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, rate;
43 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);
59 rate = intel_dp_max_link_rate(intel_dp);
61 if (intel_dp->num_sink_rates) {
62 intel_dp->link_bw = 0;
63 intel_dp->rate_select = intel_dp_rate_select(intel_dp, rate);
65 intel_dp->link_bw = drm_dp_link_rate_to_bw_code(rate);
66 intel_dp->rate_select = 0;
69 intel_dp->lane_count = lane_count;
71 pipe_config->pipe_bpp = 24;
72 pipe_config->port_clock = rate;
74 state = pipe_config->base.state;
76 for_each_connector_in_state(state, drm_connector, connector_state, i) {
77 connector = to_intel_connector(drm_connector);
79 if (connector_state->best_encoder == &encoder->base) {
86 DRM_ERROR("can't find connector\n");
90 mst_pbn = drm_dp_calc_pbn_mode(adjusted_mode->clock, bpp);
92 pipe_config->pbn = mst_pbn;
93 slots = drm_dp_find_vcpi_slots(&intel_dp->mst_mgr, mst_pbn);
95 intel_link_compute_m_n(bpp, lane_count,
96 adjusted_mode->crtc_clock,
97 pipe_config->port_clock,
98 &pipe_config->dp_m_n);
100 pipe_config->dp_m_n.tu = slots;
102 if (IS_HASWELL(dev) || IS_BROADWELL(dev))
103 hsw_dp_set_ddi_pll_sel(pipe_config);
109 static void intel_mst_disable_dp(struct intel_encoder *encoder)
111 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
112 struct intel_digital_port *intel_dig_port = intel_mst->primary;
113 struct intel_dp *intel_dp = &intel_dig_port->dp;
116 DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
118 drm_dp_mst_reset_vcpi_slots(&intel_dp->mst_mgr, intel_mst->port);
120 ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
122 DRM_ERROR("failed to update payload %d\n", ret);
126 static void intel_mst_post_disable_dp(struct intel_encoder *encoder)
128 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
129 struct intel_digital_port *intel_dig_port = intel_mst->primary;
130 struct intel_dp *intel_dp = &intel_dig_port->dp;
132 DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
135 drm_dp_check_act_status(&intel_dp->mst_mgr);
136 /* and this can also fail */
137 drm_dp_update_payload_part2(&intel_dp->mst_mgr);
139 drm_dp_mst_deallocate_vcpi(&intel_dp->mst_mgr, intel_mst->port);
141 intel_dp->active_mst_links--;
142 intel_mst->port = NULL;
143 if (intel_dp->active_mst_links == 0) {
144 intel_dig_port->base.post_disable(&intel_dig_port->base);
145 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_OFF);
149 static void intel_mst_pre_enable_dp(struct intel_encoder *encoder)
151 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
152 struct intel_digital_port *intel_dig_port = intel_mst->primary;
153 struct intel_dp *intel_dp = &intel_dig_port->dp;
154 struct drm_device *dev = encoder->base.dev;
155 struct drm_i915_private *dev_priv = dev->dev_private;
156 enum port port = intel_dig_port->port;
159 struct intel_connector *found = NULL, *connector;
161 struct drm_crtc *crtc = encoder->base.crtc;
162 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
164 for_each_intel_connector(dev, connector) {
165 if (connector->base.state->best_encoder == &encoder->base) {
172 DRM_ERROR("can't find connector\n");
176 DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
177 intel_mst->port = found->port;
179 if (intel_dp->active_mst_links == 0) {
180 enum port port = intel_ddi_get_encoder_port(encoder);
182 /* FIXME: add support for SKL */
183 if (INTEL_INFO(dev)->gen < 9)
184 I915_WRITE(PORT_CLK_SEL(port),
185 intel_crtc->config->ddi_pll_sel);
187 intel_ddi_init_dp_buf_reg(&intel_dig_port->base);
189 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON);
192 intel_dp_start_link_train(intel_dp);
193 intel_dp_complete_link_train(intel_dp);
194 intel_dp_stop_link_train(intel_dp);
197 ret = drm_dp_mst_allocate_vcpi(&intel_dp->mst_mgr,
199 intel_crtc->config->pbn, &slots);
201 DRM_ERROR("failed to allocate vcpi\n");
206 intel_dp->active_mst_links++;
207 temp = I915_READ(DP_TP_STATUS(port));
208 I915_WRITE(DP_TP_STATUS(port), temp);
210 ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
213 static void intel_mst_enable_dp(struct intel_encoder *encoder)
215 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
216 struct intel_digital_port *intel_dig_port = intel_mst->primary;
217 struct intel_dp *intel_dp = &intel_dig_port->dp;
218 struct drm_device *dev = intel_dig_port->base.base.dev;
219 struct drm_i915_private *dev_priv = dev->dev_private;
220 enum port port = intel_dig_port->port;
223 DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
225 if (wait_for((I915_READ(DP_TP_STATUS(port)) & DP_TP_STATUS_ACT_SENT),
227 DRM_ERROR("Timed out waiting for ACT sent\n");
229 ret = drm_dp_check_act_status(&intel_dp->mst_mgr);
231 ret = drm_dp_update_payload_part2(&intel_dp->mst_mgr);
234 static bool intel_dp_mst_enc_get_hw_state(struct intel_encoder *encoder,
237 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
238 *pipe = intel_mst->pipe;
244 static void intel_dp_mst_enc_get_config(struct intel_encoder *encoder,
245 struct intel_crtc_state *pipe_config)
247 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
248 struct intel_digital_port *intel_dig_port = intel_mst->primary;
249 struct intel_crtc *crtc = to_intel_crtc(encoder->base.crtc);
250 struct drm_device *dev = encoder->base.dev;
251 struct drm_i915_private *dev_priv = dev->dev_private;
252 enum transcoder cpu_transcoder = pipe_config->cpu_transcoder;
255 pipe_config->has_dp_encoder = true;
257 temp = I915_READ(TRANS_DDI_FUNC_CTL(cpu_transcoder));
258 if (temp & TRANS_DDI_PHSYNC)
259 flags |= DRM_MODE_FLAG_PHSYNC;
261 flags |= DRM_MODE_FLAG_NHSYNC;
262 if (temp & TRANS_DDI_PVSYNC)
263 flags |= DRM_MODE_FLAG_PVSYNC;
265 flags |= DRM_MODE_FLAG_NVSYNC;
267 switch (temp & TRANS_DDI_BPC_MASK) {
268 case TRANS_DDI_BPC_6:
269 pipe_config->pipe_bpp = 18;
271 case TRANS_DDI_BPC_8:
272 pipe_config->pipe_bpp = 24;
274 case TRANS_DDI_BPC_10:
275 pipe_config->pipe_bpp = 30;
277 case TRANS_DDI_BPC_12:
278 pipe_config->pipe_bpp = 36;
283 pipe_config->base.adjusted_mode.flags |= flags;
284 intel_dp_get_m_n(crtc, pipe_config);
286 intel_ddi_clock_get(&intel_dig_port->base, pipe_config);
289 static int intel_dp_mst_get_ddc_modes(struct drm_connector *connector)
291 struct intel_connector *intel_connector = to_intel_connector(connector);
292 struct intel_dp *intel_dp = intel_connector->mst_port;
296 edid = drm_dp_mst_get_edid(connector, &intel_dp->mst_mgr, intel_connector->port);
300 ret = intel_connector_update_modes(connector, edid);
306 static enum drm_connector_status
307 intel_dp_mst_detect(struct drm_connector *connector, bool force)
309 struct intel_connector *intel_connector = to_intel_connector(connector);
310 struct intel_dp *intel_dp = intel_connector->mst_port;
312 return drm_dp_mst_detect_port(connector, &intel_dp->mst_mgr, intel_connector->port);
316 intel_dp_mst_set_property(struct drm_connector *connector,
317 struct drm_property *property,
324 intel_dp_mst_connector_destroy(struct drm_connector *connector)
326 struct intel_connector *intel_connector = to_intel_connector(connector);
328 if (!IS_ERR_OR_NULL(intel_connector->edid))
329 kfree(intel_connector->edid);
331 drm_connector_cleanup(connector);
335 static const struct drm_connector_funcs intel_dp_mst_connector_funcs = {
336 .dpms = drm_atomic_helper_connector_dpms,
337 .detect = intel_dp_mst_detect,
338 .fill_modes = drm_helper_probe_single_connector_modes,
339 .set_property = intel_dp_mst_set_property,
340 .atomic_get_property = intel_connector_atomic_get_property,
341 .destroy = intel_dp_mst_connector_destroy,
342 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
343 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
346 static int intel_dp_mst_get_modes(struct drm_connector *connector)
348 return intel_dp_mst_get_ddc_modes(connector);
351 static enum drm_mode_status
352 intel_dp_mst_mode_valid(struct drm_connector *connector,
353 struct drm_display_mode *mode)
355 /* TODO - validate mode against available PBN for link */
356 if (mode->clock < 10000)
357 return MODE_CLOCK_LOW;
359 if (mode->flags & DRM_MODE_FLAG_DBLCLK)
360 return MODE_H_ILLEGAL;
365 static struct drm_encoder *intel_mst_atomic_best_encoder(struct drm_connector *connector,
366 struct drm_connector_state *state)
368 struct intel_connector *intel_connector = to_intel_connector(connector);
369 struct intel_dp *intel_dp = intel_connector->mst_port;
370 struct intel_crtc *crtc = to_intel_crtc(state->crtc);
372 return &intel_dp->mst_encoders[crtc->pipe]->base.base;
375 static struct drm_encoder *intel_mst_best_encoder(struct drm_connector *connector)
377 struct intel_connector *intel_connector = to_intel_connector(connector);
378 struct intel_dp *intel_dp = intel_connector->mst_port;
379 return &intel_dp->mst_encoders[0]->base.base;
382 static const struct drm_connector_helper_funcs intel_dp_mst_connector_helper_funcs = {
383 .get_modes = intel_dp_mst_get_modes,
384 .mode_valid = intel_dp_mst_mode_valid,
385 .atomic_best_encoder = intel_mst_atomic_best_encoder,
386 .best_encoder = intel_mst_best_encoder,
389 static void intel_dp_mst_encoder_destroy(struct drm_encoder *encoder)
391 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
393 drm_encoder_cleanup(encoder);
397 static const struct drm_encoder_funcs intel_dp_mst_enc_funcs = {
398 .destroy = intel_dp_mst_encoder_destroy,
401 static bool intel_dp_mst_get_hw_state(struct intel_connector *connector)
403 if (connector->encoder) {
405 if (!connector->encoder->get_hw_state(connector->encoder, &pipe))
412 static void intel_connector_add_to_fbdev(struct intel_connector *connector)
414 #ifdef CONFIG_DRM_FBDEV_EMULATION
415 struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
416 drm_fb_helper_add_one_connector(&dev_priv->fbdev->helper, &connector->base);
420 static void intel_connector_remove_from_fbdev(struct intel_connector *connector)
422 #ifdef CONFIG_DRM_FBDEV_EMULATION
423 struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
424 drm_fb_helper_remove_one_connector(&dev_priv->fbdev->helper, &connector->base);
428 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)
430 struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr);
431 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
432 struct drm_device *dev = intel_dig_port->base.base.dev;
433 struct intel_connector *intel_connector;
434 struct drm_connector *connector;
437 intel_connector = intel_connector_alloc();
438 if (!intel_connector)
441 connector = &intel_connector->base;
442 drm_connector_init(dev, connector, &intel_dp_mst_connector_funcs, DRM_MODE_CONNECTOR_DisplayPort);
443 drm_connector_helper_add(connector, &intel_dp_mst_connector_helper_funcs);
445 intel_connector->unregister = intel_connector_unregister;
446 intel_connector->get_hw_state = intel_dp_mst_get_hw_state;
447 intel_connector->mst_port = intel_dp;
448 intel_connector->port = port;
450 for (i = PIPE_A; i <= PIPE_C; i++) {
451 drm_mode_connector_attach_encoder(&intel_connector->base,
452 &intel_dp->mst_encoders[i]->base.base);
454 intel_dp_add_properties(intel_dp, connector);
456 drm_object_attach_property(&connector->base, dev->mode_config.path_property, 0);
457 drm_object_attach_property(&connector->base, dev->mode_config.tile_property, 0);
459 drm_mode_connector_set_path_property(connector, pathprop);
460 drm_modeset_lock_all(dev);
461 intel_connector_add_to_fbdev(intel_connector);
462 drm_modeset_unlock_all(dev);
463 drm_connector_register(&intel_connector->base);
467 static void intel_dp_destroy_mst_connector(struct drm_dp_mst_topology_mgr *mgr,
468 struct drm_connector *connector)
470 struct intel_connector *intel_connector = to_intel_connector(connector);
471 struct drm_device *dev = connector->dev;
473 /* need to nuke the connector */
474 drm_modeset_lock_all(dev);
475 if (connector->state->crtc) {
476 struct drm_mode_set set;
479 memset(&set, 0, sizeof(set));
480 set.crtc = connector->state->crtc,
482 ret = drm_atomic_helper_set_config(&set);
484 WARN(ret, "Disabling mst crtc failed with %i\n", ret);
486 drm_modeset_unlock_all(dev);
488 intel_connector->unregister(intel_connector);
490 drm_modeset_lock_all(dev);
491 intel_connector_remove_from_fbdev(intel_connector);
492 drm_connector_cleanup(connector);
493 drm_modeset_unlock_all(dev);
495 kfree(intel_connector);
499 static void intel_dp_mst_hotplug(struct drm_dp_mst_topology_mgr *mgr)
501 struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr);
502 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
503 struct drm_device *dev = intel_dig_port->base.base.dev;
505 drm_kms_helper_hotplug_event(dev);
508 static struct drm_dp_mst_topology_cbs mst_cbs = {
509 .add_connector = intel_dp_add_mst_connector,
510 .destroy_connector = intel_dp_destroy_mst_connector,
511 .hotplug = intel_dp_mst_hotplug,
514 static struct intel_dp_mst_encoder *
515 intel_dp_create_fake_mst_encoder(struct intel_digital_port *intel_dig_port, enum pipe pipe)
517 struct intel_dp_mst_encoder *intel_mst;
518 struct intel_encoder *intel_encoder;
519 struct drm_device *dev = intel_dig_port->base.base.dev;
521 intel_mst = kzalloc(sizeof(*intel_mst), GFP_KERNEL);
526 intel_mst->pipe = pipe;
527 intel_encoder = &intel_mst->base;
528 intel_mst->primary = intel_dig_port;
530 drm_encoder_init(dev, &intel_encoder->base, &intel_dp_mst_enc_funcs,
531 DRM_MODE_ENCODER_DPMST);
533 intel_encoder->type = INTEL_OUTPUT_DP_MST;
534 intel_encoder->crtc_mask = 0x7;
535 intel_encoder->cloneable = 0;
537 intel_encoder->compute_config = intel_dp_mst_compute_config;
538 intel_encoder->disable = intel_mst_disable_dp;
539 intel_encoder->post_disable = intel_mst_post_disable_dp;
540 intel_encoder->pre_enable = intel_mst_pre_enable_dp;
541 intel_encoder->enable = intel_mst_enable_dp;
542 intel_encoder->get_hw_state = intel_dp_mst_enc_get_hw_state;
543 intel_encoder->get_config = intel_dp_mst_enc_get_config;
550 intel_dp_create_fake_mst_encoders(struct intel_digital_port *intel_dig_port)
553 struct intel_dp *intel_dp = &intel_dig_port->dp;
555 for (i = PIPE_A; i <= PIPE_C; i++)
556 intel_dp->mst_encoders[i] = intel_dp_create_fake_mst_encoder(intel_dig_port, i);
561 intel_dp_mst_encoder_init(struct intel_digital_port *intel_dig_port, int conn_base_id)
563 struct intel_dp *intel_dp = &intel_dig_port->dp;
564 struct drm_device *dev = intel_dig_port->base.base.dev;
567 intel_dp->can_mst = true;
568 intel_dp->mst_mgr.cbs = &mst_cbs;
570 /* create encoders */
571 intel_dp_create_fake_mst_encoders(intel_dig_port);
572 ret = drm_dp_mst_topology_mgr_init(&intel_dp->mst_mgr, dev->dev, &intel_dp->aux, 16, 3, conn_base_id);
574 intel_dp->can_mst = false;
581 intel_dp_mst_encoder_cleanup(struct intel_digital_port *intel_dig_port)
583 struct intel_dp *intel_dp = &intel_dig_port->dp;
585 if (!intel_dp->can_mst)
588 drm_dp_mst_topology_mgr_destroy(&intel_dp->mst_mgr);
589 /* encoders will get killed by normal cleanup */