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
28 #include "intel_drv.h"
29 #include <drm/drm_atomic_helper.h>
30 #include <drm/drm_crtc_helper.h>
31 #include <drm/drm_edid.h>
33 static bool intel_dp_mst_compute_config(struct intel_encoder *encoder,
34 struct intel_crtc_state *pipe_config,
35 struct drm_connector_state *conn_state)
37 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
38 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
39 struct intel_digital_port *intel_dig_port = intel_mst->primary;
40 struct intel_dp *intel_dp = &intel_dig_port->dp;
41 struct intel_connector *connector =
42 to_intel_connector(conn_state->connector);
43 struct drm_atomic_state *state = pipe_config->base.state;
45 int lane_count, slots;
46 const struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode;
48 bool reduce_m_n = drm_dp_has_quirk(&intel_dp->desc,
49 DP_DPCD_QUIRK_LIMITED_M_N);
51 if (adjusted_mode->flags & DRM_MODE_FLAG_DBLSCAN)
54 pipe_config->has_pch_encoder = false;
56 if (intel_dp->compliance.test_data.bpc) {
57 bpp = intel_dp->compliance.test_data.bpc * 3;
58 DRM_DEBUG_KMS("Setting pipe bpp to %d\n",
62 * for MST we always configure max link bw - the spec doesn't
63 * seem to suggest we should do otherwise.
65 lane_count = intel_dp_max_lane_count(intel_dp);
67 pipe_config->lane_count = lane_count;
69 pipe_config->pipe_bpp = bpp;
71 pipe_config->port_clock = intel_dp_max_link_rate(intel_dp);
73 if (drm_dp_mst_port_has_audio(&intel_dp->mst_mgr, connector->port))
74 pipe_config->has_audio = true;
76 mst_pbn = drm_dp_calc_pbn_mode(adjusted_mode->crtc_clock, bpp);
77 pipe_config->pbn = mst_pbn;
79 slots = drm_dp_atomic_find_vcpi_slots(state, &intel_dp->mst_mgr,
80 connector->port, mst_pbn);
82 DRM_DEBUG_KMS("failed finding vcpi slots:%d\n", slots);
86 intel_link_compute_m_n(bpp, lane_count,
87 adjusted_mode->crtc_clock,
88 pipe_config->port_clock,
92 pipe_config->dp_m_n.tu = slots;
94 if (IS_GEN9_LP(dev_priv))
95 pipe_config->lane_lat_optim_mask =
96 bxt_ddi_phy_calc_lane_lat_optim_mask(pipe_config->lane_count);
98 intel_ddi_compute_min_voltage_level(dev_priv, pipe_config);
103 static int intel_dp_mst_atomic_check(struct drm_connector *connector,
104 struct drm_connector_state *new_conn_state)
106 struct drm_atomic_state *state = new_conn_state->state;
107 struct drm_connector_state *old_conn_state;
108 struct drm_crtc *old_crtc;
109 struct drm_crtc_state *crtc_state;
112 old_conn_state = drm_atomic_get_old_connector_state(state, connector);
113 old_crtc = old_conn_state->crtc;
117 crtc_state = drm_atomic_get_new_crtc_state(state, old_crtc);
118 slots = to_intel_crtc_state(crtc_state)->dp_m_n.tu;
119 if (drm_atomic_crtc_needs_modeset(crtc_state) && slots > 0) {
120 struct drm_dp_mst_topology_mgr *mgr;
121 struct drm_encoder *old_encoder;
123 old_encoder = old_conn_state->best_encoder;
124 mgr = &enc_to_mst(old_encoder)->primary->dp.mst_mgr;
126 ret = drm_dp_atomic_release_vcpi_slots(state, mgr, slots);
128 DRM_DEBUG_KMS("failed releasing %d vcpi slots:%d\n", slots, ret);
130 to_intel_crtc_state(crtc_state)->dp_m_n.tu = 0;
135 static void intel_mst_disable_dp(struct intel_encoder *encoder,
136 const struct intel_crtc_state *old_crtc_state,
137 const struct drm_connector_state *old_conn_state)
139 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
140 struct intel_digital_port *intel_dig_port = intel_mst->primary;
141 struct intel_dp *intel_dp = &intel_dig_port->dp;
142 struct intel_connector *connector =
143 to_intel_connector(old_conn_state->connector);
146 DRM_DEBUG_KMS("active links %d\n", intel_dp->active_mst_links);
148 drm_dp_mst_reset_vcpi_slots(&intel_dp->mst_mgr, connector->port);
150 ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
152 DRM_ERROR("failed to update payload %d\n", ret);
154 if (old_crtc_state->has_audio)
155 intel_audio_codec_disable(encoder,
156 old_crtc_state, old_conn_state);
159 static void intel_mst_post_disable_dp(struct intel_encoder *encoder,
160 const struct intel_crtc_state *old_crtc_state,
161 const struct drm_connector_state *old_conn_state)
163 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
164 struct intel_digital_port *intel_dig_port = intel_mst->primary;
165 struct intel_dp *intel_dp = &intel_dig_port->dp;
166 struct intel_connector *connector =
167 to_intel_connector(old_conn_state->connector);
170 drm_dp_check_act_status(&intel_dp->mst_mgr);
171 /* and this can also fail */
172 drm_dp_update_payload_part2(&intel_dp->mst_mgr);
174 drm_dp_mst_deallocate_vcpi(&intel_dp->mst_mgr, connector->port);
177 * Power down mst path before disabling the port, otherwise we end
178 * up getting interrupts from the sink upon detecting link loss.
180 drm_dp_send_power_updown_phy(&intel_dp->mst_mgr, connector->port,
183 intel_dp->active_mst_links--;
185 intel_mst->connector = NULL;
186 if (intel_dp->active_mst_links == 0) {
187 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_OFF);
188 intel_dig_port->base.post_disable(&intel_dig_port->base,
189 old_crtc_state, NULL);
192 DRM_DEBUG_KMS("active links %d\n", intel_dp->active_mst_links);
195 static void intel_mst_pre_pll_enable_dp(struct intel_encoder *encoder,
196 const struct intel_crtc_state *pipe_config,
197 const struct drm_connector_state *conn_state)
199 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
200 struct intel_digital_port *intel_dig_port = intel_mst->primary;
201 struct intel_dp *intel_dp = &intel_dig_port->dp;
203 if (intel_dp->active_mst_links == 0 &&
204 intel_dig_port->base.pre_pll_enable)
205 intel_dig_port->base.pre_pll_enable(&intel_dig_port->base,
209 static void intel_mst_pre_enable_dp(struct intel_encoder *encoder,
210 const struct intel_crtc_state *pipe_config,
211 const struct drm_connector_state *conn_state)
213 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
214 struct intel_digital_port *intel_dig_port = intel_mst->primary;
215 struct intel_dp *intel_dp = &intel_dig_port->dp;
216 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
217 enum port port = intel_dig_port->base.port;
218 struct intel_connector *connector =
219 to_intel_connector(conn_state->connector);
223 /* MST encoders are bound to a crtc, not to a connector,
224 * force the mapping here for get_hw_state.
226 connector->encoder = encoder;
227 intel_mst->connector = connector;
229 DRM_DEBUG_KMS("active links %d\n", intel_dp->active_mst_links);
231 if (intel_dp->active_mst_links == 0)
232 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON);
234 drm_dp_send_power_updown_phy(&intel_dp->mst_mgr, connector->port, true);
236 if (intel_dp->active_mst_links == 0)
237 intel_dig_port->base.pre_enable(&intel_dig_port->base,
240 ret = drm_dp_mst_allocate_vcpi(&intel_dp->mst_mgr,
243 pipe_config->dp_m_n.tu);
245 DRM_ERROR("failed to allocate vcpi\n");
250 intel_dp->active_mst_links++;
251 temp = I915_READ(DP_TP_STATUS(port));
252 I915_WRITE(DP_TP_STATUS(port), temp);
254 ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
257 static void intel_mst_enable_dp(struct intel_encoder *encoder,
258 const struct intel_crtc_state *pipe_config,
259 const struct drm_connector_state *conn_state)
261 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
262 struct intel_digital_port *intel_dig_port = intel_mst->primary;
263 struct intel_dp *intel_dp = &intel_dig_port->dp;
264 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
265 enum port port = intel_dig_port->base.port;
268 DRM_DEBUG_KMS("active links %d\n", intel_dp->active_mst_links);
270 if (intel_wait_for_register(dev_priv,
272 DP_TP_STATUS_ACT_SENT,
273 DP_TP_STATUS_ACT_SENT,
275 DRM_ERROR("Timed out waiting for ACT sent\n");
277 ret = drm_dp_check_act_status(&intel_dp->mst_mgr);
279 ret = drm_dp_update_payload_part2(&intel_dp->mst_mgr);
280 if (pipe_config->has_audio)
281 intel_audio_codec_enable(encoder, pipe_config, conn_state);
284 static bool intel_dp_mst_enc_get_hw_state(struct intel_encoder *encoder,
287 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
288 *pipe = intel_mst->pipe;
289 if (intel_mst->connector)
294 static void intel_dp_mst_enc_get_config(struct intel_encoder *encoder,
295 struct intel_crtc_state *pipe_config)
297 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
298 struct intel_digital_port *intel_dig_port = intel_mst->primary;
300 intel_ddi_get_config(&intel_dig_port->base, pipe_config);
303 static int intel_dp_mst_get_ddc_modes(struct drm_connector *connector)
305 struct intel_connector *intel_connector = to_intel_connector(connector);
306 struct intel_dp *intel_dp = intel_connector->mst_port;
311 return intel_connector_update_modes(connector, NULL);
314 edid = drm_dp_mst_get_edid(connector, &intel_dp->mst_mgr, intel_connector->port);
315 ret = intel_connector_update_modes(connector, edid);
321 static enum drm_connector_status
322 intel_dp_mst_detect(struct drm_connector *connector, bool force)
324 struct intel_connector *intel_connector = to_intel_connector(connector);
325 struct intel_dp *intel_dp = intel_connector->mst_port;
328 return connector_status_disconnected;
329 return drm_dp_mst_detect_port(connector, &intel_dp->mst_mgr, intel_connector->port);
333 intel_dp_mst_connector_destroy(struct drm_connector *connector)
335 struct intel_connector *intel_connector = to_intel_connector(connector);
337 if (!IS_ERR_OR_NULL(intel_connector->edid))
338 kfree(intel_connector->edid);
340 drm_connector_cleanup(connector);
344 static const struct drm_connector_funcs intel_dp_mst_connector_funcs = {
345 .detect = intel_dp_mst_detect,
346 .fill_modes = drm_helper_probe_single_connector_modes,
347 .late_register = intel_connector_register,
348 .early_unregister = intel_connector_unregister,
349 .destroy = intel_dp_mst_connector_destroy,
350 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
351 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
354 static int intel_dp_mst_get_modes(struct drm_connector *connector)
356 return intel_dp_mst_get_ddc_modes(connector);
359 static enum drm_mode_status
360 intel_dp_mst_mode_valid(struct drm_connector *connector,
361 struct drm_display_mode *mode)
363 struct intel_connector *intel_connector = to_intel_connector(connector);
364 struct intel_dp *intel_dp = intel_connector->mst_port;
365 int max_dotclk = to_i915(connector->dev)->max_dotclk_freq;
366 int bpp = 24; /* MST uses fixed bpp */
367 int max_rate, mode_rate, max_lanes, max_link_clock;
372 if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
373 return MODE_NO_DBLESCAN;
375 max_link_clock = intel_dp_max_link_rate(intel_dp);
376 max_lanes = intel_dp_max_lane_count(intel_dp);
378 max_rate = intel_dp_max_data_rate(max_link_clock, max_lanes);
379 mode_rate = intel_dp_link_required(mode->clock, bpp);
381 /* TODO - validate mode against available PBN for link */
382 if (mode->clock < 10000)
383 return MODE_CLOCK_LOW;
385 if (mode->flags & DRM_MODE_FLAG_DBLCLK)
386 return MODE_H_ILLEGAL;
388 if (mode_rate > max_rate || mode->clock > max_dotclk)
389 return MODE_CLOCK_HIGH;
394 static struct drm_encoder *intel_mst_atomic_best_encoder(struct drm_connector *connector,
395 struct drm_connector_state *state)
397 struct intel_connector *intel_connector = to_intel_connector(connector);
398 struct intel_dp *intel_dp = intel_connector->mst_port;
399 struct intel_crtc *crtc = to_intel_crtc(state->crtc);
403 return &intel_dp->mst_encoders[crtc->pipe]->base.base;
406 static const struct drm_connector_helper_funcs intel_dp_mst_connector_helper_funcs = {
407 .get_modes = intel_dp_mst_get_modes,
408 .mode_valid = intel_dp_mst_mode_valid,
409 .atomic_best_encoder = intel_mst_atomic_best_encoder,
410 .atomic_check = intel_dp_mst_atomic_check,
413 static void intel_dp_mst_encoder_destroy(struct drm_encoder *encoder)
415 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
417 drm_encoder_cleanup(encoder);
421 static const struct drm_encoder_funcs intel_dp_mst_enc_funcs = {
422 .destroy = intel_dp_mst_encoder_destroy,
425 static bool intel_dp_mst_get_hw_state(struct intel_connector *connector)
427 if (connector->encoder && connector->base.state->crtc) {
429 if (!connector->encoder->get_hw_state(connector->encoder, &pipe))
436 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)
438 struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr);
439 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
440 struct drm_device *dev = intel_dig_port->base.base.dev;
441 struct drm_i915_private *dev_priv = to_i915(dev);
442 struct intel_connector *intel_connector;
443 struct drm_connector *connector;
447 intel_connector = intel_connector_alloc();
448 if (!intel_connector)
451 connector = &intel_connector->base;
452 ret = drm_connector_init(dev, connector, &intel_dp_mst_connector_funcs,
453 DRM_MODE_CONNECTOR_DisplayPort);
455 intel_connector_free(intel_connector);
459 drm_connector_helper_add(connector, &intel_dp_mst_connector_helper_funcs);
461 intel_connector->get_hw_state = intel_dp_mst_get_hw_state;
462 intel_connector->mst_port = intel_dp;
463 intel_connector->port = port;
465 for_each_pipe(dev_priv, pipe) {
466 struct drm_encoder *enc =
467 &intel_dp->mst_encoders[pipe]->base.base;
469 ret = drm_connector_attach_encoder(&intel_connector->base, enc);
474 drm_object_attach_property(&connector->base, dev->mode_config.path_property, 0);
475 drm_object_attach_property(&connector->base, dev->mode_config.tile_property, 0);
477 ret = drm_connector_set_path_property(connector, pathprop);
484 drm_connector_cleanup(connector);
488 static void intel_dp_register_mst_connector(struct drm_connector *connector)
490 struct drm_i915_private *dev_priv = to_i915(connector->dev);
493 drm_fb_helper_add_one_connector(&dev_priv->fbdev->helper,
496 drm_connector_register(connector);
499 static void intel_dp_destroy_mst_connector(struct drm_dp_mst_topology_mgr *mgr,
500 struct drm_connector *connector)
502 struct intel_connector *intel_connector = to_intel_connector(connector);
503 struct drm_i915_private *dev_priv = to_i915(connector->dev);
505 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", connector->base.id, connector->name);
506 drm_connector_unregister(connector);
509 drm_fb_helper_remove_one_connector(&dev_priv->fbdev->helper,
511 /* prevent race with the check in ->detect */
512 drm_modeset_lock(&connector->dev->mode_config.connection_mutex, NULL);
513 intel_connector->mst_port = NULL;
514 drm_modeset_unlock(&connector->dev->mode_config.connection_mutex);
516 drm_connector_put(connector);
519 static void intel_dp_mst_hotplug(struct drm_dp_mst_topology_mgr *mgr)
521 struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr);
522 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
523 struct drm_device *dev = intel_dig_port->base.base.dev;
525 drm_kms_helper_hotplug_event(dev);
528 static const struct drm_dp_mst_topology_cbs mst_cbs = {
529 .add_connector = intel_dp_add_mst_connector,
530 .register_connector = intel_dp_register_mst_connector,
531 .destroy_connector = intel_dp_destroy_mst_connector,
532 .hotplug = intel_dp_mst_hotplug,
535 static struct intel_dp_mst_encoder *
536 intel_dp_create_fake_mst_encoder(struct intel_digital_port *intel_dig_port, enum pipe pipe)
538 struct intel_dp_mst_encoder *intel_mst;
539 struct intel_encoder *intel_encoder;
540 struct drm_device *dev = intel_dig_port->base.base.dev;
542 intel_mst = kzalloc(sizeof(*intel_mst), GFP_KERNEL);
547 intel_mst->pipe = pipe;
548 intel_encoder = &intel_mst->base;
549 intel_mst->primary = intel_dig_port;
551 drm_encoder_init(dev, &intel_encoder->base, &intel_dp_mst_enc_funcs,
552 DRM_MODE_ENCODER_DPMST, "DP-MST %c", pipe_name(pipe));
554 intel_encoder->type = INTEL_OUTPUT_DP_MST;
555 intel_encoder->power_domain = intel_dig_port->base.power_domain;
556 intel_encoder->port = intel_dig_port->base.port;
557 intel_encoder->crtc_mask = 0x7;
558 intel_encoder->cloneable = 0;
560 intel_encoder->compute_config = intel_dp_mst_compute_config;
561 intel_encoder->disable = intel_mst_disable_dp;
562 intel_encoder->post_disable = intel_mst_post_disable_dp;
563 intel_encoder->pre_pll_enable = intel_mst_pre_pll_enable_dp;
564 intel_encoder->pre_enable = intel_mst_pre_enable_dp;
565 intel_encoder->enable = intel_mst_enable_dp;
566 intel_encoder->get_hw_state = intel_dp_mst_enc_get_hw_state;
567 intel_encoder->get_config = intel_dp_mst_enc_get_config;
574 intel_dp_create_fake_mst_encoders(struct intel_digital_port *intel_dig_port)
576 struct intel_dp *intel_dp = &intel_dig_port->dp;
577 struct drm_i915_private *dev_priv = to_i915(intel_dig_port->base.base.dev);
580 for_each_pipe(dev_priv, pipe)
581 intel_dp->mst_encoders[pipe] = intel_dp_create_fake_mst_encoder(intel_dig_port, pipe);
586 intel_dp_mst_encoder_init(struct intel_digital_port *intel_dig_port, int conn_base_id)
588 struct intel_dp *intel_dp = &intel_dig_port->dp;
589 struct drm_device *dev = intel_dig_port->base.base.dev;
592 intel_dp->can_mst = true;
593 intel_dp->mst_mgr.cbs = &mst_cbs;
595 /* create encoders */
596 intel_dp_create_fake_mst_encoders(intel_dig_port);
597 ret = drm_dp_mst_topology_mgr_init(&intel_dp->mst_mgr, dev,
598 &intel_dp->aux, 16, 3, conn_base_id);
600 intel_dp->can_mst = false;
607 intel_dp_mst_encoder_cleanup(struct intel_digital_port *intel_dig_port)
609 struct intel_dp *intel_dp = &intel_dig_port->dp;
611 if (!intel_dp->can_mst)
614 drm_dp_mst_topology_mgr_destroy(&intel_dp->mst_mgr);
615 /* encoders will get killed by normal cleanup */