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;
48 pipe_config->has_pch_encoder = false;
50 if (intel_dp->compliance.test_data.bpc) {
51 bpp = intel_dp->compliance.test_data.bpc * 3;
52 DRM_DEBUG_KMS("Setting pipe bpp to %d\n",
56 * for MST we always configure max link bw - the spec doesn't
57 * seem to suggest we should do otherwise.
59 lane_count = drm_dp_max_lane_count(intel_dp->dpcd);
61 pipe_config->lane_count = lane_count;
63 pipe_config->pipe_bpp = bpp;
64 pipe_config->port_clock = intel_dp_max_link_rate(intel_dp);
66 state = pipe_config->base.state;
68 if (drm_dp_mst_port_has_audio(&intel_dp->mst_mgr, connector->port))
69 pipe_config->has_audio = true;
70 mst_pbn = drm_dp_calc_pbn_mode(adjusted_mode->crtc_clock, bpp);
72 pipe_config->pbn = mst_pbn;
73 slots = drm_dp_find_vcpi_slots(&intel_dp->mst_mgr, mst_pbn);
75 intel_link_compute_m_n(bpp, lane_count,
76 adjusted_mode->crtc_clock,
77 pipe_config->port_clock,
78 &pipe_config->dp_m_n);
80 pipe_config->dp_m_n.tu = slots;
86 static void intel_mst_disable_dp(struct intel_encoder *encoder,
87 struct intel_crtc_state *old_crtc_state,
88 struct drm_connector_state *old_conn_state)
90 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
91 struct intel_digital_port *intel_dig_port = intel_mst->primary;
92 struct intel_dp *intel_dp = &intel_dig_port->dp;
93 struct intel_connector *connector =
94 to_intel_connector(old_conn_state->connector);
97 DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
99 drm_dp_mst_reset_vcpi_slots(&intel_dp->mst_mgr, connector->port);
101 ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
103 DRM_ERROR("failed to update payload %d\n", ret);
105 if (old_crtc_state->has_audio)
106 intel_audio_codec_disable(encoder);
109 static void intel_mst_post_disable_dp(struct intel_encoder *encoder,
110 struct intel_crtc_state *old_crtc_state,
111 struct drm_connector_state *old_conn_state)
113 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
114 struct intel_digital_port *intel_dig_port = intel_mst->primary;
115 struct intel_dp *intel_dp = &intel_dig_port->dp;
116 struct intel_connector *connector =
117 to_intel_connector(old_conn_state->connector);
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, 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,
135 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_OFF);
139 static void intel_mst_pre_enable_dp(struct intel_encoder *encoder,
140 struct intel_crtc_state *pipe_config,
141 struct drm_connector_state *conn_state)
143 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
144 struct intel_digital_port *intel_dig_port = intel_mst->primary;
145 struct intel_dp *intel_dp = &intel_dig_port->dp;
146 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
147 enum port port = intel_dig_port->port;
148 struct intel_connector *connector =
149 to_intel_connector(conn_state->connector);
153 /* MST encoders are bound to a crtc, not to a connector,
154 * force the mapping here for get_hw_state.
156 connector->encoder = encoder;
157 intel_mst->connector = connector;
159 DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
161 if (intel_dp->active_mst_links == 0)
162 intel_dig_port->base.pre_enable(&intel_dig_port->base,
165 ret = drm_dp_mst_allocate_vcpi(&intel_dp->mst_mgr,
168 pipe_config->dp_m_n.tu);
170 DRM_ERROR("failed to allocate vcpi\n");
175 intel_dp->active_mst_links++;
176 temp = I915_READ(DP_TP_STATUS(port));
177 I915_WRITE(DP_TP_STATUS(port), temp);
179 ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
182 static void intel_mst_enable_dp(struct intel_encoder *encoder,
183 struct intel_crtc_state *pipe_config,
184 struct drm_connector_state *conn_state)
186 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
187 struct intel_digital_port *intel_dig_port = intel_mst->primary;
188 struct intel_dp *intel_dp = &intel_dig_port->dp;
189 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
190 enum port port = intel_dig_port->port;
193 DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
195 if (intel_wait_for_register(dev_priv,
197 DP_TP_STATUS_ACT_SENT,
198 DP_TP_STATUS_ACT_SENT,
200 DRM_ERROR("Timed out waiting for ACT sent\n");
202 ret = drm_dp_check_act_status(&intel_dp->mst_mgr);
204 ret = drm_dp_update_payload_part2(&intel_dp->mst_mgr);
205 if (pipe_config->has_audio)
206 intel_audio_codec_enable(encoder, pipe_config, conn_state);
209 static bool intel_dp_mst_enc_get_hw_state(struct intel_encoder *encoder,
212 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
213 *pipe = intel_mst->pipe;
214 if (intel_mst->connector)
219 static void intel_dp_mst_enc_get_config(struct intel_encoder *encoder,
220 struct intel_crtc_state *pipe_config)
222 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
223 struct intel_digital_port *intel_dig_port = intel_mst->primary;
224 struct intel_crtc *crtc = to_intel_crtc(pipe_config->base.crtc);
225 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
226 enum transcoder cpu_transcoder = pipe_config->cpu_transcoder;
229 pipe_config->has_audio =
230 intel_ddi_is_audio_enabled(dev_priv, crtc);
232 temp = I915_READ(TRANS_DDI_FUNC_CTL(cpu_transcoder));
233 if (temp & TRANS_DDI_PHSYNC)
234 flags |= DRM_MODE_FLAG_PHSYNC;
236 flags |= DRM_MODE_FLAG_NHSYNC;
237 if (temp & TRANS_DDI_PVSYNC)
238 flags |= DRM_MODE_FLAG_PVSYNC;
240 flags |= DRM_MODE_FLAG_NVSYNC;
242 switch (temp & TRANS_DDI_BPC_MASK) {
243 case TRANS_DDI_BPC_6:
244 pipe_config->pipe_bpp = 18;
246 case TRANS_DDI_BPC_8:
247 pipe_config->pipe_bpp = 24;
249 case TRANS_DDI_BPC_10:
250 pipe_config->pipe_bpp = 30;
252 case TRANS_DDI_BPC_12:
253 pipe_config->pipe_bpp = 36;
258 pipe_config->base.adjusted_mode.flags |= flags;
260 pipe_config->lane_count =
261 ((temp & DDI_PORT_WIDTH_MASK) >> DDI_PORT_WIDTH_SHIFT) + 1;
263 intel_dp_get_m_n(crtc, pipe_config);
265 intel_ddi_clock_get(&intel_dig_port->base, pipe_config);
268 static int intel_dp_mst_get_ddc_modes(struct drm_connector *connector)
270 struct intel_connector *intel_connector = to_intel_connector(connector);
271 struct intel_dp *intel_dp = intel_connector->mst_port;
276 return intel_connector_update_modes(connector, NULL);
279 edid = drm_dp_mst_get_edid(connector, &intel_dp->mst_mgr, intel_connector->port);
280 ret = intel_connector_update_modes(connector, edid);
286 static enum drm_connector_status
287 intel_dp_mst_detect(struct drm_connector *connector, bool force)
289 struct intel_connector *intel_connector = to_intel_connector(connector);
290 struct intel_dp *intel_dp = intel_connector->mst_port;
293 return connector_status_disconnected;
294 return drm_dp_mst_detect_port(connector, &intel_dp->mst_mgr, intel_connector->port);
298 intel_dp_mst_set_property(struct drm_connector *connector,
299 struct drm_property *property,
306 intel_dp_mst_connector_destroy(struct drm_connector *connector)
308 struct intel_connector *intel_connector = to_intel_connector(connector);
310 if (!IS_ERR_OR_NULL(intel_connector->edid))
311 kfree(intel_connector->edid);
313 drm_connector_cleanup(connector);
317 static const struct drm_connector_funcs intel_dp_mst_connector_funcs = {
318 .dpms = drm_atomic_helper_connector_dpms,
319 .detect = intel_dp_mst_detect,
320 .fill_modes = drm_helper_probe_single_connector_modes,
321 .set_property = intel_dp_mst_set_property,
322 .atomic_get_property = intel_connector_atomic_get_property,
323 .late_register = intel_connector_register,
324 .early_unregister = intel_connector_unregister,
325 .destroy = intel_dp_mst_connector_destroy,
326 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
327 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
330 static int intel_dp_mst_get_modes(struct drm_connector *connector)
332 return intel_dp_mst_get_ddc_modes(connector);
335 static enum drm_mode_status
336 intel_dp_mst_mode_valid(struct drm_connector *connector,
337 struct drm_display_mode *mode)
339 struct intel_connector *intel_connector = to_intel_connector(connector);
340 struct intel_dp *intel_dp = intel_connector->mst_port;
341 int max_dotclk = to_i915(connector->dev)->max_dotclk_freq;
342 int bpp = 24; /* MST uses fixed bpp */
343 int max_rate, mode_rate, max_lanes, max_link_clock;
345 max_link_clock = intel_dp_max_link_rate(intel_dp);
346 max_lanes = drm_dp_max_lane_count(intel_dp->dpcd);
348 max_rate = intel_dp_max_data_rate(max_link_clock, max_lanes);
349 mode_rate = intel_dp_link_required(mode->clock, bpp);
351 /* TODO - validate mode against available PBN for link */
352 if (mode->clock < 10000)
353 return MODE_CLOCK_LOW;
355 if (mode->flags & DRM_MODE_FLAG_DBLCLK)
356 return MODE_H_ILLEGAL;
358 if (mode_rate > max_rate || mode->clock > max_dotclk)
359 return MODE_CLOCK_HIGH;
364 static struct drm_encoder *intel_mst_atomic_best_encoder(struct drm_connector *connector,
365 struct drm_connector_state *state)
367 struct intel_connector *intel_connector = to_intel_connector(connector);
368 struct intel_dp *intel_dp = intel_connector->mst_port;
369 struct intel_crtc *crtc = to_intel_crtc(state->crtc);
373 return &intel_dp->mst_encoders[crtc->pipe]->base.base;
376 static struct drm_encoder *intel_mst_best_encoder(struct drm_connector *connector)
378 struct intel_connector *intel_connector = to_intel_connector(connector);
379 struct intel_dp *intel_dp = intel_connector->mst_port;
382 return &intel_dp->mst_encoders[0]->base.base;
385 static const struct drm_connector_helper_funcs intel_dp_mst_connector_helper_funcs = {
386 .get_modes = intel_dp_mst_get_modes,
387 .mode_valid = intel_dp_mst_mode_valid,
388 .atomic_best_encoder = intel_mst_atomic_best_encoder,
389 .best_encoder = intel_mst_best_encoder,
392 static void intel_dp_mst_encoder_destroy(struct drm_encoder *encoder)
394 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
396 drm_encoder_cleanup(encoder);
400 static const struct drm_encoder_funcs intel_dp_mst_enc_funcs = {
401 .destroy = intel_dp_mst_encoder_destroy,
404 static bool intel_dp_mst_get_hw_state(struct intel_connector *connector)
406 if (connector->encoder && connector->base.state->crtc) {
408 if (!connector->encoder->get_hw_state(connector->encoder, &pipe))
415 static void intel_connector_add_to_fbdev(struct intel_connector *connector)
417 #ifdef CONFIG_DRM_FBDEV_EMULATION
418 struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
421 drm_fb_helper_add_one_connector(&dev_priv->fbdev->helper,
426 static void intel_connector_remove_from_fbdev(struct intel_connector *connector)
428 #ifdef CONFIG_DRM_FBDEV_EMULATION
429 struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
432 drm_fb_helper_remove_one_connector(&dev_priv->fbdev->helper,
437 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)
439 struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr);
440 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
441 struct drm_device *dev = intel_dig_port->base.base.dev;
442 struct intel_connector *intel_connector;
443 struct drm_connector *connector;
446 intel_connector = intel_connector_alloc();
447 if (!intel_connector)
450 connector = &intel_connector->base;
451 drm_connector_init(dev, connector, &intel_dp_mst_connector_funcs, DRM_MODE_CONNECTOR_DisplayPort);
452 drm_connector_helper_add(connector, &intel_dp_mst_connector_helper_funcs);
454 intel_connector->get_hw_state = intel_dp_mst_get_hw_state;
455 intel_connector->mst_port = intel_dp;
456 intel_connector->port = port;
458 for (i = PIPE_A; i <= PIPE_C; i++) {
459 drm_mode_connector_attach_encoder(&intel_connector->base,
460 &intel_dp->mst_encoders[i]->base.base);
462 intel_dp_add_properties(intel_dp, connector);
464 drm_object_attach_property(&connector->base, dev->mode_config.path_property, 0);
465 drm_object_attach_property(&connector->base, dev->mode_config.tile_property, 0);
467 drm_mode_connector_set_path_property(connector, pathprop);
471 static void intel_dp_register_mst_connector(struct drm_connector *connector)
473 struct intel_connector *intel_connector = to_intel_connector(connector);
474 struct drm_device *dev = connector->dev;
476 drm_modeset_lock_all(dev);
477 intel_connector_add_to_fbdev(intel_connector);
478 drm_modeset_unlock_all(dev);
480 drm_connector_register(&intel_connector->base);
483 static void intel_dp_destroy_mst_connector(struct drm_dp_mst_topology_mgr *mgr,
484 struct drm_connector *connector)
486 struct intel_connector *intel_connector = to_intel_connector(connector);
487 struct drm_device *dev = connector->dev;
489 drm_connector_unregister(connector);
491 /* need to nuke the connector */
492 drm_modeset_lock_all(dev);
493 intel_connector_remove_from_fbdev(intel_connector);
494 intel_connector->mst_port = NULL;
495 drm_modeset_unlock_all(dev);
497 drm_connector_unreference(&intel_connector->base);
501 static void intel_dp_mst_hotplug(struct drm_dp_mst_topology_mgr *mgr)
503 struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr);
504 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
505 struct drm_device *dev = intel_dig_port->base.base.dev;
507 drm_kms_helper_hotplug_event(dev);
510 static const struct drm_dp_mst_topology_cbs mst_cbs = {
511 .add_connector = intel_dp_add_mst_connector,
512 .register_connector = intel_dp_register_mst_connector,
513 .destroy_connector = intel_dp_destroy_mst_connector,
514 .hotplug = intel_dp_mst_hotplug,
517 static struct intel_dp_mst_encoder *
518 intel_dp_create_fake_mst_encoder(struct intel_digital_port *intel_dig_port, enum pipe pipe)
520 struct intel_dp_mst_encoder *intel_mst;
521 struct intel_encoder *intel_encoder;
522 struct drm_device *dev = intel_dig_port->base.base.dev;
524 intel_mst = kzalloc(sizeof(*intel_mst), GFP_KERNEL);
529 intel_mst->pipe = pipe;
530 intel_encoder = &intel_mst->base;
531 intel_mst->primary = intel_dig_port;
533 drm_encoder_init(dev, &intel_encoder->base, &intel_dp_mst_enc_funcs,
534 DRM_MODE_ENCODER_DPMST, "DP-MST %c", pipe_name(pipe));
536 intel_encoder->type = INTEL_OUTPUT_DP_MST;
537 intel_encoder->power_domain = intel_dig_port->base.power_domain;
538 intel_encoder->port = intel_dig_port->port;
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,
578 &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 */