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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
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 drm_atomic_state *state;
41 int bpp;
42 int lane_count, slots;
43 const struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode;
44 int mst_pbn;
45
46 pipe_config->has_pch_encoder = false;
47 bpp = 24;
48 /*
49 * for MST we always configure max link bw - the spec doesn't
50 * seem to suggest we should do otherwise.
51 */
52 lane_count = drm_dp_max_lane_count(intel_dp->dpcd);
53
54 pipe_config->lane_count = lane_count;
55
56 pipe_config->pipe_bpp = 24;
57 pipe_config->port_clock = intel_dp_max_link_rate(intel_dp);
58
59 state = pipe_config->base.state;
60
61 mst_pbn = drm_dp_calc_pbn_mode(adjusted_mode->crtc_clock, bpp);
62
63 pipe_config->pbn = mst_pbn;
64 slots = drm_dp_find_vcpi_slots(&intel_dp->mst_mgr, mst_pbn);
65
66 intel_link_compute_m_n(bpp, lane_count,
67 adjusted_mode->crtc_clock,
68 pipe_config->port_clock,
69 &pipe_config->dp_m_n);
70
71 pipe_config->dp_m_n.tu = slots;
72
73 return true;
74
75}
76
77static void intel_mst_disable_dp(struct intel_encoder *encoder,
78 struct intel_crtc_state *old_crtc_state,
79 struct drm_connector_state *old_conn_state)
80{
81 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
82 struct intel_digital_port *intel_dig_port = intel_mst->primary;
83 struct intel_dp *intel_dp = &intel_dig_port->dp;
84 struct intel_connector *connector =
85 to_intel_connector(old_conn_state->connector);
86 int ret;
87
88 DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
89
90 drm_dp_mst_reset_vcpi_slots(&intel_dp->mst_mgr, connector->port);
91
92 ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
93 if (ret) {
94 DRM_ERROR("failed to update payload %d\n", ret);
95 }
96}
97
98static void intel_mst_post_disable_dp(struct intel_encoder *encoder,
99 struct intel_crtc_state *old_crtc_state,
100 struct drm_connector_state *old_conn_state)
101{
102 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
103 struct intel_digital_port *intel_dig_port = intel_mst->primary;
104 struct intel_dp *intel_dp = &intel_dig_port->dp;
105 struct intel_connector *connector =
106 to_intel_connector(old_conn_state->connector);
107
108 DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
109
110 /* this can fail */
111 drm_dp_check_act_status(&intel_dp->mst_mgr);
112 /* and this can also fail */
113 drm_dp_update_payload_part2(&intel_dp->mst_mgr);
114
115 drm_dp_mst_deallocate_vcpi(&intel_dp->mst_mgr, connector->port);
116
117 intel_dp->active_mst_links--;
118
119 intel_mst->connector = NULL;
120 if (intel_dp->active_mst_links == 0) {
121 intel_dig_port->base.post_disable(&intel_dig_port->base,
122 NULL, NULL);
123
124 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_OFF);
125 }
126}
127
128static void intel_mst_pre_enable_dp(struct intel_encoder *encoder,
129 struct intel_crtc_state *pipe_config,
130 struct drm_connector_state *conn_state)
131{
132 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
133 struct intel_digital_port *intel_dig_port = intel_mst->primary;
134 struct intel_dp *intel_dp = &intel_dig_port->dp;
135 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
136 enum port port = intel_dig_port->port;
137 struct intel_connector *connector =
138 to_intel_connector(conn_state->connector);
139 int ret;
140 uint32_t temp;
141 int slots;
142
143 /* MST encoders are bound to a crtc, not to a connector,
144 * force the mapping here for get_hw_state.
145 */
146 connector->encoder = encoder;
147 intel_mst->connector = connector;
148
149 DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
150
151 if (intel_dp->active_mst_links == 0) {
152 intel_ddi_clk_select(&intel_dig_port->base,
153 pipe_config->shared_dpll);
154
155 intel_prepare_dp_ddi_buffers(&intel_dig_port->base);
156 intel_dp_set_link_params(intel_dp,
157 pipe_config->port_clock,
158 pipe_config->lane_count,
159 true);
160
161 intel_ddi_init_dp_buf_reg(&intel_dig_port->base);
162
163 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON);
164
165 intel_dp_start_link_train(intel_dp);
166 intel_dp_stop_link_train(intel_dp);
167 }
168
169 ret = drm_dp_mst_allocate_vcpi(&intel_dp->mst_mgr,
170 connector->port,
171 pipe_config->pbn, &slots);
172 if (ret == false) {
173 DRM_ERROR("failed to allocate vcpi\n");
174 return;
175 }
176
177
178 intel_dp->active_mst_links++;
179 temp = I915_READ(DP_TP_STATUS(port));
180 I915_WRITE(DP_TP_STATUS(port), temp);
181
182 ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
183}
184
185static void intel_mst_enable_dp(struct intel_encoder *encoder,
186 struct intel_crtc_state *pipe_config,
187 struct drm_connector_state *conn_state)
188{
189 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
190 struct intel_digital_port *intel_dig_port = intel_mst->primary;
191 struct intel_dp *intel_dp = &intel_dig_port->dp;
192 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
193 enum port port = intel_dig_port->port;
194 int ret;
195
196 DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
197
198 if (intel_wait_for_register(dev_priv,
199 DP_TP_STATUS(port),
200 DP_TP_STATUS_ACT_SENT,
201 DP_TP_STATUS_ACT_SENT,
202 1))
203 DRM_ERROR("Timed out waiting for ACT sent\n");
204
205 ret = drm_dp_check_act_status(&intel_dp->mst_mgr);
206
207 ret = drm_dp_update_payload_part2(&intel_dp->mst_mgr);
208}
209
210static bool intel_dp_mst_enc_get_hw_state(struct intel_encoder *encoder,
211 enum pipe *pipe)
212{
213 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
214 *pipe = intel_mst->pipe;
215 if (intel_mst->connector)
216 return true;
217 return false;
218}
219
220static void intel_dp_mst_enc_get_config(struct intel_encoder *encoder,
221 struct intel_crtc_state *pipe_config)
222{
223 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
224 struct intel_digital_port *intel_dig_port = intel_mst->primary;
225 struct intel_crtc *crtc = to_intel_crtc(pipe_config->base.crtc);
226 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
227 enum transcoder cpu_transcoder = pipe_config->cpu_transcoder;
228 u32 temp, flags = 0;
229
230 temp = I915_READ(TRANS_DDI_FUNC_CTL(cpu_transcoder));
231 if (temp & TRANS_DDI_PHSYNC)
232 flags |= DRM_MODE_FLAG_PHSYNC;
233 else
234 flags |= DRM_MODE_FLAG_NHSYNC;
235 if (temp & TRANS_DDI_PVSYNC)
236 flags |= DRM_MODE_FLAG_PVSYNC;
237 else
238 flags |= DRM_MODE_FLAG_NVSYNC;
239
240 switch (temp & TRANS_DDI_BPC_MASK) {
241 case TRANS_DDI_BPC_6:
242 pipe_config->pipe_bpp = 18;
243 break;
244 case TRANS_DDI_BPC_8:
245 pipe_config->pipe_bpp = 24;
246 break;
247 case TRANS_DDI_BPC_10:
248 pipe_config->pipe_bpp = 30;
249 break;
250 case TRANS_DDI_BPC_12:
251 pipe_config->pipe_bpp = 36;
252 break;
253 default:
254 break;
255 }
256 pipe_config->base.adjusted_mode.flags |= flags;
257
258 pipe_config->lane_count =
259 ((temp & DDI_PORT_WIDTH_MASK) >> DDI_PORT_WIDTH_SHIFT) + 1;
260
261 intel_dp_get_m_n(crtc, pipe_config);
262
263 intel_ddi_clock_get(&intel_dig_port->base, pipe_config);
264}
265
266static int intel_dp_mst_get_ddc_modes(struct drm_connector *connector)
267{
268 struct intel_connector *intel_connector = to_intel_connector(connector);
269 struct intel_dp *intel_dp = intel_connector->mst_port;
270 struct edid *edid;
271 int ret;
272
273 if (!intel_dp) {
274 return intel_connector_update_modes(connector, NULL);
275 }
276
277 edid = drm_dp_mst_get_edid(connector, &intel_dp->mst_mgr, intel_connector->port);
278 ret = intel_connector_update_modes(connector, edid);
279 kfree(edid);
280
281 return ret;
282}
283
284static enum drm_connector_status
285intel_dp_mst_detect(struct drm_connector *connector, bool force)
286{
287 struct intel_connector *intel_connector = to_intel_connector(connector);
288 struct intel_dp *intel_dp = intel_connector->mst_port;
289
290 if (!intel_dp)
291 return connector_status_disconnected;
292 return drm_dp_mst_detect_port(connector, &intel_dp->mst_mgr, intel_connector->port);
293}
294
295static int
296intel_dp_mst_set_property(struct drm_connector *connector,
297 struct drm_property *property,
298 uint64_t val)
299{
300 return 0;
301}
302
303static void
304intel_dp_mst_connector_destroy(struct drm_connector *connector)
305{
306 struct intel_connector *intel_connector = to_intel_connector(connector);
307
308 if (!IS_ERR_OR_NULL(intel_connector->edid))
309 kfree(intel_connector->edid);
310
311 drm_connector_cleanup(connector);
312 kfree(connector);
313}
314
315static const struct drm_connector_funcs intel_dp_mst_connector_funcs = {
316 .dpms = drm_atomic_helper_connector_dpms,
317 .detect = intel_dp_mst_detect,
318 .fill_modes = drm_helper_probe_single_connector_modes,
319 .set_property = intel_dp_mst_set_property,
320 .atomic_get_property = intel_connector_atomic_get_property,
321 .late_register = intel_connector_register,
322 .early_unregister = intel_connector_unregister,
323 .destroy = intel_dp_mst_connector_destroy,
324 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
325 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
326};
327
328static int intel_dp_mst_get_modes(struct drm_connector *connector)
329{
330 return intel_dp_mst_get_ddc_modes(connector);
331}
332
333static enum drm_mode_status
334intel_dp_mst_mode_valid(struct drm_connector *connector,
335 struct drm_display_mode *mode)
336{
337 int max_dotclk = to_i915(connector->dev)->max_dotclk_freq;
338
339 /* TODO - validate mode against available PBN for link */
340 if (mode->clock < 10000)
341 return MODE_CLOCK_LOW;
342
343 if (mode->flags & DRM_MODE_FLAG_DBLCLK)
344 return MODE_H_ILLEGAL;
345
346 if (mode->clock > max_dotclk)
347 return MODE_CLOCK_HIGH;
348
349 return MODE_OK;
350}
351
352static struct drm_encoder *intel_mst_atomic_best_encoder(struct drm_connector *connector,
353 struct drm_connector_state *state)
354{
355 struct intel_connector *intel_connector = to_intel_connector(connector);
356 struct intel_dp *intel_dp = intel_connector->mst_port;
357 struct intel_crtc *crtc = to_intel_crtc(state->crtc);
358
359 if (!intel_dp)
360 return NULL;
361 return &intel_dp->mst_encoders[crtc->pipe]->base.base;
362}
363
364static struct drm_encoder *intel_mst_best_encoder(struct drm_connector *connector)
365{
366 struct intel_connector *intel_connector = to_intel_connector(connector);
367 struct intel_dp *intel_dp = intel_connector->mst_port;
368 if (!intel_dp)
369 return NULL;
370 return &intel_dp->mst_encoders[0]->base.base;
371}
372
373static const struct drm_connector_helper_funcs intel_dp_mst_connector_helper_funcs = {
374 .get_modes = intel_dp_mst_get_modes,
375 .mode_valid = intel_dp_mst_mode_valid,
376 .atomic_best_encoder = intel_mst_atomic_best_encoder,
377 .best_encoder = intel_mst_best_encoder,
378};
379
380static void intel_dp_mst_encoder_destroy(struct drm_encoder *encoder)
381{
382 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
383
384 drm_encoder_cleanup(encoder);
385 kfree(intel_mst);
386}
387
388static const struct drm_encoder_funcs intel_dp_mst_enc_funcs = {
389 .destroy = intel_dp_mst_encoder_destroy,
390};
391
392static bool intel_dp_mst_get_hw_state(struct intel_connector *connector)
393{
394 if (connector->encoder && connector->base.state->crtc) {
395 enum pipe pipe;
396 if (!connector->encoder->get_hw_state(connector->encoder, &pipe))
397 return false;
398 return true;
399 }
400 return false;
401}
402
403static void intel_connector_add_to_fbdev(struct intel_connector *connector)
404{
405#ifdef CONFIG_DRM_FBDEV_EMULATION
406 struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
407
408 if (dev_priv->fbdev)
409 drm_fb_helper_add_one_connector(&dev_priv->fbdev->helper,
410 &connector->base);
411#endif
412}
413
414static void intel_connector_remove_from_fbdev(struct intel_connector *connector)
415{
416#ifdef CONFIG_DRM_FBDEV_EMULATION
417 struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
418
419 if (dev_priv->fbdev)
420 drm_fb_helper_remove_one_connector(&dev_priv->fbdev->helper,
421 &connector->base);
422#endif
423}
424
425static struct drm_connector *intel_dp_add_mst_connector(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port, const char *pathprop)
426{
427 struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr);
428 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
429 struct drm_device *dev = intel_dig_port->base.base.dev;
430 struct intel_connector *intel_connector;
431 struct drm_connector *connector;
432 int i;
433
434 intel_connector = intel_connector_alloc();
435 if (!intel_connector)
436 return NULL;
437
438 connector = &intel_connector->base;
439 drm_connector_init(dev, connector, &intel_dp_mst_connector_funcs, DRM_MODE_CONNECTOR_DisplayPort);
440 drm_connector_helper_add(connector, &intel_dp_mst_connector_helper_funcs);
441
442 intel_connector->get_hw_state = intel_dp_mst_get_hw_state;
443 intel_connector->mst_port = intel_dp;
444 intel_connector->port = port;
445
446 for (i = PIPE_A; i <= PIPE_C; i++) {
447 drm_mode_connector_attach_encoder(&intel_connector->base,
448 &intel_dp->mst_encoders[i]->base.base);
449 }
450 intel_dp_add_properties(intel_dp, connector);
451
452 drm_object_attach_property(&connector->base, dev->mode_config.path_property, 0);
453 drm_object_attach_property(&connector->base, dev->mode_config.tile_property, 0);
454
455 drm_mode_connector_set_path_property(connector, pathprop);
456 return connector;
457}
458
459static void intel_dp_register_mst_connector(struct drm_connector *connector)
460{
461 struct intel_connector *intel_connector = to_intel_connector(connector);
462 struct drm_device *dev = connector->dev;
463
464 drm_modeset_lock_all(dev);
465 intel_connector_add_to_fbdev(intel_connector);
466 drm_modeset_unlock_all(dev);
467
468 drm_connector_register(&intel_connector->base);
469}
470
471static void intel_dp_destroy_mst_connector(struct drm_dp_mst_topology_mgr *mgr,
472 struct drm_connector *connector)
473{
474 struct intel_connector *intel_connector = to_intel_connector(connector);
475 struct drm_device *dev = connector->dev;
476
477 drm_connector_unregister(connector);
478
479 /* need to nuke the connector */
480 drm_modeset_lock_all(dev);
481 intel_connector_remove_from_fbdev(intel_connector);
482 intel_connector->mst_port = NULL;
483 drm_modeset_unlock_all(dev);
484
485 drm_connector_unreference(&intel_connector->base);
486 DRM_DEBUG_KMS("\n");
487}
488
489static void intel_dp_mst_hotplug(struct drm_dp_mst_topology_mgr *mgr)
490{
491 struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr);
492 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
493 struct drm_device *dev = intel_dig_port->base.base.dev;
494
495 drm_kms_helper_hotplug_event(dev);
496}
497
498static const struct drm_dp_mst_topology_cbs mst_cbs = {
499 .add_connector = intel_dp_add_mst_connector,
500 .register_connector = intel_dp_register_mst_connector,
501 .destroy_connector = intel_dp_destroy_mst_connector,
502 .hotplug = intel_dp_mst_hotplug,
503};
504
505static struct intel_dp_mst_encoder *
506intel_dp_create_fake_mst_encoder(struct intel_digital_port *intel_dig_port, enum pipe pipe)
507{
508 struct intel_dp_mst_encoder *intel_mst;
509 struct intel_encoder *intel_encoder;
510 struct drm_device *dev = intel_dig_port->base.base.dev;
511
512 intel_mst = kzalloc(sizeof(*intel_mst), GFP_KERNEL);
513
514 if (!intel_mst)
515 return NULL;
516
517 intel_mst->pipe = pipe;
518 intel_encoder = &intel_mst->base;
519 intel_mst->primary = intel_dig_port;
520
521 drm_encoder_init(dev, &intel_encoder->base, &intel_dp_mst_enc_funcs,
522 DRM_MODE_ENCODER_DPMST, "DP-MST %c", pipe_name(pipe));
523
524 intel_encoder->type = INTEL_OUTPUT_DP_MST;
525 intel_encoder->port = intel_dig_port->port;
526 intel_encoder->crtc_mask = 0x7;
527 intel_encoder->cloneable = 0;
528
529 intel_encoder->compute_config = intel_dp_mst_compute_config;
530 intel_encoder->disable = intel_mst_disable_dp;
531 intel_encoder->post_disable = intel_mst_post_disable_dp;
532 intel_encoder->pre_enable = intel_mst_pre_enable_dp;
533 intel_encoder->enable = intel_mst_enable_dp;
534 intel_encoder->get_hw_state = intel_dp_mst_enc_get_hw_state;
535 intel_encoder->get_config = intel_dp_mst_enc_get_config;
536
537 return intel_mst;
538
539}
540
541static bool
542intel_dp_create_fake_mst_encoders(struct intel_digital_port *intel_dig_port)
543{
544 int i;
545 struct intel_dp *intel_dp = &intel_dig_port->dp;
546
547 for (i = PIPE_A; i <= PIPE_C; i++)
548 intel_dp->mst_encoders[i] = intel_dp_create_fake_mst_encoder(intel_dig_port, i);
549 return true;
550}
551
552int
553intel_dp_mst_encoder_init(struct intel_digital_port *intel_dig_port, int conn_base_id)
554{
555 struct intel_dp *intel_dp = &intel_dig_port->dp;
556 struct drm_device *dev = intel_dig_port->base.base.dev;
557 int ret;
558
559 intel_dp->can_mst = true;
560 intel_dp->mst_mgr.cbs = &mst_cbs;
561
562 /* create encoders */
563 intel_dp_create_fake_mst_encoders(intel_dig_port);
564 ret = drm_dp_mst_topology_mgr_init(&intel_dp->mst_mgr, dev->dev, &intel_dp->aux, 16, 3, conn_base_id);
565 if (ret) {
566 intel_dp->can_mst = false;
567 return ret;
568 }
569 return 0;
570}
571
572void
573intel_dp_mst_encoder_cleanup(struct intel_digital_port *intel_dig_port)
574{
575 struct intel_dp *intel_dp = &intel_dig_port->dp;
576
577 if (!intel_dp->can_mst)
578 return;
579
580 drm_dp_mst_topology_mgr_destroy(&intel_dp->mst_mgr);
581 /* encoders will get killed by normal cleanup */
582}
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
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 drm_i915_private *dev_priv = to_i915(encoder->base.dev);
38 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
39 struct intel_digital_port *intel_dig_port = intel_mst->primary;
40 struct intel_dp *intel_dp = &intel_dig_port->dp;
41 struct intel_connector *connector =
42 to_intel_connector(conn_state->connector);
43 struct drm_atomic_state *state = pipe_config->base.state;
44 int bpp;
45 int lane_count, slots;
46 const struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode;
47 int mst_pbn;
48 bool reduce_m_n = drm_dp_has_quirk(&intel_dp->desc,
49 DP_DPCD_QUIRK_LIMITED_M_N);
50
51 pipe_config->has_pch_encoder = false;
52 bpp = 24;
53 if (intel_dp->compliance.test_data.bpc) {
54 bpp = intel_dp->compliance.test_data.bpc * 3;
55 DRM_DEBUG_KMS("Setting pipe bpp to %d\n",
56 bpp);
57 }
58 /*
59 * for MST we always configure max link bw - the spec doesn't
60 * seem to suggest we should do otherwise.
61 */
62 lane_count = intel_dp_max_lane_count(intel_dp);
63
64 pipe_config->lane_count = lane_count;
65
66 pipe_config->pipe_bpp = bpp;
67
68 pipe_config->port_clock = intel_dp_max_link_rate(intel_dp);
69
70 if (drm_dp_mst_port_has_audio(&intel_dp->mst_mgr, connector->port))
71 pipe_config->has_audio = true;
72
73 mst_pbn = drm_dp_calc_pbn_mode(adjusted_mode->crtc_clock, bpp);
74 pipe_config->pbn = mst_pbn;
75
76 slots = drm_dp_atomic_find_vcpi_slots(state, &intel_dp->mst_mgr,
77 connector->port, mst_pbn);
78 if (slots < 0) {
79 DRM_DEBUG_KMS("failed finding vcpi slots:%d\n", slots);
80 return false;
81 }
82
83 intel_link_compute_m_n(bpp, lane_count,
84 adjusted_mode->crtc_clock,
85 pipe_config->port_clock,
86 &pipe_config->dp_m_n,
87 reduce_m_n);
88
89 pipe_config->dp_m_n.tu = slots;
90
91 if (IS_GEN9_LP(dev_priv))
92 pipe_config->lane_lat_optim_mask =
93 bxt_ddi_phy_calc_lane_lat_optim_mask(pipe_config->lane_count);
94
95 intel_ddi_compute_min_voltage_level(dev_priv, pipe_config);
96
97 return true;
98}
99
100static int intel_dp_mst_atomic_check(struct drm_connector *connector,
101 struct drm_connector_state *new_conn_state)
102{
103 struct drm_atomic_state *state = new_conn_state->state;
104 struct drm_connector_state *old_conn_state;
105 struct drm_crtc *old_crtc;
106 struct drm_crtc_state *crtc_state;
107 int slots, ret = 0;
108
109 old_conn_state = drm_atomic_get_old_connector_state(state, connector);
110 old_crtc = old_conn_state->crtc;
111 if (!old_crtc)
112 return ret;
113
114 crtc_state = drm_atomic_get_new_crtc_state(state, old_crtc);
115 slots = to_intel_crtc_state(crtc_state)->dp_m_n.tu;
116 if (drm_atomic_crtc_needs_modeset(crtc_state) && slots > 0) {
117 struct drm_dp_mst_topology_mgr *mgr;
118 struct drm_encoder *old_encoder;
119
120 old_encoder = old_conn_state->best_encoder;
121 mgr = &enc_to_mst(old_encoder)->primary->dp.mst_mgr;
122
123 ret = drm_dp_atomic_release_vcpi_slots(state, mgr, slots);
124 if (ret)
125 DRM_DEBUG_KMS("failed releasing %d vcpi slots:%d\n", slots, ret);
126 else
127 to_intel_crtc_state(crtc_state)->dp_m_n.tu = 0;
128 }
129 return ret;
130}
131
132static void intel_mst_disable_dp(struct intel_encoder *encoder,
133 const struct intel_crtc_state *old_crtc_state,
134 const struct drm_connector_state *old_conn_state)
135{
136 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
137 struct intel_digital_port *intel_dig_port = intel_mst->primary;
138 struct intel_dp *intel_dp = &intel_dig_port->dp;
139 struct intel_connector *connector =
140 to_intel_connector(old_conn_state->connector);
141 int ret;
142
143 DRM_DEBUG_KMS("active links %d\n", intel_dp->active_mst_links);
144
145 drm_dp_mst_reset_vcpi_slots(&intel_dp->mst_mgr, connector->port);
146
147 ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
148 if (ret) {
149 DRM_ERROR("failed to update payload %d\n", ret);
150 }
151 if (old_crtc_state->has_audio)
152 intel_audio_codec_disable(encoder,
153 old_crtc_state, old_conn_state);
154}
155
156static void intel_mst_post_disable_dp(struct intel_encoder *encoder,
157 const struct intel_crtc_state *old_crtc_state,
158 const struct drm_connector_state *old_conn_state)
159{
160 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
161 struct intel_digital_port *intel_dig_port = intel_mst->primary;
162 struct intel_dp *intel_dp = &intel_dig_port->dp;
163 struct intel_connector *connector =
164 to_intel_connector(old_conn_state->connector);
165
166 /* this can fail */
167 drm_dp_check_act_status(&intel_dp->mst_mgr);
168 /* and this can also fail */
169 drm_dp_update_payload_part2(&intel_dp->mst_mgr);
170
171 drm_dp_mst_deallocate_vcpi(&intel_dp->mst_mgr, connector->port);
172
173 /*
174 * Power down mst path before disabling the port, otherwise we end
175 * up getting interrupts from the sink upon detecting link loss.
176 */
177 drm_dp_send_power_updown_phy(&intel_dp->mst_mgr, connector->port,
178 false);
179
180 intel_dp->active_mst_links--;
181
182 intel_mst->connector = NULL;
183 if (intel_dp->active_mst_links == 0)
184 intel_dig_port->base.post_disable(&intel_dig_port->base,
185 old_crtc_state, NULL);
186
187 DRM_DEBUG_KMS("active links %d\n", intel_dp->active_mst_links);
188}
189
190static void intel_mst_pre_pll_enable_dp(struct intel_encoder *encoder,
191 const struct intel_crtc_state *pipe_config,
192 const struct drm_connector_state *conn_state)
193{
194 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
195 struct intel_digital_port *intel_dig_port = intel_mst->primary;
196 struct intel_dp *intel_dp = &intel_dig_port->dp;
197
198 if (intel_dp->active_mst_links == 0 &&
199 intel_dig_port->base.pre_pll_enable)
200 intel_dig_port->base.pre_pll_enable(&intel_dig_port->base,
201 pipe_config, NULL);
202}
203
204static void intel_mst_pre_enable_dp(struct intel_encoder *encoder,
205 const struct intel_crtc_state *pipe_config,
206 const struct drm_connector_state *conn_state)
207{
208 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
209 struct intel_digital_port *intel_dig_port = intel_mst->primary;
210 struct intel_dp *intel_dp = &intel_dig_port->dp;
211 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
212 enum port port = intel_dig_port->base.port;
213 struct intel_connector *connector =
214 to_intel_connector(conn_state->connector);
215 int ret;
216 uint32_t temp;
217
218 /* MST encoders are bound to a crtc, not to a connector,
219 * force the mapping here for get_hw_state.
220 */
221 connector->encoder = encoder;
222 intel_mst->connector = connector;
223
224 DRM_DEBUG_KMS("active links %d\n", intel_dp->active_mst_links);
225
226 drm_dp_send_power_updown_phy(&intel_dp->mst_mgr, connector->port, true);
227 if (intel_dp->active_mst_links == 0)
228 intel_dig_port->base.pre_enable(&intel_dig_port->base,
229 pipe_config, NULL);
230
231 ret = drm_dp_mst_allocate_vcpi(&intel_dp->mst_mgr,
232 connector->port,
233 pipe_config->pbn,
234 pipe_config->dp_m_n.tu);
235 if (ret == false) {
236 DRM_ERROR("failed to allocate vcpi\n");
237 return;
238 }
239
240
241 intel_dp->active_mst_links++;
242 temp = I915_READ(DP_TP_STATUS(port));
243 I915_WRITE(DP_TP_STATUS(port), temp);
244
245 ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
246}
247
248static void intel_mst_enable_dp(struct intel_encoder *encoder,
249 const struct intel_crtc_state *pipe_config,
250 const struct drm_connector_state *conn_state)
251{
252 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
253 struct intel_digital_port *intel_dig_port = intel_mst->primary;
254 struct intel_dp *intel_dp = &intel_dig_port->dp;
255 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
256 enum port port = intel_dig_port->base.port;
257 int ret;
258
259 DRM_DEBUG_KMS("active links %d\n", intel_dp->active_mst_links);
260
261 if (intel_wait_for_register(dev_priv,
262 DP_TP_STATUS(port),
263 DP_TP_STATUS_ACT_SENT,
264 DP_TP_STATUS_ACT_SENT,
265 1))
266 DRM_ERROR("Timed out waiting for ACT sent\n");
267
268 ret = drm_dp_check_act_status(&intel_dp->mst_mgr);
269
270 ret = drm_dp_update_payload_part2(&intel_dp->mst_mgr);
271 if (pipe_config->has_audio)
272 intel_audio_codec_enable(encoder, pipe_config, conn_state);
273}
274
275static bool intel_dp_mst_enc_get_hw_state(struct intel_encoder *encoder,
276 enum pipe *pipe)
277{
278 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
279 *pipe = intel_mst->pipe;
280 if (intel_mst->connector)
281 return true;
282 return false;
283}
284
285static void intel_dp_mst_enc_get_config(struct intel_encoder *encoder,
286 struct intel_crtc_state *pipe_config)
287{
288 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
289 struct intel_digital_port *intel_dig_port = intel_mst->primary;
290
291 intel_ddi_get_config(&intel_dig_port->base, pipe_config);
292}
293
294static int intel_dp_mst_get_ddc_modes(struct drm_connector *connector)
295{
296 struct intel_connector *intel_connector = to_intel_connector(connector);
297 struct intel_dp *intel_dp = intel_connector->mst_port;
298 struct edid *edid;
299 int ret;
300
301 if (!intel_dp) {
302 return intel_connector_update_modes(connector, NULL);
303 }
304
305 edid = drm_dp_mst_get_edid(connector, &intel_dp->mst_mgr, intel_connector->port);
306 ret = intel_connector_update_modes(connector, edid);
307 kfree(edid);
308
309 return ret;
310}
311
312static enum drm_connector_status
313intel_dp_mst_detect(struct drm_connector *connector, bool force)
314{
315 struct intel_connector *intel_connector = to_intel_connector(connector);
316 struct intel_dp *intel_dp = intel_connector->mst_port;
317
318 if (!intel_dp)
319 return connector_status_disconnected;
320 return drm_dp_mst_detect_port(connector, &intel_dp->mst_mgr, intel_connector->port);
321}
322
323static void
324intel_dp_mst_connector_destroy(struct drm_connector *connector)
325{
326 struct intel_connector *intel_connector = to_intel_connector(connector);
327
328 if (!IS_ERR_OR_NULL(intel_connector->edid))
329 kfree(intel_connector->edid);
330
331 drm_connector_cleanup(connector);
332 kfree(connector);
333}
334
335static const struct drm_connector_funcs intel_dp_mst_connector_funcs = {
336 .detect = intel_dp_mst_detect,
337 .fill_modes = drm_helper_probe_single_connector_modes,
338 .late_register = intel_connector_register,
339 .early_unregister = intel_connector_unregister,
340 .destroy = intel_dp_mst_connector_destroy,
341 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
342 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
343};
344
345static int intel_dp_mst_get_modes(struct drm_connector *connector)
346{
347 return intel_dp_mst_get_ddc_modes(connector);
348}
349
350static enum drm_mode_status
351intel_dp_mst_mode_valid(struct drm_connector *connector,
352 struct drm_display_mode *mode)
353{
354 struct intel_connector *intel_connector = to_intel_connector(connector);
355 struct intel_dp *intel_dp = intel_connector->mst_port;
356 int max_dotclk = to_i915(connector->dev)->max_dotclk_freq;
357 int bpp = 24; /* MST uses fixed bpp */
358 int max_rate, mode_rate, max_lanes, max_link_clock;
359
360 if (!intel_dp)
361 return MODE_ERROR;
362
363 max_link_clock = intel_dp_max_link_rate(intel_dp);
364 max_lanes = intel_dp_max_lane_count(intel_dp);
365
366 max_rate = intel_dp_max_data_rate(max_link_clock, max_lanes);
367 mode_rate = intel_dp_link_required(mode->clock, bpp);
368
369 /* TODO - validate mode against available PBN for link */
370 if (mode->clock < 10000)
371 return MODE_CLOCK_LOW;
372
373 if (mode->flags & DRM_MODE_FLAG_DBLCLK)
374 return MODE_H_ILLEGAL;
375
376 if (mode_rate > max_rate || mode->clock > max_dotclk)
377 return MODE_CLOCK_HIGH;
378
379 return MODE_OK;
380}
381
382static struct drm_encoder *intel_mst_atomic_best_encoder(struct drm_connector *connector,
383 struct drm_connector_state *state)
384{
385 struct intel_connector *intel_connector = to_intel_connector(connector);
386 struct intel_dp *intel_dp = intel_connector->mst_port;
387 struct intel_crtc *crtc = to_intel_crtc(state->crtc);
388
389 if (!intel_dp)
390 return NULL;
391 return &intel_dp->mst_encoders[crtc->pipe]->base.base;
392}
393
394static struct drm_encoder *intel_mst_best_encoder(struct drm_connector *connector)
395{
396 struct intel_connector *intel_connector = to_intel_connector(connector);
397 struct intel_dp *intel_dp = intel_connector->mst_port;
398 if (!intel_dp)
399 return NULL;
400 return &intel_dp->mst_encoders[0]->base.base;
401}
402
403static const struct drm_connector_helper_funcs intel_dp_mst_connector_helper_funcs = {
404 .get_modes = intel_dp_mst_get_modes,
405 .mode_valid = intel_dp_mst_mode_valid,
406 .atomic_best_encoder = intel_mst_atomic_best_encoder,
407 .best_encoder = intel_mst_best_encoder,
408 .atomic_check = intel_dp_mst_atomic_check,
409};
410
411static void intel_dp_mst_encoder_destroy(struct drm_encoder *encoder)
412{
413 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
414
415 drm_encoder_cleanup(encoder);
416 kfree(intel_mst);
417}
418
419static const struct drm_encoder_funcs intel_dp_mst_enc_funcs = {
420 .destroy = intel_dp_mst_encoder_destroy,
421};
422
423static bool intel_dp_mst_get_hw_state(struct intel_connector *connector)
424{
425 if (connector->encoder && connector->base.state->crtc) {
426 enum pipe pipe;
427 if (!connector->encoder->get_hw_state(connector->encoder, &pipe))
428 return false;
429 return true;
430 }
431 return false;
432}
433
434static struct drm_connector *intel_dp_add_mst_connector(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port, const char *pathprop)
435{
436 struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr);
437 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
438 struct drm_device *dev = intel_dig_port->base.base.dev;
439 struct drm_i915_private *dev_priv = to_i915(dev);
440 struct intel_connector *intel_connector;
441 struct drm_connector *connector;
442 enum pipe pipe;
443 int ret;
444
445 intel_connector = intel_connector_alloc();
446 if (!intel_connector)
447 return NULL;
448
449 connector = &intel_connector->base;
450 ret = drm_connector_init(dev, connector, &intel_dp_mst_connector_funcs,
451 DRM_MODE_CONNECTOR_DisplayPort);
452 if (ret) {
453 intel_connector_free(intel_connector);
454 return NULL;
455 }
456
457 drm_connector_helper_add(connector, &intel_dp_mst_connector_helper_funcs);
458
459 intel_connector->get_hw_state = intel_dp_mst_get_hw_state;
460 intel_connector->mst_port = intel_dp;
461 intel_connector->port = port;
462
463 for_each_pipe(dev_priv, pipe) {
464 struct drm_encoder *enc =
465 &intel_dp->mst_encoders[pipe]->base.base;
466
467 ret = drm_mode_connector_attach_encoder(&intel_connector->base,
468 enc);
469 if (ret)
470 goto err;
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 ret = drm_mode_connector_set_path_property(connector, pathprop);
477 if (ret)
478 goto err;
479
480 return connector;
481
482err:
483 drm_connector_cleanup(connector);
484 return NULL;
485}
486
487static void intel_dp_register_mst_connector(struct drm_connector *connector)
488{
489 struct drm_i915_private *dev_priv = to_i915(connector->dev);
490
491 if (dev_priv->fbdev)
492 drm_fb_helper_add_one_connector(&dev_priv->fbdev->helper,
493 connector);
494
495 drm_connector_register(connector);
496}
497
498static void intel_dp_destroy_mst_connector(struct drm_dp_mst_topology_mgr *mgr,
499 struct drm_connector *connector)
500{
501 struct intel_connector *intel_connector = to_intel_connector(connector);
502 struct drm_i915_private *dev_priv = to_i915(connector->dev);
503
504 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", connector->base.id, connector->name);
505 drm_connector_unregister(connector);
506
507 if (dev_priv->fbdev)
508 drm_fb_helper_remove_one_connector(&dev_priv->fbdev->helper,
509 connector);
510 /* prevent race with the check in ->detect */
511 drm_modeset_lock(&connector->dev->mode_config.connection_mutex, NULL);
512 intel_connector->mst_port = NULL;
513 drm_modeset_unlock(&connector->dev->mode_config.connection_mutex);
514
515 drm_connector_unreference(connector);
516}
517
518static void intel_dp_mst_hotplug(struct drm_dp_mst_topology_mgr *mgr)
519{
520 struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr);
521 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
522 struct drm_device *dev = intel_dig_port->base.base.dev;
523
524 drm_kms_helper_hotplug_event(dev);
525}
526
527static const struct drm_dp_mst_topology_cbs mst_cbs = {
528 .add_connector = intel_dp_add_mst_connector,
529 .register_connector = intel_dp_register_mst_connector,
530 .destroy_connector = intel_dp_destroy_mst_connector,
531 .hotplug = intel_dp_mst_hotplug,
532};
533
534static struct intel_dp_mst_encoder *
535intel_dp_create_fake_mst_encoder(struct intel_digital_port *intel_dig_port, enum pipe pipe)
536{
537 struct intel_dp_mst_encoder *intel_mst;
538 struct intel_encoder *intel_encoder;
539 struct drm_device *dev = intel_dig_port->base.base.dev;
540
541 intel_mst = kzalloc(sizeof(*intel_mst), GFP_KERNEL);
542
543 if (!intel_mst)
544 return NULL;
545
546 intel_mst->pipe = pipe;
547 intel_encoder = &intel_mst->base;
548 intel_mst->primary = intel_dig_port;
549
550 drm_encoder_init(dev, &intel_encoder->base, &intel_dp_mst_enc_funcs,
551 DRM_MODE_ENCODER_DPMST, "DP-MST %c", pipe_name(pipe));
552
553 intel_encoder->type = INTEL_OUTPUT_DP_MST;
554 intel_encoder->power_domain = intel_dig_port->base.power_domain;
555 intel_encoder->port = intel_dig_port->base.port;
556 intel_encoder->crtc_mask = 0x7;
557 intel_encoder->cloneable = 0;
558
559 intel_encoder->compute_config = intel_dp_mst_compute_config;
560 intel_encoder->disable = intel_mst_disable_dp;
561 intel_encoder->post_disable = intel_mst_post_disable_dp;
562 intel_encoder->pre_pll_enable = intel_mst_pre_pll_enable_dp;
563 intel_encoder->pre_enable = intel_mst_pre_enable_dp;
564 intel_encoder->enable = intel_mst_enable_dp;
565 intel_encoder->get_hw_state = intel_dp_mst_enc_get_hw_state;
566 intel_encoder->get_config = intel_dp_mst_enc_get_config;
567
568 return intel_mst;
569
570}
571
572static bool
573intel_dp_create_fake_mst_encoders(struct intel_digital_port *intel_dig_port)
574{
575 struct intel_dp *intel_dp = &intel_dig_port->dp;
576 struct drm_i915_private *dev_priv = to_i915(intel_dig_port->base.base.dev);
577 enum pipe pipe;
578
579 for_each_pipe(dev_priv, pipe)
580 intel_dp->mst_encoders[pipe] = intel_dp_create_fake_mst_encoder(intel_dig_port, pipe);
581 return true;
582}
583
584int
585intel_dp_mst_encoder_init(struct intel_digital_port *intel_dig_port, int conn_base_id)
586{
587 struct intel_dp *intel_dp = &intel_dig_port->dp;
588 struct drm_device *dev = intel_dig_port->base.base.dev;
589 int ret;
590
591 intel_dp->can_mst = true;
592 intel_dp->mst_mgr.cbs = &mst_cbs;
593
594 /* create encoders */
595 intel_dp_create_fake_mst_encoders(intel_dig_port);
596 ret = drm_dp_mst_topology_mgr_init(&intel_dp->mst_mgr, dev,
597 &intel_dp->aux, 16, 3, conn_base_id);
598 if (ret) {
599 intel_dp->can_mst = false;
600 return ret;
601 }
602 return 0;
603}
604
605void
606intel_dp_mst_encoder_cleanup(struct intel_digital_port *intel_dig_port)
607{
608 struct intel_dp *intel_dp = &intel_dig_port->dp;
609
610 if (!intel_dp->can_mst)
611 return;
612
613 drm_dp_mst_topology_mgr_destroy(&intel_dp->mst_mgr);
614 /* encoders will get killed by normal cleanup */
615}