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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
33static 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
59
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
93static 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
125static void intel_mst_disable_dp(struct intel_encoder *encoder,
126 struct intel_crtc_state *old_crtc_state,
127 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("%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
148static void intel_mst_post_disable_dp(struct intel_encoder *encoder,
149 struct intel_crtc_state *old_crtc_state,
150 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 DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
159
160
161 drm_dp_check_act_status(&intel_dp->mst_mgr);
162
163 drm_dp_update_payload_part2(&intel_dp->mst_mgr);
164
165 drm_dp_mst_deallocate_vcpi(&intel_dp->mst_mgr, connector->port);
166
167 intel_dp->active_mst_links--;
168
169 intel_mst->connector = NULL;
170 if (intel_dp->active_mst_links == 0) {
171 intel_dig_port->base.post_disable(&intel_dig_port->base,
172 NULL, NULL);
173
174 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_OFF);
175 }
176}
177
178static void intel_mst_pre_enable_dp(struct intel_encoder *encoder,
179 struct intel_crtc_state *pipe_config,
180 struct drm_connector_state *conn_state)
181{
182 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
183 struct intel_digital_port *intel_dig_port = intel_mst->primary;
184 struct intel_dp *intel_dp = &intel_dig_port->dp;
185 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
186 enum port port = intel_dig_port->port;
187 struct intel_connector *connector =
188 to_intel_connector(conn_state->connector);
189 int ret;
190 uint32_t temp;
191
192
193
194
195 connector->encoder = encoder;
196 intel_mst->connector = connector;
197
198 DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
199
200 if (intel_dp->active_mst_links == 0)
201 intel_dig_port->base.pre_enable(&intel_dig_port->base,
202 pipe_config, NULL);
203
204 ret = drm_dp_mst_allocate_vcpi(&intel_dp->mst_mgr,
205 connector->port,
206 pipe_config->pbn,
207 pipe_config->dp_m_n.tu);
208 if (ret == false) {
209 DRM_ERROR("failed to allocate vcpi\n");
210 return;
211 }
212
213
214 intel_dp->active_mst_links++;
215 temp = I915_READ(DP_TP_STATUS(port));
216 I915_WRITE(DP_TP_STATUS(port), temp);
217
218 ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
219}
220
221static void intel_mst_enable_dp(struct intel_encoder *encoder,
222 struct intel_crtc_state *pipe_config,
223 struct drm_connector_state *conn_state)
224{
225 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
226 struct intel_digital_port *intel_dig_port = intel_mst->primary;
227 struct intel_dp *intel_dp = &intel_dig_port->dp;
228 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
229 enum port port = intel_dig_port->port;
230 int ret;
231
232 DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
233
234 if (intel_wait_for_register(dev_priv,
235 DP_TP_STATUS(port),
236 DP_TP_STATUS_ACT_SENT,
237 DP_TP_STATUS_ACT_SENT,
238 1))
239 DRM_ERROR("Timed out waiting for ACT sent\n");
240
241 ret = drm_dp_check_act_status(&intel_dp->mst_mgr);
242
243 ret = drm_dp_update_payload_part2(&intel_dp->mst_mgr);
244 if (pipe_config->has_audio)
245 intel_audio_codec_enable(encoder, pipe_config, conn_state);
246}
247
248static bool intel_dp_mst_enc_get_hw_state(struct intel_encoder *encoder,
249 enum pipe *pipe)
250{
251 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
252 *pipe = intel_mst->pipe;
253 if (intel_mst->connector)
254 return true;
255 return false;
256}
257
258static void intel_dp_mst_enc_get_config(struct intel_encoder *encoder,
259 struct intel_crtc_state *pipe_config)
260{
261 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
262 struct intel_digital_port *intel_dig_port = intel_mst->primary;
263 struct intel_crtc *crtc = to_intel_crtc(pipe_config->base.crtc);
264 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
265 enum transcoder cpu_transcoder = pipe_config->cpu_transcoder;
266 u32 temp, flags = 0;
267
268 pipe_config->has_audio =
269 intel_ddi_is_audio_enabled(dev_priv, crtc);
270
271 temp = I915_READ(TRANS_DDI_FUNC_CTL(cpu_transcoder));
272 if (temp & TRANS_DDI_PHSYNC)
273 flags |= DRM_MODE_FLAG_PHSYNC;
274 else
275 flags |= DRM_MODE_FLAG_NHSYNC;
276 if (temp & TRANS_DDI_PVSYNC)
277 flags |= DRM_MODE_FLAG_PVSYNC;
278 else
279 flags |= DRM_MODE_FLAG_NVSYNC;
280
281 switch (temp & TRANS_DDI_BPC_MASK) {
282 case TRANS_DDI_BPC_6:
283 pipe_config->pipe_bpp = 18;
284 break;
285 case TRANS_DDI_BPC_8:
286 pipe_config->pipe_bpp = 24;
287 break;
288 case TRANS_DDI_BPC_10:
289 pipe_config->pipe_bpp = 30;
290 break;
291 case TRANS_DDI_BPC_12:
292 pipe_config->pipe_bpp = 36;
293 break;
294 default:
295 break;
296 }
297 pipe_config->base.adjusted_mode.flags |= flags;
298
299 pipe_config->lane_count =
300 ((temp & DDI_PORT_WIDTH_MASK) >> DDI_PORT_WIDTH_SHIFT) + 1;
301
302 intel_dp_get_m_n(crtc, pipe_config);
303
304 intel_ddi_clock_get(&intel_dig_port->base, pipe_config);
305}
306
307static int intel_dp_mst_get_ddc_modes(struct drm_connector *connector)
308{
309 struct intel_connector *intel_connector = to_intel_connector(connector);
310 struct intel_dp *intel_dp = intel_connector->mst_port;
311 struct edid *edid;
312 int ret;
313
314 if (!intel_dp) {
315 return intel_connector_update_modes(connector, NULL);
316 }
317
318 edid = drm_dp_mst_get_edid(connector, &intel_dp->mst_mgr, intel_connector->port);
319 ret = intel_connector_update_modes(connector, edid);
320 kfree(edid);
321
322 return ret;
323}
324
325static enum drm_connector_status
326intel_dp_mst_detect(struct drm_connector *connector, bool force)
327{
328 struct intel_connector *intel_connector = to_intel_connector(connector);
329 struct intel_dp *intel_dp = intel_connector->mst_port;
330
331 if (!intel_dp)
332 return connector_status_disconnected;
333 return drm_dp_mst_detect_port(connector, &intel_dp->mst_mgr, intel_connector->port);
334}
335
336static void
337intel_dp_mst_connector_destroy(struct drm_connector *connector)
338{
339 struct intel_connector *intel_connector = to_intel_connector(connector);
340
341 if (!IS_ERR_OR_NULL(intel_connector->edid))
342 kfree(intel_connector->edid);
343
344 drm_connector_cleanup(connector);
345 kfree(connector);
346}
347
348static const struct drm_connector_funcs intel_dp_mst_connector_funcs = {
349 .detect = intel_dp_mst_detect,
350 .fill_modes = drm_helper_probe_single_connector_modes,
351 .late_register = intel_connector_register,
352 .early_unregister = intel_connector_unregister,
353 .destroy = intel_dp_mst_connector_destroy,
354 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
355 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
356};
357
358static int intel_dp_mst_get_modes(struct drm_connector *connector)
359{
360 return intel_dp_mst_get_ddc_modes(connector);
361}
362
363static enum drm_mode_status
364intel_dp_mst_mode_valid(struct drm_connector *connector,
365 struct drm_display_mode *mode)
366{
367 struct intel_connector *intel_connector = to_intel_connector(connector);
368 struct intel_dp *intel_dp = intel_connector->mst_port;
369 int max_dotclk = to_i915(connector->dev)->max_dotclk_freq;
370 int bpp = 24;
371 int max_rate, mode_rate, max_lanes, max_link_clock;
372
373 if (!intel_dp)
374 return MODE_ERROR;
375
376 max_link_clock = intel_dp_max_link_rate(intel_dp);
377 max_lanes = intel_dp_max_lane_count(intel_dp);
378
379 max_rate = intel_dp_max_data_rate(max_link_clock, max_lanes);
380 mode_rate = intel_dp_link_required(mode->clock, bpp);
381
382
383 if (mode->clock < 10000)
384 return MODE_CLOCK_LOW;
385
386 if (mode->flags & DRM_MODE_FLAG_DBLCLK)
387 return MODE_H_ILLEGAL;
388
389 if (mode_rate > max_rate || mode->clock > max_dotclk)
390 return MODE_CLOCK_HIGH;
391
392 return MODE_OK;
393}
394
395static struct drm_encoder *intel_mst_atomic_best_encoder(struct drm_connector *connector,
396 struct drm_connector_state *state)
397{
398 struct intel_connector *intel_connector = to_intel_connector(connector);
399 struct intel_dp *intel_dp = intel_connector->mst_port;
400 struct intel_crtc *crtc = to_intel_crtc(state->crtc);
401
402 if (!intel_dp)
403 return NULL;
404 return &intel_dp->mst_encoders[crtc->pipe]->base.base;
405}
406
407static struct drm_encoder *intel_mst_best_encoder(struct drm_connector *connector)
408{
409 struct intel_connector *intel_connector = to_intel_connector(connector);
410 struct intel_dp *intel_dp = intel_connector->mst_port;
411 if (!intel_dp)
412 return NULL;
413 return &intel_dp->mst_encoders[0]->base.base;
414}
415
416static const struct drm_connector_helper_funcs intel_dp_mst_connector_helper_funcs = {
417 .get_modes = intel_dp_mst_get_modes,
418 .mode_valid = intel_dp_mst_mode_valid,
419 .atomic_best_encoder = intel_mst_atomic_best_encoder,
420 .best_encoder = intel_mst_best_encoder,
421 .atomic_check = intel_dp_mst_atomic_check,
422};
423
424static void intel_dp_mst_encoder_destroy(struct drm_encoder *encoder)
425{
426 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
427
428 drm_encoder_cleanup(encoder);
429 kfree(intel_mst);
430}
431
432static const struct drm_encoder_funcs intel_dp_mst_enc_funcs = {
433 .destroy = intel_dp_mst_encoder_destroy,
434};
435
436static bool intel_dp_mst_get_hw_state(struct intel_connector *connector)
437{
438 if (connector->encoder && connector->base.state->crtc) {
439 enum pipe pipe;
440 if (!connector->encoder->get_hw_state(connector->encoder, &pipe))
441 return false;
442 return true;
443 }
444 return false;
445}
446
447static struct drm_connector *intel_dp_add_mst_connector(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port, const char *pathprop)
448{
449 struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr);
450 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
451 struct drm_device *dev = intel_dig_port->base.base.dev;
452 struct intel_connector *intel_connector;
453 struct drm_connector *connector;
454 int i;
455
456 intel_connector = intel_connector_alloc();
457 if (!intel_connector)
458 return NULL;
459
460 connector = &intel_connector->base;
461 drm_connector_init(dev, connector, &intel_dp_mst_connector_funcs, DRM_MODE_CONNECTOR_DisplayPort);
462 drm_connector_helper_add(connector, &intel_dp_mst_connector_helper_funcs);
463
464 intel_connector->get_hw_state = intel_dp_mst_get_hw_state;
465 intel_connector->mst_port = intel_dp;
466 intel_connector->port = port;
467
468 for (i = PIPE_A; i <= PIPE_C; i++) {
469 drm_mode_connector_attach_encoder(&intel_connector->base,
470 &intel_dp->mst_encoders[i]->base.base);
471 }
472
473 drm_object_attach_property(&connector->base, dev->mode_config.path_property, 0);
474 drm_object_attach_property(&connector->base, dev->mode_config.tile_property, 0);
475
476 drm_mode_connector_set_path_property(connector, pathprop);
477 return connector;
478}
479
480static void intel_dp_register_mst_connector(struct drm_connector *connector)
481{
482 struct drm_i915_private *dev_priv = to_i915(connector->dev);
483
484 if (dev_priv->fbdev)
485 drm_fb_helper_add_one_connector(&dev_priv->fbdev->helper,
486 connector);
487
488 drm_connector_register(connector);
489}
490
491static void intel_dp_destroy_mst_connector(struct drm_dp_mst_topology_mgr *mgr,
492 struct drm_connector *connector)
493{
494 struct intel_connector *intel_connector = to_intel_connector(connector);
495 struct drm_i915_private *dev_priv = to_i915(connector->dev);
496
497 drm_connector_unregister(connector);
498
499 if (dev_priv->fbdev)
500 drm_fb_helper_remove_one_connector(&dev_priv->fbdev->helper,
501 connector);
502
503 drm_modeset_lock(&connector->dev->mode_config.connection_mutex, NULL);
504 intel_connector->mst_port = NULL;
505 drm_modeset_unlock(&connector->dev->mode_config.connection_mutex);
506
507 drm_connector_unreference(connector);
508 DRM_DEBUG_KMS("\n");
509}
510
511static void intel_dp_mst_hotplug(struct drm_dp_mst_topology_mgr *mgr)
512{
513 struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr);
514 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
515 struct drm_device *dev = intel_dig_port->base.base.dev;
516
517 drm_kms_helper_hotplug_event(dev);
518}
519
520static const struct drm_dp_mst_topology_cbs mst_cbs = {
521 .add_connector = intel_dp_add_mst_connector,
522 .register_connector = intel_dp_register_mst_connector,
523 .destroy_connector = intel_dp_destroy_mst_connector,
524 .hotplug = intel_dp_mst_hotplug,
525};
526
527static struct intel_dp_mst_encoder *
528intel_dp_create_fake_mst_encoder(struct intel_digital_port *intel_dig_port, enum pipe pipe)
529{
530 struct intel_dp_mst_encoder *intel_mst;
531 struct intel_encoder *intel_encoder;
532 struct drm_device *dev = intel_dig_port->base.base.dev;
533
534 intel_mst = kzalloc(sizeof(*intel_mst), GFP_KERNEL);
535
536 if (!intel_mst)
537 return NULL;
538
539 intel_mst->pipe = pipe;
540 intel_encoder = &intel_mst->base;
541 intel_mst->primary = intel_dig_port;
542
543 drm_encoder_init(dev, &intel_encoder->base, &intel_dp_mst_enc_funcs,
544 DRM_MODE_ENCODER_DPMST, "DP-MST %c", pipe_name(pipe));
545
546 intel_encoder->type = INTEL_OUTPUT_DP_MST;
547 intel_encoder->power_domain = intel_dig_port->base.power_domain;
548 intel_encoder->port = intel_dig_port->port;
549 intel_encoder->crtc_mask = 0x7;
550 intel_encoder->cloneable = 0;
551
552 intel_encoder->compute_config = intel_dp_mst_compute_config;
553 intel_encoder->disable = intel_mst_disable_dp;
554 intel_encoder->post_disable = intel_mst_post_disable_dp;
555 intel_encoder->pre_enable = intel_mst_pre_enable_dp;
556 intel_encoder->enable = intel_mst_enable_dp;
557 intel_encoder->get_hw_state = intel_dp_mst_enc_get_hw_state;
558 intel_encoder->get_config = intel_dp_mst_enc_get_config;
559
560 return intel_mst;
561
562}
563
564static bool
565intel_dp_create_fake_mst_encoders(struct intel_digital_port *intel_dig_port)
566{
567 int i;
568 struct intel_dp *intel_dp = &intel_dig_port->dp;
569
570 for (i = PIPE_A; i <= PIPE_C; i++)
571 intel_dp->mst_encoders[i] = intel_dp_create_fake_mst_encoder(intel_dig_port, i);
572 return true;
573}
574
575int
576intel_dp_mst_encoder_init(struct intel_digital_port *intel_dig_port, int conn_base_id)
577{
578 struct intel_dp *intel_dp = &intel_dig_port->dp;
579 struct drm_device *dev = intel_dig_port->base.base.dev;
580 int ret;
581
582 intel_dp->can_mst = true;
583 intel_dp->mst_mgr.cbs = &mst_cbs;
584
585
586 intel_dp_create_fake_mst_encoders(intel_dig_port);
587 ret = drm_dp_mst_topology_mgr_init(&intel_dp->mst_mgr, dev,
588 &intel_dp->aux, 16, 3, conn_base_id);
589 if (ret) {
590 intel_dp->can_mst = false;
591 return ret;
592 }
593 return 0;
594}
595
596void
597intel_dp_mst_encoder_cleanup(struct intel_digital_port *intel_dig_port)
598{
599 struct intel_dp *intel_dp = &intel_dig_port->dp;
600
601 if (!intel_dp->can_mst)
602 return;
603
604 drm_dp_mst_topology_mgr_destroy(&intel_dp->mst_mgr);
605
606}
607
