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_ddi.h"
36 #include "intel_display_types.h"
37 #include "intel_hotplug.h"
39 #include "intel_dp_mst.h"
40 #include "intel_dpio_phy.h"
41 #include "intel_hdcp.h"
42 #include "skl_scaler.h"
44 static int intel_dp_mst_compute_link_config(struct intel_encoder *encoder,
45 struct intel_crtc_state *crtc_state,
46 struct drm_connector_state *conn_state,
47 struct link_config_limits *limits)
49 struct drm_atomic_state *state = crtc_state->uapi.state;
50 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
51 struct intel_dp *intel_dp = &intel_mst->primary->dp;
52 struct intel_connector *connector =
53 to_intel_connector(conn_state->connector);
54 struct drm_i915_private *i915 = to_i915(connector->base.dev);
55 const struct drm_display_mode *adjusted_mode =
56 &crtc_state->hw.adjusted_mode;
57 bool constant_n = drm_dp_has_quirk(&intel_dp->desc, DP_DPCD_QUIRK_CONSTANT_N);
58 int bpp, slots = -EINVAL;
60 crtc_state->lane_count = limits->max_lane_count;
61 crtc_state->port_clock = limits->max_clock;
63 for (bpp = limits->max_bpp; bpp >= limits->min_bpp; bpp -= 2 * 3) {
64 crtc_state->pipe_bpp = bpp;
66 crtc_state->pbn = drm_dp_calc_pbn_mode(adjusted_mode->crtc_clock,
70 slots = drm_dp_atomic_find_vcpi_slots(state, &intel_dp->mst_mgr,
73 drm_dp_get_vc_payload_bw(crtc_state->port_clock,
74 crtc_state->lane_count));
75 if (slots == -EDEADLK)
82 drm_dbg_kms(&i915->drm, "failed finding vcpi slots:%d\n",
87 intel_link_compute_m_n(crtc_state->pipe_bpp,
88 crtc_state->lane_count,
89 adjusted_mode->crtc_clock,
90 crtc_state->port_clock,
92 constant_n, crtc_state->fec_enable);
93 crtc_state->dp_m_n.tu = slots;
98 static int intel_dp_mst_compute_config(struct intel_encoder *encoder,
99 struct intel_crtc_state *pipe_config,
100 struct drm_connector_state *conn_state)
102 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
103 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
104 struct intel_dp *intel_dp = &intel_mst->primary->dp;
105 struct intel_connector *connector =
106 to_intel_connector(conn_state->connector);
107 struct intel_digital_connector_state *intel_conn_state =
108 to_intel_digital_connector_state(conn_state);
109 const struct drm_display_mode *adjusted_mode =
110 &pipe_config->hw.adjusted_mode;
111 struct link_config_limits limits;
114 if (adjusted_mode->flags & DRM_MODE_FLAG_DBLSCAN)
117 pipe_config->output_format = INTEL_OUTPUT_FORMAT_RGB;
118 pipe_config->has_pch_encoder = false;
120 if (intel_conn_state->force_audio == HDMI_AUDIO_AUTO)
121 pipe_config->has_audio = connector->port->has_audio;
123 pipe_config->has_audio =
124 intel_conn_state->force_audio == HDMI_AUDIO_ON;
127 * for MST we always configure max link bw - the spec doesn't
128 * seem to suggest we should do otherwise.
131 limits.max_clock = intel_dp_max_link_rate(intel_dp);
133 limits.min_lane_count =
134 limits.max_lane_count = intel_dp_max_lane_count(intel_dp);
136 limits.min_bpp = intel_dp_min_bpp(pipe_config->output_format);
138 * FIXME: If all the streams can't fit into the link with
139 * their current pipe_bpp we should reduce pipe_bpp across
140 * the board until things start to fit. Until then we
141 * limit to <= 8bpc since that's what was hardcoded for all
142 * MST streams previously. This hack should be removed once
143 * we have the proper retry logic in place.
145 limits.max_bpp = min(pipe_config->pipe_bpp, 24);
147 intel_dp_adjust_compliance_config(intel_dp, pipe_config, &limits);
149 ret = intel_dp_mst_compute_link_config(encoder, pipe_config,
150 conn_state, &limits);
154 pipe_config->limited_color_range =
155 intel_dp_limited_color_range(pipe_config, conn_state);
157 if (IS_GEN9_LP(dev_priv))
158 pipe_config->lane_lat_optim_mask =
159 bxt_ddi_phy_calc_lane_lat_optim_mask(pipe_config->lane_count);
161 intel_ddi_compute_min_voltage_level(dev_priv, pipe_config);
167 * Iterate over all connectors and return a mask of
168 * all CPU transcoders streaming over the same DP link.
171 intel_dp_mst_transcoder_mask(struct intel_atomic_state *state,
172 struct intel_dp *mst_port)
174 struct drm_i915_private *dev_priv = to_i915(state->base.dev);
175 const struct intel_digital_connector_state *conn_state;
176 struct intel_connector *connector;
180 if (DISPLAY_VER(dev_priv) < 12)
183 for_each_new_intel_connector_in_state(state, connector, conn_state, i) {
184 const struct intel_crtc_state *crtc_state;
185 struct intel_crtc *crtc;
187 if (connector->mst_port != mst_port || !conn_state->base.crtc)
190 crtc = to_intel_crtc(conn_state->base.crtc);
191 crtc_state = intel_atomic_get_new_crtc_state(state, crtc);
193 if (!crtc_state->hw.active)
196 transcoders |= BIT(crtc_state->cpu_transcoder);
202 static int intel_dp_mst_compute_config_late(struct intel_encoder *encoder,
203 struct intel_crtc_state *crtc_state,
204 struct drm_connector_state *conn_state)
206 struct intel_atomic_state *state = to_intel_atomic_state(conn_state->state);
207 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
208 struct intel_dp *intel_dp = &intel_mst->primary->dp;
210 /* lowest numbered transcoder will be designated master */
211 crtc_state->mst_master_transcoder =
212 ffs(intel_dp_mst_transcoder_mask(state, intel_dp)) - 1;
218 * If one of the connectors in a MST stream needs a modeset, mark all CRTCs
219 * that shares the same MST stream as mode changed,
220 * intel_modeset_pipe_config()+intel_crtc_check_fastset() will take care to do
221 * a fastset when possible.
224 intel_dp_mst_atomic_master_trans_check(struct intel_connector *connector,
225 struct intel_atomic_state *state)
227 struct drm_i915_private *dev_priv = to_i915(state->base.dev);
228 struct drm_connector_list_iter connector_list_iter;
229 struct intel_connector *connector_iter;
231 if (DISPLAY_VER(dev_priv) < 12)
234 if (!intel_connector_needs_modeset(state, &connector->base))
237 drm_connector_list_iter_begin(&dev_priv->drm, &connector_list_iter);
238 for_each_intel_connector_iter(connector_iter, &connector_list_iter) {
239 struct intel_digital_connector_state *conn_iter_state;
240 struct intel_crtc_state *crtc_state;
241 struct intel_crtc *crtc;
244 if (connector_iter->mst_port != connector->mst_port ||
245 connector_iter == connector)
248 conn_iter_state = intel_atomic_get_digital_connector_state(state,
250 if (IS_ERR(conn_iter_state)) {
251 drm_connector_list_iter_end(&connector_list_iter);
252 return PTR_ERR(conn_iter_state);
255 if (!conn_iter_state->base.crtc)
258 crtc = to_intel_crtc(conn_iter_state->base.crtc);
259 crtc_state = intel_atomic_get_crtc_state(&state->base, crtc);
260 if (IS_ERR(crtc_state)) {
261 drm_connector_list_iter_end(&connector_list_iter);
262 return PTR_ERR(crtc_state);
265 ret = drm_atomic_add_affected_planes(&state->base, &crtc->base);
267 drm_connector_list_iter_end(&connector_list_iter);
270 crtc_state->uapi.mode_changed = true;
272 drm_connector_list_iter_end(&connector_list_iter);
278 intel_dp_mst_atomic_check(struct drm_connector *connector,
279 struct drm_atomic_state *_state)
281 struct intel_atomic_state *state = to_intel_atomic_state(_state);
282 struct drm_connector_state *new_conn_state =
283 drm_atomic_get_new_connector_state(&state->base, connector);
284 struct drm_connector_state *old_conn_state =
285 drm_atomic_get_old_connector_state(&state->base, connector);
286 struct intel_connector *intel_connector =
287 to_intel_connector(connector);
288 struct drm_crtc *new_crtc = new_conn_state->crtc;
289 struct drm_dp_mst_topology_mgr *mgr;
292 ret = intel_digital_connector_atomic_check(connector, &state->base);
296 ret = intel_dp_mst_atomic_master_trans_check(intel_connector, state);
300 if (!old_conn_state->crtc)
303 /* We only want to free VCPI if this state disables the CRTC on this
307 struct intel_crtc *intel_crtc = to_intel_crtc(new_crtc);
308 struct intel_crtc_state *crtc_state =
309 intel_atomic_get_new_crtc_state(state, intel_crtc);
312 !drm_atomic_crtc_needs_modeset(&crtc_state->uapi) ||
313 crtc_state->uapi.enable)
317 mgr = &enc_to_mst(to_intel_encoder(old_conn_state->best_encoder))->primary->dp.mst_mgr;
318 ret = drm_dp_atomic_release_vcpi_slots(&state->base, mgr,
319 intel_connector->port);
324 static void clear_act_sent(struct intel_encoder *encoder,
325 const struct intel_crtc_state *crtc_state)
327 struct drm_i915_private *i915 = to_i915(encoder->base.dev);
329 intel_de_write(i915, dp_tp_status_reg(encoder, crtc_state),
330 DP_TP_STATUS_ACT_SENT);
333 static void wait_for_act_sent(struct intel_encoder *encoder,
334 const struct intel_crtc_state *crtc_state)
336 struct drm_i915_private *i915 = to_i915(encoder->base.dev);
337 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
338 struct intel_dp *intel_dp = &intel_mst->primary->dp;
340 if (intel_de_wait_for_set(i915, dp_tp_status_reg(encoder, crtc_state),
341 DP_TP_STATUS_ACT_SENT, 1))
342 drm_err(&i915->drm, "Timed out waiting for ACT sent\n");
344 drm_dp_check_act_status(&intel_dp->mst_mgr);
347 static void intel_mst_disable_dp(struct intel_atomic_state *state,
348 struct intel_encoder *encoder,
349 const struct intel_crtc_state *old_crtc_state,
350 const struct drm_connector_state *old_conn_state)
352 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
353 struct intel_digital_port *dig_port = intel_mst->primary;
354 struct intel_dp *intel_dp = &dig_port->dp;
355 struct intel_connector *connector =
356 to_intel_connector(old_conn_state->connector);
357 struct drm_i915_private *i915 = to_i915(connector->base.dev);
360 drm_dbg_kms(&i915->drm, "active links %d\n",
361 intel_dp->active_mst_links);
363 intel_hdcp_disable(intel_mst->connector);
365 drm_dp_mst_reset_vcpi_slots(&intel_dp->mst_mgr, connector->port);
367 ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
369 drm_dbg_kms(&i915->drm, "failed to update payload %d\n", ret);
371 if (old_crtc_state->has_audio)
372 intel_audio_codec_disable(encoder,
373 old_crtc_state, old_conn_state);
376 static void intel_mst_post_disable_dp(struct intel_atomic_state *state,
377 struct intel_encoder *encoder,
378 const struct intel_crtc_state *old_crtc_state,
379 const struct drm_connector_state *old_conn_state)
381 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
382 struct intel_digital_port *dig_port = intel_mst->primary;
383 struct intel_dp *intel_dp = &dig_port->dp;
384 struct intel_connector *connector =
385 to_intel_connector(old_conn_state->connector);
386 struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
387 bool last_mst_stream;
390 intel_dp->active_mst_links--;
391 last_mst_stream = intel_dp->active_mst_links == 0;
392 drm_WARN_ON(&dev_priv->drm,
393 DISPLAY_VER(dev_priv) >= 12 && last_mst_stream &&
394 !intel_dp_mst_is_master_trans(old_crtc_state));
396 intel_crtc_vblank_off(old_crtc_state);
398 intel_disable_pipe(old_crtc_state);
400 drm_dp_update_payload_part2(&intel_dp->mst_mgr);
402 clear_act_sent(encoder, old_crtc_state);
404 val = intel_de_read(dev_priv,
405 TRANS_DDI_FUNC_CTL(old_crtc_state->cpu_transcoder));
406 val &= ~TRANS_DDI_DP_VC_PAYLOAD_ALLOC;
407 intel_de_write(dev_priv,
408 TRANS_DDI_FUNC_CTL(old_crtc_state->cpu_transcoder),
411 wait_for_act_sent(encoder, old_crtc_state);
413 drm_dp_mst_deallocate_vcpi(&intel_dp->mst_mgr, connector->port);
415 intel_ddi_disable_transcoder_func(old_crtc_state);
417 if (DISPLAY_VER(dev_priv) >= 9)
418 skl_scaler_disable(old_crtc_state);
420 ilk_pfit_disable(old_crtc_state);
423 * Power down mst path before disabling the port, otherwise we end
424 * up getting interrupts from the sink upon detecting link loss.
426 drm_dp_send_power_updown_phy(&intel_dp->mst_mgr, connector->port,
430 * BSpec 4287: disable DIP after the transcoder is disabled and before
431 * the transcoder clock select is set to none.
434 intel_dp_set_infoframes(&dig_port->base, false,
435 old_crtc_state, NULL);
437 * From TGL spec: "If multi-stream slave transcoder: Configure
438 * Transcoder Clock Select to direct no clock to the transcoder"
440 * From older GENs spec: "Configure Transcoder Clock Select to direct
441 * no clock to the transcoder"
443 if (DISPLAY_VER(dev_priv) < 12 || !last_mst_stream)
444 intel_ddi_disable_pipe_clock(old_crtc_state);
447 intel_mst->connector = NULL;
449 dig_port->base.post_disable(state, &dig_port->base,
450 old_crtc_state, NULL);
452 drm_dbg_kms(&dev_priv->drm, "active links %d\n",
453 intel_dp->active_mst_links);
456 static void intel_mst_pre_pll_enable_dp(struct intel_atomic_state *state,
457 struct intel_encoder *encoder,
458 const struct intel_crtc_state *pipe_config,
459 const struct drm_connector_state *conn_state)
461 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
462 struct intel_digital_port *dig_port = intel_mst->primary;
463 struct intel_dp *intel_dp = &dig_port->dp;
465 if (intel_dp->active_mst_links == 0)
466 dig_port->base.pre_pll_enable(state, &dig_port->base,
470 static void intel_mst_pre_enable_dp(struct intel_atomic_state *state,
471 struct intel_encoder *encoder,
472 const struct intel_crtc_state *pipe_config,
473 const struct drm_connector_state *conn_state)
475 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
476 struct intel_digital_port *dig_port = intel_mst->primary;
477 struct intel_dp *intel_dp = &dig_port->dp;
478 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
479 struct intel_connector *connector =
480 to_intel_connector(conn_state->connector);
482 bool first_mst_stream;
484 /* MST encoders are bound to a crtc, not to a connector,
485 * force the mapping here for get_hw_state.
487 connector->encoder = encoder;
488 intel_mst->connector = connector;
489 first_mst_stream = intel_dp->active_mst_links == 0;
490 drm_WARN_ON(&dev_priv->drm,
491 DISPLAY_VER(dev_priv) >= 12 && first_mst_stream &&
492 !intel_dp_mst_is_master_trans(pipe_config));
494 drm_dbg_kms(&dev_priv->drm, "active links %d\n",
495 intel_dp->active_mst_links);
497 if (first_mst_stream)
498 intel_dp_set_power(intel_dp, DP_SET_POWER_D0);
500 drm_dp_send_power_updown_phy(&intel_dp->mst_mgr, connector->port, true);
502 if (first_mst_stream)
503 dig_port->base.pre_enable(state, &dig_port->base,
506 ret = drm_dp_mst_allocate_vcpi(&intel_dp->mst_mgr,
509 pipe_config->dp_m_n.tu);
511 drm_err(&dev_priv->drm, "failed to allocate vcpi\n");
513 intel_dp->active_mst_links++;
515 ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
518 * Before Gen 12 this is not done as part of
519 * dig_port->base.pre_enable() and should be done here. For
520 * Gen 12+ the step in which this should be done is different for the
521 * first MST stream, so it's done on the DDI for the first stream and
522 * here for the following ones.
524 if (DISPLAY_VER(dev_priv) < 12 || !first_mst_stream)
525 intel_ddi_enable_pipe_clock(encoder, pipe_config);
527 intel_ddi_set_dp_msa(pipe_config, conn_state);
529 intel_dp_set_m_n(pipe_config, M1_N1);
532 static void intel_mst_enable_dp(struct intel_atomic_state *state,
533 struct intel_encoder *encoder,
534 const struct intel_crtc_state *pipe_config,
535 const struct drm_connector_state *conn_state)
537 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
538 struct intel_digital_port *dig_port = intel_mst->primary;
539 struct intel_dp *intel_dp = &dig_port->dp;
540 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
543 drm_WARN_ON(&dev_priv->drm, pipe_config->has_pch_encoder);
545 clear_act_sent(encoder, pipe_config);
547 intel_ddi_enable_transcoder_func(encoder, pipe_config);
549 val = intel_de_read(dev_priv,
550 TRANS_DDI_FUNC_CTL(pipe_config->cpu_transcoder));
551 val |= TRANS_DDI_DP_VC_PAYLOAD_ALLOC;
552 intel_de_write(dev_priv,
553 TRANS_DDI_FUNC_CTL(pipe_config->cpu_transcoder),
556 drm_dbg_kms(&dev_priv->drm, "active links %d\n",
557 intel_dp->active_mst_links);
559 wait_for_act_sent(encoder, pipe_config);
561 drm_dp_update_payload_part2(&intel_dp->mst_mgr);
563 intel_enable_pipe(pipe_config);
565 intel_crtc_vblank_on(pipe_config);
567 if (pipe_config->has_audio)
568 intel_audio_codec_enable(encoder, pipe_config, conn_state);
570 /* Enable hdcp if it's desired */
571 if (conn_state->content_protection ==
572 DRM_MODE_CONTENT_PROTECTION_DESIRED)
573 intel_hdcp_enable(to_intel_connector(conn_state->connector),
575 (u8)conn_state->hdcp_content_type);
578 static bool intel_dp_mst_enc_get_hw_state(struct intel_encoder *encoder,
581 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
582 *pipe = intel_mst->pipe;
583 if (intel_mst->connector)
588 static void intel_dp_mst_enc_get_config(struct intel_encoder *encoder,
589 struct intel_crtc_state *pipe_config)
591 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
592 struct intel_digital_port *dig_port = intel_mst->primary;
594 dig_port->base.get_config(&dig_port->base, pipe_config);
597 static bool intel_dp_mst_initial_fastset_check(struct intel_encoder *encoder,
598 struct intel_crtc_state *crtc_state)
600 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
601 struct intel_digital_port *dig_port = intel_mst->primary;
603 return intel_dp_initial_fastset_check(&dig_port->base, crtc_state);
606 static int intel_dp_mst_get_ddc_modes(struct drm_connector *connector)
608 struct intel_connector *intel_connector = to_intel_connector(connector);
609 struct intel_dp *intel_dp = intel_connector->mst_port;
613 if (drm_connector_is_unregistered(connector))
614 return intel_connector_update_modes(connector, NULL);
616 edid = drm_dp_mst_get_edid(connector, &intel_dp->mst_mgr, intel_connector->port);
617 ret = intel_connector_update_modes(connector, edid);
624 intel_dp_mst_connector_late_register(struct drm_connector *connector)
626 struct intel_connector *intel_connector = to_intel_connector(connector);
629 ret = drm_dp_mst_connector_late_register(connector,
630 intel_connector->port);
634 ret = intel_connector_register(connector);
636 drm_dp_mst_connector_early_unregister(connector,
637 intel_connector->port);
643 intel_dp_mst_connector_early_unregister(struct drm_connector *connector)
645 struct intel_connector *intel_connector = to_intel_connector(connector);
647 intel_connector_unregister(connector);
648 drm_dp_mst_connector_early_unregister(connector,
649 intel_connector->port);
652 static const struct drm_connector_funcs intel_dp_mst_connector_funcs = {
653 .fill_modes = drm_helper_probe_single_connector_modes,
654 .atomic_get_property = intel_digital_connector_atomic_get_property,
655 .atomic_set_property = intel_digital_connector_atomic_set_property,
656 .late_register = intel_dp_mst_connector_late_register,
657 .early_unregister = intel_dp_mst_connector_early_unregister,
658 .destroy = intel_connector_destroy,
659 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
660 .atomic_duplicate_state = intel_digital_connector_duplicate_state,
663 static int intel_dp_mst_get_modes(struct drm_connector *connector)
665 return intel_dp_mst_get_ddc_modes(connector);
669 intel_dp_mst_mode_valid_ctx(struct drm_connector *connector,
670 struct drm_display_mode *mode,
671 struct drm_modeset_acquire_ctx *ctx,
672 enum drm_mode_status *status)
674 struct drm_i915_private *dev_priv = to_i915(connector->dev);
675 struct intel_connector *intel_connector = to_intel_connector(connector);
676 struct intel_dp *intel_dp = intel_connector->mst_port;
677 struct drm_dp_mst_topology_mgr *mgr = &intel_dp->mst_mgr;
678 struct drm_dp_mst_port *port = intel_connector->port;
679 const int min_bpp = 18;
680 int max_dotclk = to_i915(connector->dev)->max_dotclk_freq;
681 int max_rate, mode_rate, max_lanes, max_link_clock;
684 if (drm_connector_is_unregistered(connector)) {
685 *status = MODE_ERROR;
689 if (mode->flags & DRM_MODE_FLAG_DBLSCAN) {
690 *status = MODE_NO_DBLESCAN;
694 max_link_clock = intel_dp_max_link_rate(intel_dp);
695 max_lanes = intel_dp_max_lane_count(intel_dp);
697 max_rate = intel_dp_max_data_rate(max_link_clock, max_lanes);
698 mode_rate = intel_dp_link_required(mode->clock, min_bpp);
700 ret = drm_modeset_lock(&mgr->base.lock, ctx);
704 if (mode_rate > max_rate || mode->clock > max_dotclk ||
705 drm_dp_calc_pbn_mode(mode->clock, min_bpp, false) > port->full_pbn) {
706 *status = MODE_CLOCK_HIGH;
710 if (mode->clock < 10000) {
711 *status = MODE_CLOCK_LOW;
715 if (mode->flags & DRM_MODE_FLAG_DBLCLK) {
716 *status = MODE_H_ILLEGAL;
720 *status = intel_mode_valid_max_plane_size(dev_priv, mode, false);
724 static struct drm_encoder *intel_mst_atomic_best_encoder(struct drm_connector *connector,
725 struct drm_atomic_state *state)
727 struct drm_connector_state *connector_state = drm_atomic_get_new_connector_state(state,
729 struct intel_connector *intel_connector = to_intel_connector(connector);
730 struct intel_dp *intel_dp = intel_connector->mst_port;
731 struct intel_crtc *crtc = to_intel_crtc(connector_state->crtc);
733 return &intel_dp->mst_encoders[crtc->pipe]->base.base;
737 intel_dp_mst_detect(struct drm_connector *connector,
738 struct drm_modeset_acquire_ctx *ctx, bool force)
740 struct drm_i915_private *i915 = to_i915(connector->dev);
741 struct intel_connector *intel_connector = to_intel_connector(connector);
742 struct intel_dp *intel_dp = intel_connector->mst_port;
744 if (!INTEL_DISPLAY_ENABLED(i915))
745 return connector_status_disconnected;
747 if (drm_connector_is_unregistered(connector))
748 return connector_status_disconnected;
750 return drm_dp_mst_detect_port(connector, ctx, &intel_dp->mst_mgr,
751 intel_connector->port);
754 static const struct drm_connector_helper_funcs intel_dp_mst_connector_helper_funcs = {
755 .get_modes = intel_dp_mst_get_modes,
756 .mode_valid_ctx = intel_dp_mst_mode_valid_ctx,
757 .atomic_best_encoder = intel_mst_atomic_best_encoder,
758 .atomic_check = intel_dp_mst_atomic_check,
759 .detect_ctx = intel_dp_mst_detect,
762 static void intel_dp_mst_encoder_destroy(struct drm_encoder *encoder)
764 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(to_intel_encoder(encoder));
766 drm_encoder_cleanup(encoder);
770 static const struct drm_encoder_funcs intel_dp_mst_enc_funcs = {
771 .destroy = intel_dp_mst_encoder_destroy,
774 static bool intel_dp_mst_get_hw_state(struct intel_connector *connector)
776 if (intel_attached_encoder(connector) && connector->base.state->crtc) {
778 if (!intel_attached_encoder(connector)->get_hw_state(intel_attached_encoder(connector), &pipe))
785 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)
787 struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr);
788 struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
789 struct drm_device *dev = dig_port->base.base.dev;
790 struct drm_i915_private *dev_priv = to_i915(dev);
791 struct intel_connector *intel_connector;
792 struct drm_connector *connector;
796 intel_connector = intel_connector_alloc();
797 if (!intel_connector)
800 intel_connector->get_hw_state = intel_dp_mst_get_hw_state;
801 intel_connector->mst_port = intel_dp;
802 intel_connector->port = port;
803 drm_dp_mst_get_port_malloc(port);
805 connector = &intel_connector->base;
806 ret = drm_connector_init(dev, connector, &intel_dp_mst_connector_funcs,
807 DRM_MODE_CONNECTOR_DisplayPort);
809 intel_connector_free(intel_connector);
813 drm_connector_helper_add(connector, &intel_dp_mst_connector_helper_funcs);
815 for_each_pipe(dev_priv, pipe) {
816 struct drm_encoder *enc =
817 &intel_dp->mst_encoders[pipe]->base.base;
819 ret = drm_connector_attach_encoder(&intel_connector->base, enc);
824 drm_object_attach_property(&connector->base, dev->mode_config.path_property, 0);
825 drm_object_attach_property(&connector->base, dev->mode_config.tile_property, 0);
827 ret = drm_connector_set_path_property(connector, pathprop);
831 intel_attach_force_audio_property(connector);
832 intel_attach_broadcast_rgb_property(connector);
834 if (DISPLAY_VER(dev_priv) <= 12) {
835 ret = intel_dp_init_hdcp(dig_port, intel_connector);
837 drm_dbg_kms(&dev_priv->drm, "[%s:%d] HDCP MST init failed, skipping.\n",
838 connector->name, connector->base.id);
842 * Reuse the prop from the SST connector because we're
843 * not allowed to create new props after device registration.
845 connector->max_bpc_property =
846 intel_dp->attached_connector->base.max_bpc_property;
847 if (connector->max_bpc_property)
848 drm_connector_attach_max_bpc_property(connector, 6, 12);
853 drm_connector_cleanup(connector);
858 intel_dp_mst_poll_hpd_irq(struct drm_dp_mst_topology_mgr *mgr)
860 struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr);
862 intel_hpd_trigger_irq(dp_to_dig_port(intel_dp));
865 static const struct drm_dp_mst_topology_cbs mst_cbs = {
866 .add_connector = intel_dp_add_mst_connector,
867 .poll_hpd_irq = intel_dp_mst_poll_hpd_irq,
870 static struct intel_dp_mst_encoder *
871 intel_dp_create_fake_mst_encoder(struct intel_digital_port *dig_port, enum pipe pipe)
873 struct intel_dp_mst_encoder *intel_mst;
874 struct intel_encoder *intel_encoder;
875 struct drm_device *dev = dig_port->base.base.dev;
877 intel_mst = kzalloc(sizeof(*intel_mst), GFP_KERNEL);
882 intel_mst->pipe = pipe;
883 intel_encoder = &intel_mst->base;
884 intel_mst->primary = dig_port;
886 drm_encoder_init(dev, &intel_encoder->base, &intel_dp_mst_enc_funcs,
887 DRM_MODE_ENCODER_DPMST, "DP-MST %c", pipe_name(pipe));
889 intel_encoder->type = INTEL_OUTPUT_DP_MST;
890 intel_encoder->power_domain = dig_port->base.power_domain;
891 intel_encoder->port = dig_port->base.port;
892 intel_encoder->cloneable = 0;
894 * This is wrong, but broken userspace uses the intersection
895 * of possible_crtcs of all the encoders of a given connector
896 * to figure out which crtcs can drive said connector. What
897 * should be used instead is the union of possible_crtcs.
898 * To keep such userspace functioning we must misconfigure
899 * this to make sure the intersection is not empty :(
901 intel_encoder->pipe_mask = ~0;
903 intel_encoder->compute_config = intel_dp_mst_compute_config;
904 intel_encoder->compute_config_late = intel_dp_mst_compute_config_late;
905 intel_encoder->disable = intel_mst_disable_dp;
906 intel_encoder->post_disable = intel_mst_post_disable_dp;
907 intel_encoder->update_pipe = intel_ddi_update_pipe;
908 intel_encoder->pre_pll_enable = intel_mst_pre_pll_enable_dp;
909 intel_encoder->pre_enable = intel_mst_pre_enable_dp;
910 intel_encoder->enable = intel_mst_enable_dp;
911 intel_encoder->get_hw_state = intel_dp_mst_enc_get_hw_state;
912 intel_encoder->get_config = intel_dp_mst_enc_get_config;
913 intel_encoder->initial_fastset_check = intel_dp_mst_initial_fastset_check;
920 intel_dp_create_fake_mst_encoders(struct intel_digital_port *dig_port)
922 struct intel_dp *intel_dp = &dig_port->dp;
923 struct drm_i915_private *dev_priv = to_i915(dig_port->base.base.dev);
926 for_each_pipe(dev_priv, pipe)
927 intel_dp->mst_encoders[pipe] = intel_dp_create_fake_mst_encoder(dig_port, pipe);
932 intel_dp_mst_encoder_active_links(struct intel_digital_port *dig_port)
934 return dig_port->dp.active_mst_links;
938 intel_dp_mst_encoder_init(struct intel_digital_port *dig_port, int conn_base_id)
940 struct drm_i915_private *i915 = to_i915(dig_port->base.base.dev);
941 struct intel_dp *intel_dp = &dig_port->dp;
942 enum port port = dig_port->base.port;
945 if (!HAS_DP_MST(i915) || intel_dp_is_edp(intel_dp))
948 if (DISPLAY_VER(i915) < 12 && port == PORT_A)
951 if (DISPLAY_VER(i915) < 11 && port == PORT_E)
954 intel_dp->mst_mgr.cbs = &mst_cbs;
956 /* create encoders */
957 intel_dp_create_fake_mst_encoders(dig_port);
958 ret = drm_dp_mst_topology_mgr_init(&intel_dp->mst_mgr, &i915->drm,
959 &intel_dp->aux, 16, 3, conn_base_id);
963 intel_dp->can_mst = true;
969 intel_dp_mst_encoder_cleanup(struct intel_digital_port *dig_port)
971 struct intel_dp *intel_dp = &dig_port->dp;
973 if (!intel_dp->can_mst)
976 drm_dp_mst_topology_mgr_destroy(&intel_dp->mst_mgr);
977 /* encoders will get killed by normal cleanup */
980 bool intel_dp_mst_is_master_trans(const struct intel_crtc_state *crtc_state)
982 return crtc_state->mst_master_transcoder == crtc_state->cpu_transcoder;
985 bool intel_dp_mst_is_slave_trans(const struct intel_crtc_state *crtc_state)
987 return crtc_state->mst_master_transcoder != INVALID_TRANSCODER &&
988 crtc_state->mst_master_transcoder != crtc_state->cpu_transcoder;