *mgr)
537 {
538 struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr);
539 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
540 struct drm_device *dev = intel_dig_port->base.base.dev;
541
542 drm_kms_helper_hotplug_event(dev);
543 }
544
545 static const struct drm_dp_mst_topology_cbs mst_cbs = {
546 .add_connector = intel_dp_add_mst_connector,
547 .register_connector = intel_dp_register_mst_connector,
548 .destroy_connector = intel_dp_destroy_mst_connector,
549 .hotplug = intel_dp_mst_hotplug,
550 };
551
552 static struct intel_dp_mst_encoder *
intel_dp_create_fake_mst_encoder(struct intel_digital_port * intel_dig_port,enum i915_pipe pipe)553 intel_dp_create_fake_mst_encoder(struct intel_digital_port *intel_dig_port, enum i915_pipe pipe)
554 {
555 struct intel_dp_mst_encoder *intel_mst;
556 struct intel_encoder *intel_encoder;
557 struct drm_device *dev = intel_dig_port->base.base.dev;
558
559 intel_mst = kzalloc(sizeof(*intel_mst), GFP_KERNEL);
560
561 if (!intel_mst)
562 return NULL;
563
564 intel_mst->pipe = pipe;
565 intel_encoder = &intel_mst->base;
566 intel_mst->primary = intel_dig_port;
567
568 drm_encoder_init(dev, &intel_encoder->base, &intel_dp_mst_enc_funcs,
569 DRM_MODE_ENCODER_DPMST, "DP-MST %c", pipe_name(pipe));
570
571 intel_encoder->type = INTEL_OUTPUT_DP_MST;
572 intel_encoder->power_domain = intel_dig_port->base.power_domain;
573 intel_encoder->port = intel_dig_port->port;
574 intel_encoder->crtc_mask = 0x7;
575 intel_encoder->cloneable = 0;
576
577 intel_encoder->compute_config = intel_dp_mst_compute_config;
578 intel_encoder->disable = intel_mst_disable_dp;
579 intel_encoder->post_disable = intel_mst_post_disable_dp;
580 intel_encoder->pre_enable = intel_mst_pre_enable_dp;
581 intel_encoder->enable = intel_mst_enable_dp;
582 intel_encoder->get_hw_state = intel_dp_mst_enc_get_hw_state;
583 intel_encoder->get_config = intel_dp_mst_enc_get_config;
584
585 return intel_mst;
586
587 }
588
589 static bool
intel_dp_create_fake_mst_encoders(struct intel_digital_port * intel_dig_port)590 intel_dp_create_fake_mst_encoders(struct intel_digital_port *intel_dig_port)
591 {
592 struct intel_dp *intel_dp = &intel_dig_port->dp;
593 struct drm_i915_private *dev_priv = to_i915(intel_dig_port->base.base.dev);
594 enum i915_pipe pipe;
595
596 for_each_pipe(dev_priv, pipe)
597 intel_dp->mst_encoders[pipe] = intel_dp_create_fake_mst_encoder(intel_dig_port, pipe);
598 return true;
599 }
600
601 int
intel_dp_mst_encoder_init(struct intel_digital_port * intel_dig_port,int conn_base_id)602 intel_dp_mst_encoder_init(struct intel_digital_port *intel_dig_port, int conn_base_id)
603 {
604 struct intel_dp *intel_dp = &intel_dig_port->dp;
605 struct drm_device *dev = intel_dig_port->base.base.dev;
606 int ret;
607
608 intel_dp->can_mst = true;
609 intel_dp->mst_mgr.cbs = &mst_cbs;
610
611 /* create encoders */
612 intel_dp_create_fake_mst_encoders(intel_dig_port);
613 ret = drm_dp_mst_topology_mgr_init(&intel_dp->mst_mgr, dev,
614 &intel_dp->aux, 16, 3, conn_base_id);
615 if (ret) {
616 intel_dp->can_mst = false;
617 return ret;
618 }
619 return 0;
620 }
621
622 void
intel_dp_mst_encoder_cleanup(struct intel_digital_port * intel_dig_port)623 intel_dp_mst_encoder_cleanup(struct intel_digital_port *intel_dig_port)
624 {
625 struct intel_dp *intel_dp = &intel_dig_port->dp;
626
627 if (!intel_dp->can_mst)
628 return;
629
630 drm_dp_mst_topology_mgr_destroy(&intel_dp->mst_mgr);
631 /* encoders will get killed by normal cleanup */
632 }
633