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
27 #include "intel_drv.h"
28 #include <drm/drm_atomic_helper.h>
29 #include <drm/drm_edid.h>
30 #include <drm/drm_probe_helper.h>
32 static int intel_dp_mst_compute_link_config(struct intel_encoder *encoder,
33 struct intel_crtc_state *crtc_state,
34 struct drm_connector_state *conn_state,
35 struct link_config_limits *limits)
37 struct drm_atomic_state *state = crtc_state->base.state;
38 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
39 struct intel_dp *intel_dp = &intel_mst->primary->dp;
40 struct intel_connector *connector =
41 to_intel_connector(conn_state->connector);
42 const struct drm_display_mode *adjusted_mode =
43 &crtc_state->base.adjusted_mode;
44 void *port = connector->port;
45 bool constant_n = drm_dp_has_quirk(&intel_dp->desc,
46 DP_DPCD_QUIRK_CONSTANT_N);
47 int bpp, slots = -EINVAL;
49 crtc_state->lane_count = limits->max_lane_count;
50 crtc_state->port_clock = limits->max_clock;
52 for (bpp = limits->max_bpp; bpp >= limits->min_bpp; bpp -= 2 * 3) {
53 crtc_state->pipe_bpp = bpp;
55 crtc_state->pbn = drm_dp_calc_pbn_mode(adjusted_mode->crtc_clock,
56 crtc_state->pipe_bpp);
58 slots = drm_dp_atomic_find_vcpi_slots(state, &intel_dp->mst_mgr,
59 port, crtc_state->pbn);
60 if (slots == -EDEADLK)
67 DRM_DEBUG_KMS("failed finding vcpi slots:%d\n", slots);
71 intel_link_compute_m_n(crtc_state->pipe_bpp,
72 crtc_state->lane_count,
73 adjusted_mode->crtc_clock,
74 crtc_state->port_clock,
77 crtc_state->dp_m_n.tu = slots;
82 static int intel_dp_mst_compute_config(struct intel_encoder *encoder,
83 struct intel_crtc_state *pipe_config,
84 struct drm_connector_state *conn_state)
86 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
87 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
88 struct intel_dp *intel_dp = &intel_mst->primary->dp;
89 struct intel_connector *connector =
90 to_intel_connector(conn_state->connector);
91 struct intel_digital_connector_state *intel_conn_state =
92 to_intel_digital_connector_state(conn_state);
93 const struct drm_display_mode *adjusted_mode =
94 &pipe_config->base.adjusted_mode;
95 void *port = connector->port;
96 struct link_config_limits limits;
99 if (adjusted_mode->flags & DRM_MODE_FLAG_DBLSCAN)
102 pipe_config->output_format = INTEL_OUTPUT_FORMAT_RGB;
103 pipe_config->has_pch_encoder = false;
105 if (intel_conn_state->force_audio == HDMI_AUDIO_AUTO)
106 pipe_config->has_audio =
107 drm_dp_mst_port_has_audio(&intel_dp->mst_mgr, port);
109 pipe_config->has_audio =
110 intel_conn_state->force_audio == HDMI_AUDIO_ON;
113 * for MST we always configure max link bw - the spec doesn't
114 * seem to suggest we should do otherwise.
117 limits.max_clock = intel_dp_max_link_rate(intel_dp);
119 limits.min_lane_count =
120 limits.max_lane_count = intel_dp_max_lane_count(intel_dp);
122 limits.min_bpp = 6 * 3;
123 limits.max_bpp = pipe_config->pipe_bpp;
125 intel_dp_adjust_compliance_config(intel_dp, pipe_config, &limits);
127 ret = intel_dp_mst_compute_link_config(encoder, pipe_config,
128 conn_state, &limits);
132 pipe_config->limited_color_range =
133 intel_dp_limited_color_range(pipe_config, conn_state);
135 if (IS_GEN9_LP(dev_priv))
136 pipe_config->lane_lat_optim_mask =
137 bxt_ddi_phy_calc_lane_lat_optim_mask(pipe_config->lane_count);
139 intel_ddi_compute_min_voltage_level(dev_priv, pipe_config);
145 intel_dp_mst_atomic_check(struct drm_connector *connector,
146 struct drm_connector_state *new_conn_state)
148 struct drm_atomic_state *state = new_conn_state->state;
149 struct drm_connector_state *old_conn_state =
150 drm_atomic_get_old_connector_state(state, connector);
151 struct intel_connector *intel_connector =
152 to_intel_connector(connector);
153 struct drm_crtc *new_crtc = new_conn_state->crtc;
154 struct drm_crtc_state *crtc_state;
155 struct drm_dp_mst_topology_mgr *mgr;
158 ret = intel_digital_connector_atomic_check(connector, new_conn_state);
162 if (!old_conn_state->crtc)
165 /* We only want to free VCPI if this state disables the CRTC on this
169 crtc_state = drm_atomic_get_new_crtc_state(state, new_crtc);
172 !drm_atomic_crtc_needs_modeset(crtc_state) ||
177 mgr = &enc_to_mst(old_conn_state->best_encoder)->primary->dp.mst_mgr;
178 ret = drm_dp_atomic_release_vcpi_slots(state, mgr,
179 intel_connector->port);
184 static void intel_mst_disable_dp(struct intel_encoder *encoder,
185 const struct intel_crtc_state *old_crtc_state,
186 const struct drm_connector_state *old_conn_state)
188 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
189 struct intel_digital_port *intel_dig_port = intel_mst->primary;
190 struct intel_dp *intel_dp = &intel_dig_port->dp;
191 struct intel_connector *connector =
192 to_intel_connector(old_conn_state->connector);
195 DRM_DEBUG_KMS("active links %d\n", intel_dp->active_mst_links);
197 drm_dp_mst_reset_vcpi_slots(&intel_dp->mst_mgr, connector->port);
199 ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
201 DRM_ERROR("failed to update payload %d\n", ret);
203 if (old_crtc_state->has_audio)
204 intel_audio_codec_disable(encoder,
205 old_crtc_state, old_conn_state);
208 static void intel_mst_post_disable_dp(struct intel_encoder *encoder,
209 const struct intel_crtc_state *old_crtc_state,
210 const struct drm_connector_state *old_conn_state)
212 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
213 struct intel_digital_port *intel_dig_port = intel_mst->primary;
214 struct intel_dp *intel_dp = &intel_dig_port->dp;
215 struct intel_connector *connector =
216 to_intel_connector(old_conn_state->connector);
218 intel_ddi_disable_pipe_clock(old_crtc_state);
221 drm_dp_check_act_status(&intel_dp->mst_mgr);
222 /* and this can also fail */
223 drm_dp_update_payload_part2(&intel_dp->mst_mgr);
225 drm_dp_mst_deallocate_vcpi(&intel_dp->mst_mgr, connector->port);
228 * Power down mst path before disabling the port, otherwise we end
229 * up getting interrupts from the sink upon detecting link loss.
231 drm_dp_send_power_updown_phy(&intel_dp->mst_mgr, connector->port,
234 intel_dp->active_mst_links--;
236 intel_mst->connector = NULL;
237 if (intel_dp->active_mst_links == 0) {
238 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_OFF);
239 intel_dig_port->base.post_disable(&intel_dig_port->base,
240 old_crtc_state, NULL);
243 DRM_DEBUG_KMS("active links %d\n", intel_dp->active_mst_links);
246 static void intel_mst_pre_pll_enable_dp(struct intel_encoder *encoder,
247 const struct intel_crtc_state *pipe_config,
248 const struct drm_connector_state *conn_state)
250 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
251 struct intel_digital_port *intel_dig_port = intel_mst->primary;
252 struct intel_dp *intel_dp = &intel_dig_port->dp;
254 if (intel_dp->active_mst_links == 0)
255 intel_dig_port->base.pre_pll_enable(&intel_dig_port->base,
259 static void intel_mst_post_pll_disable_dp(struct intel_encoder *encoder,
260 const struct intel_crtc_state *old_crtc_state,
261 const struct drm_connector_state *old_conn_state)
263 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
264 struct intel_digital_port *intel_dig_port = intel_mst->primary;
265 struct intel_dp *intel_dp = &intel_dig_port->dp;
267 if (intel_dp->active_mst_links == 0)
268 intel_dig_port->base.post_pll_disable(&intel_dig_port->base,
273 static void intel_mst_pre_enable_dp(struct intel_encoder *encoder,
274 const struct intel_crtc_state *pipe_config,
275 const struct drm_connector_state *conn_state)
277 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
278 struct intel_digital_port *intel_dig_port = intel_mst->primary;
279 struct intel_dp *intel_dp = &intel_dig_port->dp;
280 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
281 enum port port = intel_dig_port->base.port;
282 struct intel_connector *connector =
283 to_intel_connector(conn_state->connector);
287 /* MST encoders are bound to a crtc, not to a connector,
288 * force the mapping here for get_hw_state.
290 connector->encoder = encoder;
291 intel_mst->connector = connector;
293 DRM_DEBUG_KMS("active links %d\n", intel_dp->active_mst_links);
295 if (intel_dp->active_mst_links == 0)
296 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON);
298 drm_dp_send_power_updown_phy(&intel_dp->mst_mgr, connector->port, true);
300 if (intel_dp->active_mst_links == 0)
301 intel_dig_port->base.pre_enable(&intel_dig_port->base,
304 ret = drm_dp_mst_allocate_vcpi(&intel_dp->mst_mgr,
307 pipe_config->dp_m_n.tu);
309 DRM_ERROR("failed to allocate vcpi\n");
311 intel_dp->active_mst_links++;
312 temp = I915_READ(DP_TP_STATUS(port));
313 I915_WRITE(DP_TP_STATUS(port), temp);
315 ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
317 intel_ddi_enable_pipe_clock(pipe_config);
320 static void intel_mst_enable_dp(struct intel_encoder *encoder,
321 const struct intel_crtc_state *pipe_config,
322 const struct drm_connector_state *conn_state)
324 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
325 struct intel_digital_port *intel_dig_port = intel_mst->primary;
326 struct intel_dp *intel_dp = &intel_dig_port->dp;
327 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
328 enum port port = intel_dig_port->base.port;
330 DRM_DEBUG_KMS("active links %d\n", intel_dp->active_mst_links);
332 if (intel_wait_for_register(&dev_priv->uncore,
334 DP_TP_STATUS_ACT_SENT,
335 DP_TP_STATUS_ACT_SENT,
337 DRM_ERROR("Timed out waiting for ACT sent\n");
339 drm_dp_check_act_status(&intel_dp->mst_mgr);
341 drm_dp_update_payload_part2(&intel_dp->mst_mgr);
342 if (pipe_config->has_audio)
343 intel_audio_codec_enable(encoder, pipe_config, conn_state);
346 static bool intel_dp_mst_enc_get_hw_state(struct intel_encoder *encoder,
349 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
350 *pipe = intel_mst->pipe;
351 if (intel_mst->connector)
356 static void intel_dp_mst_enc_get_config(struct intel_encoder *encoder,
357 struct intel_crtc_state *pipe_config)
359 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
360 struct intel_digital_port *intel_dig_port = intel_mst->primary;
362 intel_ddi_get_config(&intel_dig_port->base, pipe_config);
365 static int intel_dp_mst_get_ddc_modes(struct drm_connector *connector)
367 struct intel_connector *intel_connector = to_intel_connector(connector);
368 struct intel_dp *intel_dp = intel_connector->mst_port;
372 if (drm_connector_is_unregistered(connector))
373 return intel_connector_update_modes(connector, NULL);
375 edid = drm_dp_mst_get_edid(connector, &intel_dp->mst_mgr, intel_connector->port);
376 ret = intel_connector_update_modes(connector, edid);
382 static enum drm_connector_status
383 intel_dp_mst_detect(struct drm_connector *connector, bool force)
385 struct intel_connector *intel_connector = to_intel_connector(connector);
386 struct intel_dp *intel_dp = intel_connector->mst_port;
388 if (drm_connector_is_unregistered(connector))
389 return connector_status_disconnected;
390 return drm_dp_mst_detect_port(connector, &intel_dp->mst_mgr,
391 intel_connector->port);
394 static const struct drm_connector_funcs intel_dp_mst_connector_funcs = {
395 .detect = intel_dp_mst_detect,
396 .fill_modes = drm_helper_probe_single_connector_modes,
397 .atomic_get_property = intel_digital_connector_atomic_get_property,
398 .atomic_set_property = intel_digital_connector_atomic_set_property,
399 .late_register = intel_connector_register,
400 .early_unregister = intel_connector_unregister,
401 .destroy = intel_connector_destroy,
402 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
403 .atomic_duplicate_state = intel_digital_connector_duplicate_state,
406 static int intel_dp_mst_get_modes(struct drm_connector *connector)
408 return intel_dp_mst_get_ddc_modes(connector);
411 static enum drm_mode_status
412 intel_dp_mst_mode_valid(struct drm_connector *connector,
413 struct drm_display_mode *mode)
415 struct intel_connector *intel_connector = to_intel_connector(connector);
416 struct intel_dp *intel_dp = intel_connector->mst_port;
417 int max_dotclk = to_i915(connector->dev)->max_dotclk_freq;
418 int max_rate, mode_rate, max_lanes, max_link_clock;
420 if (drm_connector_is_unregistered(connector))
423 if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
424 return MODE_NO_DBLESCAN;
426 max_link_clock = intel_dp_max_link_rate(intel_dp);
427 max_lanes = intel_dp_max_lane_count(intel_dp);
429 max_rate = intel_dp_max_data_rate(max_link_clock, max_lanes);
430 mode_rate = intel_dp_link_required(mode->clock, 18);
432 /* TODO - validate mode against available PBN for link */
433 if (mode->clock < 10000)
434 return MODE_CLOCK_LOW;
436 if (mode->flags & DRM_MODE_FLAG_DBLCLK)
437 return MODE_H_ILLEGAL;
439 if (mode_rate > max_rate || mode->clock > max_dotclk)
440 return MODE_CLOCK_HIGH;
445 static struct drm_encoder *intel_mst_atomic_best_encoder(struct drm_connector *connector,
446 struct drm_connector_state *state)
448 struct intel_connector *intel_connector = to_intel_connector(connector);
449 struct intel_dp *intel_dp = intel_connector->mst_port;
450 struct intel_crtc *crtc = to_intel_crtc(state->crtc);
452 return &intel_dp->mst_encoders[crtc->pipe]->base.base;
455 static const struct drm_connector_helper_funcs intel_dp_mst_connector_helper_funcs = {
456 .get_modes = intel_dp_mst_get_modes,
457 .mode_valid = intel_dp_mst_mode_valid,
458 .atomic_best_encoder = intel_mst_atomic_best_encoder,
459 .atomic_check = intel_dp_mst_atomic_check,
462 static void intel_dp_mst_encoder_destroy(struct drm_encoder *encoder)
464 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
466 drm_encoder_cleanup(encoder);
470 static const struct drm_encoder_funcs intel_dp_mst_enc_funcs = {
471 .destroy = intel_dp_mst_encoder_destroy,
474 static bool intel_dp_mst_get_hw_state(struct intel_connector *connector)
476 if (connector->encoder && connector->base.state->crtc) {
478 if (!connector->encoder->get_hw_state(connector->encoder, &pipe))
485 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)
487 struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr);
488 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
489 struct drm_device *dev = intel_dig_port->base.base.dev;
490 struct drm_i915_private *dev_priv = to_i915(dev);
491 struct intel_connector *intel_connector;
492 struct drm_connector *connector;
496 intel_connector = intel_connector_alloc();
497 if (!intel_connector)
500 intel_connector->get_hw_state = intel_dp_mst_get_hw_state;
501 intel_connector->mst_port = intel_dp;
502 intel_connector->port = port;
503 drm_dp_mst_get_port_malloc(port);
505 connector = &intel_connector->base;
506 ret = drm_connector_init(dev, connector, &intel_dp_mst_connector_funcs,
507 DRM_MODE_CONNECTOR_DisplayPort);
509 intel_connector_free(intel_connector);
513 drm_connector_helper_add(connector, &intel_dp_mst_connector_helper_funcs);
515 for_each_pipe(dev_priv, pipe) {
516 struct drm_encoder *enc =
517 &intel_dp->mst_encoders[pipe]->base.base;
519 ret = drm_connector_attach_encoder(&intel_connector->base, enc);
524 drm_object_attach_property(&connector->base, dev->mode_config.path_property, 0);
525 drm_object_attach_property(&connector->base, dev->mode_config.tile_property, 0);
527 ret = drm_connector_set_path_property(connector, pathprop);
531 intel_attach_force_audio_property(connector);
532 intel_attach_broadcast_rgb_property(connector);
533 drm_connector_attach_max_bpc_property(connector, 6, 12);
538 drm_connector_cleanup(connector);
542 static void intel_dp_register_mst_connector(struct drm_connector *connector)
544 struct drm_i915_private *dev_priv = to_i915(connector->dev);
547 drm_fb_helper_add_one_connector(&dev_priv->fbdev->helper,
550 drm_connector_register(connector);
553 static void intel_dp_destroy_mst_connector(struct drm_dp_mst_topology_mgr *mgr,
554 struct drm_connector *connector)
556 struct drm_i915_private *dev_priv = to_i915(connector->dev);
558 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", connector->base.id, connector->name);
559 drm_connector_unregister(connector);
562 drm_fb_helper_remove_one_connector(&dev_priv->fbdev->helper,
565 drm_connector_put(connector);
568 static const struct drm_dp_mst_topology_cbs mst_cbs = {
569 .add_connector = intel_dp_add_mst_connector,
570 .register_connector = intel_dp_register_mst_connector,
571 .destroy_connector = intel_dp_destroy_mst_connector,
574 static struct intel_dp_mst_encoder *
575 intel_dp_create_fake_mst_encoder(struct intel_digital_port *intel_dig_port, enum pipe pipe)
577 struct intel_dp_mst_encoder *intel_mst;
578 struct intel_encoder *intel_encoder;
579 struct drm_device *dev = intel_dig_port->base.base.dev;
581 intel_mst = kzalloc(sizeof(*intel_mst), GFP_KERNEL);
586 intel_mst->pipe = pipe;
587 intel_encoder = &intel_mst->base;
588 intel_mst->primary = intel_dig_port;
590 drm_encoder_init(dev, &intel_encoder->base, &intel_dp_mst_enc_funcs,
591 DRM_MODE_ENCODER_DPMST, "DP-MST %c", pipe_name(pipe));
593 intel_encoder->type = INTEL_OUTPUT_DP_MST;
594 intel_encoder->power_domain = intel_dig_port->base.power_domain;
595 intel_encoder->port = intel_dig_port->base.port;
596 intel_encoder->crtc_mask = 0x7;
597 intel_encoder->cloneable = 0;
599 intel_encoder->compute_config = intel_dp_mst_compute_config;
600 intel_encoder->disable = intel_mst_disable_dp;
601 intel_encoder->post_disable = intel_mst_post_disable_dp;
602 intel_encoder->pre_pll_enable = intel_mst_pre_pll_enable_dp;
603 intel_encoder->post_pll_disable = intel_mst_post_pll_disable_dp;
604 intel_encoder->pre_enable = intel_mst_pre_enable_dp;
605 intel_encoder->enable = intel_mst_enable_dp;
606 intel_encoder->get_hw_state = intel_dp_mst_enc_get_hw_state;
607 intel_encoder->get_config = intel_dp_mst_enc_get_config;
614 intel_dp_create_fake_mst_encoders(struct intel_digital_port *intel_dig_port)
616 struct intel_dp *intel_dp = &intel_dig_port->dp;
617 struct drm_i915_private *dev_priv = to_i915(intel_dig_port->base.base.dev);
620 for_each_pipe(dev_priv, pipe)
621 intel_dp->mst_encoders[pipe] = intel_dp_create_fake_mst_encoder(intel_dig_port, pipe);
626 intel_dp_mst_encoder_init(struct intel_digital_port *intel_dig_port, int conn_base_id)
628 struct intel_dp *intel_dp = &intel_dig_port->dp;
629 struct drm_device *dev = intel_dig_port->base.base.dev;
632 intel_dp->can_mst = true;
633 intel_dp->mst_mgr.cbs = &mst_cbs;
635 /* create encoders */
636 intel_dp_create_fake_mst_encoders(intel_dig_port);
637 ret = drm_dp_mst_topology_mgr_init(&intel_dp->mst_mgr, dev,
638 &intel_dp->aux, 16, 3, conn_base_id);
640 intel_dp->can_mst = false;
647 intel_dp_mst_encoder_cleanup(struct intel_digital_port *intel_dig_port)
649 struct intel_dp *intel_dp = &intel_dig_port->dp;
651 if (!intel_dp->can_mst)
654 drm_dp_mst_topology_mgr_destroy(&intel_dp->mst_mgr);
655 /* encoders will get killed by normal cleanup */