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 intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
37 struct intel_digital_port *intel_dig_port = intel_mst->primary;
38 struct intel_dp *intel_dp = &intel_dig_port->dp;
39 struct drm_atomic_state *state;
41 int lane_count, slots;
42 const struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode;
43 struct drm_connector *drm_connector;
44 struct intel_connector *connector, *found = NULL;
45 struct drm_connector_state *connector_state;
48 pipe_config->dp_encoder_is_mst = true;
49 pipe_config->has_pch_encoder = false;
50 pipe_config->has_dp_encoder = true;
53 * for MST we always configure max link bw - the spec doesn't
54 * seem to suggest we should do otherwise.
56 lane_count = drm_dp_max_lane_count(intel_dp->dpcd);
59 pipe_config->lane_count = lane_count;
61 pipe_config->pipe_bpp = 24;
62 pipe_config->port_clock = intel_dp_max_link_rate(intel_dp);
64 state = pipe_config->base.state;
66 for_each_connector_in_state(state, drm_connector, connector_state, i) {
67 connector = to_intel_connector(drm_connector);
69 if (connector_state->best_encoder == &encoder->base) {
76 DRM_ERROR("can't find connector\n");
80 mst_pbn = drm_dp_calc_pbn_mode(adjusted_mode->crtc_clock, bpp);
82 pipe_config->pbn = mst_pbn;
83 slots = drm_dp_find_vcpi_slots(&intel_dp->mst_mgr, mst_pbn);
85 intel_link_compute_m_n(bpp, lane_count,
86 adjusted_mode->crtc_clock,
87 pipe_config->port_clock,
88 &pipe_config->dp_m_n);
90 pipe_config->dp_m_n.tu = slots;
96 static void intel_mst_disable_dp(struct intel_encoder *encoder)
98 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
99 struct intel_digital_port *intel_dig_port = intel_mst->primary;
100 struct intel_dp *intel_dp = &intel_dig_port->dp;
103 DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
105 drm_dp_mst_reset_vcpi_slots(&intel_dp->mst_mgr, intel_mst->connector->port);
107 ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
109 DRM_ERROR("failed to update payload %d\n", ret);
113 static void intel_mst_post_disable_dp(struct intel_encoder *encoder)
115 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
116 struct intel_digital_port *intel_dig_port = intel_mst->primary;
117 struct intel_dp *intel_dp = &intel_dig_port->dp;
119 DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
122 drm_dp_check_act_status(&intel_dp->mst_mgr);
123 /* and this can also fail */
124 drm_dp_update_payload_part2(&intel_dp->mst_mgr);
126 drm_dp_mst_deallocate_vcpi(&intel_dp->mst_mgr, intel_mst->connector->port);
128 intel_dp->active_mst_links--;
130 intel_mst->connector = NULL;
131 if (intel_dp->active_mst_links == 0) {
132 intel_dig_port->base.post_disable(&intel_dig_port->base);
133 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_OFF);
137 static void intel_mst_pre_enable_dp(struct intel_encoder *encoder)
139 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
140 struct intel_digital_port *intel_dig_port = intel_mst->primary;
141 struct intel_dp *intel_dp = &intel_dig_port->dp;
142 struct drm_device *dev = encoder->base.dev;
143 struct drm_i915_private *dev_priv = dev->dev_private;
144 enum port port = intel_dig_port->port;
147 struct intel_connector *found = NULL, *connector;
149 struct drm_crtc *crtc = encoder->base.crtc;
150 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
152 for_each_intel_connector(dev, connector) {
153 if (connector->base.state->best_encoder == &encoder->base) {
160 DRM_ERROR("can't find connector\n");
164 /* MST encoders are bound to a crtc, not to a connector,
165 * force the mapping here for get_hw_state.
167 found->encoder = encoder;
169 DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
171 intel_mst->connector = found;
173 if (intel_dp->active_mst_links == 0) {
174 intel_prepare_ddi_buffer(&intel_dig_port->base);
176 intel_ddi_clk_select(&intel_dig_port->base, intel_crtc->config);
178 intel_dp_set_link_params(intel_dp, intel_crtc->config);
180 intel_ddi_init_dp_buf_reg(&intel_dig_port->base);
182 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON);
184 intel_dp_start_link_train(intel_dp);
185 intel_dp_stop_link_train(intel_dp);
188 ret = drm_dp_mst_allocate_vcpi(&intel_dp->mst_mgr,
189 intel_mst->connector->port,
190 intel_crtc->config->pbn, &slots);
192 DRM_ERROR("failed to allocate vcpi\n");
197 intel_dp->active_mst_links++;
198 temp = I915_READ(DP_TP_STATUS(port));
199 I915_WRITE(DP_TP_STATUS(port), temp);
201 ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
204 static void intel_mst_enable_dp(struct intel_encoder *encoder)
206 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
207 struct intel_digital_port *intel_dig_port = intel_mst->primary;
208 struct intel_dp *intel_dp = &intel_dig_port->dp;
209 struct drm_device *dev = intel_dig_port->base.base.dev;
210 struct drm_i915_private *dev_priv = dev->dev_private;
211 enum port port = intel_dig_port->port;
214 DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
216 if (wait_for((I915_READ(DP_TP_STATUS(port)) & DP_TP_STATUS_ACT_SENT),
218 DRM_ERROR("Timed out waiting for ACT sent\n");
220 ret = drm_dp_check_act_status(&intel_dp->mst_mgr);
222 ret = drm_dp_update_payload_part2(&intel_dp->mst_mgr);
225 static bool intel_dp_mst_enc_get_hw_state(struct intel_encoder *encoder,
228 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
229 *pipe = intel_mst->pipe;
230 if (intel_mst->connector)
235 static void intel_dp_mst_enc_get_config(struct intel_encoder *encoder,
236 struct intel_crtc_state *pipe_config)
238 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
239 struct intel_digital_port *intel_dig_port = intel_mst->primary;
240 struct intel_crtc *crtc = to_intel_crtc(encoder->base.crtc);
241 struct drm_device *dev = encoder->base.dev;
242 struct drm_i915_private *dev_priv = dev->dev_private;
243 enum transcoder cpu_transcoder = pipe_config->cpu_transcoder;
246 pipe_config->has_dp_encoder = true;
248 temp = I915_READ(TRANS_DDI_FUNC_CTL(cpu_transcoder));
249 if (temp & TRANS_DDI_PHSYNC)
250 flags |= DRM_MODE_FLAG_PHSYNC;
252 flags |= DRM_MODE_FLAG_NHSYNC;
253 if (temp & TRANS_DDI_PVSYNC)
254 flags |= DRM_MODE_FLAG_PVSYNC;
256 flags |= DRM_MODE_FLAG_NVSYNC;
258 switch (temp & TRANS_DDI_BPC_MASK) {
259 case TRANS_DDI_BPC_6:
260 pipe_config->pipe_bpp = 18;
262 case TRANS_DDI_BPC_8:
263 pipe_config->pipe_bpp = 24;
265 case TRANS_DDI_BPC_10:
266 pipe_config->pipe_bpp = 30;
268 case TRANS_DDI_BPC_12:
269 pipe_config->pipe_bpp = 36;
274 pipe_config->base.adjusted_mode.flags |= flags;
276 pipe_config->lane_count =
277 ((temp & DDI_PORT_WIDTH_MASK) >> DDI_PORT_WIDTH_SHIFT) + 1;
279 intel_dp_get_m_n(crtc, pipe_config);
281 intel_ddi_clock_get(&intel_dig_port->base, pipe_config);
284 static int intel_dp_mst_get_ddc_modes(struct drm_connector *connector)
286 struct intel_connector *intel_connector = to_intel_connector(connector);
287 struct intel_dp *intel_dp = intel_connector->mst_port;
292 return intel_connector_update_modes(connector, NULL);
295 edid = drm_dp_mst_get_edid(connector, &intel_dp->mst_mgr, intel_connector->port);
296 ret = intel_connector_update_modes(connector, edid);
302 static enum drm_connector_status
303 intel_dp_mst_detect(struct drm_connector *connector, bool force)
305 struct intel_connector *intel_connector = to_intel_connector(connector);
306 struct intel_dp *intel_dp = intel_connector->mst_port;
309 return connector_status_disconnected;
310 return drm_dp_mst_detect_port(connector, &intel_dp->mst_mgr, intel_connector->port);
314 intel_dp_mst_set_property(struct drm_connector *connector,
315 struct drm_property *property,
322 intel_dp_mst_connector_destroy(struct drm_connector *connector)
324 struct intel_connector *intel_connector = to_intel_connector(connector);
326 if (!IS_ERR_OR_NULL(intel_connector->edid))
327 kfree(intel_connector->edid);
329 drm_connector_cleanup(connector);
333 static const struct drm_connector_funcs intel_dp_mst_connector_funcs = {
334 .dpms = drm_atomic_helper_connector_dpms,
335 .detect = intel_dp_mst_detect,
336 .fill_modes = drm_helper_probe_single_connector_modes,
337 .set_property = intel_dp_mst_set_property,
338 .atomic_get_property = intel_connector_atomic_get_property,
339 .destroy = intel_dp_mst_connector_destroy,
340 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
341 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
344 static int intel_dp_mst_get_modes(struct drm_connector *connector)
346 return intel_dp_mst_get_ddc_modes(connector);
349 static enum drm_mode_status
350 intel_dp_mst_mode_valid(struct drm_connector *connector,
351 struct drm_display_mode *mode)
353 int max_dotclk = to_i915(connector->dev)->max_dotclk_freq;
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;
362 if (mode->clock > max_dotclk)
363 return MODE_CLOCK_HIGH;
368 static struct drm_encoder *intel_mst_atomic_best_encoder(struct drm_connector *connector,
369 struct drm_connector_state *state)
371 struct intel_connector *intel_connector = to_intel_connector(connector);
372 struct intel_dp *intel_dp = intel_connector->mst_port;
373 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;
386 return &intel_dp->mst_encoders[0]->base.base;
389 static const struct drm_connector_helper_funcs intel_dp_mst_connector_helper_funcs = {
390 .get_modes = intel_dp_mst_get_modes,
391 .mode_valid = intel_dp_mst_mode_valid,
392 .atomic_best_encoder = intel_mst_atomic_best_encoder,
393 .best_encoder = intel_mst_best_encoder,
396 static void intel_dp_mst_encoder_destroy(struct drm_encoder *encoder)
398 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
400 drm_encoder_cleanup(encoder);
404 static const struct drm_encoder_funcs intel_dp_mst_enc_funcs = {
405 .destroy = intel_dp_mst_encoder_destroy,
408 static bool intel_dp_mst_get_hw_state(struct intel_connector *connector)
410 if (connector->encoder && connector->base.state->crtc) {
412 if (!connector->encoder->get_hw_state(connector->encoder, &pipe))
419 static void intel_connector_add_to_fbdev(struct intel_connector *connector)
421 #ifdef CONFIG_DRM_FBDEV_EMULATION
422 struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
425 drm_fb_helper_add_one_connector(&dev_priv->fbdev->helper,
430 static void intel_connector_remove_from_fbdev(struct intel_connector *connector)
432 #ifdef CONFIG_DRM_FBDEV_EMULATION
433 struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
436 drm_fb_helper_remove_one_connector(&dev_priv->fbdev->helper,
441 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)
443 struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr);
444 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
445 struct drm_device *dev = intel_dig_port->base.base.dev;
446 struct intel_connector *intel_connector;
447 struct drm_connector *connector;
450 intel_connector = intel_connector_alloc();
451 if (!intel_connector)
454 connector = &intel_connector->base;
455 drm_connector_init(dev, connector, &intel_dp_mst_connector_funcs, DRM_MODE_CONNECTOR_DisplayPort);
456 drm_connector_helper_add(connector, &intel_dp_mst_connector_helper_funcs);
458 intel_connector->unregister = intel_connector_unregister;
459 intel_connector->get_hw_state = intel_dp_mst_get_hw_state;
460 intel_connector->mst_port = intel_dp;
461 intel_connector->port = port;
463 for (i = PIPE_A; i <= PIPE_C; i++) {
464 drm_mode_connector_attach_encoder(&intel_connector->base,
465 &intel_dp->mst_encoders[i]->base.base);
467 intel_dp_add_properties(intel_dp, connector);
469 drm_object_attach_property(&connector->base, dev->mode_config.path_property, 0);
470 drm_object_attach_property(&connector->base, dev->mode_config.tile_property, 0);
472 drm_mode_connector_set_path_property(connector, pathprop);
476 static void intel_dp_register_mst_connector(struct drm_connector *connector)
478 struct intel_connector *intel_connector = to_intel_connector(connector);
479 struct drm_device *dev = connector->dev;
480 drm_modeset_lock_all(dev);
481 intel_connector_add_to_fbdev(intel_connector);
482 drm_modeset_unlock_all(dev);
483 drm_connector_register(&intel_connector->base);
486 static void intel_dp_destroy_mst_connector(struct drm_dp_mst_topology_mgr *mgr,
487 struct drm_connector *connector)
489 struct intel_connector *intel_connector = to_intel_connector(connector);
490 struct drm_device *dev = connector->dev;
492 intel_connector->unregister(intel_connector);
494 /* need to nuke the connector */
495 drm_modeset_lock_all(dev);
496 intel_connector_remove_from_fbdev(intel_connector);
497 intel_connector->mst_port = NULL;
498 drm_modeset_unlock_all(dev);
500 drm_connector_unreference(&intel_connector->base);
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 const struct drm_dp_mst_topology_cbs mst_cbs = {
514 .add_connector = intel_dp_add_mst_connector,
515 .register_connector = intel_dp_register_mst_connector,
516 .destroy_connector = intel_dp_destroy_mst_connector,
517 .hotplug = intel_dp_mst_hotplug,
520 static struct intel_dp_mst_encoder *
521 intel_dp_create_fake_mst_encoder(struct intel_digital_port *intel_dig_port, enum pipe pipe)
523 struct intel_dp_mst_encoder *intel_mst;
524 struct intel_encoder *intel_encoder;
525 struct drm_device *dev = intel_dig_port->base.base.dev;
527 intel_mst = kzalloc(sizeof(*intel_mst), GFP_KERNEL);
532 intel_mst->pipe = pipe;
533 intel_encoder = &intel_mst->base;
534 intel_mst->primary = intel_dig_port;
536 drm_encoder_init(dev, &intel_encoder->base, &intel_dp_mst_enc_funcs,
537 DRM_MODE_ENCODER_DPMST, NULL);
539 intel_encoder->type = INTEL_OUTPUT_DP_MST;
540 intel_encoder->crtc_mask = 0x7;
541 intel_encoder->cloneable = 0;
543 intel_encoder->compute_config = intel_dp_mst_compute_config;
544 intel_encoder->disable = intel_mst_disable_dp;
545 intel_encoder->post_disable = intel_mst_post_disable_dp;
546 intel_encoder->pre_enable = intel_mst_pre_enable_dp;
547 intel_encoder->enable = intel_mst_enable_dp;
548 intel_encoder->get_hw_state = intel_dp_mst_enc_get_hw_state;
549 intel_encoder->get_config = intel_dp_mst_enc_get_config;
556 intel_dp_create_fake_mst_encoders(struct intel_digital_port *intel_dig_port)
559 struct intel_dp *intel_dp = &intel_dig_port->dp;
561 for (i = PIPE_A; i <= PIPE_C; i++)
562 intel_dp->mst_encoders[i] = intel_dp_create_fake_mst_encoder(intel_dig_port, i);
567 intel_dp_mst_encoder_init(struct intel_digital_port *intel_dig_port, int conn_base_id)
569 struct intel_dp *intel_dp = &intel_dig_port->dp;
570 struct drm_device *dev = intel_dig_port->base.base.dev;
573 intel_dp->can_mst = true;
574 intel_dp->mst_mgr.cbs = &mst_cbs;
576 /* create encoders */
577 intel_dp_create_fake_mst_encoders(intel_dig_port);
578 ret = drm_dp_mst_topology_mgr_init(&intel_dp->mst_mgr, dev->dev, &intel_dp->aux, 16, 3, conn_base_id);
580 intel_dp->can_mst = false;
587 intel_dp_mst_encoder_cleanup(struct intel_digital_port *intel_dig_port)
589 struct intel_dp *intel_dp = &intel_dig_port->dp;
591 if (!intel_dp->can_mst)
594 drm_dp_mst_topology_mgr_destroy(&intel_dp->mst_mgr);
595 /* encoders will get killed by normal cleanup */