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)
36 struct drm_device *dev = encoder->base.dev;
37 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
38 struct intel_digital_port *intel_dig_port = intel_mst->primary;
39 struct intel_dp *intel_dp = &intel_dig_port->dp;
40 struct drm_atomic_state *state;
42 int lane_count, slots;
43 const struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode;
44 struct drm_connector *drm_connector;
45 struct intel_connector *connector, *found = NULL;
46 struct drm_connector_state *connector_state;
49 pipe_config->dp_encoder_is_mst = true;
50 pipe_config->has_pch_encoder = false;
51 pipe_config->has_dp_encoder = true;
54 * for MST we always configure max link bw - the spec doesn't
55 * seem to suggest we should do otherwise.
57 lane_count = drm_dp_max_lane_count(intel_dp->dpcd);
60 pipe_config->lane_count = lane_count;
62 pipe_config->pipe_bpp = 24;
63 pipe_config->port_clock = intel_dp_max_link_rate(intel_dp);
65 state = pipe_config->base.state;
67 for_each_connector_in_state(state, drm_connector, connector_state, i) {
68 connector = to_intel_connector(drm_connector);
70 if (connector_state->best_encoder == &encoder->base) {
77 DRM_ERROR("can't find connector\n");
81 if (drm_dp_mst_port_has_audio(&intel_dp->mst_mgr, found->port))
82 pipe_config->has_audio = true;
83 mst_pbn = drm_dp_calc_pbn_mode(adjusted_mode->crtc_clock, bpp);
85 pipe_config->pbn = mst_pbn;
86 slots = drm_dp_find_vcpi_slots(&intel_dp->mst_mgr, mst_pbn);
88 intel_link_compute_m_n(bpp, lane_count,
89 adjusted_mode->crtc_clock,
90 pipe_config->port_clock,
91 &pipe_config->dp_m_n);
93 pipe_config->dp_m_n.tu = slots;
95 if (IS_HASWELL(dev) || IS_BROADWELL(dev))
96 hsw_dp_set_ddi_pll_sel(pipe_config);
102 static void intel_mst_disable_dp(struct intel_encoder *encoder)
104 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
105 struct intel_digital_port *intel_dig_port = intel_mst->primary;
106 struct intel_dp *intel_dp = &intel_dig_port->dp;
107 struct drm_device *dev = encoder->base.dev;
108 struct drm_i915_private *dev_priv = dev->dev_private;
109 struct drm_crtc *crtc = encoder->base.crtc;
110 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
114 DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
116 drm_dp_mst_reset_vcpi_slots(&intel_dp->mst_mgr, intel_mst->port);
118 ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
120 DRM_ERROR("failed to update payload %d\n", ret);
122 if (intel_crtc->config->has_audio) {
123 intel_audio_codec_disable(encoder);
124 intel_display_power_put(dev_priv, POWER_DOMAIN_AUDIO);
128 static void intel_mst_post_disable_dp(struct intel_encoder *encoder)
130 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
131 struct intel_digital_port *intel_dig_port = intel_mst->primary;
132 struct intel_dp *intel_dp = &intel_dig_port->dp;
134 DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
137 drm_dp_check_act_status(&intel_dp->mst_mgr);
138 /* and this can also fail */
139 drm_dp_update_payload_part2(&intel_dp->mst_mgr);
141 drm_dp_mst_deallocate_vcpi(&intel_dp->mst_mgr, intel_mst->port);
143 intel_dp->active_mst_links--;
144 intel_mst->port = NULL;
145 if (intel_dp->active_mst_links == 0) {
146 intel_dig_port->base.post_disable(&intel_dig_port->base);
147 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_OFF);
151 static void intel_mst_pre_enable_dp(struct intel_encoder *encoder)
153 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
154 struct intel_digital_port *intel_dig_port = intel_mst->primary;
155 struct intel_dp *intel_dp = &intel_dig_port->dp;
156 struct drm_device *dev = encoder->base.dev;
157 struct drm_i915_private *dev_priv = dev->dev_private;
158 enum port port = intel_dig_port->port;
161 struct intel_connector *found = NULL, *connector;
163 struct drm_crtc *crtc = encoder->base.crtc;
164 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
166 for_each_intel_connector(dev, connector) {
167 if (connector->base.state->best_encoder == &encoder->base) {
174 DRM_ERROR("can't find connector\n");
178 /* MST encoders are bound to a crtc, not to a connector,
179 * force the mapping here for get_hw_state.
181 found->encoder = encoder;
183 DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
184 intel_mst->port = found->port;
186 if (intel_dp->active_mst_links == 0) {
187 intel_prepare_ddi_buffer(&intel_dig_port->base);
189 intel_ddi_clk_select(&intel_dig_port->base, intel_crtc->config);
191 intel_dp_set_link_params(intel_dp, intel_crtc->config);
193 intel_ddi_init_dp_buf_reg(&intel_dig_port->base);
195 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON);
197 intel_dp_start_link_train(intel_dp);
198 intel_dp_stop_link_train(intel_dp);
201 ret = drm_dp_mst_allocate_vcpi(&intel_dp->mst_mgr,
203 intel_crtc->config->pbn, &slots);
205 DRM_ERROR("failed to allocate vcpi\n");
210 intel_dp->active_mst_links++;
211 temp = I915_READ(DP_TP_STATUS(port));
212 I915_WRITE(DP_TP_STATUS(port), temp);
214 ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
217 static void intel_mst_enable_dp(struct intel_encoder *encoder)
219 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
220 struct intel_digital_port *intel_dig_port = intel_mst->primary;
221 struct intel_dp *intel_dp = &intel_dig_port->dp;
222 struct drm_device *dev = intel_dig_port->base.base.dev;
223 struct drm_i915_private *dev_priv = dev->dev_private;
224 struct intel_crtc *crtc = to_intel_crtc(encoder->base.crtc);
225 enum port port = intel_dig_port->port;
228 DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
230 if (wait_for((I915_READ(DP_TP_STATUS(port)) & DP_TP_STATUS_ACT_SENT),
232 DRM_ERROR("Timed out waiting for ACT sent\n");
234 ret = drm_dp_check_act_status(&intel_dp->mst_mgr);
236 ret = drm_dp_update_payload_part2(&intel_dp->mst_mgr);
238 if (crtc->config->has_audio) {
239 DRM_DEBUG_DRIVER("Enabling DP audio on pipe %c\n",
240 pipe_name(crtc->pipe));
241 intel_display_power_get(dev_priv, POWER_DOMAIN_AUDIO);
242 intel_audio_codec_enable(encoder);
246 static bool intel_dp_mst_enc_get_hw_state(struct intel_encoder *encoder,
249 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
250 *pipe = intel_mst->pipe;
256 static void intel_dp_mst_enc_get_config(struct intel_encoder *encoder,
257 struct intel_crtc_state *pipe_config)
259 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
260 struct intel_digital_port *intel_dig_port = intel_mst->primary;
261 struct intel_crtc *crtc = to_intel_crtc(encoder->base.crtc);
262 struct drm_device *dev = encoder->base.dev;
263 struct drm_i915_private *dev_priv = dev->dev_private;
264 enum transcoder cpu_transcoder = pipe_config->cpu_transcoder;
267 pipe_config->has_dp_encoder = true;
269 pipe_config->has_audio =
270 intel_ddi_is_audio_enabled(dev_priv, crtc);
272 temp = I915_READ(TRANS_DDI_FUNC_CTL(cpu_transcoder));
273 if (temp & TRANS_DDI_PHSYNC)
274 flags |= DRM_MODE_FLAG_PHSYNC;
276 flags |= DRM_MODE_FLAG_NHSYNC;
277 if (temp & TRANS_DDI_PVSYNC)
278 flags |= DRM_MODE_FLAG_PVSYNC;
280 flags |= DRM_MODE_FLAG_NVSYNC;
282 switch (temp & TRANS_DDI_BPC_MASK) {
283 case TRANS_DDI_BPC_6:
284 pipe_config->pipe_bpp = 18;
286 case TRANS_DDI_BPC_8:
287 pipe_config->pipe_bpp = 24;
289 case TRANS_DDI_BPC_10:
290 pipe_config->pipe_bpp = 30;
292 case TRANS_DDI_BPC_12:
293 pipe_config->pipe_bpp = 36;
298 pipe_config->base.adjusted_mode.flags |= flags;
300 pipe_config->lane_count =
301 ((temp & DDI_PORT_WIDTH_MASK) >> DDI_PORT_WIDTH_SHIFT) + 1;
303 intel_dp_get_m_n(crtc, pipe_config);
305 intel_ddi_clock_get(&intel_dig_port->base, pipe_config);
308 static int intel_dp_mst_get_ddc_modes(struct drm_connector *connector)
310 struct intel_connector *intel_connector = to_intel_connector(connector);
311 struct intel_dp *intel_dp = intel_connector->mst_port;
315 edid = drm_dp_mst_get_edid(connector, &intel_dp->mst_mgr, intel_connector->port);
319 ret = intel_connector_update_modes(connector, edid);
325 static enum drm_connector_status
326 intel_dp_mst_detect(struct drm_connector *connector, bool force)
328 struct intel_connector *intel_connector = to_intel_connector(connector);
329 struct intel_dp *intel_dp = intel_connector->mst_port;
331 return drm_dp_mst_detect_port(connector, &intel_dp->mst_mgr, intel_connector->port);
335 intel_dp_mst_set_property(struct drm_connector *connector,
336 struct drm_property *property,
343 intel_dp_mst_connector_destroy(struct drm_connector *connector)
345 struct intel_connector *intel_connector = to_intel_connector(connector);
347 if (!IS_ERR_OR_NULL(intel_connector->edid))
348 kfree(intel_connector->edid);
350 drm_connector_cleanup(connector);
354 static const struct drm_connector_funcs intel_dp_mst_connector_funcs = {
355 .dpms = drm_atomic_helper_connector_dpms,
356 .detect = intel_dp_mst_detect,
357 .fill_modes = drm_helper_probe_single_connector_modes,
358 .set_property = intel_dp_mst_set_property,
359 .atomic_get_property = intel_connector_atomic_get_property,
360 .destroy = intel_dp_mst_connector_destroy,
361 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
362 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
365 static int intel_dp_mst_get_modes(struct drm_connector *connector)
367 return intel_dp_mst_get_ddc_modes(connector);
370 static enum drm_mode_status
371 intel_dp_mst_mode_valid(struct drm_connector *connector,
372 struct drm_display_mode *mode)
374 /* TODO - validate mode against available PBN for link */
375 if (mode->clock < 10000)
376 return MODE_CLOCK_LOW;
378 if (mode->flags & DRM_MODE_FLAG_DBLCLK)
379 return MODE_H_ILLEGAL;
384 static struct drm_encoder *intel_mst_atomic_best_encoder(struct drm_connector *connector,
385 struct drm_connector_state *state)
387 struct intel_connector *intel_connector = to_intel_connector(connector);
388 struct intel_dp *intel_dp = intel_connector->mst_port;
389 struct intel_crtc *crtc = to_intel_crtc(state->crtc);
391 return &intel_dp->mst_encoders[crtc->pipe]->base.base;
394 static struct drm_encoder *intel_mst_best_encoder(struct drm_connector *connector)
396 struct intel_connector *intel_connector = to_intel_connector(connector);
397 struct intel_dp *intel_dp = intel_connector->mst_port;
398 return &intel_dp->mst_encoders[0]->base.base;
401 static const struct drm_connector_helper_funcs intel_dp_mst_connector_helper_funcs = {
402 .get_modes = intel_dp_mst_get_modes,
403 .mode_valid = intel_dp_mst_mode_valid,
404 .atomic_best_encoder = intel_mst_atomic_best_encoder,
405 .best_encoder = intel_mst_best_encoder,
408 static void intel_dp_mst_encoder_destroy(struct drm_encoder *encoder)
410 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
412 drm_encoder_cleanup(encoder);
416 static const struct drm_encoder_funcs intel_dp_mst_enc_funcs = {
417 .destroy = intel_dp_mst_encoder_destroy,
420 static bool intel_dp_mst_get_hw_state(struct intel_connector *connector)
422 if (connector->encoder && connector->base.state->crtc) {
424 if (!connector->encoder->get_hw_state(connector->encoder, &pipe))
431 static void intel_connector_add_to_fbdev(struct intel_connector *connector)
433 #ifdef CONFIG_DRM_FBDEV_EMULATION
434 struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
437 drm_fb_helper_add_one_connector(&dev_priv->fbdev->helper,
442 static void intel_connector_remove_from_fbdev(struct intel_connector *connector)
444 #ifdef CONFIG_DRM_FBDEV_EMULATION
445 struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
448 drm_fb_helper_remove_one_connector(&dev_priv->fbdev->helper,
453 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)
455 struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr);
456 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
457 struct drm_device *dev = intel_dig_port->base.base.dev;
458 struct intel_connector *intel_connector;
459 struct drm_connector *connector;
462 intel_connector = intel_connector_alloc();
463 if (!intel_connector)
466 connector = &intel_connector->base;
467 drm_connector_init(dev, connector, &intel_dp_mst_connector_funcs, DRM_MODE_CONNECTOR_DisplayPort);
468 drm_connector_helper_add(connector, &intel_dp_mst_connector_helper_funcs);
470 intel_connector->unregister = intel_connector_unregister;
471 intel_connector->get_hw_state = intel_dp_mst_get_hw_state;
472 intel_connector->mst_port = intel_dp;
473 intel_connector->port = port;
475 for (i = PIPE_A; i <= PIPE_C; i++) {
476 drm_mode_connector_attach_encoder(&intel_connector->base,
477 &intel_dp->mst_encoders[i]->base.base);
479 intel_dp_add_properties(intel_dp, connector);
481 drm_object_attach_property(&connector->base, dev->mode_config.path_property, 0);
482 drm_object_attach_property(&connector->base, dev->mode_config.tile_property, 0);
484 drm_mode_connector_set_path_property(connector, pathprop);
488 static void intel_dp_register_mst_connector(struct drm_connector *connector)
490 struct intel_connector *intel_connector = to_intel_connector(connector);
491 struct drm_device *dev = connector->dev;
492 drm_modeset_lock_all(dev);
493 intel_connector_add_to_fbdev(intel_connector);
494 drm_modeset_unlock_all(dev);
495 drm_connector_register(&intel_connector->base);
498 static void intel_dp_destroy_mst_connector(struct drm_dp_mst_topology_mgr *mgr,
499 struct drm_connector *connector)
501 struct intel_connector *intel_connector = to_intel_connector(connector);
502 struct drm_device *dev = connector->dev;
504 /* need to nuke the connector */
505 drm_modeset_lock_all(dev);
506 if (connector->state->crtc) {
507 struct drm_mode_set set;
510 memset(&set, 0, sizeof(set));
511 set.crtc = connector->state->crtc,
513 ret = drm_atomic_helper_set_config(&set);
515 WARN(ret, "Disabling mst crtc failed with %i\n", ret);
517 drm_modeset_unlock_all(dev);
519 intel_connector->unregister(intel_connector);
521 drm_modeset_lock_all(dev);
522 intel_connector_remove_from_fbdev(intel_connector);
523 drm_connector_cleanup(connector);
524 drm_modeset_unlock_all(dev);
526 kfree(intel_connector);
530 static void intel_dp_mst_hotplug(struct drm_dp_mst_topology_mgr *mgr)
532 struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr);
533 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
534 struct drm_device *dev = intel_dig_port->base.base.dev;
536 drm_kms_helper_hotplug_event(dev);
539 static const struct drm_dp_mst_topology_cbs mst_cbs = {
540 .add_connector = intel_dp_add_mst_connector,
541 .register_connector = intel_dp_register_mst_connector,
542 .destroy_connector = intel_dp_destroy_mst_connector,
543 .hotplug = intel_dp_mst_hotplug,
546 static struct intel_dp_mst_encoder *
547 intel_dp_create_fake_mst_encoder(struct intel_digital_port *intel_dig_port, enum pipe pipe)
549 struct intel_dp_mst_encoder *intel_mst;
550 struct intel_encoder *intel_encoder;
551 struct drm_device *dev = intel_dig_port->base.base.dev;
553 intel_mst = kzalloc(sizeof(*intel_mst), GFP_KERNEL);
558 intel_mst->pipe = pipe;
559 intel_encoder = &intel_mst->base;
560 intel_mst->primary = intel_dig_port;
562 drm_encoder_init(dev, &intel_encoder->base, &intel_dp_mst_enc_funcs,
563 DRM_MODE_ENCODER_DPMST, NULL);
565 intel_encoder->type = INTEL_OUTPUT_DP_MST;
566 intel_encoder->crtc_mask = 0x7;
567 intel_encoder->cloneable = 0;
569 intel_encoder->compute_config = intel_dp_mst_compute_config;
570 intel_encoder->disable = intel_mst_disable_dp;
571 intel_encoder->post_disable = intel_mst_post_disable_dp;
572 intel_encoder->pre_enable = intel_mst_pre_enable_dp;
573 intel_encoder->enable = intel_mst_enable_dp;
574 intel_encoder->get_hw_state = intel_dp_mst_enc_get_hw_state;
575 intel_encoder->get_config = intel_dp_mst_enc_get_config;
582 intel_dp_create_fake_mst_encoders(struct intel_digital_port *intel_dig_port)
585 struct intel_dp *intel_dp = &intel_dig_port->dp;
587 for (i = PIPE_A; i <= PIPE_C; i++)
588 intel_dp->mst_encoders[i] = intel_dp_create_fake_mst_encoder(intel_dig_port, i);
593 intel_dp_mst_encoder_init(struct intel_digital_port *intel_dig_port, int conn_base_id)
595 struct intel_dp *intel_dp = &intel_dig_port->dp;
596 struct drm_device *dev = intel_dig_port->base.base.dev;
599 intel_dp->can_mst = true;
600 intel_dp->mst_mgr.cbs = &mst_cbs;
602 /* create encoders */
603 intel_dp_create_fake_mst_encoders(intel_dig_port);
604 ret = drm_dp_mst_topology_mgr_init(&intel_dp->mst_mgr, dev->dev, &intel_dp->aux, 16, 3, conn_base_id);
606 intel_dp->can_mst = false;
613 intel_dp_mst_encoder_cleanup(struct intel_digital_port *intel_dig_port)
615 struct intel_dp *intel_dp = &intel_dig_port->dp;
617 if (!intel_dp->can_mst)
620 drm_dp_mst_topology_mgr_destroy(&intel_dp->mst_mgr);
621 /* encoders will get killed by normal cleanup */