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 if (drm_dp_mst_port_has_audio(&intel_dp->mst_mgr, found->port))
81 pipe_config->has_audio = true;
82 mst_pbn = drm_dp_calc_pbn_mode(adjusted_mode->crtc_clock, bpp);
84 pipe_config->pbn = mst_pbn;
85 slots = drm_dp_find_vcpi_slots(&intel_dp->mst_mgr, mst_pbn);
87 intel_link_compute_m_n(bpp, lane_count,
88 adjusted_mode->crtc_clock,
89 pipe_config->port_clock,
90 &pipe_config->dp_m_n);
92 pipe_config->dp_m_n.tu = slots;
98 static void intel_mst_disable_dp(struct intel_encoder *encoder)
100 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
101 struct intel_digital_port *intel_dig_port = intel_mst->primary;
102 struct intel_dp *intel_dp = &intel_dig_port->dp;
103 struct drm_device *dev = encoder->base.dev;
104 struct drm_i915_private *dev_priv = dev->dev_private;
105 struct drm_crtc *crtc = encoder->base.crtc;
106 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
110 DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
112 drm_dp_mst_reset_vcpi_slots(&intel_dp->mst_mgr, intel_mst->connector->port);
114 ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
116 DRM_ERROR("failed to update payload %d\n", ret);
118 if (intel_crtc->config->has_audio) {
119 intel_audio_codec_disable(encoder);
120 intel_display_power_put(dev_priv, POWER_DOMAIN_AUDIO);
124 static void intel_mst_post_disable_dp(struct intel_encoder *encoder)
126 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
127 struct intel_digital_port *intel_dig_port = intel_mst->primary;
128 struct intel_dp *intel_dp = &intel_dig_port->dp;
130 DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
133 drm_dp_check_act_status(&intel_dp->mst_mgr);
134 /* and this can also fail */
135 drm_dp_update_payload_part2(&intel_dp->mst_mgr);
137 drm_dp_mst_deallocate_vcpi(&intel_dp->mst_mgr, intel_mst->connector->port);
139 intel_dp->active_mst_links--;
141 intel_mst->connector = NULL;
142 if (intel_dp->active_mst_links == 0) {
143 intel_dig_port->base.post_disable(&intel_dig_port->base);
144 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_OFF);
148 static void intel_mst_pre_enable_dp(struct intel_encoder *encoder)
150 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
151 struct intel_digital_port *intel_dig_port = intel_mst->primary;
152 struct intel_dp *intel_dp = &intel_dig_port->dp;
153 struct drm_device *dev = encoder->base.dev;
154 struct drm_i915_private *dev_priv = dev->dev_private;
155 enum port port = intel_dig_port->port;
158 struct intel_connector *found = NULL, *connector;
160 struct drm_crtc *crtc = encoder->base.crtc;
161 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
163 for_each_intel_connector(dev, connector) {
164 if (connector->base.state->best_encoder == &encoder->base) {
171 DRM_ERROR("can't find connector\n");
175 /* MST encoders are bound to a crtc, not to a connector,
176 * force the mapping here for get_hw_state.
178 found->encoder = encoder;
180 DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
182 intel_mst->connector = found;
184 if (intel_dp->active_mst_links == 0) {
185 intel_prepare_ddi_buffer(&intel_dig_port->base);
187 intel_ddi_clk_select(&intel_dig_port->base, intel_crtc->config);
189 intel_dp_set_link_params(intel_dp, intel_crtc->config);
191 intel_ddi_init_dp_buf_reg(&intel_dig_port->base);
193 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON);
195 intel_dp_start_link_train(intel_dp);
196 intel_dp_stop_link_train(intel_dp);
199 ret = drm_dp_mst_allocate_vcpi(&intel_dp->mst_mgr,
200 intel_mst->connector->port,
201 intel_crtc->config->pbn, &slots);
203 DRM_ERROR("failed to allocate vcpi\n");
208 intel_dp->active_mst_links++;
209 temp = I915_READ(DP_TP_STATUS(port));
210 I915_WRITE(DP_TP_STATUS(port), temp);
212 ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
215 static void intel_mst_enable_dp(struct intel_encoder *encoder)
217 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
218 struct intel_digital_port *intel_dig_port = intel_mst->primary;
219 struct intel_dp *intel_dp = &intel_dig_port->dp;
220 struct drm_device *dev = intel_dig_port->base.base.dev;
221 struct drm_i915_private *dev_priv = dev->dev_private;
222 struct intel_crtc *crtc = to_intel_crtc(encoder->base.crtc);
223 enum port port = intel_dig_port->port;
226 DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
228 if (wait_for((I915_READ(DP_TP_STATUS(port)) & DP_TP_STATUS_ACT_SENT),
230 DRM_ERROR("Timed out waiting for ACT sent\n");
232 ret = drm_dp_check_act_status(&intel_dp->mst_mgr);
234 ret = drm_dp_update_payload_part2(&intel_dp->mst_mgr);
236 if (crtc->config->has_audio) {
237 DRM_DEBUG_DRIVER("Enabling DP audio on pipe %c\n",
238 pipe_name(crtc->pipe));
239 intel_display_power_get(dev_priv, POWER_DOMAIN_AUDIO);
240 intel_audio_codec_enable(encoder);
244 static bool intel_dp_mst_enc_get_hw_state(struct intel_encoder *encoder,
247 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
248 *pipe = intel_mst->pipe;
249 if (intel_mst->connector)
254 static void intel_dp_mst_enc_get_config(struct intel_encoder *encoder,
255 struct intel_crtc_state *pipe_config)
257 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
258 struct intel_digital_port *intel_dig_port = intel_mst->primary;
259 struct intel_crtc *crtc = to_intel_crtc(encoder->base.crtc);
260 struct drm_device *dev = encoder->base.dev;
261 struct drm_i915_private *dev_priv = dev->dev_private;
262 enum transcoder cpu_transcoder = pipe_config->cpu_transcoder;
265 pipe_config->has_dp_encoder = true;
267 pipe_config->has_audio =
268 intel_ddi_is_audio_enabled(dev_priv, crtc);
270 temp = I915_READ(TRANS_DDI_FUNC_CTL(cpu_transcoder));
271 if (temp & TRANS_DDI_PHSYNC)
272 flags |= DRM_MODE_FLAG_PHSYNC;
274 flags |= DRM_MODE_FLAG_NHSYNC;
275 if (temp & TRANS_DDI_PVSYNC)
276 flags |= DRM_MODE_FLAG_PVSYNC;
278 flags |= DRM_MODE_FLAG_NVSYNC;
280 switch (temp & TRANS_DDI_BPC_MASK) {
281 case TRANS_DDI_BPC_6:
282 pipe_config->pipe_bpp = 18;
284 case TRANS_DDI_BPC_8:
285 pipe_config->pipe_bpp = 24;
287 case TRANS_DDI_BPC_10:
288 pipe_config->pipe_bpp = 30;
290 case TRANS_DDI_BPC_12:
291 pipe_config->pipe_bpp = 36;
296 pipe_config->base.adjusted_mode.flags |= flags;
298 pipe_config->lane_count =
299 ((temp & DDI_PORT_WIDTH_MASK) >> DDI_PORT_WIDTH_SHIFT) + 1;
301 intel_dp_get_m_n(crtc, pipe_config);
303 intel_ddi_clock_get(&intel_dig_port->base, pipe_config);
306 static int intel_dp_mst_get_ddc_modes(struct drm_connector *connector)
308 struct intel_connector *intel_connector = to_intel_connector(connector);
309 struct intel_dp *intel_dp = intel_connector->mst_port;
314 return intel_connector_update_modes(connector, NULL);
317 edid = drm_dp_mst_get_edid(connector, &intel_dp->mst_mgr, intel_connector->port);
318 ret = intel_connector_update_modes(connector, edid);
324 static enum drm_connector_status
325 intel_dp_mst_detect(struct drm_connector *connector, bool force)
327 struct intel_connector *intel_connector = to_intel_connector(connector);
328 struct intel_dp *intel_dp = intel_connector->mst_port;
331 return connector_status_disconnected;
332 return drm_dp_mst_detect_port(connector, &intel_dp->mst_mgr, intel_connector->port);
336 intel_dp_mst_set_property(struct drm_connector *connector,
337 struct drm_property *property,
344 intel_dp_mst_connector_destroy(struct drm_connector *connector)
346 struct intel_connector *intel_connector = to_intel_connector(connector);
348 if (!IS_ERR_OR_NULL(intel_connector->edid))
349 kfree(intel_connector->edid);
351 drm_connector_cleanup(connector);
355 static const struct drm_connector_funcs intel_dp_mst_connector_funcs = {
356 .dpms = drm_atomic_helper_connector_dpms,
357 .detect = intel_dp_mst_detect,
358 .fill_modes = drm_helper_probe_single_connector_modes,
359 .set_property = intel_dp_mst_set_property,
360 .atomic_get_property = intel_connector_atomic_get_property,
361 .destroy = intel_dp_mst_connector_destroy,
362 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
363 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
366 static int intel_dp_mst_get_modes(struct drm_connector *connector)
368 return intel_dp_mst_get_ddc_modes(connector);
371 static enum drm_mode_status
372 intel_dp_mst_mode_valid(struct drm_connector *connector,
373 struct drm_display_mode *mode)
375 int max_dotclk = to_i915(connector->dev)->max_dotclk_freq;
377 /* TODO - validate mode against available PBN for link */
378 if (mode->clock < 10000)
379 return MODE_CLOCK_LOW;
381 if (mode->flags & DRM_MODE_FLAG_DBLCLK)
382 return MODE_H_ILLEGAL;
384 if (mode->clock > max_dotclk)
385 return MODE_CLOCK_HIGH;
390 static struct drm_encoder *intel_mst_atomic_best_encoder(struct drm_connector *connector,
391 struct drm_connector_state *state)
393 struct intel_connector *intel_connector = to_intel_connector(connector);
394 struct intel_dp *intel_dp = intel_connector->mst_port;
395 struct intel_crtc *crtc = to_intel_crtc(state->crtc);
399 return &intel_dp->mst_encoders[crtc->pipe]->base.base;
402 static struct drm_encoder *intel_mst_best_encoder(struct drm_connector *connector)
404 struct intel_connector *intel_connector = to_intel_connector(connector);
405 struct intel_dp *intel_dp = intel_connector->mst_port;
408 return &intel_dp->mst_encoders[0]->base.base;
411 static const struct drm_connector_helper_funcs intel_dp_mst_connector_helper_funcs = {
412 .get_modes = intel_dp_mst_get_modes,
413 .mode_valid = intel_dp_mst_mode_valid,
414 .atomic_best_encoder = intel_mst_atomic_best_encoder,
415 .best_encoder = intel_mst_best_encoder,
418 static void intel_dp_mst_encoder_destroy(struct drm_encoder *encoder)
420 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
422 drm_encoder_cleanup(encoder);
426 static const struct drm_encoder_funcs intel_dp_mst_enc_funcs = {
427 .destroy = intel_dp_mst_encoder_destroy,
430 static bool intel_dp_mst_get_hw_state(struct intel_connector *connector)
432 if (connector->encoder && connector->base.state->crtc) {
434 if (!connector->encoder->get_hw_state(connector->encoder, &pipe))
441 static void intel_connector_add_to_fbdev(struct intel_connector *connector)
443 #ifdef CONFIG_DRM_FBDEV_EMULATION
444 struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
447 drm_fb_helper_add_one_connector(&dev_priv->fbdev->helper,
452 static void intel_connector_remove_from_fbdev(struct intel_connector *connector)
454 #ifdef CONFIG_DRM_FBDEV_EMULATION
455 struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
458 drm_fb_helper_remove_one_connector(&dev_priv->fbdev->helper,
463 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)
465 struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr);
466 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
467 struct drm_device *dev = intel_dig_port->base.base.dev;
468 struct intel_connector *intel_connector;
469 struct drm_connector *connector;
472 intel_connector = intel_connector_alloc();
473 if (!intel_connector)
476 connector = &intel_connector->base;
477 drm_connector_init(dev, connector, &intel_dp_mst_connector_funcs, DRM_MODE_CONNECTOR_DisplayPort);
478 drm_connector_helper_add(connector, &intel_dp_mst_connector_helper_funcs);
480 intel_connector->unregister = intel_connector_unregister;
481 intel_connector->get_hw_state = intel_dp_mst_get_hw_state;
482 intel_connector->mst_port = intel_dp;
483 intel_connector->port = port;
485 for (i = PIPE_A; i <= PIPE_C; i++) {
486 drm_mode_connector_attach_encoder(&intel_connector->base,
487 &intel_dp->mst_encoders[i]->base.base);
489 intel_dp_add_properties(intel_dp, connector);
491 drm_object_attach_property(&connector->base, dev->mode_config.path_property, 0);
492 drm_object_attach_property(&connector->base, dev->mode_config.tile_property, 0);
494 drm_mode_connector_set_path_property(connector, pathprop);
498 static void intel_dp_register_mst_connector(struct drm_connector *connector)
500 struct intel_connector *intel_connector = to_intel_connector(connector);
501 struct drm_device *dev = connector->dev;
502 drm_modeset_lock_all(dev);
503 intel_connector_add_to_fbdev(intel_connector);
504 drm_modeset_unlock_all(dev);
505 drm_connector_register(&intel_connector->base);
508 static void intel_dp_destroy_mst_connector(struct drm_dp_mst_topology_mgr *mgr,
509 struct drm_connector *connector)
511 struct intel_connector *intel_connector = to_intel_connector(connector);
512 struct drm_device *dev = connector->dev;
514 intel_connector->unregister(intel_connector);
516 /* need to nuke the connector */
517 drm_modeset_lock_all(dev);
518 intel_connector_remove_from_fbdev(intel_connector);
519 intel_connector->mst_port = NULL;
520 drm_modeset_unlock_all(dev);
522 drm_connector_unreference(&intel_connector->base);
526 static void intel_dp_mst_hotplug(struct drm_dp_mst_topology_mgr *mgr)
528 struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr);
529 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
530 struct drm_device *dev = intel_dig_port->base.base.dev;
532 drm_kms_helper_hotplug_event(dev);
535 static const struct drm_dp_mst_topology_cbs mst_cbs = {
536 .add_connector = intel_dp_add_mst_connector,
537 .register_connector = intel_dp_register_mst_connector,
538 .destroy_connector = intel_dp_destroy_mst_connector,
539 .hotplug = intel_dp_mst_hotplug,
542 static struct intel_dp_mst_encoder *
543 intel_dp_create_fake_mst_encoder(struct intel_digital_port *intel_dig_port, enum pipe pipe)
545 struct intel_dp_mst_encoder *intel_mst;
546 struct intel_encoder *intel_encoder;
547 struct drm_device *dev = intel_dig_port->base.base.dev;
549 intel_mst = kzalloc(sizeof(*intel_mst), GFP_KERNEL);
554 intel_mst->pipe = pipe;
555 intel_encoder = &intel_mst->base;
556 intel_mst->primary = intel_dig_port;
558 drm_encoder_init(dev, &intel_encoder->base, &intel_dp_mst_enc_funcs,
559 DRM_MODE_ENCODER_DPMST, NULL);
561 intel_encoder->type = INTEL_OUTPUT_DP_MST;
562 intel_encoder->crtc_mask = 0x7;
563 intel_encoder->cloneable = 0;
565 intel_encoder->compute_config = intel_dp_mst_compute_config;
566 intel_encoder->disable = intel_mst_disable_dp;
567 intel_encoder->post_disable = intel_mst_post_disable_dp;
568 intel_encoder->pre_enable = intel_mst_pre_enable_dp;
569 intel_encoder->enable = intel_mst_enable_dp;
570 intel_encoder->get_hw_state = intel_dp_mst_enc_get_hw_state;
571 intel_encoder->get_config = intel_dp_mst_enc_get_config;
578 intel_dp_create_fake_mst_encoders(struct intel_digital_port *intel_dig_port)
581 struct intel_dp *intel_dp = &intel_dig_port->dp;
583 for (i = PIPE_A; i <= PIPE_C; i++)
584 intel_dp->mst_encoders[i] = intel_dp_create_fake_mst_encoder(intel_dig_port, i);
589 intel_dp_mst_encoder_init(struct intel_digital_port *intel_dig_port, int conn_base_id)
591 struct intel_dp *intel_dp = &intel_dig_port->dp;
592 struct drm_device *dev = intel_dig_port->base.base.dev;
595 intel_dp->can_mst = true;
596 intel_dp->mst_mgr.cbs = &mst_cbs;
598 /* create encoders */
599 intel_dp_create_fake_mst_encoders(intel_dig_port);
600 ret = drm_dp_mst_topology_mgr_init(&intel_dp->mst_mgr, dev->dev, &intel_dp->aux, 16, 3, conn_base_id);
602 intel_dp->can_mst = false;
609 intel_dp_mst_encoder_cleanup(struct intel_digital_port *intel_dig_port)
611 struct intel_dp *intel_dp = &intel_dig_port->dp;
613 if (!intel_dp->can_mst)
616 drm_dp_mst_topology_mgr_destroy(&intel_dp->mst_mgr);
617 /* encoders will get killed by normal cleanup */