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1// SPDX-License-Identifier: MIT
2
3#include <drm/drm_debugfs.h>
4#include <drm/drm_dp_mst_helper.h>
5#include <drm/drm_fb_helper.h>
6#include <drm/drm_file.h>
7#include <drm/drm_probe_helper.h>
8
9#include "atom.h"
10#include "ni_reg.h"
11#include "radeon.h"
12
13static struct radeon_encoder *radeon_dp_create_fake_mst_encoder(struct radeon_connector *connector);
14
15static int radeon_atom_set_enc_offset(int id)
16{
17 static const int offsets[] = { EVERGREEN_CRTC0_REGISTER_OFFSET,
18 EVERGREEN_CRTC1_REGISTER_OFFSET,
19 EVERGREEN_CRTC2_REGISTER_OFFSET,
20 EVERGREEN_CRTC3_REGISTER_OFFSET,
21 EVERGREEN_CRTC4_REGISTER_OFFSET,
22 EVERGREEN_CRTC5_REGISTER_OFFSET,
23 0x13830 - 0x7030 };
24
25 return offsets[id];
26}
27
28static int radeon_dp_mst_set_be_cntl(struct radeon_encoder *primary,
29 struct radeon_encoder_mst *mst_enc,
30 enum radeon_hpd_id hpd, bool enable)
31{
32 struct drm_device *dev = primary->base.dev;
33 struct radeon_device *rdev = dev->dev_private;
34 uint32_t reg;
35 int retries = 0;
36 uint32_t temp;
37
38 reg = RREG32(NI_DIG_BE_CNTL + primary->offset);
39
40 /* set MST mode */
41 reg &= ~NI_DIG_FE_DIG_MODE(7);
42 reg |= NI_DIG_FE_DIG_MODE(NI_DIG_MODE_DP_MST);
43
44 if (enable)
45 reg |= NI_DIG_FE_SOURCE_SELECT(1 << mst_enc->fe);
46 else
47 reg &= ~NI_DIG_FE_SOURCE_SELECT(1 << mst_enc->fe);
48
49 reg |= NI_DIG_HPD_SELECT(hpd);
50 DRM_DEBUG_KMS("writing 0x%08x 0x%08x\n", NI_DIG_BE_CNTL + primary->offset, reg);
51 WREG32(NI_DIG_BE_CNTL + primary->offset, reg);
52
53 if (enable) {
54 uint32_t offset = radeon_atom_set_enc_offset(mst_enc->fe);
55
56 do {
57 temp = RREG32(NI_DIG_FE_CNTL + offset);
58 } while ((temp & NI_DIG_SYMCLK_FE_ON) && retries++ < 10000);
59 if (retries == 10000)
60 DRM_ERROR("timed out waiting for FE %d %d\n", primary->offset, mst_enc->fe);
61 }
62 return 0;
63}
64
65static int radeon_dp_mst_set_stream_attrib(struct radeon_encoder *primary,
66 int stream_number,
67 int fe,
68 int slots)
69{
70 struct drm_device *dev = primary->base.dev;
71 struct radeon_device *rdev = dev->dev_private;
72 u32 temp, val;
73 int retries = 0;
74 int satreg, satidx;
75
76 satreg = stream_number >> 1;
77 satidx = stream_number & 1;
78
79 temp = RREG32(NI_DP_MSE_SAT0 + satreg + primary->offset);
80
81 val = NI_DP_MSE_SAT_SLOT_COUNT0(slots) | NI_DP_MSE_SAT_SRC0(fe);
82
83 val <<= (16 * satidx);
84
85 temp &= ~(0xffff << (16 * satidx));
86
87 temp |= val;
88
89 DRM_DEBUG_KMS("writing 0x%08x 0x%08x\n", NI_DP_MSE_SAT0 + satreg + primary->offset, temp);
90 WREG32(NI_DP_MSE_SAT0 + satreg + primary->offset, temp);
91
92 WREG32(NI_DP_MSE_SAT_UPDATE + primary->offset, 1);
93
94 do {
95 unsigned value1, value2;
96 udelay(10);
97 temp = RREG32(NI_DP_MSE_SAT_UPDATE + primary->offset);
98
99 value1 = temp & NI_DP_MSE_SAT_UPDATE_MASK;
100 value2 = temp & NI_DP_MSE_16_MTP_KEEPOUT;
101
102 if (!value1 && !value2)
103 break;
104 } while (retries++ < 50);
105
106 if (retries == 10000)
107 DRM_ERROR("timed out waitin for SAT update %d\n", primary->offset);
108
109 /* MTP 16 ? */
110 return 0;
111}
112
113static int radeon_dp_mst_update_stream_attribs(struct radeon_connector *mst_conn,
114 struct radeon_encoder *primary)
115{
116 struct drm_device *dev = mst_conn->base.dev;
117 struct stream_attribs new_attribs[6];
118 int i;
119 int idx = 0;
120 struct radeon_connector *radeon_connector;
121 struct drm_connector *connector;
122
123 memset(new_attribs, 0, sizeof(new_attribs));
124 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
125 struct radeon_encoder *subenc;
126 struct radeon_encoder_mst *mst_enc;
127
128 radeon_connector = to_radeon_connector(connector);
129 if (!radeon_connector->is_mst_connector)
130 continue;
131
132 if (radeon_connector->mst_port != mst_conn)
133 continue;
134
135 subenc = radeon_connector->mst_encoder;
136 mst_enc = subenc->enc_priv;
137
138 if (!mst_enc->enc_active)
139 continue;
140
141 new_attribs[idx].fe = mst_enc->fe;
142 new_attribs[idx].slots = drm_dp_mst_get_vcpi_slots(&mst_conn->mst_mgr, mst_enc->port);
143 idx++;
144 }
145
146 for (i = 0; i < idx; i++) {
147 if (new_attribs[i].fe != mst_conn->cur_stream_attribs[i].fe ||
148 new_attribs[i].slots != mst_conn->cur_stream_attribs[i].slots) {
149 radeon_dp_mst_set_stream_attrib(primary, i, new_attribs[i].fe, new_attribs[i].slots);
150 mst_conn->cur_stream_attribs[i].fe = new_attribs[i].fe;
151 mst_conn->cur_stream_attribs[i].slots = new_attribs[i].slots;
152 }
153 }
154
155 for (i = idx; i < mst_conn->enabled_attribs; i++) {
156 radeon_dp_mst_set_stream_attrib(primary, i, 0, 0);
157 mst_conn->cur_stream_attribs[i].fe = 0;
158 mst_conn->cur_stream_attribs[i].slots = 0;
159 }
160 mst_conn->enabled_attribs = idx;
161 return 0;
162}
163
164static int radeon_dp_mst_set_vcp_size(struct radeon_encoder *mst, s64 avg_time_slots_per_mtp)
165{
166 struct drm_device *dev = mst->base.dev;
167 struct radeon_device *rdev = dev->dev_private;
168 struct radeon_encoder_mst *mst_enc = mst->enc_priv;
169 uint32_t val, temp;
170 uint32_t offset = radeon_atom_set_enc_offset(mst_enc->fe);
171 int retries = 0;
172 uint32_t x = drm_fixp2int(avg_time_slots_per_mtp);
173 uint32_t y = drm_fixp2int_ceil((avg_time_slots_per_mtp - x) << 26);
174
175 val = NI_DP_MSE_RATE_X(x) | NI_DP_MSE_RATE_Y(y);
176
177 WREG32(NI_DP_MSE_RATE_CNTL + offset, val);
178
179 do {
180 temp = RREG32(NI_DP_MSE_RATE_UPDATE + offset);
181 udelay(10);
182 } while ((temp & 0x1) && (retries++ < 10000));
183
184 if (retries >= 10000)
185 DRM_ERROR("timed out wait for rate cntl %d\n", mst_enc->fe);
186 return 0;
187}
188
189static int radeon_dp_mst_get_ddc_modes(struct drm_connector *connector)
190{
191 struct radeon_connector *radeon_connector = to_radeon_connector(connector);
192 struct radeon_connector *master = radeon_connector->mst_port;
193 struct edid *edid;
194 int ret = 0;
195
196 edid = drm_dp_mst_get_edid(connector, &master->mst_mgr, radeon_connector->port);
197 radeon_connector->edid = edid;
198 DRM_DEBUG_KMS("edid retrieved %p\n", edid);
199 if (radeon_connector->edid) {
200 drm_connector_update_edid_property(&radeon_connector->base, radeon_connector->edid);
201 ret = drm_add_edid_modes(&radeon_connector->base, radeon_connector->edid);
202 return ret;
203 }
204 drm_connector_update_edid_property(&radeon_connector->base, NULL);
205
206 return ret;
207}
208
209static int radeon_dp_mst_get_modes(struct drm_connector *connector)
210{
211 return radeon_dp_mst_get_ddc_modes(connector);
212}
213
214static enum drm_mode_status
215radeon_dp_mst_mode_valid(struct drm_connector *connector,
216 struct drm_display_mode *mode)
217{
218 /* TODO - validate mode against available PBN for link */
219 if (mode->clock < 10000)
220 return MODE_CLOCK_LOW;
221
222 if (mode->flags & DRM_MODE_FLAG_DBLCLK)
223 return MODE_H_ILLEGAL;
224
225 return MODE_OK;
226}
227
228static struct
229drm_encoder *radeon_mst_best_encoder(struct drm_connector *connector)
230{
231 struct radeon_connector *radeon_connector = to_radeon_connector(connector);
232
233 return &radeon_connector->mst_encoder->base;
234}
235
236static const struct drm_connector_helper_funcs radeon_dp_mst_connector_helper_funcs = {
237 .get_modes = radeon_dp_mst_get_modes,
238 .mode_valid = radeon_dp_mst_mode_valid,
239 .best_encoder = radeon_mst_best_encoder,
240};
241
242static enum drm_connector_status
243radeon_dp_mst_detect(struct drm_connector *connector, bool force)
244{
245 struct radeon_connector *radeon_connector = to_radeon_connector(connector);
246 struct radeon_connector *master = radeon_connector->mst_port;
247
248 return drm_dp_mst_detect_port(connector, &master->mst_mgr, radeon_connector->port);
249}
250
251static void
252radeon_dp_mst_connector_destroy(struct drm_connector *connector)
253{
254 struct radeon_connector *radeon_connector = to_radeon_connector(connector);
255 struct radeon_encoder *radeon_encoder = radeon_connector->mst_encoder;
256
257 drm_encoder_cleanup(&radeon_encoder->base);
258 kfree(radeon_encoder);
259 drm_connector_cleanup(connector);
260 kfree(radeon_connector);
261}
262
263static const struct drm_connector_funcs radeon_dp_mst_connector_funcs = {
264 .dpms = drm_helper_connector_dpms,
265 .detect = radeon_dp_mst_detect,
266 .fill_modes = drm_helper_probe_single_connector_modes,
267 .destroy = radeon_dp_mst_connector_destroy,
268};
269
270static struct drm_connector *radeon_dp_add_mst_connector(struct drm_dp_mst_topology_mgr *mgr,
271 struct drm_dp_mst_port *port,
272 const char *pathprop)
273{
274 struct radeon_connector *master = container_of(mgr, struct radeon_connector, mst_mgr);
275 struct drm_device *dev = master->base.dev;
276 struct radeon_connector *radeon_connector;
277 struct drm_connector *connector;
278
279 radeon_connector = kzalloc(sizeof(*radeon_connector), GFP_KERNEL);
280 if (!radeon_connector)
281 return NULL;
282
283 radeon_connector->is_mst_connector = true;
284 connector = &radeon_connector->base;
285 radeon_connector->port = port;
286 radeon_connector->mst_port = master;
287 DRM_DEBUG_KMS("\n");
288
289 drm_connector_init(dev, connector, &radeon_dp_mst_connector_funcs, DRM_MODE_CONNECTOR_DisplayPort);
290 drm_connector_helper_add(connector, &radeon_dp_mst_connector_helper_funcs);
291 radeon_connector->mst_encoder = radeon_dp_create_fake_mst_encoder(master);
292
293 drm_object_attach_property(&connector->base, dev->mode_config.path_property, 0);
294 drm_object_attach_property(&connector->base, dev->mode_config.tile_property, 0);
295 drm_connector_set_path_property(connector, pathprop);
296
297 return connector;
298}
299
300static void radeon_dp_register_mst_connector(struct drm_connector *connector)
301{
302 struct drm_device *dev = connector->dev;
303 struct radeon_device *rdev = dev->dev_private;
304
305 radeon_fb_add_connector(rdev, connector);
306
307 drm_connector_register(connector);
308}
309
310static void radeon_dp_destroy_mst_connector(struct drm_dp_mst_topology_mgr *mgr,
311 struct drm_connector *connector)
312{
313 struct radeon_connector *master = container_of(mgr, struct radeon_connector, mst_mgr);
314 struct drm_device *dev = master->base.dev;
315 struct radeon_device *rdev = dev->dev_private;
316
317 drm_connector_unregister(connector);
318 radeon_fb_remove_connector(rdev, connector);
319 drm_connector_cleanup(connector);
320
321 kfree(connector);
322 DRM_DEBUG_KMS("\n");
323}
324
325static const struct drm_dp_mst_topology_cbs mst_cbs = {
326 .add_connector = radeon_dp_add_mst_connector,
327 .register_connector = radeon_dp_register_mst_connector,
328 .destroy_connector = radeon_dp_destroy_mst_connector,
329};
330
331static struct
332radeon_connector *radeon_mst_find_connector(struct drm_encoder *encoder)
333{
334 struct drm_device *dev = encoder->dev;
335 struct drm_connector *connector;
336
337 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
338 struct radeon_connector *radeon_connector = to_radeon_connector(connector);
339 if (!connector->encoder)
340 continue;
341 if (!radeon_connector->is_mst_connector)
342 continue;
343
344 DRM_DEBUG_KMS("checking %p vs %p\n", connector->encoder, encoder);
345 if (connector->encoder == encoder)
346 return radeon_connector;
347 }
348 return NULL;
349}
350
351void radeon_dp_mst_prepare_pll(struct drm_crtc *crtc, struct drm_display_mode *mode)
352{
353 struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
354 struct drm_device *dev = crtc->dev;
355 struct radeon_device *rdev = dev->dev_private;
356 struct radeon_encoder *radeon_encoder = to_radeon_encoder(radeon_crtc->encoder);
357 struct radeon_encoder_mst *mst_enc = radeon_encoder->enc_priv;
358 struct radeon_connector *radeon_connector = radeon_mst_find_connector(&radeon_encoder->base);
359 int dp_clock;
360 struct radeon_connector_atom_dig *dig_connector = mst_enc->connector->con_priv;
361
362 if (radeon_connector) {
363 radeon_connector->pixelclock_for_modeset = mode->clock;
364 if (radeon_connector->base.display_info.bpc)
365 radeon_crtc->bpc = radeon_connector->base.display_info.bpc;
366 else
367 radeon_crtc->bpc = 8;
368 }
369
370 DRM_DEBUG_KMS("dp_clock %p %d\n", dig_connector, dig_connector->dp_clock);
371 dp_clock = dig_connector->dp_clock;
372 radeon_crtc->ss_enabled =
373 radeon_atombios_get_asic_ss_info(rdev, &radeon_crtc->ss,
374 ASIC_INTERNAL_SS_ON_DP,
375 dp_clock);
376}
377
378static void
379radeon_mst_encoder_dpms(struct drm_encoder *encoder, int mode)
380{
381 struct drm_device *dev = encoder->dev;
382 struct radeon_device *rdev = dev->dev_private;
383 struct radeon_encoder *radeon_encoder, *primary;
384 struct radeon_encoder_mst *mst_enc;
385 struct radeon_encoder_atom_dig *dig_enc;
386 struct radeon_connector *radeon_connector;
387 struct drm_crtc *crtc;
388 struct radeon_crtc *radeon_crtc;
389 int ret, slots;
390 s64 fixed_pbn, fixed_pbn_per_slot, avg_time_slots_per_mtp;
391 if (!ASIC_IS_DCE5(rdev)) {
392 DRM_ERROR("got mst dpms on non-DCE5\n");
393 return;
394 }
395
396 radeon_connector = radeon_mst_find_connector(encoder);
397 if (!radeon_connector)
398 return;
399
400 radeon_encoder = to_radeon_encoder(encoder);
401
402 mst_enc = radeon_encoder->enc_priv;
403
404 primary = mst_enc->primary;
405
406 dig_enc = primary->enc_priv;
407
408 crtc = encoder->crtc;
409 DRM_DEBUG_KMS("got connector %d\n", dig_enc->active_mst_links);
410
411 switch (mode) {
412 case DRM_MODE_DPMS_ON:
413 dig_enc->active_mst_links++;
414
415 radeon_crtc = to_radeon_crtc(crtc);
416
417 if (dig_enc->active_mst_links == 1) {
418 mst_enc->fe = dig_enc->dig_encoder;
419 mst_enc->fe_from_be = true;
420 atombios_set_mst_encoder_crtc_source(encoder, mst_enc->fe);
421
422 atombios_dig_encoder_setup(&primary->base, ATOM_ENCODER_CMD_SETUP, 0);
423 atombios_dig_transmitter_setup2(&primary->base, ATOM_TRANSMITTER_ACTION_ENABLE,
424 0, 0, dig_enc->dig_encoder);
425
426 if (radeon_dp_needs_link_train(mst_enc->connector) ||
427 dig_enc->active_mst_links == 1) {
428 radeon_dp_link_train(&primary->base, &mst_enc->connector->base);
429 }
430
431 } else {
432 mst_enc->fe = radeon_atom_pick_dig_encoder(encoder, radeon_crtc->crtc_id);
433 if (mst_enc->fe == -1)
434 DRM_ERROR("failed to get frontend for dig encoder\n");
435 mst_enc->fe_from_be = false;
436 atombios_set_mst_encoder_crtc_source(encoder, mst_enc->fe);
437 }
438
439 DRM_DEBUG_KMS("dig encoder is %d %d %d\n", dig_enc->dig_encoder,
440 dig_enc->linkb, radeon_crtc->crtc_id);
441
442 slots = drm_dp_find_vcpi_slots(&radeon_connector->mst_port->mst_mgr,
443 mst_enc->pbn);
444 ret = drm_dp_mst_allocate_vcpi(&radeon_connector->mst_port->mst_mgr,
445 radeon_connector->port,
446 mst_enc->pbn, slots);
447 ret = drm_dp_update_payload_part1(&radeon_connector->mst_port->mst_mgr);
448
449 radeon_dp_mst_set_be_cntl(primary, mst_enc,
450 radeon_connector->mst_port->hpd.hpd, true);
451
452 mst_enc->enc_active = true;
453 radeon_dp_mst_update_stream_attribs(radeon_connector->mst_port, primary);
454
455 fixed_pbn = drm_int2fixp(mst_enc->pbn);
456 fixed_pbn_per_slot = drm_int2fixp(radeon_connector->mst_port->mst_mgr.pbn_div);
457 avg_time_slots_per_mtp = drm_fixp_div(fixed_pbn, fixed_pbn_per_slot);
458 radeon_dp_mst_set_vcp_size(radeon_encoder, avg_time_slots_per_mtp);
459
460 atombios_dig_encoder_setup2(&primary->base, ATOM_ENCODER_CMD_DP_VIDEO_ON, 0,
461 mst_enc->fe);
462 ret = drm_dp_check_act_status(&radeon_connector->mst_port->mst_mgr);
463
464 ret = drm_dp_update_payload_part2(&radeon_connector->mst_port->mst_mgr);
465
466 break;
467 case DRM_MODE_DPMS_STANDBY:
468 case DRM_MODE_DPMS_SUSPEND:
469 case DRM_MODE_DPMS_OFF:
470 DRM_ERROR("DPMS OFF %d\n", dig_enc->active_mst_links);
471
472 if (!mst_enc->enc_active)
473 return;
474
475 drm_dp_mst_reset_vcpi_slots(&radeon_connector->mst_port->mst_mgr, mst_enc->port);
476 ret = drm_dp_update_payload_part1(&radeon_connector->mst_port->mst_mgr);
477
478 drm_dp_check_act_status(&radeon_connector->mst_port->mst_mgr);
479 /* and this can also fail */
480 drm_dp_update_payload_part2(&radeon_connector->mst_port->mst_mgr);
481
482 drm_dp_mst_deallocate_vcpi(&radeon_connector->mst_port->mst_mgr, mst_enc->port);
483
484 mst_enc->enc_active = false;
485 radeon_dp_mst_update_stream_attribs(radeon_connector->mst_port, primary);
486
487 radeon_dp_mst_set_be_cntl(primary, mst_enc,
488 radeon_connector->mst_port->hpd.hpd, false);
489 atombios_dig_encoder_setup2(&primary->base, ATOM_ENCODER_CMD_DP_VIDEO_OFF, 0,
490 mst_enc->fe);
491
492 if (!mst_enc->fe_from_be)
493 radeon_atom_release_dig_encoder(rdev, mst_enc->fe);
494
495 mst_enc->fe_from_be = false;
496 dig_enc->active_mst_links--;
497 if (dig_enc->active_mst_links == 0) {
498 /* drop link */
499 }
500
501 break;
502 }
503
504}
505
506static bool radeon_mst_mode_fixup(struct drm_encoder *encoder,
507 const struct drm_display_mode *mode,
508 struct drm_display_mode *adjusted_mode)
509{
510 struct radeon_encoder_mst *mst_enc;
511 struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
512 struct radeon_connector_atom_dig *dig_connector;
513 int bpp = 24;
514
515 mst_enc = radeon_encoder->enc_priv;
516
517 mst_enc->pbn = drm_dp_calc_pbn_mode(adjusted_mode->clock, bpp);
518
519 mst_enc->primary->active_device = mst_enc->primary->devices & mst_enc->connector->devices;
520 DRM_DEBUG_KMS("setting active device to %08x from %08x %08x for encoder %d\n",
521 mst_enc->primary->active_device, mst_enc->primary->devices,
522 mst_enc->connector->devices, mst_enc->primary->base.encoder_type);
523
524
525 drm_mode_set_crtcinfo(adjusted_mode, 0);
526 dig_connector = mst_enc->connector->con_priv;
527 dig_connector->dp_lane_count = drm_dp_max_lane_count(dig_connector->dpcd);
528 dig_connector->dp_clock = drm_dp_max_link_rate(dig_connector->dpcd);
529 DRM_DEBUG_KMS("dig clock %p %d %d\n", dig_connector,
530 dig_connector->dp_lane_count, dig_connector->dp_clock);
531 return true;
532}
533
534static void radeon_mst_encoder_prepare(struct drm_encoder *encoder)
535{
536 struct radeon_connector *radeon_connector;
537 struct radeon_encoder *radeon_encoder, *primary;
538 struct radeon_encoder_mst *mst_enc;
539 struct radeon_encoder_atom_dig *dig_enc;
540
541 radeon_connector = radeon_mst_find_connector(encoder);
542 if (!radeon_connector) {
543 DRM_DEBUG_KMS("failed to find connector %p\n", encoder);
544 return;
545 }
546 radeon_encoder = to_radeon_encoder(encoder);
547
548 radeon_mst_encoder_dpms(encoder, DRM_MODE_DPMS_OFF);
549
550 mst_enc = radeon_encoder->enc_priv;
551
552 primary = mst_enc->primary;
553
554 dig_enc = primary->enc_priv;
555
556 mst_enc->port = radeon_connector->port;
557
558 if (dig_enc->dig_encoder == -1) {
559 dig_enc->dig_encoder = radeon_atom_pick_dig_encoder(&primary->base, -1);
560 primary->offset = radeon_atom_set_enc_offset(dig_enc->dig_encoder);
561 atombios_set_mst_encoder_crtc_source(encoder, dig_enc->dig_encoder);
562
563
564 }
565 DRM_DEBUG_KMS("%d %d\n", dig_enc->dig_encoder, primary->offset);
566}
567
568static void
569radeon_mst_encoder_mode_set(struct drm_encoder *encoder,
570 struct drm_display_mode *mode,
571 struct drm_display_mode *adjusted_mode)
572{
573 DRM_DEBUG_KMS("\n");
574}
575
576static void radeon_mst_encoder_commit(struct drm_encoder *encoder)
577{
578 radeon_mst_encoder_dpms(encoder, DRM_MODE_DPMS_ON);
579 DRM_DEBUG_KMS("\n");
580}
581
582static const struct drm_encoder_helper_funcs radeon_mst_helper_funcs = {
583 .dpms = radeon_mst_encoder_dpms,
584 .mode_fixup = radeon_mst_mode_fixup,
585 .prepare = radeon_mst_encoder_prepare,
586 .mode_set = radeon_mst_encoder_mode_set,
587 .commit = radeon_mst_encoder_commit,
588};
589
590static void radeon_dp_mst_encoder_destroy(struct drm_encoder *encoder)
591{
592 drm_encoder_cleanup(encoder);
593 kfree(encoder);
594}
595
596static const struct drm_encoder_funcs radeon_dp_mst_enc_funcs = {
597 .destroy = radeon_dp_mst_encoder_destroy,
598};
599
600static struct radeon_encoder *
601radeon_dp_create_fake_mst_encoder(struct radeon_connector *connector)
602{
603 struct drm_device *dev = connector->base.dev;
604 struct radeon_device *rdev = dev->dev_private;
605 struct radeon_encoder *radeon_encoder;
606 struct radeon_encoder_mst *mst_enc;
607 struct drm_encoder *encoder;
608 const struct drm_connector_helper_funcs *connector_funcs = connector->base.helper_private;
609 struct drm_encoder *enc_master = connector_funcs->best_encoder(&connector->base);
610
611 DRM_DEBUG_KMS("enc master is %p\n", enc_master);
612 radeon_encoder = kzalloc(sizeof(*radeon_encoder), GFP_KERNEL);
613 if (!radeon_encoder)
614 return NULL;
615
616 radeon_encoder->enc_priv = kzalloc(sizeof(*mst_enc), GFP_KERNEL);
617 if (!radeon_encoder->enc_priv) {
618 kfree(radeon_encoder);
619 return NULL;
620 }
621 encoder = &radeon_encoder->base;
622 switch (rdev->num_crtc) {
623 case 1:
624 encoder->possible_crtcs = 0x1;
625 break;
626 case 2:
627 default:
628 encoder->possible_crtcs = 0x3;
629 break;
630 case 4:
631 encoder->possible_crtcs = 0xf;
632 break;
633 case 6:
634 encoder->possible_crtcs = 0x3f;
635 break;
636 }
637
638 drm_encoder_init(dev, &radeon_encoder->base, &radeon_dp_mst_enc_funcs,
639 DRM_MODE_ENCODER_DPMST, NULL);
640 drm_encoder_helper_add(encoder, &radeon_mst_helper_funcs);
641
642 mst_enc = radeon_encoder->enc_priv;
643 mst_enc->connector = connector;
644 mst_enc->primary = to_radeon_encoder(enc_master);
645 radeon_encoder->is_mst_encoder = true;
646 return radeon_encoder;
647}
648
649int
650radeon_dp_mst_init(struct radeon_connector *radeon_connector)
651{
652 struct drm_device *dev = radeon_connector->base.dev;
653
654 if (!radeon_connector->ddc_bus->has_aux)
655 return 0;
656
657 radeon_connector->mst_mgr.cbs = &mst_cbs;
658 return drm_dp_mst_topology_mgr_init(&radeon_connector->mst_mgr, dev,
659 &radeon_connector->ddc_bus->aux, 16, 6,
660 radeon_connector->base.base.id);
661}
662
663int
664radeon_dp_mst_probe(struct radeon_connector *radeon_connector)
665{
666 struct radeon_connector_atom_dig *dig_connector = radeon_connector->con_priv;
667 struct drm_device *dev = radeon_connector->base.dev;
668 struct radeon_device *rdev = dev->dev_private;
669 int ret;
670 u8 msg[1];
671
672 if (!radeon_mst)
673 return 0;
674
675 if (!ASIC_IS_DCE5(rdev))
676 return 0;
677
678 if (dig_connector->dpcd[DP_DPCD_REV] < 0x12)
679 return 0;
680
681 ret = drm_dp_dpcd_read(&radeon_connector->ddc_bus->aux, DP_MSTM_CAP, msg,
682 1);
683 if (ret) {
684 if (msg[0] & DP_MST_CAP) {
685 DRM_DEBUG_KMS("Sink is MST capable\n");
686 dig_connector->is_mst = true;
687 } else {
688 DRM_DEBUG_KMS("Sink is not MST capable\n");
689 dig_connector->is_mst = false;
690 }
691
692 }
693 drm_dp_mst_topology_mgr_set_mst(&radeon_connector->mst_mgr,
694 dig_connector->is_mst);
695 return dig_connector->is_mst;
696}
697
698int
699radeon_dp_mst_check_status(struct radeon_connector *radeon_connector)
700{
701 struct radeon_connector_atom_dig *dig_connector = radeon_connector->con_priv;
702 int retry;
703
704 if (dig_connector->is_mst) {
705 u8 esi[16] = { 0 };
706 int dret;
707 int ret = 0;
708 bool handled;
709
710 dret = drm_dp_dpcd_read(&radeon_connector->ddc_bus->aux,
711 DP_SINK_COUNT_ESI, esi, 8);
712go_again:
713 if (dret == 8) {
714 DRM_DEBUG_KMS("got esi %3ph\n", esi);
715 ret = drm_dp_mst_hpd_irq(&radeon_connector->mst_mgr, esi, &handled);
716
717 if (handled) {
718 for (retry = 0; retry < 3; retry++) {
719 int wret;
720 wret = drm_dp_dpcd_write(&radeon_connector->ddc_bus->aux,
721 DP_SINK_COUNT_ESI + 1, &esi[1], 3);
722 if (wret == 3)
723 break;
724 }
725
726 dret = drm_dp_dpcd_read(&radeon_connector->ddc_bus->aux,
727 DP_SINK_COUNT_ESI, esi, 8);
728 if (dret == 8) {
729 DRM_DEBUG_KMS("got esi2 %3ph\n", esi);
730 goto go_again;
731 }
732 } else
733 ret = 0;
734
735 return ret;
736 } else {
737 DRM_DEBUG_KMS("failed to get ESI - device may have failed %d\n", ret);
738 dig_connector->is_mst = false;
739 drm_dp_mst_topology_mgr_set_mst(&radeon_connector->mst_mgr,
740 dig_connector->is_mst);
741 /* send a hotplug event */
742 }
743 }
744 return -EINVAL;
745}
746
747#if defined(CONFIG_DEBUG_FS)
748
749static int radeon_debugfs_mst_info(struct seq_file *m, void *data)
750{
751 struct drm_info_node *node = (struct drm_info_node *)m->private;
752 struct drm_device *dev = node->minor->dev;
753 struct drm_connector *connector;
754 struct radeon_connector *radeon_connector;
755 struct radeon_connector_atom_dig *dig_connector;
756 int i;
757
758 drm_modeset_lock_all(dev);
759 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
760 if (connector->connector_type != DRM_MODE_CONNECTOR_DisplayPort)
761 continue;
762
763 radeon_connector = to_radeon_connector(connector);
764 dig_connector = radeon_connector->con_priv;
765 if (radeon_connector->is_mst_connector)
766 continue;
767 if (!dig_connector->is_mst)
768 continue;
769 drm_dp_mst_dump_topology(m, &radeon_connector->mst_mgr);
770
771 for (i = 0; i < radeon_connector->enabled_attribs; i++)
772 seq_printf(m, "attrib %d: %d %d\n", i,
773 radeon_connector->cur_stream_attribs[i].fe,
774 radeon_connector->cur_stream_attribs[i].slots);
775 }
776 drm_modeset_unlock_all(dev);
777 return 0;
778}
779
780static struct drm_info_list radeon_debugfs_mst_list[] = {
781 {"radeon_mst_info", &radeon_debugfs_mst_info, 0, NULL},
782};
783#endif
784
785int radeon_mst_debugfs_init(struct radeon_device *rdev)
786{
787#if defined(CONFIG_DEBUG_FS)
788 return radeon_debugfs_add_files(rdev, radeon_debugfs_mst_list, 1);
789#endif
790 return 0;
791}