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 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 intel_connector *connector =
41 to_intel_connector(conn_state->connector);
42 struct drm_atomic_state *state;
44 int lane_count, slots;
45 const struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode;
47 bool reduce_m_n = drm_dp_has_quirk(&intel_dp->desc,
48 DP_DPCD_QUIRK_LIMITED_M_N);
50 pipe_config->has_pch_encoder = false;
52 if (intel_dp->compliance.test_data.bpc) {
53 bpp = intel_dp->compliance.test_data.bpc * 3;
54 DRM_DEBUG_KMS("Setting pipe bpp to %d\n",
58 * for MST we always configure max link bw - the spec doesn't
59 * seem to suggest we should do otherwise.
61 lane_count = drm_dp_max_lane_count(intel_dp->dpcd);
63 pipe_config->lane_count = lane_count;
65 pipe_config->pipe_bpp = bpp;
66 pipe_config->port_clock = intel_dp_max_link_rate(intel_dp);
68 state = pipe_config->base.state;
70 if (drm_dp_mst_port_has_audio(&intel_dp->mst_mgr, connector->port))
71 pipe_config->has_audio = true;
72 mst_pbn = drm_dp_calc_pbn_mode(adjusted_mode->crtc_clock, bpp);
74 pipe_config->pbn = mst_pbn;
75 slots = drm_dp_find_vcpi_slots(&intel_dp->mst_mgr, mst_pbn);
77 intel_link_compute_m_n(bpp, lane_count,
78 adjusted_mode->crtc_clock,
79 pipe_config->port_clock,
83 pipe_config->dp_m_n.tu = slots;
89 static void intel_mst_disable_dp(struct intel_encoder *encoder,
90 struct intel_crtc_state *old_crtc_state,
91 struct drm_connector_state *old_conn_state)
93 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
94 struct intel_digital_port *intel_dig_port = intel_mst->primary;
95 struct intel_dp *intel_dp = &intel_dig_port->dp;
96 struct intel_connector *connector =
97 to_intel_connector(old_conn_state->connector);
100 DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
102 drm_dp_mst_reset_vcpi_slots(&intel_dp->mst_mgr, connector->port);
104 ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
106 DRM_ERROR("failed to update payload %d\n", ret);
108 if (old_crtc_state->has_audio)
109 intel_audio_codec_disable(encoder);
112 static void intel_mst_post_disable_dp(struct intel_encoder *encoder,
113 struct intel_crtc_state *old_crtc_state,
114 struct drm_connector_state *old_conn_state)
116 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
117 struct intel_digital_port *intel_dig_port = intel_mst->primary;
118 struct intel_dp *intel_dp = &intel_dig_port->dp;
119 struct intel_connector *connector =
120 to_intel_connector(old_conn_state->connector);
122 DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
125 drm_dp_check_act_status(&intel_dp->mst_mgr);
126 /* and this can also fail */
127 drm_dp_update_payload_part2(&intel_dp->mst_mgr);
129 drm_dp_mst_deallocate_vcpi(&intel_dp->mst_mgr, connector->port);
131 intel_dp->active_mst_links--;
133 intel_mst->connector = NULL;
134 if (intel_dp->active_mst_links == 0) {
135 intel_dig_port->base.post_disable(&intel_dig_port->base,
138 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_OFF);
142 static void intel_mst_pre_enable_dp(struct intel_encoder *encoder,
143 struct intel_crtc_state *pipe_config,
144 struct drm_connector_state *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 drm_i915_private *dev_priv = to_i915(encoder->base.dev);
150 enum port port = intel_dig_port->port;
151 struct intel_connector *connector =
152 to_intel_connector(conn_state->connector);
156 /* MST encoders are bound to a crtc, not to a connector,
157 * force the mapping here for get_hw_state.
159 connector->encoder = encoder;
160 intel_mst->connector = connector;
162 DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
164 if (intel_dp->active_mst_links == 0)
165 intel_dig_port->base.pre_enable(&intel_dig_port->base,
168 ret = drm_dp_mst_allocate_vcpi(&intel_dp->mst_mgr,
171 pipe_config->dp_m_n.tu);
173 DRM_ERROR("failed to allocate vcpi\n");
178 intel_dp->active_mst_links++;
179 temp = I915_READ(DP_TP_STATUS(port));
180 I915_WRITE(DP_TP_STATUS(port), temp);
182 ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
185 static void intel_mst_enable_dp(struct intel_encoder *encoder,
186 struct intel_crtc_state *pipe_config,
187 struct drm_connector_state *conn_state)
189 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
190 struct intel_digital_port *intel_dig_port = intel_mst->primary;
191 struct intel_dp *intel_dp = &intel_dig_port->dp;
192 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
193 enum port port = intel_dig_port->port;
196 DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
198 if (intel_wait_for_register(dev_priv,
200 DP_TP_STATUS_ACT_SENT,
201 DP_TP_STATUS_ACT_SENT,
203 DRM_ERROR("Timed out waiting for ACT sent\n");
205 ret = drm_dp_check_act_status(&intel_dp->mst_mgr);
207 ret = drm_dp_update_payload_part2(&intel_dp->mst_mgr);
208 if (pipe_config->has_audio)
209 intel_audio_codec_enable(encoder, pipe_config, conn_state);
212 static bool intel_dp_mst_enc_get_hw_state(struct intel_encoder *encoder,
215 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
216 *pipe = intel_mst->pipe;
217 if (intel_mst->connector)
222 static void intel_dp_mst_enc_get_config(struct intel_encoder *encoder,
223 struct intel_crtc_state *pipe_config)
225 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
226 struct intel_digital_port *intel_dig_port = intel_mst->primary;
227 struct intel_crtc *crtc = to_intel_crtc(pipe_config->base.crtc);
228 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
229 enum transcoder cpu_transcoder = pipe_config->cpu_transcoder;
232 pipe_config->has_audio =
233 intel_ddi_is_audio_enabled(dev_priv, crtc);
235 temp = I915_READ(TRANS_DDI_FUNC_CTL(cpu_transcoder));
236 if (temp & TRANS_DDI_PHSYNC)
237 flags |= DRM_MODE_FLAG_PHSYNC;
239 flags |= DRM_MODE_FLAG_NHSYNC;
240 if (temp & TRANS_DDI_PVSYNC)
241 flags |= DRM_MODE_FLAG_PVSYNC;
243 flags |= DRM_MODE_FLAG_NVSYNC;
245 switch (temp & TRANS_DDI_BPC_MASK) {
246 case TRANS_DDI_BPC_6:
247 pipe_config->pipe_bpp = 18;
249 case TRANS_DDI_BPC_8:
250 pipe_config->pipe_bpp = 24;
252 case TRANS_DDI_BPC_10:
253 pipe_config->pipe_bpp = 30;
255 case TRANS_DDI_BPC_12:
256 pipe_config->pipe_bpp = 36;
261 pipe_config->base.adjusted_mode.flags |= flags;
263 pipe_config->lane_count =
264 ((temp & DDI_PORT_WIDTH_MASK) >> DDI_PORT_WIDTH_SHIFT) + 1;
266 intel_dp_get_m_n(crtc, pipe_config);
268 intel_ddi_clock_get(&intel_dig_port->base, pipe_config);
271 static int intel_dp_mst_get_ddc_modes(struct drm_connector *connector)
273 struct intel_connector *intel_connector = to_intel_connector(connector);
274 struct intel_dp *intel_dp = intel_connector->mst_port;
279 return intel_connector_update_modes(connector, NULL);
282 edid = drm_dp_mst_get_edid(connector, &intel_dp->mst_mgr, intel_connector->port);
283 ret = intel_connector_update_modes(connector, edid);
289 static enum drm_connector_status
290 intel_dp_mst_detect(struct drm_connector *connector, bool force)
292 struct intel_connector *intel_connector = to_intel_connector(connector);
293 struct intel_dp *intel_dp = intel_connector->mst_port;
296 return connector_status_disconnected;
297 return drm_dp_mst_detect_port(connector, &intel_dp->mst_mgr, intel_connector->port);
301 intel_dp_mst_set_property(struct drm_connector *connector,
302 struct drm_property *property,
309 intel_dp_mst_connector_destroy(struct drm_connector *connector)
311 struct intel_connector *intel_connector = to_intel_connector(connector);
313 if (!IS_ERR_OR_NULL(intel_connector->edid))
314 kfree(intel_connector->edid);
316 drm_connector_cleanup(connector);
320 static const struct drm_connector_funcs intel_dp_mst_connector_funcs = {
321 .dpms = drm_atomic_helper_connector_dpms,
322 .detect = intel_dp_mst_detect,
323 .fill_modes = drm_helper_probe_single_connector_modes,
324 .set_property = intel_dp_mst_set_property,
325 .atomic_get_property = intel_connector_atomic_get_property,
326 .late_register = intel_connector_register,
327 .early_unregister = intel_connector_unregister,
328 .destroy = intel_dp_mst_connector_destroy,
329 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
330 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
333 static int intel_dp_mst_get_modes(struct drm_connector *connector)
335 return intel_dp_mst_get_ddc_modes(connector);
338 static enum drm_mode_status
339 intel_dp_mst_mode_valid(struct drm_connector *connector,
340 struct drm_display_mode *mode)
342 struct intel_connector *intel_connector = to_intel_connector(connector);
343 struct intel_dp *intel_dp = intel_connector->mst_port;
344 int max_dotclk = to_i915(connector->dev)->max_dotclk_freq;
345 int bpp = 24; /* MST uses fixed bpp */
346 int max_rate, mode_rate, max_lanes, max_link_clock;
348 max_link_clock = intel_dp_max_link_rate(intel_dp);
349 max_lanes = drm_dp_max_lane_count(intel_dp->dpcd);
351 max_rate = intel_dp_max_data_rate(max_link_clock, max_lanes);
352 mode_rate = intel_dp_link_required(mode->clock, bpp);
354 /* TODO - validate mode against available PBN for link */
355 if (mode->clock < 10000)
356 return MODE_CLOCK_LOW;
358 if (mode->flags & DRM_MODE_FLAG_DBLCLK)
359 return MODE_H_ILLEGAL;
361 if (mode_rate > max_rate || mode->clock > max_dotclk)
362 return MODE_CLOCK_HIGH;
367 static struct drm_encoder *intel_mst_atomic_best_encoder(struct drm_connector *connector,
368 struct drm_connector_state *state)
370 struct intel_connector *intel_connector = to_intel_connector(connector);
371 struct intel_dp *intel_dp = intel_connector->mst_port;
372 struct intel_crtc *crtc = to_intel_crtc(state->crtc);
376 return &intel_dp->mst_encoders[crtc->pipe]->base.base;
379 static struct drm_encoder *intel_mst_best_encoder(struct drm_connector *connector)
381 struct intel_connector *intel_connector = to_intel_connector(connector);
382 struct intel_dp *intel_dp = intel_connector->mst_port;
385 return &intel_dp->mst_encoders[0]->base.base;
388 static const struct drm_connector_helper_funcs intel_dp_mst_connector_helper_funcs = {
389 .get_modes = intel_dp_mst_get_modes,
390 .mode_valid = intel_dp_mst_mode_valid,
391 .atomic_best_encoder = intel_mst_atomic_best_encoder,
392 .best_encoder = intel_mst_best_encoder,
395 static void intel_dp_mst_encoder_destroy(struct drm_encoder *encoder)
397 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
399 drm_encoder_cleanup(encoder);
403 static const struct drm_encoder_funcs intel_dp_mst_enc_funcs = {
404 .destroy = intel_dp_mst_encoder_destroy,
407 static bool intel_dp_mst_get_hw_state(struct intel_connector *connector)
409 if (connector->encoder && connector->base.state->crtc) {
411 if (!connector->encoder->get_hw_state(connector->encoder, &pipe))
418 static void intel_connector_add_to_fbdev(struct intel_connector *connector)
420 #ifdef CONFIG_DRM_FBDEV_EMULATION
421 struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
424 drm_fb_helper_add_one_connector(&dev_priv->fbdev->helper,
429 static void intel_connector_remove_from_fbdev(struct intel_connector *connector)
431 #ifdef CONFIG_DRM_FBDEV_EMULATION
432 struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
435 drm_fb_helper_remove_one_connector(&dev_priv->fbdev->helper,
440 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)
442 struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr);
443 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
444 struct drm_device *dev = intel_dig_port->base.base.dev;
445 struct intel_connector *intel_connector;
446 struct drm_connector *connector;
449 intel_connector = intel_connector_alloc();
450 if (!intel_connector)
453 connector = &intel_connector->base;
454 drm_connector_init(dev, connector, &intel_dp_mst_connector_funcs, DRM_MODE_CONNECTOR_DisplayPort);
455 drm_connector_helper_add(connector, &intel_dp_mst_connector_helper_funcs);
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 for (i = PIPE_A; i <= PIPE_C; i++) {
462 drm_mode_connector_attach_encoder(&intel_connector->base,
463 &intel_dp->mst_encoders[i]->base.base);
465 intel_dp_add_properties(intel_dp, connector);
467 drm_object_attach_property(&connector->base, dev->mode_config.path_property, 0);
468 drm_object_attach_property(&connector->base, dev->mode_config.tile_property, 0);
470 drm_mode_connector_set_path_property(connector, pathprop);
474 static void intel_dp_register_mst_connector(struct drm_connector *connector)
476 struct intel_connector *intel_connector = to_intel_connector(connector);
477 struct drm_device *dev = connector->dev;
479 drm_modeset_lock_all(dev);
480 intel_connector_add_to_fbdev(intel_connector);
481 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 drm_connector_unregister(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, "DP-MST %c", pipe_name(pipe));
539 intel_encoder->type = INTEL_OUTPUT_DP_MST;
540 intel_encoder->power_domain = intel_dig_port->base.power_domain;
541 intel_encoder->port = intel_dig_port->port;
542 intel_encoder->crtc_mask = 0x7;
543 intel_encoder->cloneable = 0;
545 intel_encoder->compute_config = intel_dp_mst_compute_config;
546 intel_encoder->disable = intel_mst_disable_dp;
547 intel_encoder->post_disable = intel_mst_post_disable_dp;
548 intel_encoder->pre_enable = intel_mst_pre_enable_dp;
549 intel_encoder->enable = intel_mst_enable_dp;
550 intel_encoder->get_hw_state = intel_dp_mst_enc_get_hw_state;
551 intel_encoder->get_config = intel_dp_mst_enc_get_config;
558 intel_dp_create_fake_mst_encoders(struct intel_digital_port *intel_dig_port)
561 struct intel_dp *intel_dp = &intel_dig_port->dp;
563 for (i = PIPE_A; i <= PIPE_C; i++)
564 intel_dp->mst_encoders[i] = intel_dp_create_fake_mst_encoder(intel_dig_port, i);
569 intel_dp_mst_encoder_init(struct intel_digital_port *intel_dig_port, int conn_base_id)
571 struct intel_dp *intel_dp = &intel_dig_port->dp;
572 struct drm_device *dev = intel_dig_port->base.base.dev;
575 intel_dp->can_mst = true;
576 intel_dp->mst_mgr.cbs = &mst_cbs;
578 /* create encoders */
579 intel_dp_create_fake_mst_encoders(intel_dig_port);
580 ret = drm_dp_mst_topology_mgr_init(&intel_dp->mst_mgr, dev,
581 &intel_dp->aux, 16, 3, conn_base_id);
583 intel_dp->can_mst = false;
590 intel_dp_mst_encoder_cleanup(struct intel_digital_port *intel_dig_port)
592 struct intel_dp *intel_dp = &intel_dig_port->dp;
594 if (!intel_dp->can_mst)
597 drm_dp_mst_topology_mgr_destroy(&intel_dp->mst_mgr);
598 /* encoders will get killed by normal cleanup */