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.h>
27 #include <drm/drm_atomic_helper.h>
28 #include <drm/drm_edid.h>
29 #include <drm/drm_probe_helper.h>
32 #include "intel_atomic.h"
33 #include "intel_audio.h"
34 #include "intel_connector.h"
35 #include "intel_crtc.h"
36 #include "intel_ddi.h"
38 #include "intel_display_types.h"
40 #include "intel_dp_hdcp.h"
41 #include "intel_dp_mst.h"
42 #include "intel_dpio_phy.h"
43 #include "intel_hdcp.h"
44 #include "intel_hotplug.h"
45 #include "skl_scaler.h"
47 static int intel_dp_mst_compute_link_config(struct intel_encoder *encoder,
48 struct intel_crtc_state *crtc_state,
49 struct drm_connector_state *conn_state,
50 struct link_config_limits *limits)
52 struct drm_atomic_state *state = crtc_state->uapi.state;
53 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
54 struct intel_dp *intel_dp = &intel_mst->primary->dp;
55 struct intel_connector *connector =
56 to_intel_connector(conn_state->connector);
57 struct drm_i915_private *i915 = to_i915(connector->base.dev);
58 const struct drm_display_mode *adjusted_mode =
59 &crtc_state->hw.adjusted_mode;
60 bool constant_n = drm_dp_has_quirk(&intel_dp->desc, DP_DPCD_QUIRK_CONSTANT_N);
61 int bpp, slots = -EINVAL;
63 crtc_state->lane_count = limits->max_lane_count;
64 crtc_state->port_clock = limits->max_rate;
66 for (bpp = limits->max_bpp; bpp >= limits->min_bpp; bpp -= 2 * 3) {
67 crtc_state->pipe_bpp = bpp;
69 crtc_state->pbn = drm_dp_calc_pbn_mode(adjusted_mode->crtc_clock,
73 slots = drm_dp_atomic_find_vcpi_slots(state, &intel_dp->mst_mgr,
76 drm_dp_get_vc_payload_bw(&intel_dp->mst_mgr,
77 crtc_state->port_clock,
78 crtc_state->lane_count));
79 if (slots == -EDEADLK)
86 drm_dbg_kms(&i915->drm, "failed finding vcpi slots:%d\n",
91 intel_link_compute_m_n(crtc_state->pipe_bpp,
92 crtc_state->lane_count,
93 adjusted_mode->crtc_clock,
94 crtc_state->port_clock,
96 constant_n, crtc_state->fec_enable);
97 crtc_state->dp_m_n.tu = slots;
102 static int intel_dp_mst_compute_config(struct intel_encoder *encoder,
103 struct intel_crtc_state *pipe_config,
104 struct drm_connector_state *conn_state)
106 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
107 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
108 struct intel_dp *intel_dp = &intel_mst->primary->dp;
109 struct intel_connector *connector =
110 to_intel_connector(conn_state->connector);
111 struct intel_digital_connector_state *intel_conn_state =
112 to_intel_digital_connector_state(conn_state);
113 const struct drm_display_mode *adjusted_mode =
114 &pipe_config->hw.adjusted_mode;
115 struct link_config_limits limits;
118 if (adjusted_mode->flags & DRM_MODE_FLAG_DBLSCAN)
121 pipe_config->output_format = INTEL_OUTPUT_FORMAT_RGB;
122 pipe_config->has_pch_encoder = false;
124 if (intel_conn_state->force_audio == HDMI_AUDIO_AUTO)
125 pipe_config->has_audio = connector->port->has_audio;
127 pipe_config->has_audio =
128 intel_conn_state->force_audio == HDMI_AUDIO_ON;
131 * for MST we always configure max link bw - the spec doesn't
132 * seem to suggest we should do otherwise.
135 limits.max_rate = intel_dp_max_link_rate(intel_dp);
137 limits.min_lane_count =
138 limits.max_lane_count = intel_dp_max_lane_count(intel_dp);
140 limits.min_bpp = intel_dp_min_bpp(pipe_config->output_format);
142 * FIXME: If all the streams can't fit into the link with
143 * their current pipe_bpp we should reduce pipe_bpp across
144 * the board until things start to fit. Until then we
145 * limit to <= 8bpc since that's what was hardcoded for all
146 * MST streams previously. This hack should be removed once
147 * we have the proper retry logic in place.
149 limits.max_bpp = min(pipe_config->pipe_bpp, 24);
151 intel_dp_adjust_compliance_config(intel_dp, pipe_config, &limits);
153 ret = intel_dp_mst_compute_link_config(encoder, pipe_config,
154 conn_state, &limits);
158 pipe_config->limited_color_range =
159 intel_dp_limited_color_range(pipe_config, conn_state);
161 if (IS_GEMINILAKE(dev_priv) || IS_BROXTON(dev_priv))
162 pipe_config->lane_lat_optim_mask =
163 bxt_ddi_phy_calc_lane_lat_optim_mask(pipe_config->lane_count);
165 intel_ddi_compute_min_voltage_level(dev_priv, pipe_config);
171 * Iterate over all connectors and return a mask of
172 * all CPU transcoders streaming over the same DP link.
175 intel_dp_mst_transcoder_mask(struct intel_atomic_state *state,
176 struct intel_dp *mst_port)
178 struct drm_i915_private *dev_priv = to_i915(state->base.dev);
179 const struct intel_digital_connector_state *conn_state;
180 struct intel_connector *connector;
184 if (DISPLAY_VER(dev_priv) < 12)
187 for_each_new_intel_connector_in_state(state, connector, conn_state, i) {
188 const struct intel_crtc_state *crtc_state;
189 struct intel_crtc *crtc;
191 if (connector->mst_port != mst_port || !conn_state->base.crtc)
194 crtc = to_intel_crtc(conn_state->base.crtc);
195 crtc_state = intel_atomic_get_new_crtc_state(state, crtc);
197 if (!crtc_state->hw.active)
200 transcoders |= BIT(crtc_state->cpu_transcoder);
206 static int intel_dp_mst_compute_config_late(struct intel_encoder *encoder,
207 struct intel_crtc_state *crtc_state,
208 struct drm_connector_state *conn_state)
210 struct intel_atomic_state *state = to_intel_atomic_state(conn_state->state);
211 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
212 struct intel_dp *intel_dp = &intel_mst->primary->dp;
214 /* lowest numbered transcoder will be designated master */
215 crtc_state->mst_master_transcoder =
216 ffs(intel_dp_mst_transcoder_mask(state, intel_dp)) - 1;
222 * If one of the connectors in a MST stream needs a modeset, mark all CRTCs
223 * that shares the same MST stream as mode changed,
224 * intel_modeset_pipe_config()+intel_crtc_check_fastset() will take care to do
225 * a fastset when possible.
228 intel_dp_mst_atomic_master_trans_check(struct intel_connector *connector,
229 struct intel_atomic_state *state)
231 struct drm_i915_private *dev_priv = to_i915(state->base.dev);
232 struct drm_connector_list_iter connector_list_iter;
233 struct intel_connector *connector_iter;
235 if (DISPLAY_VER(dev_priv) < 12)
238 if (!intel_connector_needs_modeset(state, &connector->base))
241 drm_connector_list_iter_begin(&dev_priv->drm, &connector_list_iter);
242 for_each_intel_connector_iter(connector_iter, &connector_list_iter) {
243 struct intel_digital_connector_state *conn_iter_state;
244 struct intel_crtc_state *crtc_state;
245 struct intel_crtc *crtc;
248 if (connector_iter->mst_port != connector->mst_port ||
249 connector_iter == connector)
252 conn_iter_state = intel_atomic_get_digital_connector_state(state,
254 if (IS_ERR(conn_iter_state)) {
255 drm_connector_list_iter_end(&connector_list_iter);
256 return PTR_ERR(conn_iter_state);
259 if (!conn_iter_state->base.crtc)
262 crtc = to_intel_crtc(conn_iter_state->base.crtc);
263 crtc_state = intel_atomic_get_crtc_state(&state->base, crtc);
264 if (IS_ERR(crtc_state)) {
265 drm_connector_list_iter_end(&connector_list_iter);
266 return PTR_ERR(crtc_state);
269 ret = drm_atomic_add_affected_planes(&state->base, &crtc->base);
271 drm_connector_list_iter_end(&connector_list_iter);
274 crtc_state->uapi.mode_changed = true;
276 drm_connector_list_iter_end(&connector_list_iter);
282 intel_dp_mst_atomic_check(struct drm_connector *connector,
283 struct drm_atomic_state *_state)
285 struct intel_atomic_state *state = to_intel_atomic_state(_state);
286 struct drm_connector_state *new_conn_state =
287 drm_atomic_get_new_connector_state(&state->base, connector);
288 struct drm_connector_state *old_conn_state =
289 drm_atomic_get_old_connector_state(&state->base, connector);
290 struct intel_connector *intel_connector =
291 to_intel_connector(connector);
292 struct drm_crtc *new_crtc = new_conn_state->crtc;
293 struct drm_dp_mst_topology_mgr *mgr;
296 ret = intel_digital_connector_atomic_check(connector, &state->base);
300 ret = intel_dp_mst_atomic_master_trans_check(intel_connector, state);
304 if (!old_conn_state->crtc)
307 /* We only want to free VCPI if this state disables the CRTC on this
311 struct intel_crtc *crtc = to_intel_crtc(new_crtc);
312 struct intel_crtc_state *crtc_state =
313 intel_atomic_get_new_crtc_state(state, crtc);
316 !drm_atomic_crtc_needs_modeset(&crtc_state->uapi) ||
317 crtc_state->uapi.enable)
321 mgr = &enc_to_mst(to_intel_encoder(old_conn_state->best_encoder))->primary->dp.mst_mgr;
322 ret = drm_dp_atomic_release_vcpi_slots(&state->base, mgr,
323 intel_connector->port);
328 static void clear_act_sent(struct intel_encoder *encoder,
329 const struct intel_crtc_state *crtc_state)
331 struct drm_i915_private *i915 = to_i915(encoder->base.dev);
333 intel_de_write(i915, dp_tp_status_reg(encoder, crtc_state),
334 DP_TP_STATUS_ACT_SENT);
337 static void wait_for_act_sent(struct intel_encoder *encoder,
338 const struct intel_crtc_state *crtc_state)
340 struct drm_i915_private *i915 = to_i915(encoder->base.dev);
341 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
342 struct intel_dp *intel_dp = &intel_mst->primary->dp;
344 if (intel_de_wait_for_set(i915, dp_tp_status_reg(encoder, crtc_state),
345 DP_TP_STATUS_ACT_SENT, 1))
346 drm_err(&i915->drm, "Timed out waiting for ACT sent\n");
348 drm_dp_check_act_status(&intel_dp->mst_mgr);
351 static void intel_mst_pre_disable_dp(struct intel_atomic_state *state,
352 struct intel_encoder *encoder,
353 const struct intel_crtc_state *old_crtc_state,
354 const struct drm_connector_state *old_conn_state)
356 if (old_crtc_state->has_audio)
357 intel_audio_codec_disable(encoder, old_crtc_state,
361 static void intel_mst_disable_dp(struct intel_atomic_state *state,
362 struct intel_encoder *encoder,
363 const struct intel_crtc_state *old_crtc_state,
364 const struct drm_connector_state *old_conn_state)
366 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
367 struct intel_digital_port *dig_port = intel_mst->primary;
368 struct intel_dp *intel_dp = &dig_port->dp;
369 struct intel_connector *connector =
370 to_intel_connector(old_conn_state->connector);
371 struct drm_i915_private *i915 = to_i915(connector->base.dev);
374 drm_dbg_kms(&i915->drm, "active links %d\n",
375 intel_dp->active_mst_links);
377 intel_hdcp_disable(intel_mst->connector);
379 drm_dp_mst_reset_vcpi_slots(&intel_dp->mst_mgr, connector->port);
381 ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr, 1);
383 drm_dbg_kms(&i915->drm, "failed to update payload %d\n", ret);
387 static void intel_mst_post_disable_dp(struct intel_atomic_state *state,
388 struct intel_encoder *encoder,
389 const struct intel_crtc_state *old_crtc_state,
390 const struct drm_connector_state *old_conn_state)
392 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
393 struct intel_digital_port *dig_port = intel_mst->primary;
394 struct intel_dp *intel_dp = &dig_port->dp;
395 struct intel_connector *connector =
396 to_intel_connector(old_conn_state->connector);
397 struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
398 bool last_mst_stream;
400 intel_dp->active_mst_links--;
401 last_mst_stream = intel_dp->active_mst_links == 0;
402 drm_WARN_ON(&dev_priv->drm,
403 DISPLAY_VER(dev_priv) >= 12 && last_mst_stream &&
404 !intel_dp_mst_is_master_trans(old_crtc_state));
406 intel_crtc_vblank_off(old_crtc_state);
408 intel_disable_transcoder(old_crtc_state);
410 drm_dp_update_payload_part2(&intel_dp->mst_mgr);
412 clear_act_sent(encoder, old_crtc_state);
414 intel_de_rmw(dev_priv, TRANS_DDI_FUNC_CTL(old_crtc_state->cpu_transcoder),
415 TRANS_DDI_DP_VC_PAYLOAD_ALLOC, 0);
417 wait_for_act_sent(encoder, old_crtc_state);
419 drm_dp_mst_deallocate_vcpi(&intel_dp->mst_mgr, connector->port);
421 intel_ddi_disable_transcoder_func(old_crtc_state);
423 if (DISPLAY_VER(dev_priv) >= 9)
424 skl_scaler_disable(old_crtc_state);
426 ilk_pfit_disable(old_crtc_state);
429 * Power down mst path before disabling the port, otherwise we end
430 * up getting interrupts from the sink upon detecting link loss.
432 drm_dp_send_power_updown_phy(&intel_dp->mst_mgr, connector->port,
436 * BSpec 4287: disable DIP after the transcoder is disabled and before
437 * the transcoder clock select is set to none.
440 intel_dp_set_infoframes(&dig_port->base, false,
441 old_crtc_state, NULL);
443 * From TGL spec: "If multi-stream slave transcoder: Configure
444 * Transcoder Clock Select to direct no clock to the transcoder"
446 * From older GENs spec: "Configure Transcoder Clock Select to direct
447 * no clock to the transcoder"
449 if (DISPLAY_VER(dev_priv) < 12 || !last_mst_stream)
450 intel_ddi_disable_pipe_clock(old_crtc_state);
453 intel_mst->connector = NULL;
455 dig_port->base.post_disable(state, &dig_port->base,
456 old_crtc_state, NULL);
458 drm_dbg_kms(&dev_priv->drm, "active links %d\n",
459 intel_dp->active_mst_links);
462 static void intel_mst_pre_pll_enable_dp(struct intel_atomic_state *state,
463 struct intel_encoder *encoder,
464 const struct intel_crtc_state *pipe_config,
465 const struct drm_connector_state *conn_state)
467 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
468 struct intel_digital_port *dig_port = intel_mst->primary;
469 struct intel_dp *intel_dp = &dig_port->dp;
471 if (intel_dp->active_mst_links == 0)
472 dig_port->base.pre_pll_enable(state, &dig_port->base,
476 static void intel_mst_pre_enable_dp(struct intel_atomic_state *state,
477 struct intel_encoder *encoder,
478 const struct intel_crtc_state *pipe_config,
479 const struct drm_connector_state *conn_state)
481 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
482 struct intel_digital_port *dig_port = intel_mst->primary;
483 struct intel_dp *intel_dp = &dig_port->dp;
484 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
485 struct intel_connector *connector =
486 to_intel_connector(conn_state->connector);
488 bool first_mst_stream;
490 /* MST encoders are bound to a crtc, not to a connector,
491 * force the mapping here for get_hw_state.
493 connector->encoder = encoder;
494 intel_mst->connector = connector;
495 first_mst_stream = intel_dp->active_mst_links == 0;
496 drm_WARN_ON(&dev_priv->drm,
497 DISPLAY_VER(dev_priv) >= 12 && first_mst_stream &&
498 !intel_dp_mst_is_master_trans(pipe_config));
500 drm_dbg_kms(&dev_priv->drm, "active links %d\n",
501 intel_dp->active_mst_links);
503 if (first_mst_stream)
504 intel_dp_set_power(intel_dp, DP_SET_POWER_D0);
506 drm_dp_send_power_updown_phy(&intel_dp->mst_mgr, connector->port, true);
508 if (first_mst_stream)
509 dig_port->base.pre_enable(state, &dig_port->base,
512 ret = drm_dp_mst_allocate_vcpi(&intel_dp->mst_mgr,
515 pipe_config->dp_m_n.tu);
517 drm_err(&dev_priv->drm, "failed to allocate vcpi\n");
519 intel_dp->active_mst_links++;
521 ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr, 1);
524 * Before Gen 12 this is not done as part of
525 * dig_port->base.pre_enable() and should be done here. For
526 * Gen 12+ the step in which this should be done is different for the
527 * first MST stream, so it's done on the DDI for the first stream and
528 * here for the following ones.
530 if (DISPLAY_VER(dev_priv) < 12 || !first_mst_stream)
531 intel_ddi_enable_pipe_clock(encoder, pipe_config);
533 intel_ddi_set_dp_msa(pipe_config, conn_state);
535 intel_dp_set_m_n(pipe_config, M1_N1);
538 static void intel_mst_enable_dp(struct intel_atomic_state *state,
539 struct intel_encoder *encoder,
540 const struct intel_crtc_state *pipe_config,
541 const struct drm_connector_state *conn_state)
543 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
544 struct intel_digital_port *dig_port = intel_mst->primary;
545 struct intel_dp *intel_dp = &dig_port->dp;
546 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
547 enum transcoder trans = pipe_config->cpu_transcoder;
549 drm_WARN_ON(&dev_priv->drm, pipe_config->has_pch_encoder);
551 clear_act_sent(encoder, pipe_config);
553 if (intel_dp_is_uhbr(pipe_config)) {
554 const struct drm_display_mode *adjusted_mode =
555 &pipe_config->hw.adjusted_mode;
556 u64 crtc_clock_hz = KHz(adjusted_mode->crtc_clock);
558 intel_de_write(dev_priv, TRANS_DP2_VFREQHIGH(pipe_config->cpu_transcoder),
559 TRANS_DP2_VFREQ_PIXEL_CLOCK(crtc_clock_hz >> 24));
560 intel_de_write(dev_priv, TRANS_DP2_VFREQLOW(pipe_config->cpu_transcoder),
561 TRANS_DP2_VFREQ_PIXEL_CLOCK(crtc_clock_hz & 0xffffff));
564 intel_ddi_enable_transcoder_func(encoder, pipe_config);
566 intel_de_rmw(dev_priv, TRANS_DDI_FUNC_CTL(trans), 0,
567 TRANS_DDI_DP_VC_PAYLOAD_ALLOC);
569 drm_dbg_kms(&dev_priv->drm, "active links %d\n",
570 intel_dp->active_mst_links);
572 wait_for_act_sent(encoder, pipe_config);
574 drm_dp_update_payload_part2(&intel_dp->mst_mgr);
576 if (DISPLAY_VER(dev_priv) >= 12 && pipe_config->fec_enable)
577 intel_de_rmw(dev_priv, CHICKEN_TRANS(trans), 0,
578 FECSTALL_DIS_DPTSTREAM_DPTTG);
580 intel_enable_transcoder(pipe_config);
582 intel_crtc_vblank_on(pipe_config);
584 if (pipe_config->has_audio)
585 intel_audio_codec_enable(encoder, pipe_config, conn_state);
587 /* Enable hdcp if it's desired */
588 if (conn_state->content_protection ==
589 DRM_MODE_CONTENT_PROTECTION_DESIRED)
590 intel_hdcp_enable(to_intel_connector(conn_state->connector),
592 (u8)conn_state->hdcp_content_type);
595 static bool intel_dp_mst_enc_get_hw_state(struct intel_encoder *encoder,
598 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
599 *pipe = intel_mst->pipe;
600 if (intel_mst->connector)
605 static void intel_dp_mst_enc_get_config(struct intel_encoder *encoder,
606 struct intel_crtc_state *pipe_config)
608 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
609 struct intel_digital_port *dig_port = intel_mst->primary;
611 dig_port->base.get_config(&dig_port->base, pipe_config);
614 static bool intel_dp_mst_initial_fastset_check(struct intel_encoder *encoder,
615 struct intel_crtc_state *crtc_state)
617 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
618 struct intel_digital_port *dig_port = intel_mst->primary;
620 return intel_dp_initial_fastset_check(&dig_port->base, crtc_state);
623 static int intel_dp_mst_get_ddc_modes(struct drm_connector *connector)
625 struct intel_connector *intel_connector = to_intel_connector(connector);
626 struct intel_dp *intel_dp = intel_connector->mst_port;
630 if (drm_connector_is_unregistered(connector))
631 return intel_connector_update_modes(connector, NULL);
633 edid = drm_dp_mst_get_edid(connector, &intel_dp->mst_mgr, intel_connector->port);
634 ret = intel_connector_update_modes(connector, edid);
641 intel_dp_mst_connector_late_register(struct drm_connector *connector)
643 struct intel_connector *intel_connector = to_intel_connector(connector);
646 ret = drm_dp_mst_connector_late_register(connector,
647 intel_connector->port);
651 ret = intel_connector_register(connector);
653 drm_dp_mst_connector_early_unregister(connector,
654 intel_connector->port);
660 intel_dp_mst_connector_early_unregister(struct drm_connector *connector)
662 struct intel_connector *intel_connector = to_intel_connector(connector);
664 intel_connector_unregister(connector);
665 drm_dp_mst_connector_early_unregister(connector,
666 intel_connector->port);
669 static const struct drm_connector_funcs intel_dp_mst_connector_funcs = {
670 .fill_modes = drm_helper_probe_single_connector_modes,
671 .atomic_get_property = intel_digital_connector_atomic_get_property,
672 .atomic_set_property = intel_digital_connector_atomic_set_property,
673 .late_register = intel_dp_mst_connector_late_register,
674 .early_unregister = intel_dp_mst_connector_early_unregister,
675 .destroy = intel_connector_destroy,
676 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
677 .atomic_duplicate_state = intel_digital_connector_duplicate_state,
680 static int intel_dp_mst_get_modes(struct drm_connector *connector)
682 return intel_dp_mst_get_ddc_modes(connector);
686 intel_dp_mst_mode_valid_ctx(struct drm_connector *connector,
687 struct drm_display_mode *mode,
688 struct drm_modeset_acquire_ctx *ctx,
689 enum drm_mode_status *status)
691 struct drm_i915_private *dev_priv = to_i915(connector->dev);
692 struct intel_connector *intel_connector = to_intel_connector(connector);
693 struct intel_dp *intel_dp = intel_connector->mst_port;
694 struct drm_dp_mst_topology_mgr *mgr = &intel_dp->mst_mgr;
695 struct drm_dp_mst_port *port = intel_connector->port;
696 const int min_bpp = 18;
697 int max_dotclk = to_i915(connector->dev)->max_dotclk_freq;
698 int max_rate, mode_rate, max_lanes, max_link_clock;
701 if (drm_connector_is_unregistered(connector)) {
702 *status = MODE_ERROR;
706 if (mode->flags & DRM_MODE_FLAG_DBLSCAN) {
707 *status = MODE_NO_DBLESCAN;
711 max_link_clock = intel_dp_max_link_rate(intel_dp);
712 max_lanes = intel_dp_max_lane_count(intel_dp);
714 max_rate = intel_dp_max_data_rate(max_link_clock, max_lanes);
715 mode_rate = intel_dp_link_required(mode->clock, min_bpp);
717 ret = drm_modeset_lock(&mgr->base.lock, ctx);
721 if (mode_rate > max_rate || mode->clock > max_dotclk ||
722 drm_dp_calc_pbn_mode(mode->clock, min_bpp, false) > port->full_pbn) {
723 *status = MODE_CLOCK_HIGH;
727 if (mode->clock < 10000) {
728 *status = MODE_CLOCK_LOW;
732 if (mode->flags & DRM_MODE_FLAG_DBLCLK) {
733 *status = MODE_H_ILLEGAL;
737 *status = intel_mode_valid_max_plane_size(dev_priv, mode, false);
741 static struct drm_encoder *intel_mst_atomic_best_encoder(struct drm_connector *connector,
742 struct drm_atomic_state *state)
744 struct drm_connector_state *connector_state = drm_atomic_get_new_connector_state(state,
746 struct intel_connector *intel_connector = to_intel_connector(connector);
747 struct intel_dp *intel_dp = intel_connector->mst_port;
748 struct intel_crtc *crtc = to_intel_crtc(connector_state->crtc);
750 return &intel_dp->mst_encoders[crtc->pipe]->base.base;
754 intel_dp_mst_detect(struct drm_connector *connector,
755 struct drm_modeset_acquire_ctx *ctx, bool force)
757 struct drm_i915_private *i915 = to_i915(connector->dev);
758 struct intel_connector *intel_connector = to_intel_connector(connector);
759 struct intel_dp *intel_dp = intel_connector->mst_port;
761 if (!INTEL_DISPLAY_ENABLED(i915))
762 return connector_status_disconnected;
764 if (drm_connector_is_unregistered(connector))
765 return connector_status_disconnected;
767 return drm_dp_mst_detect_port(connector, ctx, &intel_dp->mst_mgr,
768 intel_connector->port);
771 static const struct drm_connector_helper_funcs intel_dp_mst_connector_helper_funcs = {
772 .get_modes = intel_dp_mst_get_modes,
773 .mode_valid_ctx = intel_dp_mst_mode_valid_ctx,
774 .atomic_best_encoder = intel_mst_atomic_best_encoder,
775 .atomic_check = intel_dp_mst_atomic_check,
776 .detect_ctx = intel_dp_mst_detect,
779 static void intel_dp_mst_encoder_destroy(struct drm_encoder *encoder)
781 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(to_intel_encoder(encoder));
783 drm_encoder_cleanup(encoder);
787 static const struct drm_encoder_funcs intel_dp_mst_enc_funcs = {
788 .destroy = intel_dp_mst_encoder_destroy,
791 static bool intel_dp_mst_get_hw_state(struct intel_connector *connector)
793 if (intel_attached_encoder(connector) && connector->base.state->crtc) {
795 if (!intel_attached_encoder(connector)->get_hw_state(intel_attached_encoder(connector), &pipe))
802 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)
804 struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr);
805 struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
806 struct drm_device *dev = dig_port->base.base.dev;
807 struct drm_i915_private *dev_priv = to_i915(dev);
808 struct intel_connector *intel_connector;
809 struct drm_connector *connector;
813 intel_connector = intel_connector_alloc();
814 if (!intel_connector)
817 intel_connector->get_hw_state = intel_dp_mst_get_hw_state;
818 intel_connector->mst_port = intel_dp;
819 intel_connector->port = port;
820 drm_dp_mst_get_port_malloc(port);
822 connector = &intel_connector->base;
823 ret = drm_connector_init(dev, connector, &intel_dp_mst_connector_funcs,
824 DRM_MODE_CONNECTOR_DisplayPort);
826 intel_connector_free(intel_connector);
830 drm_connector_helper_add(connector, &intel_dp_mst_connector_helper_funcs);
832 for_each_pipe(dev_priv, pipe) {
833 struct drm_encoder *enc =
834 &intel_dp->mst_encoders[pipe]->base.base;
836 ret = drm_connector_attach_encoder(&intel_connector->base, enc);
841 drm_object_attach_property(&connector->base, dev->mode_config.path_property, 0);
842 drm_object_attach_property(&connector->base, dev->mode_config.tile_property, 0);
844 ret = drm_connector_set_path_property(connector, pathprop);
848 intel_attach_force_audio_property(connector);
849 intel_attach_broadcast_rgb_property(connector);
851 ret = intel_dp_hdcp_init(dig_port, intel_connector);
853 drm_dbg_kms(&dev_priv->drm, "[%s:%d] HDCP MST init failed, skipping.\n",
854 connector->name, connector->base.id);
856 * Reuse the prop from the SST connector because we're
857 * not allowed to create new props after device registration.
859 connector->max_bpc_property =
860 intel_dp->attached_connector->base.max_bpc_property;
861 if (connector->max_bpc_property)
862 drm_connector_attach_max_bpc_property(connector, 6, 12);
867 drm_connector_cleanup(connector);
872 intel_dp_mst_poll_hpd_irq(struct drm_dp_mst_topology_mgr *mgr)
874 struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr);
876 intel_hpd_trigger_irq(dp_to_dig_port(intel_dp));
879 static const struct drm_dp_mst_topology_cbs mst_cbs = {
880 .add_connector = intel_dp_add_mst_connector,
881 .poll_hpd_irq = intel_dp_mst_poll_hpd_irq,
884 static struct intel_dp_mst_encoder *
885 intel_dp_create_fake_mst_encoder(struct intel_digital_port *dig_port, enum pipe pipe)
887 struct intel_dp_mst_encoder *intel_mst;
888 struct intel_encoder *intel_encoder;
889 struct drm_device *dev = dig_port->base.base.dev;
891 intel_mst = kzalloc(sizeof(*intel_mst), GFP_KERNEL);
896 intel_mst->pipe = pipe;
897 intel_encoder = &intel_mst->base;
898 intel_mst->primary = dig_port;
900 drm_encoder_init(dev, &intel_encoder->base, &intel_dp_mst_enc_funcs,
901 DRM_MODE_ENCODER_DPMST, "DP-MST %c", pipe_name(pipe));
903 intel_encoder->type = INTEL_OUTPUT_DP_MST;
904 intel_encoder->power_domain = dig_port->base.power_domain;
905 intel_encoder->port = dig_port->base.port;
906 intel_encoder->cloneable = 0;
908 * This is wrong, but broken userspace uses the intersection
909 * of possible_crtcs of all the encoders of a given connector
910 * to figure out which crtcs can drive said connector. What
911 * should be used instead is the union of possible_crtcs.
912 * To keep such userspace functioning we must misconfigure
913 * this to make sure the intersection is not empty :(
915 intel_encoder->pipe_mask = ~0;
917 intel_encoder->compute_config = intel_dp_mst_compute_config;
918 intel_encoder->compute_config_late = intel_dp_mst_compute_config_late;
919 intel_encoder->pre_disable = intel_mst_pre_disable_dp;
920 intel_encoder->disable = intel_mst_disable_dp;
921 intel_encoder->post_disable = intel_mst_post_disable_dp;
922 intel_encoder->update_pipe = intel_ddi_update_pipe;
923 intel_encoder->pre_pll_enable = intel_mst_pre_pll_enable_dp;
924 intel_encoder->pre_enable = intel_mst_pre_enable_dp;
925 intel_encoder->enable = intel_mst_enable_dp;
926 intel_encoder->get_hw_state = intel_dp_mst_enc_get_hw_state;
927 intel_encoder->get_config = intel_dp_mst_enc_get_config;
928 intel_encoder->initial_fastset_check = intel_dp_mst_initial_fastset_check;
935 intel_dp_create_fake_mst_encoders(struct intel_digital_port *dig_port)
937 struct intel_dp *intel_dp = &dig_port->dp;
938 struct drm_i915_private *dev_priv = to_i915(dig_port->base.base.dev);
941 for_each_pipe(dev_priv, pipe)
942 intel_dp->mst_encoders[pipe] = intel_dp_create_fake_mst_encoder(dig_port, pipe);
947 intel_dp_mst_encoder_active_links(struct intel_digital_port *dig_port)
949 return dig_port->dp.active_mst_links;
953 intel_dp_mst_encoder_init(struct intel_digital_port *dig_port, int conn_base_id)
955 struct drm_i915_private *i915 = to_i915(dig_port->base.base.dev);
956 struct intel_dp *intel_dp = &dig_port->dp;
957 enum port port = dig_port->base.port;
959 int max_source_rate =
960 intel_dp->source_rates[intel_dp->num_source_rates - 1];
962 if (!HAS_DP_MST(i915) || intel_dp_is_edp(intel_dp))
965 if (DISPLAY_VER(i915) < 12 && port == PORT_A)
968 if (DISPLAY_VER(i915) < 11 && port == PORT_E)
971 intel_dp->mst_mgr.cbs = &mst_cbs;
973 /* create encoders */
974 intel_dp_create_fake_mst_encoders(dig_port);
975 ret = drm_dp_mst_topology_mgr_init(&intel_dp->mst_mgr, &i915->drm,
976 &intel_dp->aux, 16, 3,
981 intel_dp->mst_mgr.cbs = NULL;
988 bool intel_dp_mst_source_support(struct intel_dp *intel_dp)
990 return intel_dp->mst_mgr.cbs;
994 intel_dp_mst_encoder_cleanup(struct intel_digital_port *dig_port)
996 struct intel_dp *intel_dp = &dig_port->dp;
998 if (!intel_dp_mst_source_support(intel_dp))
1001 drm_dp_mst_topology_mgr_destroy(&intel_dp->mst_mgr);
1002 /* encoders will get killed by normal cleanup */
1004 intel_dp->mst_mgr.cbs = NULL;
1007 bool intel_dp_mst_is_master_trans(const struct intel_crtc_state *crtc_state)
1009 return crtc_state->mst_master_transcoder == crtc_state->cpu_transcoder;
1012 bool intel_dp_mst_is_slave_trans(const struct intel_crtc_state *crtc_state)
1014 return crtc_state->mst_master_transcoder != INVALID_TRANSCODER &&
1015 crtc_state->mst_master_transcoder != crtc_state->cpu_transcoder;