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1// SPDX-License-Identifier: MIT
2
3#include <drm/drm_dp_mst_helper.h>
4#include <drm/drm_fb_helper.h>
5#include <drm/drm_file.h>
6#include <drm/drm_probe_helper.h>
7
8#include "atom.h"
9#include "ni_reg.h"
10#include "radeon.h"
11
12static struct radeon_encoder *radeon_dp_create_fake_mst_encoder(struct radeon_connector *connector);
13
14static int radeon_atom_set_enc_offset(int id)
15{
16 static const int offsets[] = { EVERGREEN_CRTC0_REGISTER_OFFSET,
17 EVERGREEN_CRTC1_REGISTER_OFFSET,
18 EVERGREEN_CRTC2_REGISTER_OFFSET,
19 EVERGREEN_CRTC3_REGISTER_OFFSET,
20 EVERGREEN_CRTC4_REGISTER_OFFSET,
21 EVERGREEN_CRTC5_REGISTER_OFFSET,
22 0x13830 - 0x7030 };
23
24 return offsets[id];
25}
26
27static int radeon_dp_mst_set_be_cntl(struct radeon_encoder *primary,
28 struct radeon_encoder_mst *mst_enc,
29 enum radeon_hpd_id hpd, bool enable)
30{
31 struct drm_device *dev = primary->base.dev;
32 struct radeon_device *rdev = dev->dev_private;
33 uint32_t reg;
34 int retries = 0;
35 uint32_t temp;
36
37 reg = RREG32(NI_DIG_BE_CNTL + primary->offset);
38
39 /* set MST mode */
40 reg &= ~NI_DIG_FE_DIG_MODE(7);
41 reg |= NI_DIG_FE_DIG_MODE(NI_DIG_MODE_DP_MST);
42
43 if (enable)
44 reg |= NI_DIG_FE_SOURCE_SELECT(1 << mst_enc->fe);
45 else
46 reg &= ~NI_DIG_FE_SOURCE_SELECT(1 << mst_enc->fe);
47
48 reg |= NI_DIG_HPD_SELECT(hpd);
49 DRM_DEBUG_KMS("writing 0x%08x 0x%08x\n", NI_DIG_BE_CNTL + primary->offset, reg);
50 WREG32(NI_DIG_BE_CNTL + primary->offset, reg);
51
52 if (enable) {
53 uint32_t offset = radeon_atom_set_enc_offset(mst_enc->fe);
54
55 do {
56 temp = RREG32(NI_DIG_FE_CNTL + offset);
57 } while ((temp & NI_DIG_SYMCLK_FE_ON) && retries++ < 10000);
58 if (retries == 10000)
59 DRM_ERROR("timed out waiting for FE %d %d\n", primary->offset, mst_enc->fe);
60 }
61 return 0;
62}
63
64static int radeon_dp_mst_set_stream_attrib(struct radeon_encoder *primary,
65 int stream_number,
66 int fe,
67 int slots)
68{
69 struct drm_device *dev = primary->base.dev;
70 struct radeon_device *rdev = dev->dev_private;
71 u32 temp, val;
72 int retries = 0;
73 int satreg, satidx;
74
75 satreg = stream_number >> 1;
76 satidx = stream_number & 1;
77
78 temp = RREG32(NI_DP_MSE_SAT0 + satreg + primary->offset);
79
80 val = NI_DP_MSE_SAT_SLOT_COUNT0(slots) | NI_DP_MSE_SAT_SRC0(fe);
81
82 val <<= (16 * satidx);
83
84 temp &= ~(0xffff << (16 * satidx));
85
86 temp |= val;
87
88 DRM_DEBUG_KMS("writing 0x%08x 0x%08x\n", NI_DP_MSE_SAT0 + satreg + primary->offset, temp);
89 WREG32(NI_DP_MSE_SAT0 + satreg + primary->offset, temp);
90
91 WREG32(NI_DP_MSE_SAT_UPDATE + primary->offset, 1);
92
93 do {
94 unsigned value1, value2;
95 udelay(10);
96 temp = RREG32(NI_DP_MSE_SAT_UPDATE + primary->offset);
97
98 value1 = temp & NI_DP_MSE_SAT_UPDATE_MASK;
99 value2 = temp & NI_DP_MSE_16_MTP_KEEPOUT;
100
101 if (!value1 && !value2)
102 break;
103 } while (retries++ < 50);
104
105 if (retries == 10000)
106 DRM_ERROR("timed out waitin for SAT update %d\n", primary->offset);
107
108 /* MTP 16 ? */
109 return 0;
110}
111
112static int radeon_dp_mst_update_stream_attribs(struct radeon_connector *mst_conn,
113 struct radeon_encoder *primary)
114{
115 struct drm_device *dev = mst_conn->base.dev;
116 struct stream_attribs new_attribs[6];
117 int i;
118 int idx = 0;
119 struct radeon_connector *radeon_connector;
120 struct drm_connector *connector;
121
122 memset(new_attribs, 0, sizeof(new_attribs));
123 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
124 struct radeon_encoder *subenc;
125 struct radeon_encoder_mst *mst_enc;
126
127 radeon_connector = to_radeon_connector(connector);
128 if (!radeon_connector->is_mst_connector)
129 continue;
130
131 if (radeon_connector->mst_port != mst_conn)
132 continue;
133
134 subenc = radeon_connector->mst_encoder;
135 mst_enc = subenc->enc_priv;
136
137 if (!mst_enc->enc_active)
138 continue;
139
140 new_attribs[idx].fe = mst_enc->fe;
141 new_attribs[idx].slots = drm_dp_mst_get_vcpi_slots(&mst_conn->mst_mgr, mst_enc->port);
142 idx++;
143 }
144
145 for (i = 0; i < idx; i++) {
146 if (new_attribs[i].fe != mst_conn->cur_stream_attribs[i].fe ||
147 new_attribs[i].slots != mst_conn->cur_stream_attribs[i].slots) {
148 radeon_dp_mst_set_stream_attrib(primary, i, new_attribs[i].fe, new_attribs[i].slots);
149 mst_conn->cur_stream_attribs[i].fe = new_attribs[i].fe;
150 mst_conn->cur_stream_attribs[i].slots = new_attribs[i].slots;
151 }
152 }
153
154 for (i = idx; i < mst_conn->enabled_attribs; i++) {
155 radeon_dp_mst_set_stream_attrib(primary, i, 0, 0);
156 mst_conn->cur_stream_attribs[i].fe = 0;
157 mst_conn->cur_stream_attribs[i].slots = 0;
158 }
159 mst_conn->enabled_attribs = idx;
160 return 0;
161}
162
163static int radeon_dp_mst_set_vcp_size(struct radeon_encoder *mst, s64 avg_time_slots_per_mtp)
164{
165 struct drm_device *dev = mst->base.dev;
166 struct radeon_device *rdev = dev->dev_private;
167 struct radeon_encoder_mst *mst_enc = mst->enc_priv;
168 uint32_t val, temp;
169 uint32_t offset = radeon_atom_set_enc_offset(mst_enc->fe);
170 int retries = 0;
171 uint32_t x = drm_fixp2int(avg_time_slots_per_mtp);
172 uint32_t y = drm_fixp2int_ceil((avg_time_slots_per_mtp - x) << 26);
173
174 val = NI_DP_MSE_RATE_X(x) | NI_DP_MSE_RATE_Y(y);
175
176 WREG32(NI_DP_MSE_RATE_CNTL + offset, val);
177
178 do {
179 temp = RREG32(NI_DP_MSE_RATE_UPDATE + offset);
180 udelay(10);
181 } while ((temp & 0x1) && (retries++ < 10000));
182
183 if (retries >= 10000)
184 DRM_ERROR("timed out wait for rate cntl %d\n", mst_enc->fe);
185 return 0;
186}
187
188static int radeon_dp_mst_get_ddc_modes(struct drm_connector *connector)
189{
190 struct radeon_connector *radeon_connector = to_radeon_connector(connector);
191 struct radeon_connector *master = radeon_connector->mst_port;
192 struct edid *edid;
193 int ret = 0;
194
195 edid = drm_dp_mst_get_edid(connector, &master->mst_mgr, radeon_connector->port);
196 radeon_connector->edid = edid;
197 DRM_DEBUG_KMS("edid retrieved %p\n", edid);
198 if (radeon_connector->edid) {
199 drm_connector_update_edid_property(&radeon_connector->base, radeon_connector->edid);
200 ret = drm_add_edid_modes(&radeon_connector->base, radeon_connector->edid);
201 return ret;
202 }
203 drm_connector_update_edid_property(&radeon_connector->base, NULL);
204
205 return ret;
206}
207
208static int radeon_dp_mst_get_modes(struct drm_connector *connector)
209{
210 return radeon_dp_mst_get_ddc_modes(connector);
211}
212
213static enum drm_mode_status
214radeon_dp_mst_mode_valid(struct drm_connector *connector,
215 struct drm_display_mode *mode)
216{
217 /* TODO - validate mode against available PBN for link */
218 if (mode->clock < 10000)
219 return MODE_CLOCK_LOW;
220
221 if (mode->flags & DRM_MODE_FLAG_DBLCLK)
222 return MODE_H_ILLEGAL;
223
224 return MODE_OK;
225}
226
227static struct
228drm_encoder *radeon_mst_best_encoder(struct drm_connector *connector)
229{
230 struct radeon_connector *radeon_connector = to_radeon_connector(connector);
231
232 return &radeon_connector->mst_encoder->base;
233}
234
235static int
236radeon_dp_mst_detect(struct drm_connector *connector,
237 struct drm_modeset_acquire_ctx *ctx,
238 bool force)
239{
240 struct radeon_connector *radeon_connector =
241 to_radeon_connector(connector);
242 struct radeon_connector *master = radeon_connector->mst_port;
243
244 if (drm_connector_is_unregistered(connector))
245 return connector_status_disconnected;
246
247 return drm_dp_mst_detect_port(connector, ctx, &master->mst_mgr,
248 radeon_connector->port);
249}
250
251static const struct drm_connector_helper_funcs radeon_dp_mst_connector_helper_funcs = {
252 .get_modes = radeon_dp_mst_get_modes,
253 .mode_valid = radeon_dp_mst_mode_valid,
254 .best_encoder = radeon_mst_best_encoder,
255 .detect_ctx = radeon_dp_mst_detect,
256};
257
258static void
259radeon_dp_mst_connector_destroy(struct drm_connector *connector)
260{
261 struct radeon_connector *radeon_connector = to_radeon_connector(connector);
262 struct radeon_encoder *radeon_encoder = radeon_connector->mst_encoder;
263
264 drm_encoder_cleanup(&radeon_encoder->base);
265 kfree(radeon_encoder);
266 drm_connector_cleanup(connector);
267 kfree(radeon_connector);
268}
269
270static const struct drm_connector_funcs radeon_dp_mst_connector_funcs = {
271 .dpms = drm_helper_connector_dpms,
272 .fill_modes = drm_helper_probe_single_connector_modes,
273 .destroy = radeon_dp_mst_connector_destroy,
274};
275
276static struct drm_connector *radeon_dp_add_mst_connector(struct drm_dp_mst_topology_mgr *mgr,
277 struct drm_dp_mst_port *port,
278 const char *pathprop)
279{
280 struct radeon_connector *master = container_of(mgr, struct radeon_connector, mst_mgr);
281 struct drm_device *dev = master->base.dev;
282 struct radeon_connector *radeon_connector;
283 struct drm_connector *connector;
284
285 radeon_connector = kzalloc(sizeof(*radeon_connector), GFP_KERNEL);
286 if (!radeon_connector)
287 return NULL;
288
289 radeon_connector->is_mst_connector = true;
290 connector = &radeon_connector->base;
291 radeon_connector->port = port;
292 radeon_connector->mst_port = master;
293 DRM_DEBUG_KMS("\n");
294
295 drm_connector_init(dev, connector, &radeon_dp_mst_connector_funcs, DRM_MODE_CONNECTOR_DisplayPort);
296 drm_connector_helper_add(connector, &radeon_dp_mst_connector_helper_funcs);
297 radeon_connector->mst_encoder = radeon_dp_create_fake_mst_encoder(master);
298
299 drm_object_attach_property(&connector->base, dev->mode_config.path_property, 0);
300 drm_object_attach_property(&connector->base, dev->mode_config.tile_property, 0);
301 drm_connector_set_path_property(connector, pathprop);
302
303 return connector;
304}
305
306static const struct drm_dp_mst_topology_cbs mst_cbs = {
307 .add_connector = radeon_dp_add_mst_connector,
308};
309
310static struct
311radeon_connector *radeon_mst_find_connector(struct drm_encoder *encoder)
312{
313 struct drm_device *dev = encoder->dev;
314 struct drm_connector *connector;
315
316 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
317 struct radeon_connector *radeon_connector = to_radeon_connector(connector);
318 if (!connector->encoder)
319 continue;
320 if (!radeon_connector->is_mst_connector)
321 continue;
322
323 DRM_DEBUG_KMS("checking %p vs %p\n", connector->encoder, encoder);
324 if (connector->encoder == encoder)
325 return radeon_connector;
326 }
327 return NULL;
328}
329
330void radeon_dp_mst_prepare_pll(struct drm_crtc *crtc, struct drm_display_mode *mode)
331{
332 struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
333 struct drm_device *dev = crtc->dev;
334 struct radeon_device *rdev = dev->dev_private;
335 struct radeon_encoder *radeon_encoder = to_radeon_encoder(radeon_crtc->encoder);
336 struct radeon_encoder_mst *mst_enc = radeon_encoder->enc_priv;
337 struct radeon_connector *radeon_connector = radeon_mst_find_connector(&radeon_encoder->base);
338 int dp_clock;
339 struct radeon_connector_atom_dig *dig_connector = mst_enc->connector->con_priv;
340
341 if (radeon_connector) {
342 radeon_connector->pixelclock_for_modeset = mode->clock;
343 if (radeon_connector->base.display_info.bpc)
344 radeon_crtc->bpc = radeon_connector->base.display_info.bpc;
345 else
346 radeon_crtc->bpc = 8;
347 }
348
349 DRM_DEBUG_KMS("dp_clock %p %d\n", dig_connector, dig_connector->dp_clock);
350 dp_clock = dig_connector->dp_clock;
351 radeon_crtc->ss_enabled =
352 radeon_atombios_get_asic_ss_info(rdev, &radeon_crtc->ss,
353 ASIC_INTERNAL_SS_ON_DP,
354 dp_clock);
355}
356
357static void
358radeon_mst_encoder_dpms(struct drm_encoder *encoder, int mode)
359{
360 struct drm_device *dev = encoder->dev;
361 struct radeon_device *rdev = dev->dev_private;
362 struct radeon_encoder *radeon_encoder, *primary;
363 struct radeon_encoder_mst *mst_enc;
364 struct radeon_encoder_atom_dig *dig_enc;
365 struct radeon_connector *radeon_connector;
366 struct drm_crtc *crtc;
367 struct radeon_crtc *radeon_crtc;
368 int slots;
369 s64 fixed_pbn, fixed_pbn_per_slot, avg_time_slots_per_mtp;
370 if (!ASIC_IS_DCE5(rdev)) {
371 DRM_ERROR("got mst dpms on non-DCE5\n");
372 return;
373 }
374
375 radeon_connector = radeon_mst_find_connector(encoder);
376 if (!radeon_connector)
377 return;
378
379 radeon_encoder = to_radeon_encoder(encoder);
380
381 mst_enc = radeon_encoder->enc_priv;
382
383 primary = mst_enc->primary;
384
385 dig_enc = primary->enc_priv;
386
387 crtc = encoder->crtc;
388 DRM_DEBUG_KMS("got connector %d\n", dig_enc->active_mst_links);
389
390 switch (mode) {
391 case DRM_MODE_DPMS_ON:
392 dig_enc->active_mst_links++;
393
394 radeon_crtc = to_radeon_crtc(crtc);
395
396 if (dig_enc->active_mst_links == 1) {
397 mst_enc->fe = dig_enc->dig_encoder;
398 mst_enc->fe_from_be = true;
399 atombios_set_mst_encoder_crtc_source(encoder, mst_enc->fe);
400
401 atombios_dig_encoder_setup(&primary->base, ATOM_ENCODER_CMD_SETUP, 0);
402 atombios_dig_transmitter_setup2(&primary->base, ATOM_TRANSMITTER_ACTION_ENABLE,
403 0, 0, dig_enc->dig_encoder);
404
405 if (radeon_dp_needs_link_train(mst_enc->connector) ||
406 dig_enc->active_mst_links == 1) {
407 radeon_dp_link_train(&primary->base, &mst_enc->connector->base);
408 }
409
410 } else {
411 mst_enc->fe = radeon_atom_pick_dig_encoder(encoder, radeon_crtc->crtc_id);
412 if (mst_enc->fe == -1)
413 DRM_ERROR("failed to get frontend for dig encoder\n");
414 mst_enc->fe_from_be = false;
415 atombios_set_mst_encoder_crtc_source(encoder, mst_enc->fe);
416 }
417
418 DRM_DEBUG_KMS("dig encoder is %d %d %d\n", dig_enc->dig_encoder,
419 dig_enc->linkb, radeon_crtc->crtc_id);
420
421 slots = drm_dp_find_vcpi_slots(&radeon_connector->mst_port->mst_mgr,
422 mst_enc->pbn);
423 drm_dp_mst_allocate_vcpi(&radeon_connector->mst_port->mst_mgr,
424 radeon_connector->port,
425 mst_enc->pbn, slots);
426 drm_dp_update_payload_part1(&radeon_connector->mst_port->mst_mgr);
427
428 radeon_dp_mst_set_be_cntl(primary, mst_enc,
429 radeon_connector->mst_port->hpd.hpd, true);
430
431 mst_enc->enc_active = true;
432 radeon_dp_mst_update_stream_attribs(radeon_connector->mst_port, primary);
433
434 fixed_pbn = drm_int2fixp(mst_enc->pbn);
435 fixed_pbn_per_slot = drm_int2fixp(radeon_connector->mst_port->mst_mgr.pbn_div);
436 avg_time_slots_per_mtp = drm_fixp_div(fixed_pbn, fixed_pbn_per_slot);
437 radeon_dp_mst_set_vcp_size(radeon_encoder, avg_time_slots_per_mtp);
438
439 atombios_dig_encoder_setup2(&primary->base, ATOM_ENCODER_CMD_DP_VIDEO_ON, 0,
440 mst_enc->fe);
441 drm_dp_check_act_status(&radeon_connector->mst_port->mst_mgr);
442
443 drm_dp_update_payload_part2(&radeon_connector->mst_port->mst_mgr);
444
445 break;
446 case DRM_MODE_DPMS_STANDBY:
447 case DRM_MODE_DPMS_SUSPEND:
448 case DRM_MODE_DPMS_OFF:
449 DRM_ERROR("DPMS OFF %d\n", dig_enc->active_mst_links);
450
451 if (!mst_enc->enc_active)
452 return;
453
454 drm_dp_mst_reset_vcpi_slots(&radeon_connector->mst_port->mst_mgr, mst_enc->port);
455 drm_dp_update_payload_part1(&radeon_connector->mst_port->mst_mgr);
456
457 drm_dp_check_act_status(&radeon_connector->mst_port->mst_mgr);
458 /* and this can also fail */
459 drm_dp_update_payload_part2(&radeon_connector->mst_port->mst_mgr);
460
461 drm_dp_mst_deallocate_vcpi(&radeon_connector->mst_port->mst_mgr, mst_enc->port);
462
463 mst_enc->enc_active = false;
464 radeon_dp_mst_update_stream_attribs(radeon_connector->mst_port, primary);
465
466 radeon_dp_mst_set_be_cntl(primary, mst_enc,
467 radeon_connector->mst_port->hpd.hpd, false);
468 atombios_dig_encoder_setup2(&primary->base, ATOM_ENCODER_CMD_DP_VIDEO_OFF, 0,
469 mst_enc->fe);
470
471 if (!mst_enc->fe_from_be)
472 radeon_atom_release_dig_encoder(rdev, mst_enc->fe);
473
474 mst_enc->fe_from_be = false;
475 dig_enc->active_mst_links--;
476 if (dig_enc->active_mst_links == 0) {
477 /* drop link */
478 }
479
480 break;
481 }
482
483}
484
485static bool radeon_mst_mode_fixup(struct drm_encoder *encoder,
486 const struct drm_display_mode *mode,
487 struct drm_display_mode *adjusted_mode)
488{
489 struct radeon_encoder_mst *mst_enc;
490 struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
491 struct radeon_connector_atom_dig *dig_connector;
492 int bpp = 24;
493
494 mst_enc = radeon_encoder->enc_priv;
495
496 mst_enc->pbn = drm_dp_calc_pbn_mode(adjusted_mode->clock, bpp, false);
497
498 mst_enc->primary->active_device = mst_enc->primary->devices & mst_enc->connector->devices;
499 DRM_DEBUG_KMS("setting active device to %08x from %08x %08x for encoder %d\n",
500 mst_enc->primary->active_device, mst_enc->primary->devices,
501 mst_enc->connector->devices, mst_enc->primary->base.encoder_type);
502
503
504 drm_mode_set_crtcinfo(adjusted_mode, 0);
505 dig_connector = mst_enc->connector->con_priv;
506 dig_connector->dp_lane_count = drm_dp_max_lane_count(dig_connector->dpcd);
507 dig_connector->dp_clock = drm_dp_max_link_rate(dig_connector->dpcd);
508 DRM_DEBUG_KMS("dig clock %p %d %d\n", dig_connector,
509 dig_connector->dp_lane_count, dig_connector->dp_clock);
510 return true;
511}
512
513static void radeon_mst_encoder_prepare(struct drm_encoder *encoder)
514{
515 struct radeon_connector *radeon_connector;
516 struct radeon_encoder *radeon_encoder, *primary;
517 struct radeon_encoder_mst *mst_enc;
518 struct radeon_encoder_atom_dig *dig_enc;
519
520 radeon_connector = radeon_mst_find_connector(encoder);
521 if (!radeon_connector) {
522 DRM_DEBUG_KMS("failed to find connector %p\n", encoder);
523 return;
524 }
525 radeon_encoder = to_radeon_encoder(encoder);
526
527 radeon_mst_encoder_dpms(encoder, DRM_MODE_DPMS_OFF);
528
529 mst_enc = radeon_encoder->enc_priv;
530
531 primary = mst_enc->primary;
532
533 dig_enc = primary->enc_priv;
534
535 mst_enc->port = radeon_connector->port;
536
537 if (dig_enc->dig_encoder == -1) {
538 dig_enc->dig_encoder = radeon_atom_pick_dig_encoder(&primary->base, -1);
539 primary->offset = radeon_atom_set_enc_offset(dig_enc->dig_encoder);
540 atombios_set_mst_encoder_crtc_source(encoder, dig_enc->dig_encoder);
541
542
543 }
544 DRM_DEBUG_KMS("%d %d\n", dig_enc->dig_encoder, primary->offset);
545}
546
547static void
548radeon_mst_encoder_mode_set(struct drm_encoder *encoder,
549 struct drm_display_mode *mode,
550 struct drm_display_mode *adjusted_mode)
551{
552 DRM_DEBUG_KMS("\n");
553}
554
555static void radeon_mst_encoder_commit(struct drm_encoder *encoder)
556{
557 radeon_mst_encoder_dpms(encoder, DRM_MODE_DPMS_ON);
558 DRM_DEBUG_KMS("\n");
559}
560
561static const struct drm_encoder_helper_funcs radeon_mst_helper_funcs = {
562 .dpms = radeon_mst_encoder_dpms,
563 .mode_fixup = radeon_mst_mode_fixup,
564 .prepare = radeon_mst_encoder_prepare,
565 .mode_set = radeon_mst_encoder_mode_set,
566 .commit = radeon_mst_encoder_commit,
567};
568
569static void radeon_dp_mst_encoder_destroy(struct drm_encoder *encoder)
570{
571 drm_encoder_cleanup(encoder);
572 kfree(encoder);
573}
574
575static const struct drm_encoder_funcs radeon_dp_mst_enc_funcs = {
576 .destroy = radeon_dp_mst_encoder_destroy,
577};
578
579static struct radeon_encoder *
580radeon_dp_create_fake_mst_encoder(struct radeon_connector *connector)
581{
582 struct drm_device *dev = connector->base.dev;
583 struct radeon_device *rdev = dev->dev_private;
584 struct radeon_encoder *radeon_encoder;
585 struct radeon_encoder_mst *mst_enc;
586 struct drm_encoder *encoder;
587 const struct drm_connector_helper_funcs *connector_funcs = connector->base.helper_private;
588 struct drm_encoder *enc_master = connector_funcs->best_encoder(&connector->base);
589
590 DRM_DEBUG_KMS("enc master is %p\n", enc_master);
591 radeon_encoder = kzalloc(sizeof(*radeon_encoder), GFP_KERNEL);
592 if (!radeon_encoder)
593 return NULL;
594
595 radeon_encoder->enc_priv = kzalloc(sizeof(*mst_enc), GFP_KERNEL);
596 if (!radeon_encoder->enc_priv) {
597 kfree(radeon_encoder);
598 return NULL;
599 }
600 encoder = &radeon_encoder->base;
601 switch (rdev->num_crtc) {
602 case 1:
603 encoder->possible_crtcs = 0x1;
604 break;
605 case 2:
606 default:
607 encoder->possible_crtcs = 0x3;
608 break;
609 case 4:
610 encoder->possible_crtcs = 0xf;
611 break;
612 case 6:
613 encoder->possible_crtcs = 0x3f;
614 break;
615 }
616
617 drm_encoder_init(dev, &radeon_encoder->base, &radeon_dp_mst_enc_funcs,
618 DRM_MODE_ENCODER_DPMST, NULL);
619 drm_encoder_helper_add(encoder, &radeon_mst_helper_funcs);
620
621 mst_enc = radeon_encoder->enc_priv;
622 mst_enc->connector = connector;
623 mst_enc->primary = to_radeon_encoder(enc_master);
624 radeon_encoder->is_mst_encoder = true;
625 return radeon_encoder;
626}
627
628int
629radeon_dp_mst_init(struct radeon_connector *radeon_connector)
630{
631 struct drm_device *dev = radeon_connector->base.dev;
632 int max_link_rate;
633
634 if (!radeon_connector->ddc_bus->has_aux)
635 return 0;
636
637 if (radeon_connector_is_dp12_capable(&radeon_connector->base))
638 max_link_rate = 0x14;
639 else
640 max_link_rate = 0x0a;
641
642 radeon_connector->mst_mgr.cbs = &mst_cbs;
643 return drm_dp_mst_topology_mgr_init(&radeon_connector->mst_mgr, dev,
644 &radeon_connector->ddc_bus->aux, 16, 6,
645 4, drm_dp_bw_code_to_link_rate(max_link_rate),
646 radeon_connector->base.base.id);
647}
648
649int
650radeon_dp_mst_probe(struct radeon_connector *radeon_connector)
651{
652 struct radeon_connector_atom_dig *dig_connector = radeon_connector->con_priv;
653 struct drm_device *dev = radeon_connector->base.dev;
654 struct radeon_device *rdev = dev->dev_private;
655 int ret;
656 u8 msg[1];
657
658 if (!radeon_mst)
659 return 0;
660
661 if (!ASIC_IS_DCE5(rdev))
662 return 0;
663
664 if (dig_connector->dpcd[DP_DPCD_REV] < 0x12)
665 return 0;
666
667 ret = drm_dp_dpcd_read(&radeon_connector->ddc_bus->aux, DP_MSTM_CAP, msg,
668 1);
669 if (ret) {
670 if (msg[0] & DP_MST_CAP) {
671 DRM_DEBUG_KMS("Sink is MST capable\n");
672 dig_connector->is_mst = true;
673 } else {
674 DRM_DEBUG_KMS("Sink is not MST capable\n");
675 dig_connector->is_mst = false;
676 }
677
678 }
679 drm_dp_mst_topology_mgr_set_mst(&radeon_connector->mst_mgr,
680 dig_connector->is_mst);
681 return dig_connector->is_mst;
682}
683
684int
685radeon_dp_mst_check_status(struct radeon_connector *radeon_connector)
686{
687 struct radeon_connector_atom_dig *dig_connector = radeon_connector->con_priv;
688 int retry;
689
690 if (dig_connector->is_mst) {
691 u8 esi[16] = { 0 };
692 int dret;
693 int ret = 0;
694 bool handled;
695
696 dret = drm_dp_dpcd_read(&radeon_connector->ddc_bus->aux,
697 DP_SINK_COUNT_ESI, esi, 8);
698go_again:
699 if (dret == 8) {
700 DRM_DEBUG_KMS("got esi %3ph\n", esi);
701 ret = drm_dp_mst_hpd_irq(&radeon_connector->mst_mgr, esi, &handled);
702
703 if (handled) {
704 for (retry = 0; retry < 3; retry++) {
705 int wret;
706 wret = drm_dp_dpcd_write(&radeon_connector->ddc_bus->aux,
707 DP_SINK_COUNT_ESI + 1, &esi[1], 3);
708 if (wret == 3)
709 break;
710 }
711
712 dret = drm_dp_dpcd_read(&radeon_connector->ddc_bus->aux,
713 DP_SINK_COUNT_ESI, esi, 8);
714 if (dret == 8) {
715 DRM_DEBUG_KMS("got esi2 %3ph\n", esi);
716 goto go_again;
717 }
718 } else
719 ret = 0;
720
721 return ret;
722 } else {
723 DRM_DEBUG_KMS("failed to get ESI - device may have failed %d\n", ret);
724 dig_connector->is_mst = false;
725 drm_dp_mst_topology_mgr_set_mst(&radeon_connector->mst_mgr,
726 dig_connector->is_mst);
727 /* send a hotplug event */
728 }
729 }
730 return -EINVAL;
731}
732
733#if defined(CONFIG_DEBUG_FS)
734
735static int radeon_debugfs_mst_info_show(struct seq_file *m, void *unused)
736{
737 struct radeon_device *rdev = (struct radeon_device *)m->private;
738 struct drm_device *dev = rdev->ddev;
739 struct drm_connector *connector;
740 struct radeon_connector *radeon_connector;
741 struct radeon_connector_atom_dig *dig_connector;
742 int i;
743
744 drm_modeset_lock_all(dev);
745 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
746 if (connector->connector_type != DRM_MODE_CONNECTOR_DisplayPort)
747 continue;
748
749 radeon_connector = to_radeon_connector(connector);
750 dig_connector = radeon_connector->con_priv;
751 if (radeon_connector->is_mst_connector)
752 continue;
753 if (!dig_connector->is_mst)
754 continue;
755 drm_dp_mst_dump_topology(m, &radeon_connector->mst_mgr);
756
757 for (i = 0; i < radeon_connector->enabled_attribs; i++)
758 seq_printf(m, "attrib %d: %d %d\n", i,
759 radeon_connector->cur_stream_attribs[i].fe,
760 radeon_connector->cur_stream_attribs[i].slots);
761 }
762 drm_modeset_unlock_all(dev);
763 return 0;
764}
765
766DEFINE_SHOW_ATTRIBUTE(radeon_debugfs_mst_info);
767#endif
768
769void radeon_mst_debugfs_init(struct radeon_device *rdev)
770{
771#if defined(CONFIG_DEBUG_FS)
772 struct dentry *root = rdev->ddev->primary->debugfs_root;
773
774 debugfs_create_file("radeon_mst_info", 0444, root, rdev,
775 &radeon_debugfs_mst_info_fops);
776
777#endif
778}