2 * Copyright © 2008 Intel Corporation
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:
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
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
26 #include <drm/drm_atomic_helper.h>
27 #include <drm/drm_edid.h>
28 #include <drm/drm_probe_helper.h>
31 #include "intel_atomic.h"
32 #include "intel_audio.h"
33 #include "intel_connector.h"
34 #include "intel_ddi.h"
35 #include "intel_display_types.h"
36 #include "intel_hotplug.h"
38 #include "intel_dp_mst.h"
39 #include "intel_dpio_phy.h"
41 static int intel_dp_mst_compute_link_config(struct intel_encoder *encoder,
42 struct intel_crtc_state *crtc_state,
43 struct drm_connector_state *conn_state,
44 struct link_config_limits *limits)
46 struct drm_atomic_state *state = crtc_state->uapi.state;
47 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
48 struct intel_dp *intel_dp = &intel_mst->primary->dp;
49 struct intel_connector *connector =
50 to_intel_connector(conn_state->connector);
51 struct drm_i915_private *i915 = to_i915(connector->base.dev);
52 const struct drm_display_mode *adjusted_mode =
53 &crtc_state->hw.adjusted_mode;
54 bool constant_n = drm_dp_has_quirk(&intel_dp->desc, 0,
55 DP_DPCD_QUIRK_CONSTANT_N);
56 int bpp, slots = -EINVAL;
58 crtc_state->lane_count = limits->max_lane_count;
59 crtc_state->port_clock = limits->max_clock;
61 for (bpp = limits->max_bpp; bpp >= limits->min_bpp; bpp -= 2 * 3) {
62 crtc_state->pipe_bpp = bpp;
64 crtc_state->pbn = drm_dp_calc_pbn_mode(adjusted_mode->crtc_clock,
68 slots = drm_dp_atomic_find_vcpi_slots(state, &intel_dp->mst_mgr,
71 if (slots == -EDEADLK)
78 drm_dbg_kms(&i915->drm, "failed finding vcpi slots:%d\n",
83 intel_link_compute_m_n(crtc_state->pipe_bpp,
84 crtc_state->lane_count,
85 adjusted_mode->crtc_clock,
86 crtc_state->port_clock,
88 constant_n, crtc_state->fec_enable);
89 crtc_state->dp_m_n.tu = slots;
94 static int intel_dp_mst_compute_config(struct intel_encoder *encoder,
95 struct intel_crtc_state *pipe_config,
96 struct drm_connector_state *conn_state)
98 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
99 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
100 struct intel_dp *intel_dp = &intel_mst->primary->dp;
101 struct intel_connector *connector =
102 to_intel_connector(conn_state->connector);
103 struct intel_digital_connector_state *intel_conn_state =
104 to_intel_digital_connector_state(conn_state);
105 const struct drm_display_mode *adjusted_mode =
106 &pipe_config->hw.adjusted_mode;
107 struct link_config_limits limits;
110 if (adjusted_mode->flags & DRM_MODE_FLAG_DBLSCAN)
113 pipe_config->output_format = INTEL_OUTPUT_FORMAT_RGB;
114 pipe_config->has_pch_encoder = false;
116 if (intel_conn_state->force_audio == HDMI_AUDIO_AUTO)
117 pipe_config->has_audio = connector->port->has_audio;
119 pipe_config->has_audio =
120 intel_conn_state->force_audio == HDMI_AUDIO_ON;
123 * for MST we always configure max link bw - the spec doesn't
124 * seem to suggest we should do otherwise.
127 limits.max_clock = intel_dp_max_link_rate(intel_dp);
129 limits.min_lane_count =
130 limits.max_lane_count = intel_dp_max_lane_count(intel_dp);
132 limits.min_bpp = intel_dp_min_bpp(pipe_config);
134 * FIXME: If all the streams can't fit into the link with
135 * their current pipe_bpp we should reduce pipe_bpp across
136 * the board until things start to fit. Until then we
137 * limit to <= 8bpc since that's what was hardcoded for all
138 * MST streams previously. This hack should be removed once
139 * we have the proper retry logic in place.
141 limits.max_bpp = min(pipe_config->pipe_bpp, 24);
143 intel_dp_adjust_compliance_config(intel_dp, pipe_config, &limits);
145 ret = intel_dp_mst_compute_link_config(encoder, pipe_config,
146 conn_state, &limits);
150 pipe_config->limited_color_range =
151 intel_dp_limited_color_range(pipe_config, conn_state);
153 if (IS_GEN9_LP(dev_priv))
154 pipe_config->lane_lat_optim_mask =
155 bxt_ddi_phy_calc_lane_lat_optim_mask(pipe_config->lane_count);
157 intel_ddi_compute_min_voltage_level(dev_priv, pipe_config);
163 * Iterate over all connectors and return a mask of
164 * all CPU transcoders streaming over the same DP link.
167 intel_dp_mst_transcoder_mask(struct intel_atomic_state *state,
168 struct intel_dp *mst_port)
170 struct drm_i915_private *dev_priv = to_i915(state->base.dev);
171 const struct intel_digital_connector_state *conn_state;
172 struct intel_connector *connector;
176 if (INTEL_GEN(dev_priv) < 12)
179 for_each_new_intel_connector_in_state(state, connector, conn_state, i) {
180 const struct intel_crtc_state *crtc_state;
181 struct intel_crtc *crtc;
183 if (connector->mst_port != mst_port || !conn_state->base.crtc)
186 crtc = to_intel_crtc(conn_state->base.crtc);
187 crtc_state = intel_atomic_get_new_crtc_state(state, crtc);
189 if (!crtc_state->hw.active)
192 transcoders |= BIT(crtc_state->cpu_transcoder);
198 static int intel_dp_mst_compute_config_late(struct intel_encoder *encoder,
199 struct intel_crtc_state *crtc_state,
200 struct drm_connector_state *conn_state)
202 struct intel_atomic_state *state = to_intel_atomic_state(conn_state->state);
203 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
204 struct intel_dp *intel_dp = &intel_mst->primary->dp;
206 /* lowest numbered transcoder will be designated master */
207 crtc_state->mst_master_transcoder =
208 ffs(intel_dp_mst_transcoder_mask(state, intel_dp)) - 1;
214 * If one of the connectors in a MST stream needs a modeset, mark all CRTCs
215 * that shares the same MST stream as mode changed,
216 * intel_modeset_pipe_config()+intel_crtc_check_fastset() will take care to do
217 * a fastset when possible.
220 intel_dp_mst_atomic_master_trans_check(struct intel_connector *connector,
221 struct intel_atomic_state *state)
223 struct drm_i915_private *dev_priv = to_i915(state->base.dev);
224 struct drm_connector_list_iter connector_list_iter;
225 struct intel_connector *connector_iter;
227 if (INTEL_GEN(dev_priv) < 12)
230 if (!intel_connector_needs_modeset(state, &connector->base))
233 drm_connector_list_iter_begin(&dev_priv->drm, &connector_list_iter);
234 for_each_intel_connector_iter(connector_iter, &connector_list_iter) {
235 struct intel_digital_connector_state *conn_iter_state;
236 struct intel_crtc_state *crtc_state;
237 struct intel_crtc *crtc;
240 if (connector_iter->mst_port != connector->mst_port ||
241 connector_iter == connector)
244 conn_iter_state = intel_atomic_get_digital_connector_state(state,
246 if (IS_ERR(conn_iter_state)) {
247 drm_connector_list_iter_end(&connector_list_iter);
248 return PTR_ERR(conn_iter_state);
251 if (!conn_iter_state->base.crtc)
254 crtc = to_intel_crtc(conn_iter_state->base.crtc);
255 crtc_state = intel_atomic_get_crtc_state(&state->base, crtc);
256 if (IS_ERR(crtc_state)) {
257 drm_connector_list_iter_end(&connector_list_iter);
258 return PTR_ERR(crtc_state);
261 ret = drm_atomic_add_affected_planes(&state->base, &crtc->base);
263 drm_connector_list_iter_end(&connector_list_iter);
266 crtc_state->uapi.mode_changed = true;
268 drm_connector_list_iter_end(&connector_list_iter);
274 intel_dp_mst_atomic_check(struct drm_connector *connector,
275 struct drm_atomic_state *_state)
277 struct intel_atomic_state *state = to_intel_atomic_state(_state);
278 struct drm_connector_state *new_conn_state =
279 drm_atomic_get_new_connector_state(&state->base, connector);
280 struct drm_connector_state *old_conn_state =
281 drm_atomic_get_old_connector_state(&state->base, connector);
282 struct intel_connector *intel_connector =
283 to_intel_connector(connector);
284 struct drm_crtc *new_crtc = new_conn_state->crtc;
285 struct drm_dp_mst_topology_mgr *mgr;
288 ret = intel_digital_connector_atomic_check(connector, &state->base);
292 ret = intel_dp_mst_atomic_master_trans_check(intel_connector, state);
296 if (!old_conn_state->crtc)
299 /* We only want to free VCPI if this state disables the CRTC on this
303 struct intel_crtc *intel_crtc = to_intel_crtc(new_crtc);
304 struct intel_crtc_state *crtc_state =
305 intel_atomic_get_new_crtc_state(state, intel_crtc);
308 !drm_atomic_crtc_needs_modeset(&crtc_state->uapi) ||
309 crtc_state->uapi.enable)
313 mgr = &enc_to_mst(to_intel_encoder(old_conn_state->best_encoder))->primary->dp.mst_mgr;
314 ret = drm_dp_atomic_release_vcpi_slots(&state->base, mgr,
315 intel_connector->port);
320 static void clear_act_sent(struct intel_dp *intel_dp)
322 struct drm_i915_private *i915 = dp_to_i915(intel_dp);
324 intel_de_write(i915, intel_dp->regs.dp_tp_status,
325 DP_TP_STATUS_ACT_SENT);
328 static void wait_for_act_sent(struct intel_dp *intel_dp)
330 struct drm_i915_private *i915 = dp_to_i915(intel_dp);
332 if (intel_de_wait_for_set(i915, intel_dp->regs.dp_tp_status,
333 DP_TP_STATUS_ACT_SENT, 1))
334 drm_err(&i915->drm, "Timed out waiting for ACT sent\n");
336 drm_dp_check_act_status(&intel_dp->mst_mgr);
339 static void intel_mst_disable_dp(struct intel_atomic_state *state,
340 struct intel_encoder *encoder,
341 const struct intel_crtc_state *old_crtc_state,
342 const struct drm_connector_state *old_conn_state)
344 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
345 struct intel_digital_port *intel_dig_port = intel_mst->primary;
346 struct intel_dp *intel_dp = &intel_dig_port->dp;
347 struct intel_connector *connector =
348 to_intel_connector(old_conn_state->connector);
349 struct drm_i915_private *i915 = to_i915(connector->base.dev);
352 drm_dbg_kms(&i915->drm, "active links %d\n",
353 intel_dp->active_mst_links);
355 drm_dp_mst_reset_vcpi_slots(&intel_dp->mst_mgr, connector->port);
357 ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
359 drm_dbg_kms(&i915->drm, "failed to update payload %d\n", ret);
361 if (old_crtc_state->has_audio)
362 intel_audio_codec_disable(encoder,
363 old_crtc_state, old_conn_state);
366 static void intel_mst_post_disable_dp(struct intel_atomic_state *state,
367 struct intel_encoder *encoder,
368 const struct intel_crtc_state *old_crtc_state,
369 const struct drm_connector_state *old_conn_state)
371 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
372 struct intel_digital_port *intel_dig_port = intel_mst->primary;
373 struct intel_dp *intel_dp = &intel_dig_port->dp;
374 struct intel_connector *connector =
375 to_intel_connector(old_conn_state->connector);
376 struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
377 bool last_mst_stream;
380 intel_dp->active_mst_links--;
381 last_mst_stream = intel_dp->active_mst_links == 0;
382 drm_WARN_ON(&dev_priv->drm,
383 INTEL_GEN(dev_priv) >= 12 && last_mst_stream &&
384 !intel_dp_mst_is_master_trans(old_crtc_state));
386 intel_crtc_vblank_off(old_crtc_state);
388 intel_disable_pipe(old_crtc_state);
390 drm_dp_update_payload_part2(&intel_dp->mst_mgr);
392 clear_act_sent(intel_dp);
394 val = intel_de_read(dev_priv,
395 TRANS_DDI_FUNC_CTL(old_crtc_state->cpu_transcoder));
396 val &= ~TRANS_DDI_DP_VC_PAYLOAD_ALLOC;
397 intel_de_write(dev_priv,
398 TRANS_DDI_FUNC_CTL(old_crtc_state->cpu_transcoder),
401 wait_for_act_sent(intel_dp);
403 drm_dp_mst_deallocate_vcpi(&intel_dp->mst_mgr, connector->port);
405 intel_ddi_disable_transcoder_func(old_crtc_state);
407 if (INTEL_GEN(dev_priv) >= 9)
408 skl_scaler_disable(old_crtc_state);
410 ilk_pfit_disable(old_crtc_state);
413 * Power down mst path before disabling the port, otherwise we end
414 * up getting interrupts from the sink upon detecting link loss.
416 drm_dp_send_power_updown_phy(&intel_dp->mst_mgr, connector->port,
420 * BSpec 4287: disable DIP after the transcoder is disabled and before
421 * the transcoder clock select is set to none.
424 intel_dp_set_infoframes(&intel_dig_port->base, false,
425 old_crtc_state, NULL);
427 * From TGL spec: "If multi-stream slave transcoder: Configure
428 * Transcoder Clock Select to direct no clock to the transcoder"
430 * From older GENs spec: "Configure Transcoder Clock Select to direct
431 * no clock to the transcoder"
433 if (INTEL_GEN(dev_priv) < 12 || !last_mst_stream)
434 intel_ddi_disable_pipe_clock(old_crtc_state);
437 intel_mst->connector = NULL;
439 intel_dig_port->base.post_disable(state, &intel_dig_port->base,
440 old_crtc_state, NULL);
442 drm_dbg_kms(&dev_priv->drm, "active links %d\n",
443 intel_dp->active_mst_links);
446 static void intel_mst_pre_pll_enable_dp(struct intel_atomic_state *state,
447 struct intel_encoder *encoder,
448 const struct intel_crtc_state *pipe_config,
449 const struct drm_connector_state *conn_state)
451 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
452 struct intel_digital_port *intel_dig_port = intel_mst->primary;
453 struct intel_dp *intel_dp = &intel_dig_port->dp;
455 if (intel_dp->active_mst_links == 0)
456 intel_dig_port->base.pre_pll_enable(state, &intel_dig_port->base,
460 static void intel_mst_pre_enable_dp(struct intel_atomic_state *state,
461 struct intel_encoder *encoder,
462 const struct intel_crtc_state *pipe_config,
463 const struct drm_connector_state *conn_state)
465 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
466 struct intel_digital_port *intel_dig_port = intel_mst->primary;
467 struct intel_dp *intel_dp = &intel_dig_port->dp;
468 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
469 struct intel_connector *connector =
470 to_intel_connector(conn_state->connector);
472 bool first_mst_stream;
474 /* MST encoders are bound to a crtc, not to a connector,
475 * force the mapping here for get_hw_state.
477 connector->encoder = encoder;
478 intel_mst->connector = connector;
479 first_mst_stream = intel_dp->active_mst_links == 0;
480 drm_WARN_ON(&dev_priv->drm,
481 INTEL_GEN(dev_priv) >= 12 && first_mst_stream &&
482 !intel_dp_mst_is_master_trans(pipe_config));
484 drm_dbg_kms(&dev_priv->drm, "active links %d\n",
485 intel_dp->active_mst_links);
487 if (first_mst_stream)
488 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON);
490 drm_dp_send_power_updown_phy(&intel_dp->mst_mgr, connector->port, true);
492 if (first_mst_stream)
493 intel_dig_port->base.pre_enable(state, &intel_dig_port->base,
496 ret = drm_dp_mst_allocate_vcpi(&intel_dp->mst_mgr,
499 pipe_config->dp_m_n.tu);
501 drm_err(&dev_priv->drm, "failed to allocate vcpi\n");
503 intel_dp->active_mst_links++;
505 ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
508 * Before Gen 12 this is not done as part of
509 * intel_dig_port->base.pre_enable() and should be done here. For
510 * Gen 12+ the step in which this should be done is different for the
511 * first MST stream, so it's done on the DDI for the first stream and
512 * here for the following ones.
514 if (INTEL_GEN(dev_priv) < 12 || !first_mst_stream)
515 intel_ddi_enable_pipe_clock(encoder, pipe_config);
517 intel_ddi_set_dp_msa(pipe_config, conn_state);
519 intel_dp_set_m_n(pipe_config, M1_N1);
522 static void intel_mst_enable_dp(struct intel_atomic_state *state,
523 struct intel_encoder *encoder,
524 const struct intel_crtc_state *pipe_config,
525 const struct drm_connector_state *conn_state)
527 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
528 struct intel_digital_port *intel_dig_port = intel_mst->primary;
529 struct intel_dp *intel_dp = &intel_dig_port->dp;
530 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
533 drm_WARN_ON(&dev_priv->drm, pipe_config->has_pch_encoder);
535 clear_act_sent(intel_dp);
537 intel_ddi_enable_transcoder_func(encoder, pipe_config);
539 val = intel_de_read(dev_priv,
540 TRANS_DDI_FUNC_CTL(pipe_config->cpu_transcoder));
541 val |= TRANS_DDI_DP_VC_PAYLOAD_ALLOC;
542 intel_de_write(dev_priv,
543 TRANS_DDI_FUNC_CTL(pipe_config->cpu_transcoder),
546 drm_dbg_kms(&dev_priv->drm, "active links %d\n",
547 intel_dp->active_mst_links);
549 wait_for_act_sent(intel_dp);
551 drm_dp_update_payload_part2(&intel_dp->mst_mgr);
553 intel_enable_pipe(pipe_config);
555 intel_crtc_vblank_on(pipe_config);
557 if (pipe_config->has_audio)
558 intel_audio_codec_enable(encoder, pipe_config, conn_state);
561 static bool intel_dp_mst_enc_get_hw_state(struct intel_encoder *encoder,
564 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
565 *pipe = intel_mst->pipe;
566 if (intel_mst->connector)
571 static void intel_dp_mst_enc_get_config(struct intel_encoder *encoder,
572 struct intel_crtc_state *pipe_config)
574 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
575 struct intel_digital_port *intel_dig_port = intel_mst->primary;
577 intel_ddi_get_config(&intel_dig_port->base, pipe_config);
580 static int intel_dp_mst_get_ddc_modes(struct drm_connector *connector)
582 struct intel_connector *intel_connector = to_intel_connector(connector);
583 struct intel_dp *intel_dp = intel_connector->mst_port;
587 if (drm_connector_is_unregistered(connector))
588 return intel_connector_update_modes(connector, NULL);
590 edid = drm_dp_mst_get_edid(connector, &intel_dp->mst_mgr, intel_connector->port);
591 ret = intel_connector_update_modes(connector, edid);
598 intel_dp_mst_connector_late_register(struct drm_connector *connector)
600 struct intel_connector *intel_connector = to_intel_connector(connector);
603 ret = drm_dp_mst_connector_late_register(connector,
604 intel_connector->port);
608 ret = intel_connector_register(connector);
610 drm_dp_mst_connector_early_unregister(connector,
611 intel_connector->port);
617 intel_dp_mst_connector_early_unregister(struct drm_connector *connector)
619 struct intel_connector *intel_connector = to_intel_connector(connector);
621 intel_connector_unregister(connector);
622 drm_dp_mst_connector_early_unregister(connector,
623 intel_connector->port);
626 static const struct drm_connector_funcs intel_dp_mst_connector_funcs = {
627 .fill_modes = drm_helper_probe_single_connector_modes,
628 .atomic_get_property = intel_digital_connector_atomic_get_property,
629 .atomic_set_property = intel_digital_connector_atomic_set_property,
630 .late_register = intel_dp_mst_connector_late_register,
631 .early_unregister = intel_dp_mst_connector_early_unregister,
632 .destroy = intel_connector_destroy,
633 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
634 .atomic_duplicate_state = intel_digital_connector_duplicate_state,
637 static int intel_dp_mst_get_modes(struct drm_connector *connector)
639 return intel_dp_mst_get_ddc_modes(connector);
642 static enum drm_mode_status
643 intel_dp_mst_mode_valid(struct drm_connector *connector,
644 struct drm_display_mode *mode)
646 struct drm_i915_private *dev_priv = to_i915(connector->dev);
647 struct intel_connector *intel_connector = to_intel_connector(connector);
648 struct intel_dp *intel_dp = intel_connector->mst_port;
649 int max_dotclk = to_i915(connector->dev)->max_dotclk_freq;
650 int max_rate, mode_rate, max_lanes, max_link_clock;
652 if (drm_connector_is_unregistered(connector))
655 if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
656 return MODE_NO_DBLESCAN;
658 max_link_clock = intel_dp_max_link_rate(intel_dp);
659 max_lanes = intel_dp_max_lane_count(intel_dp);
661 max_rate = intel_dp_max_data_rate(max_link_clock, max_lanes);
662 mode_rate = intel_dp_link_required(mode->clock, 18);
664 /* TODO - validate mode against available PBN for link */
665 if (mode->clock < 10000)
666 return MODE_CLOCK_LOW;
668 if (mode->flags & DRM_MODE_FLAG_DBLCLK)
669 return MODE_H_ILLEGAL;
671 if (mode_rate > max_rate || mode->clock > max_dotclk)
672 return MODE_CLOCK_HIGH;
674 return intel_mode_valid_max_plane_size(dev_priv, mode);
677 static struct drm_encoder *intel_mst_atomic_best_encoder(struct drm_connector *connector,
678 struct drm_connector_state *state)
680 struct intel_connector *intel_connector = to_intel_connector(connector);
681 struct intel_dp *intel_dp = intel_connector->mst_port;
682 struct intel_crtc *crtc = to_intel_crtc(state->crtc);
684 return &intel_dp->mst_encoders[crtc->pipe]->base.base;
688 intel_dp_mst_detect(struct drm_connector *connector,
689 struct drm_modeset_acquire_ctx *ctx, bool force)
691 struct intel_connector *intel_connector = to_intel_connector(connector);
692 struct intel_dp *intel_dp = intel_connector->mst_port;
694 if (drm_connector_is_unregistered(connector))
695 return connector_status_disconnected;
697 return drm_dp_mst_detect_port(connector, ctx, &intel_dp->mst_mgr,
698 intel_connector->port);
701 static const struct drm_connector_helper_funcs intel_dp_mst_connector_helper_funcs = {
702 .get_modes = intel_dp_mst_get_modes,
703 .mode_valid = intel_dp_mst_mode_valid,
704 .atomic_best_encoder = intel_mst_atomic_best_encoder,
705 .atomic_check = intel_dp_mst_atomic_check,
706 .detect_ctx = intel_dp_mst_detect,
709 static void intel_dp_mst_encoder_destroy(struct drm_encoder *encoder)
711 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(to_intel_encoder(encoder));
713 drm_encoder_cleanup(encoder);
717 static const struct drm_encoder_funcs intel_dp_mst_enc_funcs = {
718 .destroy = intel_dp_mst_encoder_destroy,
721 static bool intel_dp_mst_get_hw_state(struct intel_connector *connector)
723 if (intel_attached_encoder(connector) && connector->base.state->crtc) {
725 if (!intel_attached_encoder(connector)->get_hw_state(intel_attached_encoder(connector), &pipe))
732 static struct drm_connector *intel_dp_add_mst_connector(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port, const char *pathprop)
734 struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr);
735 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
736 struct drm_device *dev = intel_dig_port->base.base.dev;
737 struct drm_i915_private *dev_priv = to_i915(dev);
738 struct intel_connector *intel_connector;
739 struct drm_connector *connector;
743 intel_connector = intel_connector_alloc();
744 if (!intel_connector)
747 intel_connector->get_hw_state = intel_dp_mst_get_hw_state;
748 intel_connector->mst_port = intel_dp;
749 intel_connector->port = port;
750 drm_dp_mst_get_port_malloc(port);
752 connector = &intel_connector->base;
753 ret = drm_connector_init(dev, connector, &intel_dp_mst_connector_funcs,
754 DRM_MODE_CONNECTOR_DisplayPort);
756 intel_connector_free(intel_connector);
760 drm_connector_helper_add(connector, &intel_dp_mst_connector_helper_funcs);
762 for_each_pipe(dev_priv, pipe) {
763 struct drm_encoder *enc =
764 &intel_dp->mst_encoders[pipe]->base.base;
766 ret = drm_connector_attach_encoder(&intel_connector->base, enc);
771 drm_object_attach_property(&connector->base, dev->mode_config.path_property, 0);
772 drm_object_attach_property(&connector->base, dev->mode_config.tile_property, 0);
774 ret = drm_connector_set_path_property(connector, pathprop);
778 intel_attach_force_audio_property(connector);
779 intel_attach_broadcast_rgb_property(connector);
782 * Reuse the prop from the SST connector because we're
783 * not allowed to create new props after device registration.
785 connector->max_bpc_property =
786 intel_dp->attached_connector->base.max_bpc_property;
787 if (connector->max_bpc_property)
788 drm_connector_attach_max_bpc_property(connector, 6, 12);
793 drm_connector_cleanup(connector);
798 intel_dp_mst_poll_hpd_irq(struct drm_dp_mst_topology_mgr *mgr)
800 struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr);
802 intel_hpd_trigger_irq(dp_to_dig_port(intel_dp));
805 static const struct drm_dp_mst_topology_cbs mst_cbs = {
806 .add_connector = intel_dp_add_mst_connector,
807 .poll_hpd_irq = intel_dp_mst_poll_hpd_irq,
810 static struct intel_dp_mst_encoder *
811 intel_dp_create_fake_mst_encoder(struct intel_digital_port *intel_dig_port, enum pipe pipe)
813 struct intel_dp_mst_encoder *intel_mst;
814 struct intel_encoder *intel_encoder;
815 struct drm_device *dev = intel_dig_port->base.base.dev;
817 intel_mst = kzalloc(sizeof(*intel_mst), GFP_KERNEL);
822 intel_mst->pipe = pipe;
823 intel_encoder = &intel_mst->base;
824 intel_mst->primary = intel_dig_port;
826 drm_encoder_init(dev, &intel_encoder->base, &intel_dp_mst_enc_funcs,
827 DRM_MODE_ENCODER_DPMST, "DP-MST %c", pipe_name(pipe));
829 intel_encoder->type = INTEL_OUTPUT_DP_MST;
830 intel_encoder->power_domain = intel_dig_port->base.power_domain;
831 intel_encoder->port = intel_dig_port->base.port;
832 intel_encoder->cloneable = 0;
834 * This is wrong, but broken userspace uses the intersection
835 * of possible_crtcs of all the encoders of a given connector
836 * to figure out which crtcs can drive said connector. What
837 * should be used instead is the union of possible_crtcs.
838 * To keep such userspace functioning we must misconfigure
839 * this to make sure the intersection is not empty :(
841 intel_encoder->pipe_mask = ~0;
843 intel_encoder->compute_config = intel_dp_mst_compute_config;
844 intel_encoder->compute_config_late = intel_dp_mst_compute_config_late;
845 intel_encoder->disable = intel_mst_disable_dp;
846 intel_encoder->post_disable = intel_mst_post_disable_dp;
847 intel_encoder->pre_pll_enable = intel_mst_pre_pll_enable_dp;
848 intel_encoder->pre_enable = intel_mst_pre_enable_dp;
849 intel_encoder->enable = intel_mst_enable_dp;
850 intel_encoder->get_hw_state = intel_dp_mst_enc_get_hw_state;
851 intel_encoder->get_config = intel_dp_mst_enc_get_config;
858 intel_dp_create_fake_mst_encoders(struct intel_digital_port *intel_dig_port)
860 struct intel_dp *intel_dp = &intel_dig_port->dp;
861 struct drm_i915_private *dev_priv = to_i915(intel_dig_port->base.base.dev);
864 for_each_pipe(dev_priv, pipe)
865 intel_dp->mst_encoders[pipe] = intel_dp_create_fake_mst_encoder(intel_dig_port, pipe);
870 intel_dp_mst_encoder_active_links(struct intel_digital_port *intel_dig_port)
872 return intel_dig_port->dp.active_mst_links;
876 intel_dp_mst_encoder_init(struct intel_digital_port *intel_dig_port, int conn_base_id)
878 struct drm_i915_private *i915 = to_i915(intel_dig_port->base.base.dev);
879 struct intel_dp *intel_dp = &intel_dig_port->dp;
880 enum port port = intel_dig_port->base.port;
883 if (!HAS_DP_MST(i915) || intel_dp_is_edp(intel_dp))
886 if (INTEL_GEN(i915) < 12 && port == PORT_A)
889 if (INTEL_GEN(i915) < 11 && port == PORT_E)
892 intel_dp->mst_mgr.cbs = &mst_cbs;
894 /* create encoders */
895 intel_dp_create_fake_mst_encoders(intel_dig_port);
896 ret = drm_dp_mst_topology_mgr_init(&intel_dp->mst_mgr, &i915->drm,
897 &intel_dp->aux, 16, 3, conn_base_id);
901 intel_dp->can_mst = true;
907 intel_dp_mst_encoder_cleanup(struct intel_digital_port *intel_dig_port)
909 struct intel_dp *intel_dp = &intel_dig_port->dp;
911 if (!intel_dp->can_mst)
914 drm_dp_mst_topology_mgr_destroy(&intel_dp->mst_mgr);
915 /* encoders will get killed by normal cleanup */
918 bool intel_dp_mst_is_master_trans(const struct intel_crtc_state *crtc_state)
920 return crtc_state->mst_master_transcoder == crtc_state->cpu_transcoder;
923 bool intel_dp_mst_is_slave_trans(const struct intel_crtc_state *crtc_state)
925 return crtc_state->mst_master_transcoder != INVALID_TRANSCODER &&
926 crtc_state->mst_master_transcoder != crtc_state->cpu_transcoder;