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 drm_connector *connector = conn_state->connector;
42 void *port = to_intel_connector(connector)->port;
43 struct drm_atomic_state *state = pipe_config->base.state;
45 int lane_count, slots = 0;
46 const struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode;
48 bool constant_n = drm_dp_has_quirk(&intel_dp->desc,
49 DP_DPCD_QUIRK_CONSTANT_N);
51 if (adjusted_mode->flags & DRM_MODE_FLAG_DBLSCAN)
54 pipe_config->output_format = INTEL_OUTPUT_FORMAT_RGB;
55 pipe_config->has_pch_encoder = false;
57 if (intel_dp->compliance.test_data.bpc) {
58 bpp = intel_dp->compliance.test_data.bpc * 3;
59 DRM_DEBUG_KMS("Setting pipe bpp to %d\n",
63 * for MST we always configure max link bw - the spec doesn't
64 * seem to suggest we should do otherwise.
66 lane_count = intel_dp_max_lane_count(intel_dp);
68 pipe_config->lane_count = lane_count;
70 pipe_config->pipe_bpp = bpp;
72 pipe_config->port_clock = intel_dp_max_link_rate(intel_dp);
74 if (drm_dp_mst_port_has_audio(&intel_dp->mst_mgr, port))
75 pipe_config->has_audio = true;
77 mst_pbn = drm_dp_calc_pbn_mode(adjusted_mode->crtc_clock, bpp);
78 pipe_config->pbn = mst_pbn;
80 /* Zombie connectors can't have VCPI slots */
81 if (!drm_connector_is_unregistered(connector)) {
82 slots = drm_dp_atomic_find_vcpi_slots(state,
87 DRM_DEBUG_KMS("failed finding vcpi slots:%d\n",
93 intel_link_compute_m_n(bpp, lane_count,
94 adjusted_mode->crtc_clock,
95 pipe_config->port_clock,
99 pipe_config->dp_m_n.tu = slots;
101 if (IS_GEN9_LP(dev_priv))
102 pipe_config->lane_lat_optim_mask =
103 bxt_ddi_phy_calc_lane_lat_optim_mask(pipe_config->lane_count);
105 intel_ddi_compute_min_voltage_level(dev_priv, pipe_config);
110 static int intel_dp_mst_atomic_check(struct drm_connector *connector,
111 struct drm_connector_state *new_conn_state)
113 struct drm_atomic_state *state = new_conn_state->state;
114 struct drm_connector_state *old_conn_state;
115 struct drm_crtc *old_crtc;
116 struct drm_crtc_state *crtc_state;
119 old_conn_state = drm_atomic_get_old_connector_state(state, connector);
120 old_crtc = old_conn_state->crtc;
124 crtc_state = drm_atomic_get_new_crtc_state(state, old_crtc);
125 slots = to_intel_crtc_state(crtc_state)->dp_m_n.tu;
126 if (drm_atomic_crtc_needs_modeset(crtc_state) && slots > 0) {
127 struct drm_dp_mst_topology_mgr *mgr;
128 struct drm_encoder *old_encoder;
130 old_encoder = old_conn_state->best_encoder;
131 mgr = &enc_to_mst(old_encoder)->primary->dp.mst_mgr;
133 ret = drm_dp_atomic_release_vcpi_slots(state, mgr, slots);
135 DRM_DEBUG_KMS("failed releasing %d vcpi slots:%d\n", slots, ret);
137 to_intel_crtc_state(crtc_state)->dp_m_n.tu = 0;
142 static void intel_mst_disable_dp(struct intel_encoder *encoder,
143 const struct intel_crtc_state *old_crtc_state,
144 const struct drm_connector_state *old_conn_state)
146 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
147 struct intel_digital_port *intel_dig_port = intel_mst->primary;
148 struct intel_dp *intel_dp = &intel_dig_port->dp;
149 struct intel_connector *connector =
150 to_intel_connector(old_conn_state->connector);
153 DRM_DEBUG_KMS("active links %d\n", intel_dp->active_mst_links);
155 drm_dp_mst_reset_vcpi_slots(&intel_dp->mst_mgr, connector->port);
157 ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
159 DRM_ERROR("failed to update payload %d\n", ret);
161 if (old_crtc_state->has_audio)
162 intel_audio_codec_disable(encoder,
163 old_crtc_state, old_conn_state);
166 static void intel_mst_post_disable_dp(struct intel_encoder *encoder,
167 const struct intel_crtc_state *old_crtc_state,
168 const struct drm_connector_state *old_conn_state)
170 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
171 struct intel_digital_port *intel_dig_port = intel_mst->primary;
172 struct intel_dp *intel_dp = &intel_dig_port->dp;
173 struct intel_connector *connector =
174 to_intel_connector(old_conn_state->connector);
176 intel_ddi_disable_pipe_clock(old_crtc_state);
179 drm_dp_check_act_status(&intel_dp->mst_mgr);
180 /* and this can also fail */
181 drm_dp_update_payload_part2(&intel_dp->mst_mgr);
183 drm_dp_mst_deallocate_vcpi(&intel_dp->mst_mgr, connector->port);
186 * Power down mst path before disabling the port, otherwise we end
187 * up getting interrupts from the sink upon detecting link loss.
189 drm_dp_send_power_updown_phy(&intel_dp->mst_mgr, connector->port,
192 intel_dp->active_mst_links--;
194 intel_mst->connector = NULL;
195 if (intel_dp->active_mst_links == 0) {
196 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_OFF);
197 intel_dig_port->base.post_disable(&intel_dig_port->base,
198 old_crtc_state, NULL);
201 DRM_DEBUG_KMS("active links %d\n", intel_dp->active_mst_links);
204 static void intel_mst_pre_pll_enable_dp(struct intel_encoder *encoder,
205 const struct intel_crtc_state *pipe_config,
206 const struct drm_connector_state *conn_state)
208 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
209 struct intel_digital_port *intel_dig_port = intel_mst->primary;
210 struct intel_dp *intel_dp = &intel_dig_port->dp;
212 if (intel_dp->active_mst_links == 0)
213 intel_dig_port->base.pre_pll_enable(&intel_dig_port->base,
217 static void intel_mst_post_pll_disable_dp(struct intel_encoder *encoder,
218 const struct intel_crtc_state *old_crtc_state,
219 const struct drm_connector_state *old_conn_state)
221 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
222 struct intel_digital_port *intel_dig_port = intel_mst->primary;
223 struct intel_dp *intel_dp = &intel_dig_port->dp;
225 if (intel_dp->active_mst_links == 0)
226 intel_dig_port->base.post_pll_disable(&intel_dig_port->base,
231 static void intel_mst_pre_enable_dp(struct intel_encoder *encoder,
232 const struct intel_crtc_state *pipe_config,
233 const struct drm_connector_state *conn_state)
235 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
236 struct intel_digital_port *intel_dig_port = intel_mst->primary;
237 struct intel_dp *intel_dp = &intel_dig_port->dp;
238 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
239 enum port port = intel_dig_port->base.port;
240 struct intel_connector *connector =
241 to_intel_connector(conn_state->connector);
245 /* MST encoders are bound to a crtc, not to a connector,
246 * force the mapping here for get_hw_state.
248 connector->encoder = encoder;
249 intel_mst->connector = connector;
251 DRM_DEBUG_KMS("active links %d\n", intel_dp->active_mst_links);
253 if (intel_dp->active_mst_links == 0)
254 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON);
256 drm_dp_send_power_updown_phy(&intel_dp->mst_mgr, connector->port, true);
258 if (intel_dp->active_mst_links == 0)
259 intel_dig_port->base.pre_enable(&intel_dig_port->base,
262 ret = drm_dp_mst_allocate_vcpi(&intel_dp->mst_mgr,
265 pipe_config->dp_m_n.tu);
267 DRM_ERROR("failed to allocate vcpi\n");
269 intel_dp->active_mst_links++;
270 temp = I915_READ(DP_TP_STATUS(port));
271 I915_WRITE(DP_TP_STATUS(port), temp);
273 ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
275 intel_ddi_enable_pipe_clock(pipe_config);
278 static void intel_mst_enable_dp(struct intel_encoder *encoder,
279 const struct intel_crtc_state *pipe_config,
280 const struct drm_connector_state *conn_state)
282 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
283 struct intel_digital_port *intel_dig_port = intel_mst->primary;
284 struct intel_dp *intel_dp = &intel_dig_port->dp;
285 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
286 enum port port = intel_dig_port->base.port;
288 DRM_DEBUG_KMS("active links %d\n", intel_dp->active_mst_links);
290 if (intel_wait_for_register(dev_priv,
292 DP_TP_STATUS_ACT_SENT,
293 DP_TP_STATUS_ACT_SENT,
295 DRM_ERROR("Timed out waiting for ACT sent\n");
297 drm_dp_check_act_status(&intel_dp->mst_mgr);
299 drm_dp_update_payload_part2(&intel_dp->mst_mgr);
300 if (pipe_config->has_audio)
301 intel_audio_codec_enable(encoder, pipe_config, conn_state);
304 static bool intel_dp_mst_enc_get_hw_state(struct intel_encoder *encoder,
307 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
308 *pipe = intel_mst->pipe;
309 if (intel_mst->connector)
314 static void intel_dp_mst_enc_get_config(struct intel_encoder *encoder,
315 struct intel_crtc_state *pipe_config)
317 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
318 struct intel_digital_port *intel_dig_port = intel_mst->primary;
320 intel_ddi_get_config(&intel_dig_port->base, pipe_config);
323 static int intel_dp_mst_get_ddc_modes(struct drm_connector *connector)
325 struct intel_connector *intel_connector = to_intel_connector(connector);
326 struct intel_dp *intel_dp = intel_connector->mst_port;
330 if (drm_connector_is_unregistered(connector))
331 return intel_connector_update_modes(connector, NULL);
333 edid = drm_dp_mst_get_edid(connector, &intel_dp->mst_mgr, intel_connector->port);
334 ret = intel_connector_update_modes(connector, edid);
340 static enum drm_connector_status
341 intel_dp_mst_detect(struct drm_connector *connector, bool force)
343 struct intel_connector *intel_connector = to_intel_connector(connector);
344 struct intel_dp *intel_dp = intel_connector->mst_port;
346 if (drm_connector_is_unregistered(connector))
347 return connector_status_disconnected;
348 return drm_dp_mst_detect_port(connector, &intel_dp->mst_mgr,
349 intel_connector->port);
352 static const struct drm_connector_funcs intel_dp_mst_connector_funcs = {
353 .detect = intel_dp_mst_detect,
354 .fill_modes = drm_helper_probe_single_connector_modes,
355 .late_register = intel_connector_register,
356 .early_unregister = intel_connector_unregister,
357 .destroy = intel_connector_destroy,
358 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
359 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
362 static int intel_dp_mst_get_modes(struct drm_connector *connector)
364 return intel_dp_mst_get_ddc_modes(connector);
367 static enum drm_mode_status
368 intel_dp_mst_mode_valid(struct drm_connector *connector,
369 struct drm_display_mode *mode)
371 struct intel_connector *intel_connector = to_intel_connector(connector);
372 struct intel_dp *intel_dp = intel_connector->mst_port;
373 int max_dotclk = to_i915(connector->dev)->max_dotclk_freq;
374 int bpp = 24; /* MST uses fixed bpp */
375 int max_rate, mode_rate, max_lanes, max_link_clock;
377 if (drm_connector_is_unregistered(connector))
380 if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
381 return MODE_NO_DBLESCAN;
383 max_link_clock = intel_dp_max_link_rate(intel_dp);
384 max_lanes = intel_dp_max_lane_count(intel_dp);
386 max_rate = intel_dp_max_data_rate(max_link_clock, max_lanes);
387 mode_rate = intel_dp_link_required(mode->clock, bpp);
389 /* TODO - validate mode against available PBN for link */
390 if (mode->clock < 10000)
391 return MODE_CLOCK_LOW;
393 if (mode->flags & DRM_MODE_FLAG_DBLCLK)
394 return MODE_H_ILLEGAL;
396 if (mode_rate > max_rate || mode->clock > max_dotclk)
397 return MODE_CLOCK_HIGH;
402 static struct drm_encoder *intel_mst_atomic_best_encoder(struct drm_connector *connector,
403 struct drm_connector_state *state)
405 struct intel_connector *intel_connector = to_intel_connector(connector);
406 struct intel_dp *intel_dp = intel_connector->mst_port;
407 struct intel_crtc *crtc = to_intel_crtc(state->crtc);
409 return &intel_dp->mst_encoders[crtc->pipe]->base.base;
412 static const struct drm_connector_helper_funcs intel_dp_mst_connector_helper_funcs = {
413 .get_modes = intel_dp_mst_get_modes,
414 .mode_valid = intel_dp_mst_mode_valid,
415 .atomic_best_encoder = intel_mst_atomic_best_encoder,
416 .atomic_check = intel_dp_mst_atomic_check,
419 static void intel_dp_mst_encoder_destroy(struct drm_encoder *encoder)
421 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
423 drm_encoder_cleanup(encoder);
427 static const struct drm_encoder_funcs intel_dp_mst_enc_funcs = {
428 .destroy = intel_dp_mst_encoder_destroy,
431 static bool intel_dp_mst_get_hw_state(struct intel_connector *connector)
433 if (connector->encoder && connector->base.state->crtc) {
435 if (!connector->encoder->get_hw_state(connector->encoder, &pipe))
442 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)
444 struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr);
445 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
446 struct drm_device *dev = intel_dig_port->base.base.dev;
447 struct drm_i915_private *dev_priv = to_i915(dev);
448 struct intel_connector *intel_connector;
449 struct drm_connector *connector;
453 intel_connector = intel_connector_alloc();
454 if (!intel_connector)
457 intel_connector->get_hw_state = intel_dp_mst_get_hw_state;
458 intel_connector->mst_port = intel_dp;
459 intel_connector->port = port;
461 connector = &intel_connector->base;
462 ret = drm_connector_init(dev, connector, &intel_dp_mst_connector_funcs,
463 DRM_MODE_CONNECTOR_DisplayPort);
465 intel_connector_free(intel_connector);
469 drm_connector_helper_add(connector, &intel_dp_mst_connector_helper_funcs);
471 for_each_pipe(dev_priv, pipe) {
472 struct drm_encoder *enc =
473 &intel_dp->mst_encoders[pipe]->base.base;
475 ret = drm_connector_attach_encoder(&intel_connector->base, enc);
480 drm_object_attach_property(&connector->base, dev->mode_config.path_property, 0);
481 drm_object_attach_property(&connector->base, dev->mode_config.tile_property, 0);
483 ret = drm_connector_set_path_property(connector, pathprop);
490 drm_connector_cleanup(connector);
494 static void intel_dp_register_mst_connector(struct drm_connector *connector)
496 struct drm_i915_private *dev_priv = to_i915(connector->dev);
499 drm_fb_helper_add_one_connector(&dev_priv->fbdev->helper,
502 drm_connector_register(connector);
505 static void intel_dp_destroy_mst_connector(struct drm_dp_mst_topology_mgr *mgr,
506 struct drm_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,
517 drm_connector_put(connector);
520 static void intel_dp_mst_hotplug(struct drm_dp_mst_topology_mgr *mgr)
522 struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr);
523 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
524 struct drm_device *dev = intel_dig_port->base.base.dev;
526 drm_kms_helper_hotplug_event(dev);
529 static const struct drm_dp_mst_topology_cbs mst_cbs = {
530 .add_connector = intel_dp_add_mst_connector,
531 .register_connector = intel_dp_register_mst_connector,
532 .destroy_connector = intel_dp_destroy_mst_connector,
533 .hotplug = intel_dp_mst_hotplug,
536 static struct intel_dp_mst_encoder *
537 intel_dp_create_fake_mst_encoder(struct intel_digital_port *intel_dig_port, enum pipe pipe)
539 struct intel_dp_mst_encoder *intel_mst;
540 struct intel_encoder *intel_encoder;
541 struct drm_device *dev = intel_dig_port->base.base.dev;
543 intel_mst = kzalloc(sizeof(*intel_mst), GFP_KERNEL);
548 intel_mst->pipe = pipe;
549 intel_encoder = &intel_mst->base;
550 intel_mst->primary = intel_dig_port;
552 drm_encoder_init(dev, &intel_encoder->base, &intel_dp_mst_enc_funcs,
553 DRM_MODE_ENCODER_DPMST, "DP-MST %c", pipe_name(pipe));
555 intel_encoder->type = INTEL_OUTPUT_DP_MST;
556 intel_encoder->power_domain = intel_dig_port->base.power_domain;
557 intel_encoder->port = intel_dig_port->base.port;
558 intel_encoder->crtc_mask = 0x7;
559 intel_encoder->cloneable = 0;
561 intel_encoder->compute_config = intel_dp_mst_compute_config;
562 intel_encoder->disable = intel_mst_disable_dp;
563 intel_encoder->post_disable = intel_mst_post_disable_dp;
564 intel_encoder->pre_pll_enable = intel_mst_pre_pll_enable_dp;
565 intel_encoder->post_pll_disable = intel_mst_post_pll_disable_dp;
566 intel_encoder->pre_enable = intel_mst_pre_enable_dp;
567 intel_encoder->enable = intel_mst_enable_dp;
568 intel_encoder->get_hw_state = intel_dp_mst_enc_get_hw_state;
569 intel_encoder->get_config = intel_dp_mst_enc_get_config;
576 intel_dp_create_fake_mst_encoders(struct intel_digital_port *intel_dig_port)
578 struct intel_dp *intel_dp = &intel_dig_port->dp;
579 struct drm_i915_private *dev_priv = to_i915(intel_dig_port->base.base.dev);
582 for_each_pipe(dev_priv, pipe)
583 intel_dp->mst_encoders[pipe] = intel_dp_create_fake_mst_encoder(intel_dig_port, pipe);
588 intel_dp_mst_encoder_init(struct intel_digital_port *intel_dig_port, int conn_base_id)
590 struct intel_dp *intel_dp = &intel_dig_port->dp;
591 struct drm_device *dev = intel_dig_port->base.base.dev;
594 intel_dp->can_mst = true;
595 intel_dp->mst_mgr.cbs = &mst_cbs;
597 /* create encoders */
598 intel_dp_create_fake_mst_encoders(intel_dig_port);
599 ret = drm_dp_mst_topology_mgr_init(&intel_dp->mst_mgr, dev,
600 &intel_dp->aux, 16, 3, conn_base_id);
602 intel_dp->can_mst = false;
609 intel_dp_mst_encoder_cleanup(struct intel_digital_port *intel_dig_port)
611 struct intel_dp *intel_dp = &intel_dig_port->dp;
613 if (!intel_dp->can_mst)
616 drm_dp_mst_topology_mgr_destroy(&intel_dp->mst_mgr);
617 /* encoders will get killed by normal cleanup */