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 /* MST encoders are bound to a crtc, not to a connector,
177 * force the mapping here for get_hw_state.
179 found->encoder = encoder;
181 DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
182 intel_mst->port = found->port;
184 if (intel_dp->active_mst_links == 0) {
185 enum port port = intel_ddi_get_encoder_port(encoder);
187 /* FIXME: add support for SKL */
188 if (INTEL_INFO(dev)->gen < 9)
189 I915_WRITE(PORT_CLK_SEL(port),
190 intel_crtc->config->ddi_pll_sel);
192 intel_ddi_init_dp_buf_reg(&intel_dig_port->base);
194 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON);
197 intel_dp_start_link_train(intel_dp);
198 intel_dp_complete_link_train(intel_dp);
199 intel_dp_stop_link_train(intel_dp);
202 ret = drm_dp_mst_allocate_vcpi(&intel_dp->mst_mgr,
204 intel_crtc->config->pbn, &slots);
206 DRM_ERROR("failed to allocate vcpi\n");
211 intel_dp->active_mst_links++;
212 temp = I915_READ(DP_TP_STATUS(port));
213 I915_WRITE(DP_TP_STATUS(port), temp);
215 ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
218 static void intel_mst_enable_dp(struct intel_encoder *encoder)
220 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
221 struct intel_digital_port *intel_dig_port = intel_mst->primary;
222 struct intel_dp *intel_dp = &intel_dig_port->dp;
223 struct drm_device *dev = intel_dig_port->base.base.dev;
224 struct drm_i915_private *dev_priv = dev->dev_private;
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);
239 static bool intel_dp_mst_enc_get_hw_state(struct intel_encoder *encoder,
242 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
243 *pipe = intel_mst->pipe;
249 static void intel_dp_mst_enc_get_config(struct intel_encoder *encoder,
250 struct intel_crtc_state *pipe_config)
252 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
253 struct intel_digital_port *intel_dig_port = intel_mst->primary;
254 struct intel_crtc *crtc = to_intel_crtc(encoder->base.crtc);
255 struct drm_device *dev = encoder->base.dev;
256 struct drm_i915_private *dev_priv = dev->dev_private;
257 enum transcoder cpu_transcoder = pipe_config->cpu_transcoder;
260 pipe_config->has_dp_encoder = true;
262 temp = I915_READ(TRANS_DDI_FUNC_CTL(cpu_transcoder));
263 if (temp & TRANS_DDI_PHSYNC)
264 flags |= DRM_MODE_FLAG_PHSYNC;
266 flags |= DRM_MODE_FLAG_NHSYNC;
267 if (temp & TRANS_DDI_PVSYNC)
268 flags |= DRM_MODE_FLAG_PVSYNC;
270 flags |= DRM_MODE_FLAG_NVSYNC;
272 switch (temp & TRANS_DDI_BPC_MASK) {
273 case TRANS_DDI_BPC_6:
274 pipe_config->pipe_bpp = 18;
276 case TRANS_DDI_BPC_8:
277 pipe_config->pipe_bpp = 24;
279 case TRANS_DDI_BPC_10:
280 pipe_config->pipe_bpp = 30;
282 case TRANS_DDI_BPC_12:
283 pipe_config->pipe_bpp = 36;
288 pipe_config->base.adjusted_mode.flags |= flags;
289 intel_dp_get_m_n(crtc, pipe_config);
291 intel_ddi_clock_get(&intel_dig_port->base, pipe_config);
294 static int intel_dp_mst_get_ddc_modes(struct drm_connector *connector)
296 struct intel_connector *intel_connector = to_intel_connector(connector);
297 struct intel_dp *intel_dp = intel_connector->mst_port;
301 edid = drm_dp_mst_get_edid(connector, &intel_dp->mst_mgr, intel_connector->port);
305 ret = intel_connector_update_modes(connector, edid);
311 static enum drm_connector_status
312 intel_dp_mst_detect(struct drm_connector *connector, bool force)
314 struct intel_connector *intel_connector = to_intel_connector(connector);
315 struct intel_dp *intel_dp = intel_connector->mst_port;
317 return drm_dp_mst_detect_port(connector, &intel_dp->mst_mgr, intel_connector->port);
321 intel_dp_mst_set_property(struct drm_connector *connector,
322 struct drm_property *property,
329 intel_dp_mst_connector_destroy(struct drm_connector *connector)
331 struct intel_connector *intel_connector = to_intel_connector(connector);
333 if (!IS_ERR_OR_NULL(intel_connector->edid))
334 kfree(intel_connector->edid);
336 drm_connector_cleanup(connector);
340 static const struct drm_connector_funcs intel_dp_mst_connector_funcs = {
341 .dpms = drm_atomic_helper_connector_dpms,
342 .detect = intel_dp_mst_detect,
343 .fill_modes = drm_helper_probe_single_connector_modes,
344 .set_property = intel_dp_mst_set_property,
345 .atomic_get_property = intel_connector_atomic_get_property,
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 /* TODO - validate mode against available PBN for link */
361 if (mode->clock < 10000)
362 return MODE_CLOCK_LOW;
364 if (mode->flags & DRM_MODE_FLAG_DBLCLK)
365 return MODE_H_ILLEGAL;
370 static struct drm_encoder *intel_mst_atomic_best_encoder(struct drm_connector *connector,
371 struct drm_connector_state *state)
373 struct intel_connector *intel_connector = to_intel_connector(connector);
374 struct intel_dp *intel_dp = intel_connector->mst_port;
375 struct intel_crtc *crtc = to_intel_crtc(state->crtc);
377 return &intel_dp->mst_encoders[crtc->pipe]->base.base;
380 static struct drm_encoder *intel_mst_best_encoder(struct drm_connector *connector)
382 struct intel_connector *intel_connector = to_intel_connector(connector);
383 struct intel_dp *intel_dp = intel_connector->mst_port;
384 return &intel_dp->mst_encoders[0]->base.base;
387 static const struct drm_connector_helper_funcs intel_dp_mst_connector_helper_funcs = {
388 .get_modes = intel_dp_mst_get_modes,
389 .mode_valid = intel_dp_mst_mode_valid,
390 .atomic_best_encoder = intel_mst_atomic_best_encoder,
391 .best_encoder = intel_mst_best_encoder,
394 static void intel_dp_mst_encoder_destroy(struct drm_encoder *encoder)
396 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
398 drm_encoder_cleanup(encoder);
402 static const struct drm_encoder_funcs intel_dp_mst_enc_funcs = {
403 .destroy = intel_dp_mst_encoder_destroy,
406 static bool intel_dp_mst_get_hw_state(struct intel_connector *connector)
408 if (connector->encoder && connector->base.state->crtc) {
410 if (!connector->encoder->get_hw_state(connector->encoder, &pipe))
417 static void intel_connector_add_to_fbdev(struct intel_connector *connector)
419 #ifdef CONFIG_DRM_FBDEV_EMULATION
420 struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
421 drm_fb_helper_add_one_connector(&dev_priv->fbdev->helper, &connector->base);
425 static void intel_connector_remove_from_fbdev(struct intel_connector *connector)
427 #ifdef CONFIG_DRM_FBDEV_EMULATION
428 struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
429 drm_fb_helper_remove_one_connector(&dev_priv->fbdev->helper, &connector->base);
433 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)
435 struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr);
436 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
437 struct drm_device *dev = intel_dig_port->base.base.dev;
438 struct intel_connector *intel_connector;
439 struct drm_connector *connector;
442 intel_connector = intel_connector_alloc();
443 if (!intel_connector)
446 connector = &intel_connector->base;
447 drm_connector_init(dev, connector, &intel_dp_mst_connector_funcs, DRM_MODE_CONNECTOR_DisplayPort);
448 drm_connector_helper_add(connector, &intel_dp_mst_connector_helper_funcs);
450 intel_connector->unregister = intel_connector_unregister;
451 intel_connector->get_hw_state = intel_dp_mst_get_hw_state;
452 intel_connector->mst_port = intel_dp;
453 intel_connector->port = port;
455 for (i = PIPE_A; i <= PIPE_C; i++) {
456 drm_mode_connector_attach_encoder(&intel_connector->base,
457 &intel_dp->mst_encoders[i]->base.base);
459 intel_dp_add_properties(intel_dp, connector);
461 drm_object_attach_property(&connector->base, dev->mode_config.path_property, 0);
462 drm_object_attach_property(&connector->base, dev->mode_config.tile_property, 0);
464 drm_mode_connector_set_path_property(connector, pathprop);
465 drm_modeset_lock_all(dev);
466 intel_connector_add_to_fbdev(intel_connector);
467 drm_modeset_unlock_all(dev);
468 drm_connector_register(&intel_connector->base);
472 static void intel_dp_destroy_mst_connector(struct drm_dp_mst_topology_mgr *mgr,
473 struct drm_connector *connector)
475 struct intel_connector *intel_connector = to_intel_connector(connector);
476 struct drm_device *dev = connector->dev;
478 /* need to nuke the connector */
479 drm_modeset_lock_all(dev);
480 if (connector->state->crtc) {
481 struct drm_mode_set set;
484 memset(&set, 0, sizeof(set));
485 set.crtc = connector->state->crtc,
487 ret = drm_atomic_helper_set_config(&set);
489 WARN(ret, "Disabling mst crtc failed with %i\n", ret);
491 drm_modeset_unlock_all(dev);
493 intel_connector->unregister(intel_connector);
495 drm_modeset_lock_all(dev);
496 intel_connector_remove_from_fbdev(intel_connector);
497 drm_connector_cleanup(connector);
498 drm_modeset_unlock_all(dev);
500 kfree(intel_connector);
504 static void intel_dp_mst_hotplug(struct drm_dp_mst_topology_mgr *mgr)
506 struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr);
507 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
508 struct drm_device *dev = intel_dig_port->base.base.dev;
510 drm_kms_helper_hotplug_event(dev);
513 static struct drm_dp_mst_topology_cbs mst_cbs = {
514 .add_connector = intel_dp_add_mst_connector,
515 .destroy_connector = intel_dp_destroy_mst_connector,
516 .hotplug = intel_dp_mst_hotplug,
519 static struct intel_dp_mst_encoder *
520 intel_dp_create_fake_mst_encoder(struct intel_digital_port *intel_dig_port, enum pipe pipe)
522 struct intel_dp_mst_encoder *intel_mst;
523 struct intel_encoder *intel_encoder;
524 struct drm_device *dev = intel_dig_port->base.base.dev;
526 intel_mst = kzalloc(sizeof(*intel_mst), GFP_KERNEL);
531 intel_mst->pipe = pipe;
532 intel_encoder = &intel_mst->base;
533 intel_mst->primary = intel_dig_port;
535 drm_encoder_init(dev, &intel_encoder->base, &intel_dp_mst_enc_funcs,
536 DRM_MODE_ENCODER_DPMST);
538 intel_encoder->type = INTEL_OUTPUT_DP_MST;
539 intel_encoder->crtc_mask = 0x7;
540 intel_encoder->cloneable = 0;
542 intel_encoder->compute_config = intel_dp_mst_compute_config;
543 intel_encoder->disable = intel_mst_disable_dp;
544 intel_encoder->post_disable = intel_mst_post_disable_dp;
545 intel_encoder->pre_enable = intel_mst_pre_enable_dp;
546 intel_encoder->enable = intel_mst_enable_dp;
547 intel_encoder->get_hw_state = intel_dp_mst_enc_get_hw_state;
548 intel_encoder->get_config = intel_dp_mst_enc_get_config;
555 intel_dp_create_fake_mst_encoders(struct intel_digital_port *intel_dig_port)
558 struct intel_dp *intel_dp = &intel_dig_port->dp;
560 for (i = PIPE_A; i <= PIPE_C; i++)
561 intel_dp->mst_encoders[i] = intel_dp_create_fake_mst_encoder(intel_dig_port, i);
566 intel_dp_mst_encoder_init(struct intel_digital_port *intel_dig_port, int conn_base_id)
568 struct intel_dp *intel_dp = &intel_dig_port->dp;
569 struct drm_device *dev = intel_dig_port->base.base.dev;
572 intel_dp->can_mst = true;
573 intel_dp->mst_mgr.cbs = &mst_cbs;
575 /* create encoders */
576 intel_dp_create_fake_mst_encoders(intel_dig_port);
577 ret = drm_dp_mst_topology_mgr_init(&intel_dp->mst_mgr, dev->dev, &intel_dp->aux, 16, 3, conn_base_id);
579 intel_dp->can_mst = false;
586 intel_dp_mst_encoder_cleanup(struct intel_digital_port *intel_dig_port)
588 struct intel_dp *intel_dp = &intel_dig_port->dp;
590 if (!intel_dp->can_mst)
593 drm_dp_mst_topology_mgr_destroy(&intel_dp->mst_mgr);
594 /* encoders will get killed by normal cleanup */