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 pipe_config->has_pch_encoder = false;
53 if (intel_dp->compliance.test_data.bpc) {
54 bpp = intel_dp->compliance.test_data.bpc * 3;
55 DRM_DEBUG_KMS("Setting pipe bpp to %d\n",
59 * for MST we always configure max link bw - the spec doesn't
60 * seem to suggest we should do otherwise.
62 lane_count = intel_dp_max_lane_count(intel_dp);
64 pipe_config->lane_count = lane_count;
66 pipe_config->pipe_bpp = bpp;
68 pipe_config->port_clock = intel_dp_max_link_rate(intel_dp);
70 if (drm_dp_mst_port_has_audio(&intel_dp->mst_mgr, connector->port))
71 pipe_config->has_audio = true;
73 mst_pbn = drm_dp_calc_pbn_mode(adjusted_mode->crtc_clock, bpp);
74 pipe_config->pbn = mst_pbn;
76 slots = drm_dp_atomic_find_vcpi_slots(state, &intel_dp->mst_mgr,
77 connector->port, mst_pbn);
79 DRM_DEBUG_KMS("failed finding vcpi slots:%d\n", slots);
83 intel_link_compute_m_n(bpp, lane_count,
84 adjusted_mode->crtc_clock,
85 pipe_config->port_clock,
89 pipe_config->dp_m_n.tu = slots;
91 if (IS_GEN9_LP(dev_priv))
92 pipe_config->lane_lat_optim_mask =
93 bxt_ddi_phy_calc_lane_lat_optim_mask(pipe_config->lane_count);
95 intel_ddi_compute_min_voltage_level(dev_priv, pipe_config);
100 static int intel_dp_mst_atomic_check(struct drm_connector *connector,
101 struct drm_connector_state *new_conn_state)
103 struct drm_atomic_state *state = new_conn_state->state;
104 struct drm_connector_state *old_conn_state;
105 struct drm_crtc *old_crtc;
106 struct drm_crtc_state *crtc_state;
109 old_conn_state = drm_atomic_get_old_connector_state(state, connector);
110 old_crtc = old_conn_state->crtc;
114 crtc_state = drm_atomic_get_new_crtc_state(state, old_crtc);
115 slots = to_intel_crtc_state(crtc_state)->dp_m_n.tu;
116 if (drm_atomic_crtc_needs_modeset(crtc_state) && slots > 0) {
117 struct drm_dp_mst_topology_mgr *mgr;
118 struct drm_encoder *old_encoder;
120 old_encoder = old_conn_state->best_encoder;
121 mgr = &enc_to_mst(old_encoder)->primary->dp.mst_mgr;
123 ret = drm_dp_atomic_release_vcpi_slots(state, mgr, slots);
125 DRM_DEBUG_KMS("failed releasing %d vcpi slots:%d\n", slots, ret);
127 to_intel_crtc_state(crtc_state)->dp_m_n.tu = 0;
132 static void intel_mst_disable_dp(struct intel_encoder *encoder,
133 const struct intel_crtc_state *old_crtc_state,
134 const struct drm_connector_state *old_conn_state)
136 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
137 struct intel_digital_port *intel_dig_port = intel_mst->primary;
138 struct intel_dp *intel_dp = &intel_dig_port->dp;
139 struct intel_connector *connector =
140 to_intel_connector(old_conn_state->connector);
143 DRM_DEBUG_KMS("active links %d\n", intel_dp->active_mst_links);
145 drm_dp_mst_reset_vcpi_slots(&intel_dp->mst_mgr, connector->port);
147 ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
149 DRM_ERROR("failed to update payload %d\n", ret);
151 if (old_crtc_state->has_audio)
152 intel_audio_codec_disable(encoder,
153 old_crtc_state, old_conn_state);
156 static void intel_mst_post_disable_dp(struct intel_encoder *encoder,
157 const struct intel_crtc_state *old_crtc_state,
158 const struct drm_connector_state *old_conn_state)
160 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
161 struct intel_digital_port *intel_dig_port = intel_mst->primary;
162 struct intel_dp *intel_dp = &intel_dig_port->dp;
163 struct intel_connector *connector =
164 to_intel_connector(old_conn_state->connector);
167 drm_dp_check_act_status(&intel_dp->mst_mgr);
168 /* and this can also fail */
169 drm_dp_update_payload_part2(&intel_dp->mst_mgr);
171 drm_dp_mst_deallocate_vcpi(&intel_dp->mst_mgr, connector->port);
174 * Power down mst path before disabling the port, otherwise we end
175 * up getting interrupts from the sink upon detecting link loss.
177 drm_dp_send_power_updown_phy(&intel_dp->mst_mgr, connector->port,
180 intel_dp->active_mst_links--;
182 intel_mst->connector = NULL;
183 if (intel_dp->active_mst_links == 0) {
184 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_OFF);
185 intel_dig_port->base.post_disable(&intel_dig_port->base,
186 old_crtc_state, NULL);
189 DRM_DEBUG_KMS("active links %d\n", intel_dp->active_mst_links);
192 static void intel_mst_pre_pll_enable_dp(struct intel_encoder *encoder,
193 const struct intel_crtc_state *pipe_config,
194 const struct drm_connector_state *conn_state)
196 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
197 struct intel_digital_port *intel_dig_port = intel_mst->primary;
198 struct intel_dp *intel_dp = &intel_dig_port->dp;
200 if (intel_dp->active_mst_links == 0 &&
201 intel_dig_port->base.pre_pll_enable)
202 intel_dig_port->base.pre_pll_enable(&intel_dig_port->base,
206 static void intel_mst_pre_enable_dp(struct intel_encoder *encoder,
207 const struct intel_crtc_state *pipe_config,
208 const struct drm_connector_state *conn_state)
210 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
211 struct intel_digital_port *intel_dig_port = intel_mst->primary;
212 struct intel_dp *intel_dp = &intel_dig_port->dp;
213 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
214 enum port port = intel_dig_port->base.port;
215 struct intel_connector *connector =
216 to_intel_connector(conn_state->connector);
220 /* MST encoders are bound to a crtc, not to a connector,
221 * force the mapping here for get_hw_state.
223 connector->encoder = encoder;
224 intel_mst->connector = connector;
226 DRM_DEBUG_KMS("active links %d\n", intel_dp->active_mst_links);
228 if (intel_dp->active_mst_links == 0)
229 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON);
231 drm_dp_send_power_updown_phy(&intel_dp->mst_mgr, connector->port, true);
233 if (intel_dp->active_mst_links == 0)
234 intel_dig_port->base.pre_enable(&intel_dig_port->base,
237 ret = drm_dp_mst_allocate_vcpi(&intel_dp->mst_mgr,
240 pipe_config->dp_m_n.tu);
242 DRM_ERROR("failed to allocate vcpi\n");
247 intel_dp->active_mst_links++;
248 temp = I915_READ(DP_TP_STATUS(port));
249 I915_WRITE(DP_TP_STATUS(port), temp);
251 ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
254 static void intel_mst_enable_dp(struct intel_encoder *encoder,
255 const struct intel_crtc_state *pipe_config,
256 const struct drm_connector_state *conn_state)
258 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
259 struct intel_digital_port *intel_dig_port = intel_mst->primary;
260 struct intel_dp *intel_dp = &intel_dig_port->dp;
261 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
262 enum port port = intel_dig_port->base.port;
265 DRM_DEBUG_KMS("active links %d\n", intel_dp->active_mst_links);
267 if (intel_wait_for_register(dev_priv,
269 DP_TP_STATUS_ACT_SENT,
270 DP_TP_STATUS_ACT_SENT,
272 DRM_ERROR("Timed out waiting for ACT sent\n");
274 ret = drm_dp_check_act_status(&intel_dp->mst_mgr);
276 ret = drm_dp_update_payload_part2(&intel_dp->mst_mgr);
277 if (pipe_config->has_audio)
278 intel_audio_codec_enable(encoder, pipe_config, conn_state);
281 static bool intel_dp_mst_enc_get_hw_state(struct intel_encoder *encoder,
284 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
285 *pipe = intel_mst->pipe;
286 if (intel_mst->connector)
291 static void intel_dp_mst_enc_get_config(struct intel_encoder *encoder,
292 struct intel_crtc_state *pipe_config)
294 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
295 struct intel_digital_port *intel_dig_port = intel_mst->primary;
297 intel_ddi_get_config(&intel_dig_port->base, pipe_config);
300 static int intel_dp_mst_get_ddc_modes(struct drm_connector *connector)
302 struct intel_connector *intel_connector = to_intel_connector(connector);
303 struct intel_dp *intel_dp = intel_connector->mst_port;
308 return intel_connector_update_modes(connector, NULL);
311 edid = drm_dp_mst_get_edid(connector, &intel_dp->mst_mgr, intel_connector->port);
312 ret = intel_connector_update_modes(connector, edid);
318 static enum drm_connector_status
319 intel_dp_mst_detect(struct drm_connector *connector, bool force)
321 struct intel_connector *intel_connector = to_intel_connector(connector);
322 struct intel_dp *intel_dp = intel_connector->mst_port;
325 return connector_status_disconnected;
326 return drm_dp_mst_detect_port(connector, &intel_dp->mst_mgr, intel_connector->port);
330 intel_dp_mst_connector_destroy(struct drm_connector *connector)
332 struct intel_connector *intel_connector = to_intel_connector(connector);
334 if (!IS_ERR_OR_NULL(intel_connector->edid))
335 kfree(intel_connector->edid);
337 drm_connector_cleanup(connector);
341 static const struct drm_connector_funcs intel_dp_mst_connector_funcs = {
342 .detect = intel_dp_mst_detect,
343 .fill_modes = drm_helper_probe_single_connector_modes,
344 .late_register = intel_connector_register,
345 .early_unregister = intel_connector_unregister,
346 .destroy = intel_dp_mst_connector_destroy,
347 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
348 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
351 static int intel_dp_mst_get_modes(struct drm_connector *connector)
353 return intel_dp_mst_get_ddc_modes(connector);
356 static enum drm_mode_status
357 intel_dp_mst_mode_valid(struct drm_connector *connector,
358 struct drm_display_mode *mode)
360 struct intel_connector *intel_connector = to_intel_connector(connector);
361 struct intel_dp *intel_dp = intel_connector->mst_port;
362 int max_dotclk = to_i915(connector->dev)->max_dotclk_freq;
363 int bpp = 24; /* MST uses fixed bpp */
364 int max_rate, mode_rate, max_lanes, max_link_clock;
369 max_link_clock = intel_dp_max_link_rate(intel_dp);
370 max_lanes = intel_dp_max_lane_count(intel_dp);
372 max_rate = intel_dp_max_data_rate(max_link_clock, max_lanes);
373 mode_rate = intel_dp_link_required(mode->clock, bpp);
375 /* TODO - validate mode against available PBN for link */
376 if (mode->clock < 10000)
377 return MODE_CLOCK_LOW;
379 if (mode->flags & DRM_MODE_FLAG_DBLCLK)
380 return MODE_H_ILLEGAL;
382 if (mode_rate > max_rate || mode->clock > max_dotclk)
383 return MODE_CLOCK_HIGH;
388 static struct drm_encoder *intel_mst_atomic_best_encoder(struct drm_connector *connector,
389 struct drm_connector_state *state)
391 struct intel_connector *intel_connector = to_intel_connector(connector);
392 struct intel_dp *intel_dp = intel_connector->mst_port;
393 struct intel_crtc *crtc = to_intel_crtc(state->crtc);
397 return &intel_dp->mst_encoders[crtc->pipe]->base.base;
400 static struct drm_encoder *intel_mst_best_encoder(struct drm_connector *connector)
402 struct intel_connector *intel_connector = to_intel_connector(connector);
403 struct intel_dp *intel_dp = intel_connector->mst_port;
406 return &intel_dp->mst_encoders[0]->base.base;
409 static const struct drm_connector_helper_funcs intel_dp_mst_connector_helper_funcs = {
410 .get_modes = intel_dp_mst_get_modes,
411 .mode_valid = intel_dp_mst_mode_valid,
412 .atomic_best_encoder = intel_mst_atomic_best_encoder,
413 .best_encoder = intel_mst_best_encoder,
414 .atomic_check = intel_dp_mst_atomic_check,
417 static void intel_dp_mst_encoder_destroy(struct drm_encoder *encoder)
419 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
421 drm_encoder_cleanup(encoder);
425 static const struct drm_encoder_funcs intel_dp_mst_enc_funcs = {
426 .destroy = intel_dp_mst_encoder_destroy,
429 static bool intel_dp_mst_get_hw_state(struct intel_connector *connector)
431 if (connector->encoder && connector->base.state->crtc) {
433 if (!connector->encoder->get_hw_state(connector->encoder, &pipe))
440 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)
442 struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr);
443 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
444 struct drm_device *dev = intel_dig_port->base.base.dev;
445 struct drm_i915_private *dev_priv = to_i915(dev);
446 struct intel_connector *intel_connector;
447 struct drm_connector *connector;
451 intel_connector = intel_connector_alloc();
452 if (!intel_connector)
455 connector = &intel_connector->base;
456 ret = drm_connector_init(dev, connector, &intel_dp_mst_connector_funcs,
457 DRM_MODE_CONNECTOR_DisplayPort);
459 intel_connector_free(intel_connector);
463 drm_connector_helper_add(connector, &intel_dp_mst_connector_helper_funcs);
465 intel_connector->get_hw_state = intel_dp_mst_get_hw_state;
466 intel_connector->mst_port = intel_dp;
467 intel_connector->port = port;
469 for_each_pipe(dev_priv, pipe) {
470 struct drm_encoder *enc =
471 &intel_dp->mst_encoders[pipe]->base.base;
473 ret = drm_mode_connector_attach_encoder(&intel_connector->base,
479 drm_object_attach_property(&connector->base, dev->mode_config.path_property, 0);
480 drm_object_attach_property(&connector->base, dev->mode_config.tile_property, 0);
482 ret = drm_mode_connector_set_path_property(connector, pathprop);
489 drm_connector_cleanup(connector);
493 static void intel_dp_register_mst_connector(struct drm_connector *connector)
495 struct drm_i915_private *dev_priv = to_i915(connector->dev);
498 drm_fb_helper_add_one_connector(&dev_priv->fbdev->helper,
501 drm_connector_register(connector);
504 static void intel_dp_destroy_mst_connector(struct drm_dp_mst_topology_mgr *mgr,
505 struct drm_connector *connector)
507 struct intel_connector *intel_connector = to_intel_connector(connector);
508 struct drm_i915_private *dev_priv = to_i915(connector->dev);
510 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", connector->base.id, connector->name);
511 drm_connector_unregister(connector);
514 drm_fb_helper_remove_one_connector(&dev_priv->fbdev->helper,
516 /* prevent race with the check in ->detect */
517 drm_modeset_lock(&connector->dev->mode_config.connection_mutex, NULL);
518 intel_connector->mst_port = NULL;
519 drm_modeset_unlock(&connector->dev->mode_config.connection_mutex);
521 drm_connector_unreference(connector);
524 static void intel_dp_mst_hotplug(struct drm_dp_mst_topology_mgr *mgr)
526 struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr);
527 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
528 struct drm_device *dev = intel_dig_port->base.base.dev;
530 drm_kms_helper_hotplug_event(dev);
533 static const struct drm_dp_mst_topology_cbs mst_cbs = {
534 .add_connector = intel_dp_add_mst_connector,
535 .register_connector = intel_dp_register_mst_connector,
536 .destroy_connector = intel_dp_destroy_mst_connector,
537 .hotplug = intel_dp_mst_hotplug,
540 static struct intel_dp_mst_encoder *
541 intel_dp_create_fake_mst_encoder(struct intel_digital_port *intel_dig_port, enum pipe pipe)
543 struct intel_dp_mst_encoder *intel_mst;
544 struct intel_encoder *intel_encoder;
545 struct drm_device *dev = intel_dig_port->base.base.dev;
547 intel_mst = kzalloc(sizeof(*intel_mst), GFP_KERNEL);
552 intel_mst->pipe = pipe;
553 intel_encoder = &intel_mst->base;
554 intel_mst->primary = intel_dig_port;
556 drm_encoder_init(dev, &intel_encoder->base, &intel_dp_mst_enc_funcs,
557 DRM_MODE_ENCODER_DPMST, "DP-MST %c", pipe_name(pipe));
559 intel_encoder->type = INTEL_OUTPUT_DP_MST;
560 intel_encoder->power_domain = intel_dig_port->base.power_domain;
561 intel_encoder->port = intel_dig_port->base.port;
562 intel_encoder->crtc_mask = 0x7;
563 intel_encoder->cloneable = 0;
565 intel_encoder->compute_config = intel_dp_mst_compute_config;
566 intel_encoder->disable = intel_mst_disable_dp;
567 intel_encoder->post_disable = intel_mst_post_disable_dp;
568 intel_encoder->pre_pll_enable = intel_mst_pre_pll_enable_dp;
569 intel_encoder->pre_enable = intel_mst_pre_enable_dp;
570 intel_encoder->enable = intel_mst_enable_dp;
571 intel_encoder->get_hw_state = intel_dp_mst_enc_get_hw_state;
572 intel_encoder->get_config = intel_dp_mst_enc_get_config;
579 intel_dp_create_fake_mst_encoders(struct intel_digital_port *intel_dig_port)
581 struct intel_dp *intel_dp = &intel_dig_port->dp;
582 struct drm_i915_private *dev_priv = to_i915(intel_dig_port->base.base.dev);
585 for_each_pipe(dev_priv, pipe)
586 intel_dp->mst_encoders[pipe] = intel_dp_create_fake_mst_encoder(intel_dig_port, pipe);
591 intel_dp_mst_encoder_init(struct intel_digital_port *intel_dig_port, int conn_base_id)
593 struct intel_dp *intel_dp = &intel_dig_port->dp;
594 struct drm_device *dev = intel_dig_port->base.base.dev;
597 intel_dp->can_mst = true;
598 intel_dp->mst_mgr.cbs = &mst_cbs;
600 /* create encoders */
601 intel_dp_create_fake_mst_encoders(intel_dig_port);
602 ret = drm_dp_mst_topology_mgr_init(&intel_dp->mst_mgr, dev,
603 &intel_dp->aux, 16, 3, conn_base_id);
605 intel_dp->can_mst = false;
612 intel_dp_mst_encoder_cleanup(struct intel_digital_port *intel_dig_port)
614 struct intel_dp *intel_dp = &intel_dig_port->dp;
616 if (!intel_dp->can_mst)
619 drm_dp_mst_topology_mgr_destroy(&intel_dp->mst_mgr);
620 /* encoders will get killed by normal cleanup */